69 results about "Well drainage" patented technology

The invention provides a production control method and system based on gas well multi-stage joint modeling, and a dynamic self-adaptive drainage gas recovery decision system is constructed by fusing real-time monitoring data and historical production data. A coupling model set is designed according to the gas-water ratio, wellhead pressure and gas production rate characteristics of different production stages of a gas well, and recognition of the production stages and continuous prediction of the gas-water ratio are achieved. On the basis of dynamic feature fusion and implicit collaborative coding, stage-adaptive parameter configuration is generated, parameter space topology reconstruction and a multi-target game verification mechanism are introduced, and a closed-loop control link from data-driven modeling to physical verification optimization is formed through physical constraint embedding, Pareto optimal search and Nash equilibrium convergence. According to the gas well drainage gas recovery control method, gas well full-life-cycle self-adaptive regulation and control and multi-target collaborative optimization are achieved, the problems that in gas well drainage gas recovery, stage adaptability is poor, and multi-target conflicts exist are solved, the productivity is remarkably improved, and the operation and maintenance risk is reduced.

The utility model relates to the technical field of mine drainage, in particular to an underground coal mine drainage device which comprises a mine base layer and further comprises a detection assembly, a drainage assembly and a drainage assembly. The sewage discharging assembly is arranged at the bottom of the inner cavity of the water sump and facilitates discharging sludge sinking to the bottom. According to the utility model, the KJ1158 hydrological dynamic observation system is utilized to monitor information such as flow, flow velocity and the like of each underground site in real time, and the KJ1137 mine hydrological dynamic monitoring and early warning system can trigger an alarm to remind, so that workers can respond quickly, and the working efficiency is improved; redundant accumulated water can be quickly drained through the drainage assembly; the accumulated water level height is monitored in real time through the detection assembly, and accumulated water level height data are visually displayed to workers, so that the data are collected and analyzed in a centralized manner, and equipment operation is convenient to manage and optimize; sludge sinking to the bottom of the water sump inner cavity can be discharged through the sewage discharging assembly, and therefore normal operation and efficient drainage of the mine water sump can be guaranteed.

The utility model relates to the technical field of slope protection structures, in particular to an ecological slope protection structure. According to the technical scheme, the device comprises two sets of cross protection frames, each set of cross protection frame comprises a cross protection plate, a connecting table is arranged at the end corner position of one end of each cross protection plate, and a protection pier is arranged at the end corner position of the end, away from the connecting table, of each cross protection plate; a lower side plate frame and an upper side plate frame are arranged on the sides, close to each other, of the fender piers on the two sets of crossed protective frames correspondingly. The cross protection frame, the lower side plate frame and the upper side plate frame are integrally arranged in the shape of the inclined plane rhombus, so that the slope protection frame can be better matched with a sloping field, meanwhile, the rhombus structure can provide a better drainage effect, water retention on the slope surface can be reduced, landslide or soil erosion caused by accumulated water is avoided, and the slope protection effect is improved. Meanwhile, flexible adjustment can be achieved according to different terrains and gradients, different slope protection requirements are met, the self-locking performance and stability are high, external pressure and stress can be effectively dispersed, and slope landslide or collapse is prevented.

The utility model relates to an airport ground well drainage system, which is characterized in that a water collecting pit is arranged at the bottom of a well pit of a ground well, and the drainage system comprises a drainage pump, a first liquid level sensor, a second liquid level sensor, a drainage hose, a one-way check valve, a drainage embedded part and a ground well PLC (Programmable Logic Controller) control box, the drainage pump, the first liquid level sensor and the second liquid level sensor are all electrically connected with the ground well PLC control box, the drainage pump is arranged in a sump and connected with the one-way check valve through a drainage hose, the one-way check valve is connected with the drainage embedded part through the drainage hose, and therefore a drainage main loop of a ground well is formed. And water in the ground well is discharged into a ground airport apron or a drainage pipe network through the main loop. The two liquid level sensors are adopted, liquid level monitoring and water level offside monitoring can be achieved, meanwhile, fault alarm of the drainage pump can be achieved, and the normal working state of the drainage pump is guaranteed.

