Extrusion coating device for internal corrosion prevention of pipeline and coating method thereof

The invention discloses an extrusion coating device for internal corrosion prevention of pipelines and a coating method thereof. The extrusion coating device comprises a wear-resistant elastic rubber layer and a hollow ball; the wear-resistant elastic rubber layer is arranged outside the hollow ball; a first ball, a second ball, a third ball and a fourth ball are the fixedly arranged in the hollow ball; the first ball and the second ball have a same weight and are symmetrically arranged in the hollow ball along the axis; and the third ball and the fourth ball have a same weight, and are arranged asymmetrically in the hollow ball. The coating method includes the steps of: first, a front extrusion coating device is sent into the pipeline, and the front extrusion coating device is powered by compressed gas to move forward for a distance; an anticorrosion coating is injected into the pipeline, and a rear extrusion coating device is sent into the pipeline after stop of feeding; and then the ...

Anti-disturbance liquid level monitor for water source well

The invention provides an anti-disturbance liquid level monitor for a water source well. The anti-disturbance liquid level monitor comprises a cable and a cable gland arranged outside the cable in a sleeving manner and used for protecting the cable, and also comprises a sheath; the sheath is connected with the cable gland through a connector; the bottom end of the sheath is connected with an anti-disturbance protective cover; a pressure testing device connected with the cable is arranged in the upper end of the anti-disturbance protective cover; pressure guiding holes are formed in the anti-disturbance protective cover along the circumferential direction. According to the anti-disturbance liquid level monitor for the water source well, the pressure guiding holes for guiding fluid are formed in the top end of the sheath so as to prevent fluctuation generated by pumping water through a submersible pump from disturbing the measuring accuracy for the underground water level; moreover, the anti-disturbance ...

Oil pumping unit at mouth of well

The invention belongs to the technical field of mechanical equipment for oil extraction in oil fields, and particularly provides an oil pumping unit at the mouth of a well. The oil pumping unit comprises a pumping rod as well as a switch reluctance machine, a speed reducer, a rotary disk, an eccentric shaft and a motor control cabinet, wherein one end of the switch reluctance machine is electrically connected with the motor control cabinet, and the other end thereof is connected with the rotary disk through a universal driving shaft; the eccentric shaft is arranged on the rotary disk; the pumping rod is connected with the eccentric shaft. By utilizing the advantages of the switch reluctance machine, the oil pumping unit at the mouth of the well removes belt drive and reduces the power transmission link to improve the transmission efficiency, and eliminates insufficient power when a three-phase asynchronous motor is used as an oil pumping unit, so as to achieve the purposes of energy conservation ...

Small-diameter long plunger processing device and processing method thereof

The invention discloses a small-diameter long plunger processing device and a processing method thereof, and belongs to the technical field of oil production engineering. A track underframe is fixed on the level ground through a ground screw; a tendency track is fixed on the track underframe through a bolt; a straightening block mechanism is mounted on the track underframe, positioned at the front ends of anti-shake guide wheels, and capable of moving along the tendency track; the anti-shake guide wheels are fixed on the track underframe; travelling sliding sleeves of the anti-shake guide wheels sleeve the tendency track in a clearance fit manner; a sliding base is positioned on the tendency track and can move frontwards and backwards along the tendency track; and a motor system is fixed on the sliding base and the tendency track is connected with a tailstock.

Real-time fault early warning method and system of oil well

The embodiment of the invention provides a real-time fault early warning method and system for an oil well. The method comprises the following steps of: obtaining a load and a displacement of an oil pumping rod; obtaining a polish rod indicator diagram according to variation rules of the load and the displacement of the oil pumping rod and time, and transforming the polish rod indicator diagram into a pump power diagram; pre-processing data points of the pump power diagram by adopting a polygonous approximation method, and filtering the data points which have little influence on the geometrical characteristics of the pump power diagram; carrying out normalized operation on the pump power diagram after being processed by the polygonous approximation method, establishing a vector chain of the pump power diagram, and comparing the vector chain with the vector chain in a standard fault vector chain warehouse; obtaining a judgment result on a working condition of the oil well according to a ...

Annular protective liquid for water injection well and application thereof

The invention relates to multifunctional annular protective liquid for a sleeve for injecting fresh water into an oil field or reinjecting sewage into well oil and application thereof. The annular protective liquid comprises the following components in percentage by weight: 0.1 to 2 percent of amine compound, 0.05 to 0.5 percent of composite phosphate, 0.02 to 0.1 percent of composite quaternary ammonium salt cationic surfactant, 0.01 to 0.02 percent of sulfite and the balance of water. The annular protective liquid is applied to corrosion prevention, scale prevention and sterilization of carbon steel pipe columns of a water injection well, wherein the using amount of a single well is 7 to 15 tons; and the using concentration is 1,000 to 5,000 mg/l. In the annular protective liquid, the corrosion inhibition rate is over 95 percent; the scale inhibition rate is over 90 percent; the sterilizing rate is 100 percent; the change rate of the volume, the hardness and tensile strength of a packer ...

Concentric electric underground measuring and adjusting instrument

The invention discloses a concentric electric underground measuring and adjusting instrument and belongs to the field of testing and allocation of oil field separate injection wells. The concentric electric underground measuring and adjusting instrument comprises an upper connector, a flow measurement and control device, an integrated control device, a power transfer mechanism, a positioning anti-rotation device, an electric adjusting device and a sheath. The flow measurement and control device is packaged in the instrument through the upper connector, meanwhile the integrated control device and the power transfer mechanism are sequentially packaged in the sheath from top to bottom, the upper portion of the sheath is connected with the flow measurement and control device, and the lower portion of the sheath is connected with the power transfer mechanism. The lower portion of the power transfer mechanism is connected with the positioning anti-rotation device, and the lower portion of the ...

