Novel method for synthesizing acetyl-sulfisoxazole

The invention discloses a method for preparing gantrisinacetyl. The method comprises the steps of preparing sulfafurazole into sodium salt, using acetone as a solvent, using acetic anhydride for acylation and obtaining the gantrisinacetyl. The yield of the method reaches 85 percent.

Coal bed gas slim-hole hydraulic jet orienting fracturing yield increasing method

The invention relates to a method for small well-hole hydraulic jetting orientating compression-crack production increase of a coal bed well used for reformation and production increase of storage beds of a coal-bed gas well. Based on the orientating small well-hole hydraulic jetting, active water is used for adding sand and pressure crack. The jetting direction is controlled on the positions with the intervals of certain included angles from 30 DEG to 45 DEG in the direction of the maximum horizontal stress, the jetting diameter is 1 inch, and horizontal holes have a certain length from 50 m to 100 m; the active water of a normal coal-bed gas well is matched for adding sand and pressure crack; according to geology measurement, the direction of the high local horizontal stress is acquired to carry out constructional design; devices and materials used for hydraulic jetting are prepared as required. The method includes the following steps of hydraulic jetting constructional work, depth and ...

Coal seam depth deflagration method

The invention relates to a low pressure gas layer and gas fracturing method, in particular to a coal seam deep deflagration method. The method comprises the following steps: nitryl liquid is injected to a coal seam, and then solid grain is fed into the coal seam; a lighting-off torch is cast to ignite starting mix, thus producing high temperature and high pressure to produce powerful impact on the coal seam; in addition, radial crack and high-temperature baking are produced, and the coal seam is restructured. As by adopting the invention, a natural fracture of the coal seam can be communicated; an original fracture can be unplugged; and deposited contamination particle is removed to form multiple fractures. In addition, water lock in the coal seam is eliminated, and seam pressure is increased to cause local cracking, thus forming high yield conditions for production of more coal-seam gas, and creating conditions for development of low pressure coal-seam gas.

Fan and motor thereof

The invention discloses a motor which comprises a rotor magnetic ring, a stator iron core, a first silicon steel sheet and a second silicon steel sheet. The stator iron core is arranged outside the rotor magnetic ring annularly. The first silicon steel sheet is annular, is arranged at one upside of the stator iron core and is provided with at least one first magnetic pole. The second silicon steel sheet is annular, is arranged at one downside of the stator iron core and is provided with at least one second magnetic pole, wherein, the first magnetic pole and the second magnetic pole are arranged in a stagger way at the projection direction. The invention also discloses a fan with the motor.

Blasting type cave well completion technological method of coal layer gas well

Fan and motor thereof

The invention discloses a fan and a motor thereof. The fan comprises an interior rotor motor. The motor comprises a casing, a rotor group and a stator group, wherein the rotor group is provided with a rotor. The rotor is provided with a fan blade arranged in the casing, the stator group corresponding to the rotor group is arranged in the casing and comprises a coil, and the coil is formed in such a way that a continuous wire material surrounds the rotor after forming a flat helical structure along the circumferential direction of the rotation of the motor by taking the radial direction of the motor as a center in a helical winding mode.

Method for purifying and liquefying coalbed gas

The invention relates to a method for purifying and liquefying coalbed gas, the method is used for purifying and liquefying the exhausted oxygen-containing mixed coalbed gas of worked-out areas and mining areas, and the method is mainly realized through the following process: raw material coalbed gas-deoxidation-pressure boosting-decarburization-dehydration-denitrification-storage and transportation, wherein, the dioxidation is carried out as follows: the sulfur-tolerant catalytic deoxidation process mixes the raw material coalbed gas with part of deoxidizing circulating gas in a gas cabinet at 70KPa, the mixed gas enters a reactor after pre-heating by a pre-heater, methane and oxygen are reacted in a catalyst bed within a certain temperature range to generate CO2 and H2O; then the pressure boosting is carried out, the MEA plus MDEA decarburization process is adopted for decarburization, the physical absorption method is utilized for dehydration, the mixed refrigerant process is adopted ...