The invention relates to the technical field of coal mining, in particular to a method for treating a room-and-pillar goaf through grouting and recycling coal pillars through fully mechanized mining, which comprises the following steps: forming a detection directional hole through a directional drilling technology, performing field detection on a distribution area of the room-and-pillar goaf, constructing a three-dimensional space model of the room-and-pillar goaf, and constructing a three-dimensional space model of the room-and-pillar goaf; gradually obtaining the range of the room-and-pillar goaf according to the boundary points of the room-and-pillar goaf detected by the plurality of detection directional holes; based on the range of the room-and-pillar goaf and the internal structure of the room-and-pillar goaf, the arrangement position, number and depth of drainage drill holes are obtained; based on the arrangement position, number and depth of the drainage drill holes, accumulated water in the goaf is introduced into a mine drainage system through a drainage pipe; grouting treatment is conducted on the room-pillar type goaf through the grouting drill holes; and after the working face is arranged according to the working face arrangement scheme, coal pillar recovery operation is carried out according to the formulated mining scheme.

The application discloses a coal bed gas horizontal well yield increasing method based on controllable shock waves, which comprises the following steps: S1, selecting a group of upward directional drilling construction sites in a horizontal well service underground roadway of a mine, and the directional drilling target positions are respectively coal seams opposite to a plurality of positions of a horizontal well perforation point away from the horizontal well; S2, drilling a hole at a target point A meters away, judging whether the hole is in a fracturing influence range and a horizontal well drainage influence range; if the hole target point is in the fracturing influence range, controllable shock wave construction is performed; if the hole target point is not in the fracturing influence range, construction is performed on other target points again until a target point in the fracturing influence range is found and the construction is stopped; S3, drilling and judgment are performed on each horizontal well perforation by using S2 until target points in the fracturing influence range are found for all the horizontal well perforations, and controllable shock wave construction is performed. The application has the beneficial effects of improving the yield of a coal bed gas well, further expanding a seepage channel and prolonging the production life of the coal bed gas well.

The utility model relates to a valve well drainage device which comprises a pump body and a motor, an impeller assembly is arranged in the pump body, an output shaft of the motor extends into the pump body to be connected with the impeller assembly, the pump body is communicated with a water inlet pipe and a water outlet pipe, and the water inlet pipe is communicated to the bottom of a valve well through a drainage pipe. The filter assembly comprises a V-shaped pipe and a filter screen, the V-shaped pipe is communicated with the water inlet pipe, the filter screen is arranged in the V-shaped pipe, the bottom of the V-shaped pipe is communicated with a discharging pipe, water in the valve well is pumped out through the pump body, manual pumping is not needed, and time and labor are saved; wherein the drain pipe is communicated with the bottom of the channel valve well, when the pump body is used for draining water, large-particle impurities in sewage are filtered through the filter screen, and the large-particle impurities fall into the discharge pipe, so that the pump body is prevented from being blocked by the large-particle impurities; the impeller assembly rotates in the pump body, so that a turbulent flow effect can be achieved on water flow, and the situation that the pump body is blocked due to the fact that sludge is accumulated in the pump body is avoided.

The present application relates to the technical field of oilfield development, and particularly relates to a gas well drainage spiral degassing composite sand prevention device, which comprises a sand prevention oil well pump, a lower oil pipe section connected to the lower end of the sand prevention oil well pump, a special-shaped variable buckle connected to the lower end of the lower oil pipe section, outer and inner connecting parts provided at the upper and lower ends of the special-shaped variable buckle, an outer connecting part at the lower end of the special-shaped variable buckle connected to a sand settling tail pipe assembly, the sand settling tail pipe assembly comprising at least one sand settling pipe and a bottom plug connected to the bottom end, and a central pipe assembly coaxially arranged in the sand settling pipe. The uppermost sand settling pipe is connected to a wire-wound screen pipe with a gap of 0.2 mm, thereby performing the first filtration on the formation water, and the special-shaped variable buckle is connected to a laser slotted sand control screen pipe with a gap of 0.15 mm, thereby performing the second filtration on the formation water, effectively preventing the sand particles with different particle sizes from entering the sand prevention oil well pump, and avoiding the sand sticking of the pump cylinder and the failure of the valve.