Rapid electric sampling device for sectionalized production of horizontal well

The invention discloses a rapid electric sampling device for sectionalized production of a horizontal well, aiming to improve sampling efficiency of reservoir fluid of each subsection of the horizontal well. A righting ring of the sampling device is connected to a radial circular groove at the upper end of the peripheral face of a microcomputer controller, and the bottom end of the microcomputer controller is connected with an electric cavity. A sampling cylinder is connected with the bottom end of the electric cavity, and a radial liquid outlet hole and a sampling hole below the same are formed in the wall of the sampling cylinder. A connecting cylinder provided with a valve bonnet inside is connected with the bottom end of the sampling cylinder. A valve seat provided with a liquid inlet hole is connected with the bottom end of the connecting cylinder. An upper switching valve is arranged in the electric cavity. The top end of the upper switching valve is sequentially connected with a ...

Pulling device for tubular column of flexible composite oil tube

The invention discloses a pulling device for a tubular column of a flexible composite oil tube, which is designed for increasing the effective working efficiency of the tubular column of the flexible composite oil tube. The pulling device is mainly formed by a line pulling and releasing mechanism, a line arranging mechanism, a pulling mechanism and a wellhead righting mechanism, wherein the line arranging mechanism and the line pulling and releasing mechanism are used for arranging and winding of an oil tube, the pulling mechanism is used for controlling the moving of the oil tube, and the wellhead righting mechanism is used for ensuring that the oil tube is aligned to a wellhead and is smoothly pulled. According to the pulling device for the tubular column of the flexible composite oil tube, disclosed by the invention, the coordinate and consistent operation of components is maintained through the guiding of a pulley group and the frequency conversion control of a device, the pulling operation ...

Method for removing sulfate radical from injected water in oil field for anti-scaling

A method for removing sulfate radical from injected water in oil field for anti-scaling is applied in anti-scaling of oil fields and oil-water wells. The method is characterized by firstly pumping injected water into a coarse filtration system by a high-pressure pump for carrying out the coarse filtration treatment and then into a fine filtration system for treatment; and further pumping the injected water after the two-stage filtration by the coarse filtration system and the fine filtration system into a nanofiltration system for treatment. The injected water after the treatment is divided into clear water and condensed water. The clear water is directly re-injected to the underground target layer position. A ternary complex scale cleaning agent is added before the injected water enters the fine filtration system. The method has the effects that a nanofiltration film is adopted to remove sulfate ions in the injected water, thereby solving barium and strontium scales generated by incompatibility ...

Well field raw oil heating device, heating system and heating control method

The invention discloses a well field raw oil heating device, a heating system and a heating control method, and belongs to the field of automatic control. The device comprises a heat collector, a heat collecting water tank, a heat exchange water tank, a heat collecting circulation pump, a heating circulation pump, an electric heater, a sensor group, a control module and a power supply module, wherein the heat collecting water tank is used for storing solar energy collected by the heat collector, the heat exchange water tank is used for carrying out heat exchange with raw oil in an oil conveying pipeline, the heat collector and the heat collecting water tank are communicated through the heat collecting circulation pump, the heat collecting water tank and the heat exchange water tank are communicated through the heating circulation pump, the heat exchange water tank is arranged outside the oil conveying pipeline, the electric heater is arranged in the heat exchange water tank, the sensor ...

Sealing device for electric submersible reciprocating pump oil-production system

The invention relates to a sealing device for an electric submersible reciprocating pump oil-production system. The sealing device comprises an electric submersible reciprocating pump barrel, an oil well pump pull rod and a linear motor, wherein the upper end and the lower end of the linear motor are respectively encircled by an upper bellows and a lower bellows in a sealing manner, and an upper bellows protection pipe and a lower bellows protection pipe are respectively arranged outside the upper bellows and the lower bellows. The high elastic corrosion-resistant rubber bellows are adopted, so that the complete isolation of the motion part of the submersible linear motor and well fluid is realized. The bellows are filled with lubricating oil, so that a rotor shaft is always in a good lubricating state, and the fault-free working time of the electric submersible reciprocating pump oil-production system is ensured.

High-precision measuring method of separating characteristic of hot work separating device

The invention provides a high-precision measuring method of the separating characteristic of a hot work separating device, which gives consideration to the simple installation of a measuring structure, the safety and reliability of a measuring system and the high measuring precision. The uncertainty of the relative standard of the measuring system which is matched with the method is 0.184%. Compared with the conventional method, the measuring performance is more stable and the measuring precision is higher. The method not only can measure the displacement-time relationship, the separating time, the separating speed, the separating acceleration and the separating impulse of the hot work separating device with high precision, but also can be widely applied to measuring the motion characteristic of the motion parts of the other work done hot work product, and has good application foreground for accurately testing and researching the separating motion characteristic of the hot work separating ...

Capsule combination pump

The invention belongs to the technical field of oil extraction equipment of oil well machines and particularly relates to a capsule combination pump, which comprises a pump shell, wherein a capsule is arranged on the upper part in the pump shell, a plunger is arranged on the lower part of the pump shell, and the plunger is connected to a motor through a plunger connecting rod; the capsule is of a hollow structure and has elasticity, a liquid outlet is formed in the upper end of the capsule, a liquid inlet is formed in the lower end of the capsule, an upper traveling valve group is formed in the liquid outlet, a lower traveling valve group is formed in the liquid inlet, the liquid inlet is communicated with the outside of the pump shell, and an inner chamber of the pump is formed by communicating an annular space between the capsule and the pump shell and the space, in which the plunger is positioned. According to the capsule combination pump, the well liquid and the interior of the motor ...

Preparation method and application of flocculating agent

The invention discloses a preparation method and application of a flocculating agent. The preparation method comprises: (1) dropwise adding ammonium carbonate into an aluminium chloride solution with stirring to prepare an aluminium hydroxide hydrogel, and performing pumping filtration for reservation; (2) processing the aluminium hydroxide hydrogel prepared in the step (1), adding aluminium chloride, heating and reacting under the condition of 150-180 DEG C for 3-5 h; and (3) dissolving acrylamide monomer in an aqueous solution of HAD, placing in a polymerization bottle; vacuumizing and filling with nitrogen, adding a ceric ammonium nitrate solution into the polymerization bottle under the vacuum state, and shaking uniformly; then vacuumizing again and filling with a certain amount of nitrogen, then transferring the sealed polymerization bottle to a constant-temperature oven with a temperature of 40 DEG C, and reacting for 8-10 h; after polymerization is finished, taking out products, ...

