43 results about "Desander" patented technology

This invention discloses an air-lift cyclone sand separator, comprising a sedimentation tank and an air-lift device. The sedimentation tank has a sand-collecting hopper at its lower end, and a hollow shaft extending vertically is placed inside the sedimentation tank. A paddle is fixed to the lower end of the hollow shaft at the upper opening of the sand-collecting hopper. A driving device is fixed to the upper end of the sedimentation tank and connected to the upper end of the hollow shaft. The air-lift device includes an air-lift tank, an air-lift pipe, an air-purge pipe, and a sand-discharge pipe. The air-lift tank is housed within and communicates with the sand-collecting hopper. The air-lift pipe passes through the hollow shaft and communicates with the air-lift tank. The air-purge pipe passes through the hollow shaft and communicates with the sand-collecting hopper. The sand-discharge pipe passes through the hollow shaft and communicates with the air-lift tank. The paddle accelerates the rotation speed of the water flow in the sedimentation tank, allowing the sand to settle better. The settled sand is concentrated in the sand-discharge hopper. The air-lift pipe drives the water flow through the air-lift tank and into the sand-discharge pipe. The air-purge pipe disperses the sand in the sand-collecting hopper, allowing the dispersed sand to enter the sand-discharge pipe with the water flow, resulting in good sand removal efficiency.

The invention discloses a rotary filtration sand remover, and relates to the technical field of rotary filtration sand removal. The device comprises a base and a filtering part, wherein the filtering part is mounted at the top of the base; the power part is arranged on the base; the filtering part comprises a mounting assembly; the mounting assembly is mounted at the top of the base; the filter assembly is mounted on the mounting assembly; and the mounting assembly comprises a desanding cylinder fixedly connected to the top of the base, a mounting block is arranged at the top of the desanding cylinder, a Jaenn mounting screw is arranged at the top of the mounting block, the inner wall of the mounting block is in threaded connection with a cylindrical convex block, and a pressure part is mounted on the cylindrical convex block. According to the rotary filtering sand remover, by arranging the filtering part, the problems that in the using process of an existing rotary filtering sand remover, sand and stones with different sizes are difficult to separate, so that the sand discharging speed is reduced, key screen components are inconvenient to replace and maintain, and the sand removing efficiency is affected are solved.

The invention discloses key equipment for capacity expansion of an old platform of an offshore high-water-content oil field. Comprising a platform original first-stage three-phase separator, a platform original second-stage three-phase separator, a degassing desander, a platform natural gas treatment and recovery system, a platform oil-containing solid recovery system, a tubular vortex pre-dehydrator, a tubular vortex degreaser, a platform production water treatment and reinjection system, an exhaust pipe and a valve assembly. Degassing is completed through weak rotational flow and weight deposition formed by a tangential inlet, sand removal is completed through combination of secondary rotational flow formed by a flow stabilizing cylinder support and a flow adjusting component and an inclined plate, and it is guaranteed that follow-up tubular vortex water pre-diversion and a tubular degreaser work in the optimal working environment.

The invention relates to the technical field of oil and gas exploitation, and discloses a separately-pried ultrahigh-pressure cyclone desander which comprises a base, a connecting seat, a bearing plate, a cyclone desander assembly, a flow dividing manifold, a sand discharging manifold and a sand washing manifold. The round block is inserted into the center hole to trigger the linkage assembly, the sliding seat is driven to drive the abutting rod to symmetrically clamp and rectify the bearing plates, and guiding and positioning of a second chamfer at the bottom end of the round block and a first chamfer at the top end of the center hole are matched, so that the bearing plates can be separated from the sand discharging manifold, and the sand discharging manifold and the sand washing manifold are separated from the bearing plates. The problem of bearing plate butt joint axis dislocation caused by lifting rope deformation, gravity center shift and wind load interference in traditional lifting is solved, the sealing requirement of ultrahigh pressure medium conveying is met, the problem of butt joint difficulty caused by axis deviation is solved, meanwhile, the bearing plate does not need to be manually pushed and adjusted, and potential safety hazards of field operation are reduced.