A controllable shock wave-based coalbed methane horizontal well stimulation method, comprising: S1: selecting a group of upward directional drilling construction sites in a downhole roadway of a horizontal well service mine, directional drilling target positions being respectively coalbeds (3) directly facing horizontal well perforations (2) at multiple positions from a horizontal well; S2: performing construction drilling on a target at A meters, and determining whether the drilling target enters a fracturing influence range and whether the drilling target is within a horizontal well drainage influence range; if the drilling target is within the fracturing influence range, performing controllable shock wave construction; and if the drilling target is not within the fracturing influence range, re-constructing other target positions until a target position within the fracturing influence range is found, and then stopping; and S3, executing S2, including construction drilling and determination, for each horizontal well perforation until target positions within the fracturing influence range corresponding to all the horizontal well perforations are found, and performing controllable shock wave construction. By means of the method, the production of a coalbed methane well is increased, a seepage channel is further expanded, and the production life of the coalbed methane well is prolonged.

The utility model relates to the technical field of urban road drainage, in particular to a composite catch basin drainage system based on permeable asphalt concrete. The drainage system comprises an asphalt concrete surface layer (8), a base layer (9) is arranged below the asphalt concrete surface layer (8), a subbase layer (10) is arranged below the base layer (9), and rainwater branch pipes (6) are arranged below the subbase layer (10); a prefabricated concrete catch basin main body (2) is arranged on the road, and a plurality of groups of circular drainage holes (3) are formed in the prefabricated concrete catch basin main body (2); a permeable asphalt concrete layer (1) is arranged above the precast concrete catch basin main body (2); a water collecting cavity (4) is arranged below the prefabricated concrete catch basin main body (2); the water collecting cavity (4) is connected with a rainwater branch pipe (6); and a C15 concrete cushion layer (5) is arranged below the water collecting cavity (4).

This invention relates to the field of foundation pit dewatering technology, and in particular to a drainage structure and construction method for deep foundation pit sump wells. The drainage structure includes a deep well, a sump, and a sand-free ash pipe. The sump is located at the top of the deep well. The bottom end of the sand-free ash pipe extends to the bottom of the deep well, and the top end extends into the sump and protrudes from the bottom inner wall of the sump. An outer pipe is fixedly fitted around the sand-free ash pipe, located below the sump and above half the length of the sand-free ash pipe. Multiple sedimentation chambers of progressively decreasing height are provided between the outer pipe and the sand-free ash pipe. The drainage structure proposed in this invention can promptly discharge water from the deep well, thus preventing the deep well from becoming full and causing water accumulation in the deep foundation pit that is difficult to infiltrate. Furthermore, the discharged water contains less sediment, reducing the filtration and purification pressure on the municipal pipe network, thereby indirectly reducing the energy consumed in municipal water supply and drainage processes, achieving energy conservation and emission reduction.

The present invention relates to the field of data reasoning technology, and discloses a method for optimizing a drainage and gas production process system for a complex gas well. The method comprises: obtaining geological characteristic parameters and real-time production dynamic parameters of the gas well; identifying stable production constraints of the gas well based on the geological characteristic parameters and the real-time production dynamic parameters; establishing an optimization target for the drainage and gas production process for the gas well based on the stable production constraints; determining a critical liquid-carrying flow rate threshold of the gas well through the distribution morphology of liquid accumulation in the wellbore of the gas well; generating an optimal exhaust scheme for the gas injection speed and period in the gas well using the critical liquid-carrying flow rate threshold and the optimization target as boundary conditions; and adjusting the throttle opening and the gas injection timing in the gas well according to the optimal exhaust scheme. The present invention can improve the optimization quality of the drainage and gas production process system for the gas well.

The utility model relates to the technical field of natural gas collection, in particular to a coal-bed gas well drainage and mining device which comprises a water pumping pipe, a filter screen, a dredging assembly, a filter cylinder and a water separator, the filter screen and the dredging assembly are arranged at the end, located in an outer sleeve, of the water pumping pipe, and the filter cylinder is arranged at the end, located on the ground, of the water pumping pipe. Comprising a dredging barrel connected with a water pumping pipe, a displacement component arranged in the dredging barrel, and a clearing component arranged on the displacement component. The pulverized coal leaked by the screen mesh can be collected by the screen drum, the screen drum is located on the ground and is convenient to overhaul and replace, the collected pulverized coal can be utilized, and waste is reduced.