Bridge type concentric intelligent testing and distributing layered injection device and technology

The invention discloses a bridge type concentric intelligent testing and distributing layered injection device which comprises a well testing vehicle (3), a cable (4), an oil pipe (8), a concentric electric testing and distributing instrument (10) and a bridge type integrated concentric water distributor (11). The well testing vehicle (3) is arranged on the ground outside a well, the oil pipe (8) is arranged in the well, and the concentric electric testing and distributing instrument (10) is arranged in the oil pipe (8). The bridge type integrated concentric water distributor (11) is arranged on the oil pipe (8), and the cable (4) is connected with the well testing vehicle (3) and the concentric electric testing and distributing instrument (10). The concentric electric testing and distributing instrument (10) can move in the oil pipe (8) and in the bridge type integrated concentric water distributor (11) under the drive of the cable (4). The invention further discloses a bridge type concentric ...

Balance control device and method for walking-beam type pumping unit

The invention discloses a balance control device and method for a walking-beam type pumping unit and belongs to the field of walking-beam type pumping units. The balance control device comprises a balance weight, a detection module, a control module and an executing module; the balance weight is capable of moving on a walking beam of the pumping unit in the lengthwise direction of the walking beam; the detection module is used for detecting operating current of a motor of the pumping unit on upper and lower strokes respectively; the control module is used for calculating electric power of the motor on the upper and lower strokes according to the operating current of the motor on the upper and lower strokes and judging whether the pumping unit is balanced or not, and when the pumping unit is unbalanced, moving direction and distance of the to-be-moved balance weight are determined according to the electric power of the motor on the upper and lower strokes; the executing module is used for ...

Intelligent detection method, intelligent detection device and intelligent detection system

The invention discloses an intelligent detection method, an intelligent detection device and an intelligent detection system. The method comprises the steps of receiving state information acquired by an oil well data acquisition platform, wherein the state information comprises oil pumping motor parameters acquired by a motor detection device in an oil well data acquisition system, loading data of an oil pumping rod acquired by a sensor in the oil well data acquisition system as well as displacement data of the oil pumping rod; determining a first indicator diagram according to the loading data of the oil pumping rod and the displacement data of the oil pumping rod; analyzing the first indicator diagram: if the first indicator diagram does not meet a preset standard, the sensor is detected to be damaged; if the first indicator diagram meets the preset standard, determining a second indicator diagram according to the oil pumping motor parameters and the displacement data of the oil pumping ...

Wellhead high-pressure-spraying agentia adding method and device for water injection wells

The invention discloses a wellhead high-pressure-spraying agentia adding method and device for water injection wells. The wellhead high-pressure-spraying agentia adding method and device are designed for fixed-point agentia adding for the single water injection well and unpowered agentia adding at a high-pressure wellhead, namely, one end of a negative-pressure generating cavity is connected with a pressure pipeline with a nozzle, the other end of the negative-pressure generating cavity is sequentially connected with a throat pipe, a diffuser and a discharge pipe, and two ends of an agentia adding pipeline are respectively connected with an agentia storage tank and the negative-pressure generating cavity. The wellhead high-pressure-spraying agentia adding method includes that an anti-corrosion coating layer is surfaced on the inner wall of the nozzle at first, then a spraying device is arranged at the wellhead, high-pressure fluid is input so as to enable the negative-pressure generating ...

Method for removing sulfate radical from injected water in oil field for anti-scaling

A method for removing sulfate radical from injected water in oil field for anti-scaling is applied in anti-scaling of oil fields and oil-water wells. The method is characterized by firstly pumping injected water into a coarse filtration system by a high-pressure pump for carrying out the coarse filtration treatment and then into a fine filtration system for treatment; and further pumping the injected water after the two-stage filtration by the coarse filtration system and the fine filtration system into a nanofiltration system for treatment. The injected water after the treatment is divided into clear water and condensed water. The clear water is directly re-injected to the underground target layer position. A ternary complex scale cleaning agent is added before the injected water enters the fine filtration system. The method has the effects that a nanofiltration film is adopted to remove sulfate ions in the injected water, thereby solving barium and strontium scales generated by incompatibility ...

Digital intelligent water distributor

The invention provides a digital intelligent water distributor which comprises an upper joint, a lower joint, a pressure monitor, a flow regulation system, a flow tester, a power supply device, a wireless communication system, a central control CPU system, an outer cylinder, a liquid flow channel, a sealing joint, a central pipe and a communication antenna, wherein the upper joint and the lower joint are connected with the central pipe to form the liquid flow channel; the upper joint is connected with the pressure monitor, the flow regulation system, the upper end of the flow tester, the wireless communication system and the central control CPU system; the lower joint is connected with the lower end of the flow tester, the power supply device, the sealing joint and the communication antenna; the upper end of the outer cylinder is connected with the upper joint and the lower end of the outer cylinder is connected with the sealing joint; a differential pressure sensor, a forward check valve ...

Intensity calibration method for ultra-high-strength sucker rod string

The invention belongs to the technical field of exploitation in an oil field, and particularly provides an intensity calibration method for an ultra-high-strength sucker rod string. The intensity calibration method comprises the following steps: (1) introducing parameters K and a on the basis of correcting a maximal allowable stress calculation formula of a goodman diagram sucker rod, and thus obtaining a new calculation model for the maximal allowable stress rhoa11 of a sucker rod; (2) determining the parameters T, K and a in the calculation model for the maximal allowable stress rhoa11 of the sucker rod in the step (1); (3) substituting the T, K and a determined in the step (2) into the calculation model for the maximal allowable stress rhoa11 of the sucker rod to obtain an intensity checking formula of the sucker rod; and (4) accounting and judging, wherein the maximal allowable stress rhomax of the sucker rod does not exceed the calculated maximal allowable stress rhoa11. The intensity ...

Reliability evaluation method for non-electric explosion propagation firer system

The invention discloses a reliability evaluation method for a non-electric explosion propagation firer system. The kind of non-electric explosion propagation system which is a complicated network system and does not belong to parallel connection or serial connection is evaluated by utilizing a thought of total probability formula, the reliability of this kind of complicated network system is evaluated according to the work reliability of different explosion propagation links, and the reliability of the non-electric explosion propagation system can be accurately calculated.