A downhole solids separator having: a plurality of solids separation modules, a production tube disposed therein, one or more limited entry ports in the production tube, placed in each of the modules, an intake port in the lower half of each module opening into a wellbore annulus, the intake port below the limited entry port of the module, a closed chamber for collecting solids, isolated from the well bore, the closed chamber below modules, a solids conveying conduit from at least one module, opening into the closed chamber, an opening restricted to less than the size of the production tube in the conduit near the bottom of the module, an opening in the production tube in the closed chamber, where the production tube opening and conduit opening are configured to effect a drop fluid velocity into production tube to a level insufficient to carry solids into the production tube.

The utility model relates to the technical field of desanding equipment, in particular to high-pressure desander complete equipment which comprises a structural tank, a liquid storage tank is fixedly mounted on the inner side of the structural tank, and a desanding assembly and a filtering assembly are arranged on the side wall of the liquid storage tank; the desanding assembly comprises an inclined cylinder, the inclined cylinder is fixedly mounted on the side wall of the liquid storage tank, a mounting disc is arranged at the upper end of the inclined cylinder, a plurality of connecting rods are fixedly connected between the mounting disc and the outer wall of the inclined cylinder, and a driving motor is fixedly mounted on the upper side of the mounting disc; the output end of the driving motor rotationally penetrates to the lower side of the mounting disc, a rotating shaft is fixedly mounted at the output end of the driving motor, a spiral conveying auger is fixedly mounted on the outer wall of the rotating shaft, and the spiral conveying auger is located on the inner side of the inclined cylinder. According to the utility model, the sand removing assembly and the filtering assembly are arranged in the liquid storage tank, so that the filter screen is convenient and rapid to replace and not easy to block, and the silt discharging process is simple and efficient, so that the sand removing efficiency of the device is greatly improved, and the practicability is enhanced.

The present application belongs to the technical field of geothermal utilization, and discloses a sandstone heat storage geothermal well heat extraction without water extraction high-efficiency utilization system and a construction method of the system. The main technical features are as follows: the system comprises a geothermal well, a water outlet pipe, a heat exchanger and a water return pipe, a desander and a circulating pump are arranged on the water outlet pipe, a first water stop plate is arranged on the water outlet pipe below each non-bottom heat storage aquifer, and a second water stop plate is arranged on the water outlet pipe at an upper position of the middle part of the bottom heat storage aquifer. During the descending process of the recharge water, part of the recharge water flows into the corresponding heat storage aquifer when passing through each non-bottom heat storage aquifer, and the other part of the recharge water flows downward along the gap between the elastic plate and the inner wall of the well pipe. The water with a higher temperature in the bottom heat storage aquifer is supplemented into the well pipe under the pressure of the bottom heat storage aquifer. The geothermal water extracted from the whole water outlet pipe has a higher temperature and a higher heat efficiency, and the underground water is not polluted.

A spiral sand removing machine capable of removing harmful solid phases in drilling fluid is characterized in that a feeding box is installed on a base, an overflow pipe and a stirrer motor are installed on the upper portion of the feeding box, and a feeding pipe and a sand discharging pipe are installed on the lower portion of the feeding box and connected with the spiral sand removing machine. The spiral sand removing machine is structurally characterized in that a spring supporting vibration frame is mounted on a base; a central shaft is mounted on a vibrating frame as a feeding pipe, bearing seats and eccentric wheels are mounted at two ends of the central shaft, a spiral screen pipe is mounted in the middle of the central shaft, and a driving motor is mounted below the eccentric wheels to drive the eccentric wheels, the central shaft and the spiral screen pipe to rotate to generate centrifugal force and vibrating force to throw drilling fluid out of a screen to flow into a circulating tank; and harmful solid phases and drilling cuttings are discharged out of the spiral screen pipe and are discharged into the sand setting tank. The technical requirement of purifying the drilling fluid is met.

The present invention relates to a downhole carbon dioxide transcritical boosting device and a working method thereof, which belong to the field of unconventional oil and gas resource development. The device comprises a carbon dioxide tanker, a mud pump, a cyclone desander, a double-wall drill pipe, a casing, a screw motor, a screw joint, a power shaft, a first-stage boosting unit, a first-stage boosting piston, a second-stage boosting unit, a second-stage boosting piston, a mixing chamber, a pump outlet chamber, a relief valve, a packer pin shaft, a track groove and a working method thereof. The downhole boosting system is driven by circulating drilling fluid as a power medium, and the CO2 is gradually pressurized and then injected into the formation, thereby overcoming the conventional CO2 formation injection technology, which requires high CO2 corrosion resistance for surface boosting equipment, well pipelines, etc. By utilizing the downhole boosting technology proposed by the present invention, conventional equipment in the oil field can be used for surface devices and double-wall drill pipes in the well, and only the downhole boosting system is required to have CO2 corrosion resistance, which can greatly save economic costs.