The invention provides a shale gas well after-pressure drainage system establishment method and device and a medium, and relates to the technical field of shale gas well drainage and mining, and the shale gas well after-pressure drainage system establishment method comprises the steps that on the basis of target parameters of a simulated shale gas well, a typical well group is selected; and based on the drainage parameters of the typical well group, a drainage system after pressure drainage is established, and the drainage system after pressure drainage comprises a soaking time determination system and an oil nozzle replacement system. According to the method, sand control, pressure control and the optimal test flow-back rate are taken as targets, and a liquid drainage system, including a soaking time system and an oil nozzle replacement system, suitable for the block after pressure is established, so that the accuracy of soaking time and oil nozzle replacement is improved, the problems of fuzzy consideration and poor applicability in an existing system are solved, the flow-back rate of a proppant can be effectively reduced, and the production efficiency is improved. A good flowback effect can be achieved, and the flow conductivity of the crack is guaranteed. And meanwhile, liquid drainage and sand production can be effectively avoided, and the productivity is improved to the maximum extent.

The utility model discloses a large -scale sinking well drainage sinking centralized control system, and sinking well foundation structure includes well wall, multiple first partition wall and multiple second partition wall of being located in well wall, to separate the space surrounded by well wall into multiple well holes, first partition wall sets up along first direction, and second partition wall sets up along second direction, and first direction and second direction form certain angle, control system includes multiple row of slag main pipe, and row of slag main pipe is located in first partition wall and / or second partition wall, and one end extends to sand trap, multiple water supply main pipe, and water supply main pipe is located in first partition wall and / or second partition wall, and one end is connected water supply device, wherein, at least one in adjacent two peripheral well holes is equipped with sand pumping device, and the internal well hole is equipped with sand pumping device, and sand pumping device includes water supply small pipe and row of slag small pipe, and multiple water supply small pipes are connected with one water supply main pipe correspondingly, and multiple row of slag small pipes are connected with one row of slag main pipe correspondingly, and have communication state and barrier state respectively.

The invention discloses a red-mine drainage pipeline connector convenient to dredge for a mine and a dredging method, and relates to the technical field of underground drainage of coal mines, the red-mine drainage pipeline connector comprises a water inlet pipe and a water outlet pipe, and at least two water outlets are formed in the pipe wall of the water inlet pipe; the water outlet pipe is fixedly sleeved outside the water inlet pipe, so that an annular overflowing space is formed between the outer wall of the water inlet pipe and the inner wall of the water outlet pipe, and a connecting pipe communicated with the annular overflowing space is arranged on the side wall of the water outlet pipe. The problems that in the prior art, due to the fact that a traditional mine drainage pipeline connecting structure is single in function and lacks efficient self-cleaning capacity, blockage is prone to occurring when slag-containing water is treated, manual shutdown and disassembly are dependent in the desilting process, and efficiency is low are solved. The device has the advantages that the device is provided with a mechanical scraping and high-pressure hydraulic flushing dual self-cleaning mechanism, efficient and automatic desilting of the filtering unit is achieved, the maintenance efficiency is improved, continuous and stable operation of a drainage system is guaranteed, and the device is suitable for the coal mining environment.

The invention discloses a red-mine intelligent automatic drainage system for a mine and a working method, and relates to the technical field of mine drainage. The red-mine intelligent automatic drainage system comprises a pipeline and a filtering mechanism integrated on the pipeline; the pipeline is formed by connecting a plurality of sections of water pipes, and the filtering mechanism comprises a metal filter cartridge, a cleaning assembly and a pressure relief channel which are arranged in the water pipe; the cleaning assembly is connected with the filter cartridge and is driven by water flow pressure; an inlet of the pressure relief channel is communicated with the interior of the filter cartridge, and on-off is controlled by axial movement of the filter cartridge. The problems that in a traditional mine drainage system in the prior art, a filter screen is prone to being blocked due to solid particles in sewage, cleaning and maintenance are difficult, efficiency is low, and equipment is prone to being damaged are solved. The device has the advantages that automatic cleaning and intelligent pressure relief of the filter cartridge are achieved through hydraulic driving, blockage is effectively avoided, and the automation degree and operation reliability of a drainage system are improved.