Sealed small low-impact release screw bolt

The invention relates to a sealed small low-impact release screw bolt. The bolt comprises an inner cylinder (1), a shear pin (2), a wedge block (3), a piston (4), a sealing ring (5), a double O-shaped ring sealed baffle (6) and an outer cylinder (7). The bolt is characterized by small size, sealing type, low impact, strong connection and no pollution. Before separated, the two polars of the connected body form strong connection; and when separated, the two polars of the connected body can be safely and fast separated and generate low impact disturbance, thus the bolt is a pyrotechnic connection separating device with good comprehensive performance, and can be directly used in the stage separating systems of the missile and other spacecrafts, also provide beneficial reference for the design of the similar separating mechanism, have good application prospect.

Crude oil loading-unlading electrostatic hazard warning device and control method

The invention discloses a crude oil loading-unlading electrostatic hazard warning device and control method and belongs to the field of electrostatic prevention. The device comprises an electrostatic content eliminating system, an electrostatic parameter feedback system and an electrostatic parameter control system, the electrostatic content eliminating system and the electrostatic parameter feedback system are both electrically connected with the electrostatic parameter control system, an oil storage tank is communicated with a delivery oil tank through the electrostatic content eliminating system, and the electrostatic parameter feedback system is electrically connected with the delivery oil tank. The method includes a first-level control command, a second-level control command and a third-level control command. Tank wall potential difference of the electrostatic parameter feedback system and potential of the crude oil liquid level in the delivery oil tank are fed back to the electrostatic ...

Long pipe surface thermal spraying device

The invention relates to a long pipe surface thermal spraying device applied to a pipe outside surface thermal spraying protective layer. A track is horizontally fixed on a bracket, a walking trolley is arranged on the track and a thermal spraying system is fixed on the walking trolley. Four to six cylinder-type lifting mechanisms are fixed on a supporting seat at one side of the track; one end of a supporting seat of the cylinder-type lifting mechanism is fixed with a clamping rotation mechanism. Each group of control mechanisms consists of two travel switches, an electric relay and a solenoid valve, and the control mechanisms are fixed on the track. The invention has the advantages of realizing of continuously automatic and efficient thermal spraying on the outside surface of a longer pipe and completely continuous and efficient spraying process, solving the problem of a spraying leakage point caused by the blocking of a bearing support point by using the cylinder-type lifting mechanism ...

Small-size quickly separated firer-unlocking bolt

The invention provides a small-size quickly separated firer-unlocking bolt. The small-size quickly separated firer-unlocking bolt comprises an unlocking bolt main body (1), a sealing ring (2) and a semiconductor bridge-type pressure cartridge case (3). In the small-size quickly separated firer-unlocking bolt, a semiconductor bridge firing element is adopted as a firer connection and separation mechanism of the firing element; the whole axial length of the small-size quickly separated firer-unlocking bolt is 60 to 65 millimeters, and the radial size is less than or equal to 16 millimeters; the separation time of the small-size quickly separated firer-unlocking bolt is 1.0 to 1.1 microseconds, the separation synchronism is 0.10 to 0.15 microseconds, and the connection bearing capacity is 21 to 25kN. The small-size quickly separated firer-unlocking bolt has the characteristics of small structural size, short separation time, high synchronism, low firing energy and the like; a safe, quick and ...

Pumping unit dragging motor energy-saving control equipment system

The invention discloses a pumping unit dragging motor energy-saving control equipment system which comprises a switch reluctance motor and an energy-saving controller. The energy-saving controller comprises an operation display circuit, a control circuit, a driving circuit and a power circuit. The operation display circuit is connected with the control circuit, and the control circuit is connected with the switch reluctance motor, the driving circuit and the power circuit. The driving circuit is connected with the power circuit. The power circuit is connected with the switch reluctance motor. The energy-saving controller adjusts the output power of the switch reluctance motor by adjusting the rotating speed of the switch reluctance motor. According to the system, motor energy consumption can be reduced, and motor efficiency can be improved.

Bridge type integrated concentric water distributor

The invention discloses a bridge type integrated concentric water distributor, and belongs to the field of oilfield flooding. The bridge type integrated concentric water distributor comprises an upper connector, a main cylinder, a movable cylinder, a fixed seat and a lower connector; the main cylinder comprises an adjusting section and a locating section, the adjusting section is provided with water injection holes and bridge type through holes, and the locating section is provided with a plurality of water passing cuts communicated with the corresponding bridge type through holes; the movable cylinder and the main cylinder have the same axis; a movable water nozzle is fixed to the movable cylinder, adjustment of the water injection amount can be achieved just by rotating the movable cylinder, the adjusting accuracy is high, and workload is reduced; the fixed seat is provided with a center through hole communicated with the movable cylinder; the fixed seat is provided with an overflowing ...

Metalloid flexible composite continuous pipe

The invention belongs to the technical field of mechanical oil extraction, and in particular provides a metalloid flexible composite continuous pipe. The pipe comprises a protective layer, a reinforcing layer, a pull resistant layer and steel wire ropes, wherein the protective layer, the reinforcing layer and the pull resistant layer are successively arranged from outer to inner, and the steel wire ropes are distributed around the outside of the reinforcing layer. The metalloid flexible composite continuous pipe disclosed by the invention has the characteristics that the flexibility of plastic materials is good, the corrosion resistance is strong, the heat conductivity coefficient is low, the metalloid flexible composite continuous pipe can make up insufficiencies of a metal continuous oil pipe and achieve most of properties of the continuous oil pipe, and the application range of the continuous oil pipe is extended; in addition, the metalloid flexible composite continuous pipe can be connected ...

High-precision measuring method of separating characteristic of hot work separating device

The invention provides a high-precision measuring method of the separating characteristic of a hot work separating device, which gives consideration to the simple installation of a measuring structure, the safety and reliability of a measuring system and the high measuring precision. The uncertainty of the relative standard of the measuring system which is matched with the method is 0.184%. Compared with the conventional method, the measuring performance is more stable and the measuring precision is higher. The method not only can measure the displacement-time relationship, the separating time, the separating speed, the separating acceleration and the separating impulse of the hot work separating device with high precision, but also can be widely applied to measuring the motion characteristic of the motion parts of the other work done hot work product, and has good application foreground for accurately testing and researching the separating motion characteristic of the hot work separating ...

