Oil soluble cationic broad-spectrum temporary blocking agent in use for drilling fluid

This invention relates to an oil-soluble cationic broad-spectrum temporary blocking agent for well drilling fluid. The oil-soluble cationic broad-spectrum temporary blocking agent comprises: oil-soluble materials 50-74%, SBS triblock copolymer 0.2-0.44%, epoxypropylbenzyl di(stearamide ethyl) ammonium salt 0.50-0.89%, cationic surfactant imidazoline 0.62-0.96%, dibenzyl-di(stearamide ethyl) ammonium salt 0.62-0.96%, carboxymethyl cellulose or hydroxyethyl cellulose 0.17-0.84$, CaCl2 0.2-0.25%, and water as balance. The oil-soluble materials include residue asphalt (softening point = 51-55 deg.C), semi-oxidized asphalt (softening point = 57-65 deg.C), ethylene pyrolysis coal tar pitch (softening point = 47-52 deg.C), propane-removed asphalt (softening point = 70-77 deg.C), extracted asphalt (softening point = 105-120 deg.C), and 100# heavy oil asphalt (softening point = 47-54 deg.C) at a weight ratio of 1:(1.88-2.5):(1.25-1.88):(3.12-3.75):(2.5-3.12):(1.5-2). The oil-soluble cationic broad-spectrum ...

Strong wall-building composite plugging agent

The invention relates to a strong wall-building composite plugging agent, which is applied to plugging of an oilfield void well, a cracked stratum, a loss well and a casing-damaged leakage well. The composite plugging agent comprises the following components: 0.1 to 2.0 percent of natural branch-chain fiber, 0.1 to 2.0 percent of synthetic straight-chain fiber, 50 to 80 percent of oil-well cement, 5.0 to 30.0 percent of superfine cement and 5.0 to 30.0 percent of silicon dust or/and 0.01 to 2.0 percent of retarding agent, wherein the natural branch-chain fiber is dried cotton fiber from which seeds and husks are removed, and the water content thereof is less than or equal to 0.1 percent; the synthetic straight-chain fiber is synthetic polypropylene fiber, the water content is less than or equal to 0.1 percent, the diameter of single filaments is 0.05 to 0.5 millimeters, and the length is 5 to 50 millimeters; and the retarding agent is calcium lignosulphonate. The composite plugging agent ...

Oil soluble cationic broad-spectrum temporary blocking agent in use for drilling fluid

Method for treating waste water for oil field tertiary oil production prepared polymer solution

Strong wall-building composite plugging agent

The invention relates to a strong wall-building composite plugging agent, which is applied to plugging of an oilfield void well, a cracked stratum, a loss well and a casing-damaged leakage well. The composite plugging agent comprises the following components: 0.1 to 2.0 percent of natural branch-chain fiber, 0.1 to 2.0 percent of synthetic straight-chain fiber, 50 to 80 percent of oil-well cement, 5.0 to 30.0 percent of superfine cement and 5.0 to 30.0 percent of silicon dust or/and 0.01 to 2.0 percent of retarding agent, wherein the natural branch-chain fiber is dried cotton fiber from whichseeds and husks are removed, and the water content thereof is less than or equal to 0.1 percent; the synthetic straight-chain fiber is synthetic polypropylene fiber, the water content is less than orequal to 0.1 percent, the diameter of single filaments is 0.05 to 0.5 millimeters, and the length is 5 to 50 millimeters; and the retarding agent is calcium lignosulphonate. The composite plugging agent ...

Preparation method of drilling core containing acid liquor indicator

The invention relates to a preparation method of drilling core containing acid liquor indicator, which comprises the following components as calculated by the total weight 100% of the drilling core: 14% of epoxy resin, 2% of quadrol, 2% of acetone and 1% of methyl red. The preparation method has the following steps: mixing the above components; weighting the rock waste raw materal accounting for 14% of the total weight of the drilling core, and washing an performing oil treatment on the raw material by petroleum ether; drying for 3h under the temperature of 95 DEG C, cooling and adding 1% crystal violet; stirring a cementing agent with the rock waste raw material evenly, placing the mixture in a die and pressurizing by 7MPa-10MPa for 12h; and dismantling the die, drying the drilling core for 6h at the temperature of 95 DEG C, and naturally cooling to room temperature. The permeability, water sensitivity, salt sensitivity, velocity sensitivity, acid sensitivity and alkali sensitivity of ...