Profile control and water plugging technology for coal bed gas

The invention relates to a coal bed air-regulating agent water shutoff technology it is based on geological features and fracturing transformation parameters of the coal bed methane, determine the water layer, constitute the overall water shutoff profile control programmes; the technology programmes of the water blocking and the amount is designed in accordance with the principle that water shutoff gel system subparagraph design , intensity gradually increased, moderate gel viscosity and various sect crosslinking time reasonable; construction in accordance with the above design programmes. The invention rational design, process is simple and easy construction, can be achieved selective water shutoff using the technology, stopping the channel between the coalbed methane wells and storage and not plug the coal reservoir cleats, fissures and cracks fracturing and thereby effectively drainage relief to ensure normal production of the coalbed methane wells.

Motor, fan and stator structure thereof

The invention discloses a motor, a fan and a stator structure thereof; wherein, the stator structure is matched with the rotor structure of the motor and the fan; furthermore, the rotor structure is provided with a magnetic ring; the stator structure comprises a silicon steel sheet group and a plurality of winding groups; and the number of the winding groups is less than that of the magnetic pole; therefore, more space can be provided so as to set passive elements and/or sensing elements, thereby being more applicable to the thin and short electronic products.

Coal-bed gas thermal cavity completion method

The invention belongs to the field of coal-bed gas exploration and development, and in particular relates to a coal-bed gas thermal cavity completion method, which comprises the following steps of: (1) performing high temperature resistant cement casing cementation on the top of a coal bed; (2) drilling to a position 50 to 80 meters lower than the coal bed, and performing hole enlargement completion on a coal bed section; (3) removing coal dust from a shaft; (4) descending a thermal completion combination stem to the middle of a cavity; (5) injecting silane and oxygen, beginning combusting on the cavity part, and heating the coal bed; (6) when the temperature is higher than 600DEG C, determining whether to stop supplying the silane according to a component detection result of flow-back gas; and (7) when the temperature is raised to 1,500DEG C, stopping supplying the oxygen. By the method, the cavity completion is performed under the thermal condition, the coal bed around the shaft is stable ...

Fan and motor thereof

The invention discloses a fan and a motor thereof. The motor comprises a bearing structure, a rotor structure, a stator structure and a magnetic body, wherein the rotor structure is provided with a rotating shaft arranged on the bearing structure; the stator structure is arranged corresponding to the rotor structure; the magnetic body is arranged opposite to the rotating shaft and is provided with a first magnetic element and a second magnetic element; and the second magnetic element is arranged on the periphery of the first magnetic element. The invention also discloses the fan with the motor. Rotating shafts of the fan and the motor thereof have high axial attractive force, thereby reducing the wear degree of a bearing and the noises of the motor and the fan.

Method for removing blockage of oil duct of oil pumping unit reduction gearbox and preventing fault

The invention relates to a method for removing blockage of an oil duct of an oil pumping unit reduction gearbox, preventing faults and eliminating hidden troubles, in particular to a method for removing the blockage of an oil duct of an oil pumping unit reduction gearbox and preventing faults. The method comprises the following steps of arranging a micro camera in a gearbox, examining fault points; starting up an air compressor to self pressurize cleaning agent from a metal expansion sprinkler through a flexible metal pipe so as to seal the opening of an oil duct; and injecting the high-temperature and high-pressure cleaning agent into an oil return duct, an oil chamber and an oil inlet duct for backwashing. With the method for removing the blockage of the oil duct of the oil pumping unit reduction gearbox and preventing faults, blockage removal of the oil duct of the oil pumping reduction gearbox can be carried out on site, and the far infrared micro camera supported by the flexible metal ...

Fan and motor thereof

The invention discloses a fan and a motor thereof. The fan comprises an interior rotor motor. The motor comprises a casing, a rotor group and a stator group, wherein the rotor group is provided with arotor. The rotor is provided with a fan blade arranged in the casing, the stator group corresponding to the rotor group is arranged in the casing and comprises a coil, and the coil is formed in sucha way that a continuous wire material surrounds the rotor after forming a flat helical structure along the circumferential direction of the rotation of the motor by taking the radial direction of themotor as a center in a helical winding mode.