Air sealing device for wellhead of rodless producing well

The invention belongs to the technical field of mechanical devices for wellheads of rodless producing wells, and specifically provides an air sealing device for a wellhead of a rodless producing well. The device comprises a pipe casing three joint, a double male short joint which is arranged in the pipe casing three joint by sleeving manner, a lower flange arranged at the upper end of the pipe casing three joint, and an upper flange arranged at the upper end of the double male short joint; the lower flange and the upper flange are fixed through a bolt and a nut; a cable connector body is arranged on the side surface of the upper flange; a sealing clamping block is arranged in the upper end of the cable connector body; a pressing pad ring is arranged at the upper part of the sealing clamping block; a pressing cap is in threaded connection with the top part of the cable connector body. According to the device, a cable wire is clamped through the sealing clamping block, gaps suffering from ...

Nonmetallic flexible composite continuous pipe oil extraction device

The invention belongs to the technical field of mechanical oil extraction, and particularly provides a nonmetallic flexible composite continuous pipe oil extraction device which comprises a wellhead hanger, a conversion joint, an oil pump, a screen pipe and a screwed plug. The conversion joint, the oil pump, the screen pipe and the screwed plug are connected sequentially from top to bottom. The oil pump is connected with the wellhead hanger through an oil pumping rod, a nonmetallic composite pipe is connected between the wellhead hanger and the conversion joint, and the oil pumping rod penetrates the inside of the nonmetallic composite pipe. A metal oil pipe is replaced by the nonmetallic composite pipe, so that construction workload is lowered substantially, labor intensity of construction personnel is lowered, anticorrosion capability of a pipe column is improved, normal production time is increased, and production pipe column structure is simplified.

Miniature detonator in structure with optimum charging height

The invention relates to a miniature detonator in a structure with optimum charging height, comprising a primary explosive (1), a high explosive (2) and a shell (3). The charging diameter is 0.5 to 2 mm, the total charging height is 2 to 5 mm, the selection of the charging height of each layer corresponds to output power maximum, the charging height ratio of the primary explosive to the high explosive corresponding to the output power maximum is 0.6 to 2, and the output power maximum is the range of output detonation pressure corresponding to 95% to 100% of maximum detonation pressure value, wherein the range of the charging height ratio of the primary explosive to the high explosive corresponding to the output power maximum is obtained in the following method: under the conditions that the charging diameter of a fixed detonator is 0.5 to 2 mm and the total charging height is 2 to 5 mm, a detonator sample with different height ratios is prepared through changing the height ratio charging ...

Online method for measuring oil density in oil containing sewage and device thereof

The invention discloses the online measuring the oil concentration of the sewage and its equipment. The method adopts the ultrasonic emulsification oil-water mixture and uses the optical nephelo method to test the oil concentration. The equipment comprises the measuring section vertically put on the sewage pipeline, the ultrasonic oscillator set at the input and the output ends of the measuring section; three pairs of white gem windows transmitting beams set at the outside pipe wall, and the windows arrange in 120 Deg angle mutually; three groups of photoelectric converters are set corresponding to the windows; connect the industrial controller with a displayer through the signal receiver and the amplifier. When the sewage flows through the test section, the ultrasonic oscillator emulsificates the sewage and mixes it evenly; the testing beam is the violet beam with fixed wavelength; the photoelectric converter converses the optical signal into the electric signal and the optical nephelometer ...

Medicine dosing and adding apparatus used for oilfield wastewater treatment, and medicine dosing and adding method

The invention discloses a medicine dosing and adding apparatus used for oilfield wastewater treatment, and a medicine dosing and adding method, and belongs to the field of oilfield wastewater treatment. The medicine dosing and adding apparatus used for oilfield wastewater treatment is arranged in a medicine dosing tank, and comprises a motor, a transmission shaft, a centrifugal pump, pipelines 1-3 and valves A to B. The steps of medicine dosing and adding method are shown in the specification. Medicine preparation and medicine addition share the centrifugal pump in the embodiment of the invention, so power and space are effectively saved; the centrifugal pump arranged at the lower portion of the medicine dosing tank is used to realize the waterpower cycle stirring of the medicine, so non-uniform stirring caused by sedimentation of the medicine in the stirring process can be avoided; and the valve A and the valve B are adjusted to realize the synchronous implementation of medicine adding ...

Solid plunger oil production tubing string

The invention discloses a solid plunger oil production tubing string, which is designed for improving the oil well pump efficiency and the system efficiency of low-productivity oil wells. The lower end of an oil tube of the tubing string is downwards connected with a slide sleeve oil drain device and a solid plunger oil well pump in sequence; the lower end of the oil well pump is connected with a laser slotting centrifugal reverse flow type spiral gas anchor through an oil tube; and the lower end of the spiral gas anchor is connected with a lower plug through an oil tube. An oil flow runner of a conventional oil production tubing string is changed, so that crude oil does not flow in a plunger pump, the valve ball diameter is increased, an oil inlet runner is enlarged, the oil inlet resistance is reduced, the energy consumption is reduced, and the oil production processing index and the mechanical production system efficiency are remarkably improved.

Object falling prevention device of horizontal well

The invention discloses an object falling prevention device of a horizontal well, which is designed for preventing an oil pumping tubular column from being broken off and falling into a well and preventing accidents of overhauling and the like from happening. The object falling prevention device is characterized in that the bottom end of the inner wall of an upper connector is connected with a rubber cylinder shaft, a buffer rubber cylinder is arranged on the rubber cylinder shaft in a sleeving way, an outer convex plate of the bottom end of the rubber cylinder shaft is connected with the upper end surface of a cylinder body in a fastening way, and the bottom end of the outer wall of the cylinder body is connected with a lower connector; the inner wall of the lower connector is connected with a base tube, an expansion rubber cylinder and a movable baffle ring are arranged on the base tube in a sleeving manner, and the movable baffle ring is fixedly arranged on the base tube by dowels. During ...