High solid phase drilling fluid filter cake removal treating fluid

A high solid phase drilling fluid filter cake removal treating fluid is applied to the technical field of petroleum drilling and completion. The invention comprises three treating fluids, namely cleaning breaking liquid, dissolution breaking liquid and post cleaning liquid; the cleaning breaking liquid comprises the following components: dimethylbenzene, petroleum ether, nonylphenol polyoxyethylene ether (OP-4), nonylphenol polyoxyethylene ether (OP-10), 8-10 alcohol polyoxyethylene ether, ammonium persulphate, potassium chloride and water; the dissolution breaking liquid comprises the following components: acetic acid, hydrochloric acid, hydrofluoric acid, inhibiter SA1-3, ammonium citrate and water; the post cleaning liquid comprises the following components: dimethylbenzene, petroleum ether, nonylphenol polyoxyethylene ether (OP-4), nonylphenol polyoxyethylene ether (OP-10), 8-10 alcohol polyoxyethylene ether, potassium chloride and water. By cleaning breaking, dissolution breaking and ...

Holder for high-temperature high-pressure glass microscopic model

Method and device for acquiring transmission data

The invention discloses a method and a device for acquiring transmission data, which are used for solving the problem of the prior art that the accuracy of acquiring data of underground parameters is poor. The method comprises the following steps: carrying out relevant operation on a first signal received by a receiving terminal and a second signal generated locally through the receiving terminal, wherein the first signal consists of an identification signal and data, and the second signal consists of a plurality of identification signals; determining the position of the identification signalin the first signal according to the result of the relevant operation; determining the time of receiving the first signal according to the position of the identification signal; and acquiring the data in the first signal according to the time of receiving the first signal. The scheme provided by the invention can effectively improve the accuracy of acquiring the data transmitted by a sending terminal ...

Method for confirming oxygen consuming content and oxygen consumption rate of oil pool microorganisms

The invention relates to a method for confirming oxygen consuming content and oxygen consumption rate of oil pool microorganisms, comprising the following steps: (1) injecting oil well produced water or oil well injected water containing 0.5-5 percent of nutrient components into a culture vessel by a displacement pump; (2) supplementing the culture vessel with oxygen or air, wherein the volume of the air flow is 1-5 times of that of the water sample; (3) culturing the water sample by simulating the oil pool temperature of 45-80 DEG C and the pressure of 10-20MPa for 5-30 days; (4) taking the water sample for analyzing density counting and community structure of flora; and (5) taking air sample for gas chromatography and calculating the consuming content of the oxygen by combing with the flora counting and analyzing result. The method can confirm the amount of oxygen needed by oil pool microorganisms for effective growth and propagation in different conditions to further calculate the total ...

Composite microorganism oil-displacing agent

The invention relates to a composite microorganism oil-displacing agent for improving the oil recovery rate. The composite microorganism oil-displacing agent is prepared by adding mixed liquid containing 1-8 percent of byproducts of triticeae crops, 1-8 percent of byproducts of maize, 0.5-6 percent of byproducts of wood and the balanced of water by weight into 5-10mg/L trace element and 300-500mg/L polyacrylamide, wherein the particle diameters of the byproducts of crops and wood are smaller than 0.5 mm. The composite microorganism oil-displacing agent is filled with the aid of oxygen-containing air, has dual functions of providing nutrition for microorganism and plugging a high permeability zone, can enlarge the swept volume of nutrient fluid and the fermentation range of the microorganism, prolong the acting time between the microorganism and rock and fluid in an oil layer, satisfy the requirement for fermentation time, provide conditions for biological action and biochemical action and ...