The utility model discloses a sand remover pry for shale gas. The sand remover pry comprises a pry seat, a sand remover, an inlet pipe section and an outlet pipe section, the prying seat is mounted on the ground; the desander is a horizontal desander and comprises a barrel, and the bottom of the barrel is mounted on a prying seat through a saddle; a filter element is assembled in the cylinder body, the filter element and the cylinder body are coaxially arranged, and the axes of the filter element and the cylinder body are horizontal; the inlet end of the cylinder body is provided with a tightening end socket, the tightening end socket is connected with the inlet pipe section, and a flow channel connected with the interior of the inlet pipe section and the interior of the filter element is arranged in the tightening end socket; and the inlet pipe section is communicated with an external inlet pipeline through an inlet flange. The prying seat with the horizontal sand remover has the beneficial effects that the prying seat with the horizontal sand remover is compact and flexible in structure, equipment is convenient to install and transport, and the stability and the mobility of the equipment are improved; the filter element is matched in the barrel of the desander, so that the filtering area is increased, and the desanding effect is improved.

The utility model discloses a cyclone desander which comprises a desander body, the desander body comprises a straight cylinder, a conical cylinder, a sand discharge pipe and a sand storage barrel, a water inlet pipe and a water outlet pipe are arranged on the straight cylinder, a filter screen is arranged at the bottom of the water outlet pipe, a supporting rod and a supporting plate are arranged on the sand discharge pipe, and a waterproof motor is arranged at the bottom of the supporting plate. Spiral blades are arranged on a motor shaft of the waterproof motor, a sand removing opening is formed in the bottom of the sand storage barrel, a rotating shaft is arranged in the sand storage barrel, rotating plates are arranged on the rotating shaft, a sand storage cavity is formed between every two adjacent rotating plates and the rotating shaft, a hand wheel is arranged at one end of the rotating shaft, and a limiting device is arranged on the rotating shaft; a waterproof click is arranged on a sand discharging pipe to drive a spiral blade to rotate, the sand discharging effect is promoted, gravel is prevented from blocking the sand discharging pipe, the positions of a rotating shaft and a rotating plate are fixed through a limiting device, sand is temporarily stored through a sand storage cavity, a large amount of sewage can be prevented from being discharged along with gravel, sand discharging operation can be conducted without shutdown operation, and the sand discharging efficiency is improved. And the operation efficiency is improved.

The application relates to the technical field of cyclone desanders, and discloses a high-efficiency anti-blocking cyclone desander and a use method thereof, which comprises a desander main cylinder, a water inlet pipe is arranged in the tangential direction of the periphery of the desander main cylinder, a connecting flange is arranged at the end of the water inlet pipe, a conical body is arranged at the bottom of the desander main cylinder, a sand storage hopper is arranged at the lower end of the conical body in communication, and an electric unloading valve is arranged at the bottom of the sand storage hopper. The high-efficiency anti-blocking cyclone desander and the use method thereof can perform high-pressure flushing on the sand particles accumulated in the sand storage hopper from the liquid spray cover downwards, first, the sand particles can be impacted by the water pressure impact force, so that the desander is prevented from being blocked at the hopper mouth, second, the adhering matters on the hopper wall can be washed away when the sand particles are flushed, so that the hopper wall is cleaned, and manual cleaning is not needed, and third, the water used for flushing is the residual liquid in the cylinder, so that a water source needs not to be separately provided, and the water is reasonably and effectively used on site.