Double-flow well test analysis method and double-flow well test analysis system on basis of indicator diagrams

The invention discloses a double-flow well test analysis method and a double-flow well test analysis system on the basis of indicator diagrams. The double-flow well test analysis method includes measuring surface casing pressures and loads and displacement of sucker rods of oil sucking machines, and collecting and acquiring load and time curves and displacement and time curves; generating time-varying polished rod indicator diagrams of the load capacity and the displacement of the sucker rods according to the load and time curves and the displacement and time curves; acquiring pump indicator diagrams according to the polished rod indicator diagrams; building working fluid level computation mathematical models according to the pump indicator diagrams and acquiring working fluid level data of oil wells; acquiring sand face pressure data according to the working fluid level data of the oil wells and the surface casing pressures in working systems by means of computation; adjusting parameters ...

Downhole ray type water content monitor

The invention particularly provides a downhole ray type water content monitor which comprises a shell. The upper end and the lower end of the shell are provided with an upper connector and a lower connector respectively. A central passageway vertically penetrates through the shell. A radioactive source installation base, a radioactive source, a transmission detector, a scattering detector, a circuit board and a battery pack are arranged between the shell and the central passageway. The radioactive source is installed on the radioactive source installation base obliquely. The transmission detector is arranged on a light ray circuit of the radioactive source and located on the side opposite to the radioactive source. The scattering detector is arranged above the radioactive source, and the included angle between the scattering detector and the light ray circuit of the radioactive source is 90 degrees. The battery pack is installed at the lower end of the shell. The circuit board is arranged ...

Method for monitoring efficiency of rod oil pumping system in real time

The invention relates to a method for monitoring the efficiency of a rod oil pumping system in real time and belongs to the technical field of computer oil field digitalization construction. The method comprises the steps of data collection and the step of data analysis. The step of data collection comprises the following steps that an oil pumping machine indicator diagram method oil well automatic metering and monitoring system is established, the operation states of oil wells in a supervision section are monitored in real time in all weather without interruption, indicator diagram data are collected every ten minutes, and the liquid production capacity is calculated; an electrical parameter data collecting system is established, the parameters such as three-phase current, voltage, active power, reactive power and power factors are collected in real time, and the mass data collected in real time are stored in a special database. The step of data analysis comprises the following steps that ...

Oil field centralized fracturing waste water treatment system

The invention discloses an oil field centralized fracturing waste water treatment system, which belongs to the field of low-permeability oil field development. The oil field centralized fracturing waste water treatment system is used for oil field fracturing flow back waste water treatment and at least comprises a fracturing flow back liquid storage pool, a water treatment system pipeline, a chemical dispensing and adding system pipeline, a sludge discharge system pipeline, relevant branch pipelines, relevant equipment, relevant valves, instruments and relevant circuits, wherein a waste water lifting pump, a pipeline mixer, a coagulation sedimentation tank, a water transfer pump, a middle water tank, a filtering pressurizing pump, a filter bag type filter, a filter core type filter, a sterilization device, a purified water tank, relevant valves and relevant instruments are sequentially connected onto the fracturing waste water treatment pipeline in the fracturing waste water flowing direction ...

Polishing device for coating in oil pipe

The invention discloses a polishing device for coating in an oil pipe, and the polishing device is designed for automatically polishing the coating on the inner wall of the oil pipe. A transverse plate is fixed above a bracket of the device, the transverse plate is provided with a baffle at the end, the baffle is connected with a walking car arranged on the transverse plate through an air cylinder, the other side of the walking car is connected with a clamp through a connection rod, the clamp is connected with an elastic polishing sand ball or packing leather through a bolt. The device is used for polishing the coating on the inner wall of the oil pipe and thoroughly removing the not melted particles adhered on the coating, the surface of the coating is smooth and flat, the degree of automation is high and the operation is convenient.

Online method for measuring oil density in oil containing sewage and device thereof

Microbial composition for degrading chlorine-containing polycyclic aromatic hydrocarbon in oily sludge and treatment method utilizing same

The invention discloses a microbial composition for degrading chlorine-containing polycyclic aromatic hydrocarbon in oily sludge and a treatment method utilizing the same. The microbial composition comprises sphingomonas paucimobilis, sphingomonas yanoikuyae and oligotrophic cycloclasticus in a weight ratio of 1:(0.5-1.5):(0.5-1.5). The invention also provides a treatment method for polluted oil by using the microbial composition for degrading the chlorine-containing polycyclic aromatic hydrocarbon in the oily sludge. The method comprises a step as follows: a microbial agent and a nutrient solution are added to the oily sludge, wherein the oil ratio after treatment is smaller than 0.5%. Aiming at degrading polycyclic aromatic hydrocarbon and heterocycle substances, three microorganisms with significant effects on the environmental toxic substance are separated and cultivated, the required necessary nutrients of the microorganisms for playing the degradation activity are researched, and ...

Centralized treatment process of oil field fracturing wastewater

The present invention discloses a centralized treatment process of oil field fracturing wastewater, belonging to the field of development of low permeability oil fields. The process at least comprises: 1) removing impurities; 2) sampling and determining agent addition dosage; 3) adding agents; 4) mixing with stirring; 5) standing and settling; 6) filtrating and sterilizing; and 7) filter-pressing. The equipment and facilities used in fracturing wastewater treatment are arranged with a skid-mounted structure, wastewater from each well site is transported by a pipeline through custody transfer, so that centralized treatment and unified deployment of fracturing wastewater are achieved. According to the treatment process, the limitation of single-point distributed treatment of fracturing wastewater is effectively resolved, and the treatment efficiency of wastewater is substantially improved; the input cost of fracturing wastewater is substantially decreased, and the reuse performance is improved ...

Long pipe surface thermal spraying device

The invention relates to a long pipe surface thermal spraying device applied to a pipe outside surface thermal spraying protective layer. A track is horizontally fixed on a bracket, a walking trolley is arranged on the track and a thermal spraying system is fixed on the walking trolley. Four to six cylinder-type lifting mechanisms are fixed on a supporting seat at one side of the track; one end of a supporting seat of the cylinder-type lifting mechanism is fixed with a clamping rotation mechanism. Each group of control mechanisms consists of two travel switches, an electric relay and a solenoid valve, and the control mechanisms are fixed on the track. The invention has the advantages of realizing of continuously automatic and efficient thermal spraying on the outside surface of a longer pipe and completely continuous and efficient spraying process, solving the problem of a spraying leakage point caused by the blocking of a bearing support point by using the cylinder-type lifting mechanism ...