According to the construction method for anti-floating treatment of the existing building basement, the safe and economical target control water level is determined through structural loads and specifications, and an accurate foundation is laid for system design; through comparison and checking of theoretical and actually measured data, it is ensured that the drainage capacity is sufficient to cope with extreme working conditions, and the anti-floating safety reserve is greatly improved; according to the method, the existing water collecting wells and water pumps are fully utilized and optimized, economical and reasonable transformation is achieved, a drainage system is finely designed according to drainage tasks and geological conditions of all the wells, and the drainage efficiency and the long-term silt prevention performance are guaranteed; water level automatic control and drainage linkage are achieved through the elevation of the return bend pipe, sensitive response and unattended operation are achieved, and the operation and maintenance cost is reduced. According to the method, a complete closed loop from water level determination, system design, automatic control to monitoring verification is formed, and the reliability, economical efficiency and long-term effectiveness of anti-floating treatment of the existing building basement are remarkably improved.

The embodiment of the invention provides a determination method and device for a shale gas well drainage and recovery process and a storage medium, and belongs to the technical field of shale gas well drainage and gas recovery. The determination method of the shale gas well discharge and recovery process comprises the steps that the daily gas production rate and wellhead pressure of a shale gas well are obtained; determining the critical liquid-carrying flow of the shale gas well by using a preset critical liquid-carrying flow model; when the daily gas production rate is smaller than or equal to the critical liquid-carrying flow rate, a first chart is determined in a preset chart library based on the wellhead pressure, and the preset chart library comprises a plurality of drainage and mining process screening charts of the preset wellhead pressure; and based on the first chart, determining the discharge and recovery process of the shale gas well. According to the method, the liquid carrying capacity of the shale gas well and the applicability and economical efficiency of different drainage and mining processes are comprehensively considered, selection of the on-site drainage and mining processes is guided more rapidly and scientifically through the drainage and mining process screening plate, and therefore the problem of well bottom liquid accumulation caused by reduction of the liquid carrying capacity is solved, and the development efficiency and economic benefits of the shale gas well are improved.

The utility model provides an anti-scaling device, which belongs to the technical field of anti-scaling blockage of mine drainage pumping wells, and comprises a wellhead inflation plugging device, a well drainage pipe, an exhaust pipe and an anti-scaling agent pipe, the wellhead inflation plugging device is of a cylindrical structure, the size of the bottom of the wellhead inflation plugging device is matched with the size of a wellhead, and the well drainage pipe is connected with the anti-scaling agent pipe. The size of the top of the anti-scaling agent is larger than that of the well mouth, and the size changing position is of an arc-shaped structure and used for blocking the well mouth so as to prevent external air from entering the well and prevent the anti-scaling agent from escaping. The well drainage pipe is fixed to the center of the wellhead inflation plugging device and used for discharging sewage outwards. The utility model provides an anti-scaling device which can solve the problems of unsmooth water flow, well wall damage, pump machine abrasion and the like caused by scaling and blockage in the using process of a pumping well, so that the using efficiency of a water pump is improved, the service life of the water pump is prolonged, and stable operation and water supply safety of the pumping well are guaranteed.

The present application relates to the technical field of anti-floating dewatering of underground engineering, and particularly relates to a cutoff well drainage system and a preparation method. The cutoff well drainage system comprises a closed water-stopping curtain made around the outer wall of a basement, the water-stopping curtain entering an aquiclude, a cutoff well circle formed by a circle of cutoff wells along the inner side of the basement outer wall bottom plate, and the cutoff pumping wells and the cutoff self-flowing wells being arranged alternately. The geometric parameters and the single-well flow rate of each dewatering unit cutoff pumping well are determined first, and then the spacing and the total number of adjacent cutoff pumping wells are determined through calculation, and the cutoff wells are arranged in the permeable layer. The groundwater around the bottom end of the water-stopping curtain is intercepted by the cutoff wells, and the groundwater in the cutoff wells is pumped out, so that the groundwater level is controlled below the anti-floating water level. The cutoff pumping wells and the cutoff self-flowing wells are connected through overflow drainage channels. According to the technical scheme of the present application, the water-stopping curtain and the cutoff wells are combined to form a double water-stopping barrier, thereby improving the reliability of the basement anti-floating.