A desander assembly retrievably positionable in a tubing string including a fishing neck, a bypass tool, a stop assembly configured to retrievably mate with a portion of the tubing string, an outer tubular member, and an inner tubular member. The outer tubular member has at least one aperture extending. The inner tubular member is positioned in the outer tubular member to form an annulus and so a bore of the inner tubular member is in fluid communication with the bypass tool. The inner tubular member has at least one spiral protrusion extending outwardly from the sidewall to cooperate with an interior side of the outer tubular member to form a spiral channel. The bore of the inner tubular member receives reservoir fluid that passes into the annulus formed between the inner tubular member and the outer tubular member via the apertures of the outer tubular member.

The invention discloses a novel double-barrel desander and a transportation pry, and relates to the technical field of petroleum and natural gas exploitation, and the novel double-barrel desander comprises two parallel desanding barrels, a sand barrel upper cover arranged at the upper end, a sand barrel connecting valve block connected with the front end, a cleaning outlet stop valve connected with the rear end, a sand discharging switching valve body arranged at the lower end, manual valves arranged on the two sides, and a two-inch union outlet connected with the sand discharging end. A cleaning liquid inlet pipeline is provided with a first hand valve, a second hand valve, a third hand valve, a fourth hand valve and a desanding channel liquid inlet pipe, a pressure detection instrument is arranged at the upper end of the cleaning liquid inlet pipeline, a desanding channel connecting pipe is provided with a tenth hand valve and an eleventh hand valve which are connected with a sand cylinder connecting valve block, and a sand discharging confluence block is connected with a ninth hand valve and a two-inch union inlet. A confluence transition pipe is provided with a five-eight manual valve to be connected with a desanding cylinder and an open flow main channel pipe, a main channel confluence valve body is connected with a three-inch union outlet, a pressure transmitter and the manual valve, an instrument control box is arranged at the upper end of the open flow main channel pipe, and the transportation pry comprises a frame type body, an operation platform, a crawling ladder and a top end guide hanging column, so that integrated transportation and operation are achieved.

The utility model discloses a sand prevention and removal device for natural gas exploitation, which comprises a tank body, a vibration disc used for quickly precipitating silt in the tank body is arranged at the bottom of the tank body, and a sand removal mechanism used for carrying out primary sand prevention and sand removal on natural gas and reducing the load of an existing natural gas sand remover is arranged in the tank body. A gas inlet mechanism used for being communicated with untreated natural gas is arranged at one end of the tank body, and a gas outlet mechanism used for discharging filtered natural gas and communicated with a gas inlet pipe of an existing sand remover is arranged at the end, away from the gas inlet mechanism, of the tank body; according to the utility model, primary gravel filtration of natural gas is realized through the arrangement of the desanding mechanism, and the cleaning of the desanding mechanism is realized through the arrangement of the cleaning mechanism, so that the reduction of the filtration effect caused by blockage of the desanding mechanism is prevented; by arranging the backflow mechanism, the unfiltered natural gas in the tank body is conveyed to the gas inlet pipe again to be filtered again, and loss is reduced.

The utility model discloses an oil field fracturing waste liquid desanding device, which relates to the technical field of oil field exploitation and is characterized in that a first cyclone desander is provided with a first liquid inlet, a first sand outlet and a first liquid outlet; the second cyclone desander is provided with a second liquid inlet, a second sand outlet and a second liquid outlet; the separating, filtering and settling tank is provided with a settling tank liquid inlet pipe, a settling tank first sand outlet, a settling tank second sand outlet and a settling tank liquid outlet pipe; the filter screen type filter is provided with a filter liquid inlet, a filter sand outlet and a filter liquid outlet; the water purification tank is provided with a water purification tank liquid inlet; and the sand-water separation tank is provided with a separation tank sand inlet, a separation tank sand outlet and a separation tank liquid outlet. By arranging the sand-water separation tank, accumulated sand discharged from each sand outlet is dehydrated, and separated clear water flows back to the first liquid inlet for circulation, so that the sand removal recovery rate and the clear water utilization rate of the oilfield fracturing waste liquid are improved.