Layer mining anti-gas pump for pumping well

The invention relates to a layer mining anti-gas pump for a pumping well, which is used for layer mining of oil in multilayer oilfield series. The layer mining anti-gas pump comprises an upper pump barrel assembly, a lower pump barrel assembly and a plunger assembly, wherein the lower end of a collar of an upper pump barrel is connected with the top end of the upper pump barrel, a gas barrel is fixed on the outer wall of the upper pump barrel, the wall of the upper pump barrel is provided with a gas hole, and the position of the gas hole is opposite to an annular space; the lower end of the upper pump barrel is connected with an upper pump joint; the lower end of an outer tube is connected with the upper end of a bridge joint; the lower end of the bridge joint is connected with a lower fixed valve, and the lower end of the lower fixed valve is connected with a lower joint; the upper end of the bridge joint is provided with an upper fixed valve, and the upper end of the upper fixed valve ...

Bridge crossing type inverted pull-drown pump

The invention discloses a bridge crossing type inverted pull-drown pump, which is designed for eliminating the eccentric wear and improving the system efficiency by fitting a rodless oil extracting device of an underground linear motor. The pull-down pump mainly comprises an oil outlet valve, a sieve pipe, an upper outer pipe, a reducing joint, a lower outer pipe and the like, wherein a bridge type inner pipe, with the lower end connected to an upper pump cylinder, is fixed in a bridge type outer pipe; an upper plunger is arranged in the upper pump cylinder; upper and lower mobile oil inlet valves are connected into the upper plunger; and the bottom end of the lower mobile oil inlet valve is in threaded connection with a lower plunger. The pull-down pump is combined with the underground linear motor for constructing to realize the oil extraction without needing a sucker rod, so that the problem of incapability of eliminating the eccentric wear of the sucker rod in a directional well is ...

Two-way passageway check valve and method for conducting sand-flushing through the same

The invention provides a two-way passageway check valve and a method for conducting sand-flushing through the two-way passageway check valve. The two-way passageway check valve is connected between a rotating jetting sand flushing device and an oil pipe. An upper connector used for being connected with the rotating jetting sand flushing device is arranged at the upper end of the two-way passageway check valve, and a lower connector used for being connected with the oil pipe is arranged at the lower end of the two-way passageway check valve. A diversion passageway is arranged in the upper connector. A forward passageway is arranged at the inner upper end of the lower connector, and a reverse passageway is arranged in the inner lower end of the lower connector. A valve ball and a spring are arranged in the reverse passageway. Compared with an existing liquid backflow passageway oil sleeve annulus, the passageway section is obviously narrowed, the liquid backflow speed is obviously increased ...

Down hole gas collection device

The invention discloses a down hole gas collection device which is designed for achieving the function of collecting gas down hole. An outer gas collection pipe of the gas collection device is fixed inside a bushing pipe by packers; the pipe wall of the outer gas collection pipe below the packer is provided with a small hole; the pipe wall of the outer gas collection pipe above the packer is provided with an oil jacket communicating hole; a spiral inner gas collection pipe is installed inside the outer gas collection pipe; the top portion inside the outer gas collection pipe is a cone-shaped gas collection chamber; the top end of the gas collection chamber is connected with an oil-gas mixed pump. The gas collection device collects all associated gas into the upper portion of the gas collection chamber by the settling separation effect; the oil-gas mixed pump is used for pumping the associated gas and the crude oil into the production pipeline for outer transportation, wherein the gas energy ...

Electric direct reading and examining seal system for dispersing pipe column and application method of system

The invention discloses an electric direct reading and examining seal system for a dispersing pipe column and an application method of the system, and belongs to the field of testing on separate injection well. The system comprises a direct reading type data acquiring and processing system, an examining seal controller, a cable winch, a cable, a blowout preventer, a packer, a water distributor, and an electric direct reading and examining seal device, wherein the electric direct reading and examining seal device at least comprises a centralizer, a magnetic positioning device, an integrated control device, a pressure data acquisition device, a motor, a locating detent, a sealing packing cup and a guiding taper. The direct reading type data acquiring and processing system is used for directly displaying underground oil pipes and formation pressure in real time, and whether the dispersing pipe column is effectively sealed can be accurately judged; the electric direct reading and examining ...

Blocking remover and blocking removal method for corrosion sulfate compound scale

The invention discloses a blocking remover and a blocking removal method for corrosion sulfate scale. The blocking remover comprises a pretreating agent, main liquid and protective liquid. The blocking removal method comprises the following steps: firstly, adding the pretreating agent after completely washing a shaft, performing shut-in reaction for 2 hours, then, performing backwashing on the shaft with high flow rate, and further squeezing the main liquid of the blocking remover according to the flow rate of 300-500L/min; next, squeezing the protective liquid after squeezing all the main liquid, performing shut-in reaction for 24 hours, and observing pressure variation; finally, completing and injecting. The blocking remover and the blocking removal method can solve blocking caused by organics, such as colloid and asphaltene, and blocking caused by calcium scale, in the shaft and the near-shaft area, can unblock the shaft and ground channels, simultaneously, clear barium and strontium ...

Multistage separated-layer water injection pipe column and working method thereof

The invention discloses a multistage separated-layer water injection pipe column and a working method thereof, which are designed for improving the test debugging success rate and the efficiency of a water distributor. The pipe column comprises each stage of a bridge type concentric water distributor, a preset working cylinder, a double-acting valve, a screen pipe and a screw plug connected through oil pipes in sequence and separated by packers for gradually unblocking each state. The pipe column realizes the gradual unblocking of the packers and the center channel water distribution operation mode of the water distributors through such process steps as connection of the pipe column into a well, sealing of the packers, water injection, seal examination, adjustment of separated-layer water injection quantity and well washing. The gradual unblocking of the multiple packers from top to bottom can be realized; the difficulties of high drilling load and high operation risk in a conventional ...