Preparation method of drilling core containing acid liquor indicator

The invention relates to a preparation method of drilling core containing acid liquor indicator, which comprises the following components as calculated by the total weight 100% of the drilling core: 14% of epoxy resin, 2% of quadrol, 2% of acetone and 1% of methyl red. The preparation method has the following steps: mixing the above components; weighting the rock waste raw material accounting for 14% of the total weight of the drilling core, and washing an performing oil treatment on the raw material by petroleum ether; drying for 3h under the temperature of 95 DEG C, cooling and adding 1% crystal violet; stirring a cementing agent with the rock waste raw material evenly, placing the mixture in a die and pressurizing by 7Mpa-10Mpa for 12h; and dismantling the die, drying the drilling core for 6h at the temperature of 95 DEG C, and naturally cooling to room temperature. The permeability, water sensitivity, salt sensitivity, velocity sensitivity, acid sensitivity and alkali sensitivity of ...

Clay-free drilling fluid filter cake removing system

The invention relates to a clay-free drilling fluid filter cake removing system. In the system, cleaning-gelout working solution is prepared by uniformly mixing xylene, petroleum ether, nonylphenol polyoxyethylene ether with the HLB value of 5, nonylphenol polyoxyethylene ether with the HLB value of 13 and 8-10 alcohol polyoxyethylene ether in a weight ratio of 56:25:7:7:5 and mixing clean water,ammonium persulfate, potassium chloride, sodium carbonate, a stratum cleaning agent in a weight ratio of 86:3:2:5:4; corroding-gelout working solution is prepared by mixing the clean water, hydrochloric acid, phosphoric acid, hydrofluoric acid, a corrosion inhibitor SA1-3 and ammonium citrate in a weight ratio of 69.5:15:7.7:5.5:1.8:0.5; and post cleaning working solution is prepared by mixing the clean water, the potassium chloride and the tratum cleaning agent in a weight ratio of 94:2:4. The system has the advantages of obvious improvement on gelout effect, good cleaning effect, high dissolution ...

F series slush pump bent axle owner bearing cover fastener for rig

... (B, ) the utility model relates to a slush pump bent axle owner bearing cover fixed connection technical field is a F series slush pump bent axle owner bearing cover fastener for rig, and it includes slush pump casing, main bearing cover and locking device, at the lower through -hole that the left part and the right part of slush pump casing has at least one respectively, has the last through -hole that corresponds with through -hole down on main bearing cover, and the slush pump casing is in the same place with locking device fixed mounting through last through -hole, time through -hole with main bearing cover. The utility model has the advantages of reasonable and compact structure, convenient to use, for current slush pump bent axle owner bearing cover fixed connection device, the setting of lower through -hole be convenient for with the fracture under the bolt in the through -hole take out, shortened the repair time, reduced the cost of repairs. (B, ) ...

Oil displacing method for residual oil/asphalt emulsion

The invention relates to an oil displacing method for residual oil/asphalt emulsion. The method comprises the following steps of: heating the residual oil/asphalt to a flow state; preparing aqueous solution of surfactant with certain concentration and heating the aqueous solution to 80 DEG C; adding the residual oil/asphalt in the flow state into hot solution of surfactant according to proportionand stirring the mixture for emulsifying; and performing oil displacement on water on site until water content is over 98 percent, injecting the residual oil/asphalt emulsion for displacement; and subsequently performing water displacing, wherein the surfactant is a composite surfactant obtained by compounding hexadecyl benzene sulfonic acid sodium salt, cetyl trimethyl ammonium bromide, nonylphenol polyoxyethylene ether and the like with equal amount; the weight concentration of the composite surfactant is between 0.05 and 0.5 percent; the weight content of the residual oil/asphalt is between 1 ...

Nucleus-containing nutritional gel

The invention discloses nucleus-containing nutritional gel, which consists of water, partially-hydrolyzed polyacrylamide, a chromium acetate solution, thiourea, modified cellulose, corn steep powder, sodium nitrate and diammonium hydrogen phosphate. According to the nucleus-containing nutritional gel, the gel strength is enhanced through modified cellulose particles, the injection fluid wave and volume are enlarged by using an own functional blockage water current advantage channel, the physical property of crude oil and the property of an oil-water interface are improved through the biological functions and the biochemical functions of microorganisms, and the yield is increased. The nucleus-containing nutritional gel is applied to medium and high-water-content oil deposits in order to improve the exploitation effect.