The invention discloses an oil field produced liquid desanding device which comprises an inertia desander composed of an inlet pipeline, a separation pipeline and a plurality of outlet pipelines, the other end of each outlet pipeline is fixedly connected with a cyclone desander, and the bottom end of the inertia desander and the bottom end of the cyclone desander are fixedly connected with a sand storage chamber. And the top end of the cyclone desander is fixedly connected with a gas-liquid collecting chamber. According to the desanding system, an inlet pipeline is communicated with a feeding pipeline, a flow detector, a feeding valve and a feeding pressure gauge are sequentially connected from the inlet pipeline to an inlet of the feeding pipeline, a gas-liquid collecting chamber is communicated with a discharging pipeline, and a discharging valve and a discharging pressure gauge are sequentially connected from a gas-liquid outlet to an outlet of the discharging pipeline. And the sand storage chamber is respectively connected with a flushing valve and a sand discharging valve. According to the desanding device and system for the oilfield produced liquid, the problems that in the prior art, the desanding performance cannot be adjusted according to the incoming material flow, and a cyclone desander is seriously abraded and short in service life due to large-particle-size fracturing sand are solved.

The application provides a kind of ultra-deep diaphragm wall ultra-long slot section trenching construction system and trenching construction method thereof, including mud recycling system=mud recycling system includes desander, desander is communicated with hydraulic milling internal booster pump, the liquid outlet of desander is communicated with multiple desanders respectively, the slag outlet of desander and desander is communicated with purification station storage tank, the liquid outlet of desander is communicated with purification station storage tank, purification station storage tank is recycled by centrifugal filter inside, and purification station storage tank is communicated with trenching by first pump body.The reasonable configuration and application of underground diaphragm wall mud can form a good mud skin, effectively ensure the stability of diaphragm wall slot wall, remove the sediment, soil debris and other sundries in the hole, speed up the trenching efficiency, and ensure the smooth trenching of machinery.At the same time, in order to improve the efficiency of mud use and reduce the amount of waste mud disposal, mud is generally purified and recycled, and the recycling efficiency is also the key to control.

The invention relates to the technical field of mine water treatment, and discloses a mine water underground efficient coal slime settling and clear water recycling integrated system which comprises a mine water sump. The mine water sump is connected with the water inlet end of the cyclone desander through a pipeline, and the pipeline is connected with a feeding pump and a PAC feeder; a concentration tank; the integrated underground mine water treatment device is composed of a water tank, an electrochemical treatment assembly, a demulsification reactor and a water purification assembly, a partition plate is fixedly connected into the water tank, and the water tank is divided into a rough filtration chamber and a fine filtration chamber by the partition plate; the demulsification reactor is composed of a plurality of filter units, and the filter units are coupled with electrochemistry and membrane filtration design. The technical scheme provided by the invention has the advantages of efficient and rapid demulsification of emulsified oil, fundamental and long-acting inhibition of membrane pollution, and optimization of system operation cost and environmental friendliness.

A desander assembly retrievably positionable in a tubing string including a fishing neck, a bypass tool, a stop assembly configured to retrievably mate with a portion of the tubing string, an outer tubular member, and an inner tubular member. The outer tubular member has at least one aperture extending. The inner tubular member is positioned in the outer tubular member to form an annulus and so a bore of the inner tubular member is in fluid communication with the bypass tool. The inner tubular member has at least one spiral protrusion extending outwardly from the sidewall to cooperate with an interior side of the outer tubular member to form a spiral channel. The bore of the inner tubular member receives reservoir fluid that passes into the annulus formed between the inner tubular member and the outer tubular member via the apertures of the outer tubular member.

The application relates to the technical field of sand removers, and discloses a rotary filter sand remover which comprises a base, a tank body is installed on the upper surface of the base, a cover plate is installed in the tank body through bolts, two air inlet pipes are installed in the tank body, air inlet flanges are installed on the outer walls of the air inlet pipes, connecting pipes are installed in the air inlet flanges, a gas discharge flange is installed in the tank body through a pipeline, a filter cylinder is installed on the lower surface of the cover plate, a sand discharge pipe one is installed in the filter cylinder, helical blades are installed on the outer wall of the filter cylinder, a collecting hopper is arranged on the lower side of the filter cylinder, and a cleaning mechanism is arranged in the filter cylinder. The large sand and stones are collected by the collecting hopper, the small sand and stones are collected at the bottom of the filter cylinder, are discharged separately, the overall sand removal efficiency and the flow capacity are improved, the cleaning mechanism is operated by the airflow thrust in the tank body, the adhered sand and stones are automatically removed, the filter cylinder is prevented from being blocked, and the airflow is smooth and the treatment flow is stable.