Nonmetal pipe submersible screw pump oil extraction device

The invention discloses a nonmetal pipe submersible screw pump oil extraction device which is designed for increasing the anti-corrosion ability and extending the service life of the pipe string. A wellhead hanger and an adapter of the device are connected inside a nonmetal pipe by means of vulcanization; an oil drain device, a screw pump, a shaft coupler, a protector, a drive motor, and a power cable which is connected with a ground controller are sequentially connected below the adapter. The device uses the nonmetal pipe as a liquid conveying channel of the submersible screw pump, thus preferably solving the problem of corrosion to metal pipes caused by the well fluid, and extending the working life of the pipe string down hole. The nonmetal pipe is able to meet the requirements of tensile resistance and internal pressure resistance; the nonmetal pipe can be continuously put into the well or pulled out of the well, thus reducing the labor intensity of the operating staff. The vulcanization ...

Water injection well downhole power generation system and method

The invention discloses a water injection well downhole power generation system and method, and belongs to the technical field of water injection well downhole dynamic power generation. An upper joint and a lower joint are used for connecting layered water injection pipelines, a power generation device is mounted in a sheath, the sheath is connected with the upper joint and the lower joint in a threaded manner, three sleeves are parallelly mounted in the sheath and sealed, each sleeve comprises a sealing ring, a pressing cap, a bearing, a generator coil, a permanent magnet rotor, a generator shaft, a water inlet, a water outlet, a turbine, a turbine shaft, a clamp spring and a permanent magnetic coupling, a turbine system is placed in the middle sleeve which is an eccentric sleeve, an axial circular hole is formed in a thick end of the middle sleeve and used for holding the turbine and the turbine shaft, two inclined holes are formed in the upper end and the lower end of the middle sleeve ...

Mechanical pressure display constant-pressure release valve

The invention provides a mechanical pressure display constant-pressure release valve. The release valve comprises a pressure regulating valve seat, a pressure spring and a valve rod, wherein the pressure spring is arranged in the pressure regulating valve seat in the axial direction, one end of the valve rod is connected with the pressure spring, the other end of the valve rod extends out of the pressure regulating valve seat, a scale sleeve sleeves the outer surface of the pressure regulating valve seat, a pressure regulating cap which can move in the axial direction of the scale sleeve sleeves the outer surface of the scale sleeve, and the tail end of the valve rod is fixedly connected with the pressure regulating cap; identifying lines are formed in the scale sleeve; calibration lines for calibrating the mounting position of the scale sleeve are formed in the pressure regulating valve seat. The displacement and the pressure of the pressure spring are changed by rotating and adjusting ...

Water supply well is carrier wave liquid level monitor in pit

The utility model provides a water supply well is carrier wave liquid level monitor in pit belongs to oil field water source well production monitoring technology field. The lower extreme female connection center tube upper end of top connection is on the threaded connection sheath of top connection, at the annular space of sheath with the center tube, the carrier signal transmitter passes through the fix with screw at the center tube middle part, the female connection center tube lower extreme of lower clutch, the thread connection sheath lower extreme of lower clutch, temperature pressure sensor fixes the up end at the lower clutch, and the lower clutch is equipped with 3 wire guides. Can satisfy the monitoring of water supply well production sound attitude water level, reduce the special signal cable of traditional liquid level monitor, improve the efficiency of construction, can prolong the latent pump life of water supply well electricity, reduce cost.

Method for biologically inhibiting production of secondary hydrogen sulfide from sulfate reducing bacteria in crude oil gathering and transporting system

The invention relates to a method for biologically inhibiting the production of secondary hydrogen sulfide from sulfate reducing bacteria in a crude oil gathering and transporting system. In the method, (1) a biological inhibitor for inhibiting a single well consists of 50 mg/L sodium nitrite and 20 mg/L sodium borate; (2) the biological inhibitor for inhibiting an oil transfer station consists of 40 to 60 mg/L sodium nitrite, 25 milligrams of humic acid, 10 to 20 mg/L sodium borate and 20 to 30 mg/L sodium hydroxide electrolyte; and (3) the biological inhibitor for inhibiting a combined station consists of 40 to 60 mg/L sodium nitrite, 25 milligrams of humic acid, 10 to 20 mg/L sodium borate, 20 to 30 mg/L sodium hydroxide electrolyte and 95 mg/L glutaraldehyde bactericide. In the method, the generation of the hydrogen sulfide is controlled at the source, and the method has the characteristics of long hydrogen sulfide inhibition time, low cost and no secondary pollutions and improvesthe ...

Method and system for diagnosing faults of pumping unit

The invention discloses a method and system for diagnosing faults of a pumping unit, and belongs to the field of oil exploitation. The method includes the steps of obtaining power data of a driving motor, analyzing the power data according to a wavelet function to obtain signals of the pumping unit, and diagnosing the faults of the pumping unit according to the signals. The system comprises a power data obtaining module and a diagnosing module, wherein the power data obtaining module is used of obtaining the power data of the driving motor and sending the power data to the diagnosing module, and the diagnosing module is used for analyzing the power data sent by the power data obtaining module according to the wavelet function to obtain the signals of the pumping unit and diagnosing the faults of the pumping unit according to the signals. By means of the technical scheme, the power data are analyzed according to the wavelet function to obtain the signals of the pumping unit, fault diagnosing ...

Well water level monitoring technique pipe for deep well water sources

The invention discloses a well water level monitoring technique pipe for deep well water sources. The well water level monitoring technique pipe is designed in order to monitor static and dynamic production water level of a water source well and improve operating efficiency of the water source well. The upper end of a lifting sub of the technique pipe is connected with water source well wellhead equipment, the lower end of the lifting sub is connected with an oil pipe, the lower end of the oil pipe is connected with a crossover coupling, the lower end of the crossover coupling is connected with a water level transmission device, and the lower end of the water level transmission device is connected with another oil pipe which is connected with an electric submersible pump; a data transmission line connected with the signal output end of the water level monitoring transmission device is clamped on an oil pipe coupling through a limiting clamp, and the upper end of the transmission line penetrates ...