Oil displacing method for residual oil/asphalt emulsion

Low solid phase drilling fluid filter cake removing system

The invention relates to a low solid phase drilling fluid filter cake removing system which consists of a cleaning gel braking working solution, a corrosion gel braking working solution and a post-cleaning working solution, and comprises the steps: mixing dimethyl benzene, petroleum ether, nonylphenol polyoxyethylene ether with the HLB (hydrophile-lipophile balance) values of 5 and 13, polyoxyethylene ether with 8-10 alcohol according to the weight ratio of 56: 25: 7: 7: 5; then, preparing the cleaning gel braking working solution from clear water, ammonium persulfate, potassium chloride, sodium carbonate and a stratigraphic cleaning agent according to the weight ratio of 78.5: 3: 2: 12.5: 4; preparing the corrosion gel braking working solution from clear water, industrial acetic acid, industrial hydrochloric acid, industrial hydrofluoric acid, a corrosion inhibitor SA1-3 and ammonium citrate according to the weight ratio of 56: 5: 31: 5.5: 2: 0.5; and preparing the post-cleaning working ...

Composite microorganism oil-displacing agent

The invention relates to a composite microorganism oil-displacing agent for improving the oil recovery rate. The composite microorganism oil-displacing agent is prepared by adding mixed liquid containing 1-8 percent of byproducts of triticeae crops, 1-8 percent of byproducts of maize, 0.5-6 percent of byproducts of wood and the balanced of water by weight into 5-10mg/L trace element and 300-500mg/L polyacrylamide, wherein the particle diameters of the byproducts of crops and wood are smaller than 0.5 mm. The composite microorganism oil-displacing agent is filled with the aid of oxygen-containing air, has dual functions of providing nutrition for microorganism and plugging a high permeability zone, can enlarge the swept volume of nutrient fluid and the fermentation range of the microorganism, prolong the acting time between the microorganism and rock and fluid in an oil layer, satisfy the requirement for fermentation time, provide conditions for biological action and biochemical actionand ...

Dog is with dual -purpose face guard of atomizing oxygen suppliment

The utility model discloses a dog is with dual -purpose face guard of atomizing oxygen suppliment, include with the anastomotic face guard body of the facial shape of dog, the lower extreme of face guard body is equipped with the connecting pipe, just the face guard body is equipped with soft rubber driving fit cover with the opening edge of the facial contact of dog, just the soft rubber driving fit is sheathe in and is equipped with the elastic cord structure. The utility model discloses a dog is with dual -purpose face guard of atomizing oxygen suppliment covers on the dog face through setting up the face guard body, then utilizes the elastic cord structure fixed with the face guard, and under the tensile force of elastic cord structure, soft rubber driving fit cover is drawn back, can effectively increase the combination area of soft rubber driving fit cover and dog face, can improve the driving fit effect promptly, can effectively satisfy the operation requirement of atomizing and ...

Treating fluid for high solid phase drilling fluid filter cake removal

A high solid phase drilling fluid filter cake removal treating fluid is applied to the technical field of petroleum drilling and completion. The invention comprises three treating fluids, namely cleaning breaking liquid, dissolution breaking liquid and post cleaning liquid; the cleaning breaking liquid comprises the following components: dimethylbenzene, petroleum ether, nonylphenol polyoxyethylene ether (OP-4), nonylphenol polyoxyethylene ether (OP-10), 8-10 alcohol polyoxyethylene ether, ammonium persulphate, potassium chloride and water; the dissolution breaking liquid comprises the following components: acetic acid, hydrochloric acid, hydrofluoric acid, inhibiter SA1-3, ammonium citrate and water; the post cleaning liquid comprises the following components: dimethylbenzene, petroleum ether, nonylphenol polyoxyethylene ether (OP-4), nonylphenol polyoxyethylene ether (OP-10), 8-10 alcohol polyoxyethylene ether, potassium chloride and water. By cleaning breaking, dissolution breakingand ...