The sand storage tank comprises an upper tank barrel, a lower tank barrel and a pressure pump, the bottom of the upper tank barrel is connected with the lower tank barrel through a bolt, the bottom of the lower tank barrel is connected with the pressure pump through a pipeline, an opening and closing valve is arranged at the joint of the lower tank barrel and the pipeline, and a supporting frame is arranged on the upper portion in the upper tank barrel. The upper part of the support frame is provided with a dispersion assembly with a conical-column-shaped structure, so that the unscrewed gravel and sundries are brought out of the water outlet again under the combined action of centripetal force, buoyancy and fluid drag force, slide out through the blocking action of the dispersion assembly and the circumferential dispersion of the dispersion assembly, and then slide out through the acceleration of the spiral dredging plate and are collected into the lower tank barrel; the problems that the falling speed is low and falling scattering is not concentrated are solved, and the technical effect that gravel and sundries can be collected into the lower tank barrel through rotational flow conveying of the spiral dredging plate is achieved.

The present application relates to the technical field of drilling mud purification, and discloses a sand remover for geothermal drilling, which comprises a sand removing tank, and further comprises an alternate sand removing unit, a sand discharging unit and a sand pushing unit; the alternate sand removing unit is arranged in the sand removing tank and is used for filtering sand particles in mud; the alternate sand removing unit comprises a separation component arranged in the sand removing tank and used for controlling the flow direction of mud; the separation component comprises a partition plate arranged on the inner wall of the bottom of the sand removing tank, an inclined plate arranged on the top of the partition plate and fixed to the side wall of the sand removing tank away from the partition plate, and an inverted U-shaped plate arranged on the inner wall of the bottom of the sand removing tank; the two filtering areas are alternately used to avoid the clogging of the filtering component, so that the filtering can be continuously and uninterruptedly performed, and the first filtering plate and the second filtering plate are mutually staggered to push the sand particles in the first filtering hole and the second filtering hole out.

The utility model discloses a jet type desander which comprises a cylinder body and a lifting assembly, supporting legs are arranged on the outer wall of the bottom of the cylinder body, the lifting assembly used for adjusting the cleaning range is installed in the cylinder body, and the lifting assembly comprises a motor box, a motor gear, a tooth groove, a lifting column, a water supply pipe and a hose. A motor gear is rotatably mounted in the motor box, the left side of the motor gear is in meshed connection with a tooth groove, a lifting column is arranged outside the tooth groove, a water supply pipe is arranged in the right side of the lifting column, the top end of the water supply pipe is in through connection with a hose, and the lifting column is slidably connected with the motor box through the motor gear; and a water supply seat is mounted at the tail end of the lifting column. According to the jet type sand remover, not only can the height of the spray head be adjusted, but also stubborn particles can be scraped.

The invention discloses a desander with a clamping type structure capable of quickly replacing a desanding cyclone, which comprises a movable mounting chamber I, a movable mounting chamber II, a sand setting chamber and an inserting frame, the movable mounting chamber I and the movable mounting chamber II are hermetically mounted through two sealing plates to form a cyclone chamber, the sand setting chamber is arranged at the bottom of the cyclone chamber, and the inserting frame is arranged at the bottom of the cyclone chamber. A sealing inserting cylinder is arranged on the inner wall of the sealing plate located at the bottom, a barrel-shaped inserting groove is formed in the inner wall of the bottom of the first movable installation chamber, the sealing inserting cylinder and the barrel-shaped inserting groove are installed in a sealing and inserting mode, and when the first movable installation chamber and the second movable installation chamber are installed in a butt joint mode, the sealing performance of connection between the first movable installation chamber and the second movable installation chamber is improved; the tensioning assembly is improved to rapidly sleeve and install the fixing column, it is guaranteed that the first movable installation chamber and the second movable installation chamber are fixedly installed, during disassembly, the sleeving assembly which is installed in a sleeving mode is released, the rotating shaft is rotated to enable the sleeving assembly to be lifted, and then the first movable installation chamber and the second movable installation chamber are disassembled and separated, so that maintenance or cleaning of the interior of the rotational flow chamber is achieved.