1. The name of the design product: grating cover plate. 2. The use of the design product: used for installing on facilities such as inspection wells, drainage ditches, etc. to play a role of drainage. 3. The design points of the design product: in shape. 4. The picture or photo that best indicates the design points: perspective view.

The utility model provides a coal mine water distribution well drainage system which comprises a water distribution well and a water sump, the water distribution well and the water sump are communicated through a connecting channel, a pump room is arranged on the top of the water distribution well, and a drainage channel is arranged on the side wall of the pump room. A drainage assembly is arranged in the pump room and comprises a shell, the axis position of the shell penetrates through and is rotationally provided with a rotating pipe with the closed bottom end, the bottom end of the rotating pipe extends into the water distribution well, the side wall of the shell is provided with a water inlet, the top of the shell is provided with a water outlet, the rotating pipe is further provided with a plurality of fan blades, a drainage pump is arranged above the shell, and an inlet of the drainage pump is connected with the top end of the rotating pipe. The drainage pump outlet is connected with the water inlet pipeline; a paddle and a branch pipe are arranged on the rotating pipe, and a water inlet hole is formed in the branch pipe; the drainage port is connected with one end of a drainage pipe; a water guide cover is arranged in the water distribution well; a sludge outlet is formed in the bottom of the water distribution well. According to the drainage system provided by the utility model, impurities in water can be conveniently precipitated, the water and sludge are respectively discharged, and the working efficiency and the service life of equipment are ensured.

The utility model discloses an anti-blocking slag separation net for an underground ditch, which belongs to the technical field of mine drainage and comprises a slag separation net body, the bottom of the slag separation net body is rotatably connected with two guide plates which are symmetrically distributed, a connecting plate is arranged below the slag separation net body, the top of the connecting plate is fixedly connected with a plurality of cleaning columns which are distributed at equal intervals, and the cleaning columns are arranged on the bottom of the slag separation net body. Through the adjustable cleaning assembly, an operator only needs to rotate a handle on the ground or a safe area, the connecting plate and the cleaning column on the connecting plate can be driven to ascend, the slag separation net body is automatically cleaned, the complexity and high risks caused by manual underground operation are avoided, the cleaning efficiency is remarkably improved, meanwhile, the labor intensity of workers is greatly reduced, and the labor intensity of the workers is reduced. By means of direct contact between the cleaning columns and the slag separation net body, thoroughness and uniformity of cleaning are guaranteed, impurities attached to the slag separation net are effectively removed, the problems that traditional anti-blocking measures are poor in effect and need to be cleaned frequently are solved, and the service life of the slag separation net is prolonged.

This invention discloses a method, electronic equipment, and medium for deploying drainage wells in a gas reservoir. Belonging to the field of oil and gas extraction technology, the method includes determining the reservoir water intrusion pattern and channels, calculating the cumulative water intrusion volume, and calculating the daily water intrusion volume based on the cumulative water intrusion volume. Based on the daily water intrusion volume, the total drainage volume of the gas reservoir is determined, and the total drainage volume of existing wells is determined accordingly. The gap drainage volume is determined based on the total drainage volume of the gas reservoir and the total drainage volume of existing wells; the gap drainage volume is the drainage volume of new wells that need to be deployed to supplement the existing drainage volume; the well type, drainage volume, and number of new wells are determined according to the required drainage volume; and the well trajectory orientation, plane position, vertical position, and length of the new wells are set. This method enables new wells to work collaboratively with existing wells, effectively improving the utilization rate of gas reservoir reserves, reducing abandonment pressure, and ultimately significantly improving the gas reservoir recovery rate, allowing gas reservoir development to maintain a highly efficient and stable state for a longer period.

The utility model relates to the field of road engineering, and discloses a soft soil roadbed reinforcing structure which comprises a telescopic pipe, a drainage pipe and a drainage channel, the upper end of the telescopic pipe is fixedly connected with a pressing plate, a plurality of drainage holes are formed in a pipe body of the telescopic pipe, and a drainage channel is formed in the drainage pipe. A plurality of through holes are formed in a pipe body of the drainage pipe, the diameter of the through holes corresponds to the peripheral diameter of the telescopic pipe, the through holes are movably connected with the telescopic pipe in a sleeved mode, and a plurality of square holes are formed in the side wall of the drainage channel. According to the utility model, water in the soil is squeezed and removed through a vertical shaft drainage and drainage pipe method, the operation process is simple and effective, drainage can be carried out on the inner roadbed of the road for a long time, and the problems of softness and collapse caused by water immersion of the roadbed in a rainwater season are prevented; meanwhile, only the strip-shaped groove needs to be excavated, the engineering amount is small, and the engineering efficiency is improved; only a road roller is needed for overall pressurization, and the defect that the reinforcing effect is not uniform is overcome.

This utility model belongs to the field of oil pump technology and discloses a self-cleaning anti-jamming oil pump, including a pump barrel and a plunger. The plunger and pump barrel are clearance-fitted. A spiral groove is formed on the inner wall of the pump barrel. The spiral groove is located within the stroke range of the plunger's reciprocating motion, and the axial length of the plunger is greater than the axial length of the spiral groove. This allows the spiral groove to not only accommodate solid particles, but also, under the conditions of coalbed methane well drainage with high coal powder content, certain viscosity of well fluid, and severe scaling, the flow field and direction of the well fluid located in the spiral groove are changed when the plunger reciprocates through it. This causes the well fluid in the spiral groove to flow, thereby flushing and cleaning the solid particles adhering to the spiral groove, preventing the accumulation of solid particles in the spiral groove, thus reducing the probability of pump jamming, extending the service life of the oil pump, reducing the frequency of well workover and pump inspection operations, and minimizing the impact on production.

The invention relates to an intelligent drainage and gas production system for shale gas and a control method. The drainage and gas production system comprises a first flow meter, a gas lift control valve, a wellhead gas production tree and an automatic bubble discharging device which are sequentially connected through a pipeline. The wellhead intelligent pressure control device is arranged at the produced gas end of the wellhead gas production tree; the second flow meter is connected with the wellhead intelligent pressure control device through a pipeline; the pressure transmitter is arranged on a wellhead gas production tree; the far-end measurement and control unit device is respectively in communication connection with the pressure transmitter and the second flow meter; and the shale gas fine discharging and mining control module is in communication connection with the first flow meter, the gas lift control valve, the far-end measurement and control unit device, the wellhead intelligent pressure control device and the automatic bubble discharging device. Compared with the prior art, intelligent control over the shale gas well drainage gas recovery process is achieved, the defect that a traditional process depends on manual operation is effectively overcome, the automation level and the response speed of gas well production are improved, and errors and production cost caused by human factors are reduced.

The application discloses a kind of super deep radiation well drainage structure and its construction method, including radiation well and large-diameter sand well;The radiation well includes shaft and radiation pipe, the large-diameter sand well includes upper sand well and lower sand well, the large-diameter sand well is located inside the shaft, the radiation pipe is located at the circumferential side of the shaft and is communicated with the shaft, the side of the shaft away from the radiation pipe is provided with water guide pipe, and the water guide pipe is communicated with the shaft;Using the characteristics of large-diameter sand well can quickly drain, excavate large-diameter sand well in early stage to quickly drain and control the height of wetting line, prevent the problems such as sand gushing, sinking well, sinking well deviation, bottom sealing difficulty and so on in radiation well, and solve the problem that super deep radiation well cannot be constructed due to sand gushing and other reasons.The combination of large-diameter sand well and radiation well makes the depth of super deep radiation well reach more than 60m, expands the application range of radiation well, and especially makes the application of radiation well possible in the drainage of high dam tailings pond.