The utility model relates to the technical field of petroleum production, in particular to an inclined plate precipitation synergistic sand remover. According to the technical scheme, the lower portion of a machine body is connected with a discharging hopper through a collecting hopper, the bottom end of the machine body is supported and erected through a second support, a first support is installed in the machine body, an inclined plate is installed in the machine body through the first support, and a deflection mechanism is arranged on the inclined plate; the inclined plate deflects in the machine body through a deflection mechanism and a transmission mechanism, a filter box is erected above the inclined plate, one end of the filter box is connected with a liquid outlet pipe, the end, away from the filter box, of the liquid outlet pipe penetrates through the machine body, and a liquid inlet pipe is arranged at the position, located on the inclined plate, of the machine body. According to the utility model, the deflectable design of the inclined plate is matched with the transmission mechanism, so that automatic sand cleaning and flexible angle adjustment are realized; in combination with secondary filtration of the filter box, the desanding efficiency and the liquid cleanliness are remarkably improved, and various requirements of petroleum production are met.

A desander for a downhole assembly according to one disclosed non-limiting embodiment of the present disclosure includes a body that defines an axis; a support within the body; a sand downpipe within the body that extends from a sand downpipe inlet to a sand downpipe exit displaced from the sand downpipe inlet, the sand downpipe mounted to the support; and a solid-free intake to receive solid-free fluid from an upper body chamber.

The utility model relates to the technical field of petroleum desanding, in particular to a backwashing cyclone desander which comprises a desander shell, a base plate and a stepping motor, the included angle between the inner wall of the lower portion of the desander shell and the vertical direction and the included angle between the inner wall of a discharging shell and the vertical direction are 15-20 degrees, and treated gravel is settled and accumulated in the area, at the top of a pressing table, of the discharging shell. An electric telescopic rod device drives a pressing table and an upper lantern ring to move upwards till a discharging gap is formed between a rubber ring fixedly arranged on the outer side of the pressing table and the inner wall of a discharging shell, a stepping motor is started to drive a shaft rod and a driving fluted disc to rotate, and a driven fluted disc, a connecting ring, the discharging shell, a hemispherical block and a ring are an integrated rotating sand discharging piece. The driving fluted disc and the driven fluted disc are meshed to drive the integrated rotary sand discharging piece to rotate, and due to the arrangement, the structural body can conveniently conduct anti-blocking stirring and discharging on gravel accumulated at the bottom of the backwashing cyclone desander, and the gravel discharging efficiency is improved.

The desander comprises a desanding cleaning box, a motor, a cleaning plate, a net frame and a water outlet pipe, the right side of the water outlet pipe penetrates to the inner side of the desanding cleaning box to be communicated with the desanding cleaning box, and the bottom of the motor is fixedly connected with the top of the desanding cleaning box. The top of the cleaning plate is fixedly connected with the output end of a motor, and the two sides of the screen frame are fixedly connected with the tops of the two sides of the inner wall of the desanding cleaning box. By arranging the transmission rod, the unblocking disc on the right side of the transmission rod moves into the water outlet pipe, then the transmission rod moves rightwards, and therefore the unblocking disc is driven to move rightwards on the inner wall of the water outlet pipe to unblock the water outlet pipe. And if the surface of the currently cleaned part is too much in silt and dirt, the interior of the water outlet pipe is easily blocked, and sewage cannot be discharged at the moment, so that the cleaning efficiency is reduced, and the effect of auxiliary blockage cleaning is achieved.

A kind of pulping high-efficiency sand removal system, including base plate and support frame, support frame is arranged on the base plate, sand remover is arranged on the support frame, throttle is arranged at the lower end of the sand remover, the upper portion of the sand remover is provided with input pipe, the top end of the sand remover is provided with output pipe, first water pump is arranged on the input pipe;Throttle below is provided with integrated pipe, the integrated pipe below is provided with buffer structure, the buffer structure below is provided with receiving hopper, the receiving hopper below is provided with distribution bin, the bottom end of the distribution bin is provided with collection groove, the flow rate of sand discharge is accurately controlled by throttle, and the residence time of slurry is extended;Combining buffer structure periodic dumping and distribution bin initial speed separation, make tailings ash content from 50% to more than 70%, reduce subsequent processing cost;Circulation pipe design reduces slurry waste by more than 15%, and the overall sand removal efficiency is improved by 30%.