34results about How to "Prevent stuck pump" patented technology

The invention provides a long-plunger type dual-barrel coal-dust resistant discharging and extracting pump capable of preventing eccentric wear and coal dust from burying pump, blocking pump and prolonging the pump detection period. The pump consists of a centering body, a pump barrel assembly, a piston assembly, a liquid outlet valve and a liquid inlet valve assembly; a centering locking claw is inserted in a lock sleeve of an upper coupling to realize positioning and sealing of the centering body and avoiding eccentric wear between the plunger and the pump barrel; an internal barrel can prevent the deposited coal dust in the annulus of a bar pipe from entering the gap between the plunger and the pump barrel; the coal dust is dropped back to a tail pipe through the annual cavity between the external barrel and the pump barrel to prevent the coal dust from burying the pump; the structure of the long-plunger short pump barrel can promptly discharge the coal dust in the gap between the plunger and the pump barrel, so as to protect the internal and external working surfaces of the pump barrel and preventing the pump from being blocked; the well liquid stored in the coal-dust resistant tank washes the coal dust in the liquid outlet valve cover and the coal dust deposited at the upper part of the liquid outlet valve through a jet orifice, so as to realize an automatic washing function of the liquid outlet valve and preventing the coal dust from jamming the pump; and a spring is cooperated with a liquid inlet valve ball positioning pin, so that the liquid inlet valve ball can be fast reset, and the pump valve under a low submergence can be realized in smooth on and off.

The invention discloses a separation and crushing device of downhole pulverized coals of coalbed methane and a method thereof. The settling separation, the crushing and the filtration are performed for the pulverized coals, so that the particle size of the pulverized coals entering a screw pump reaches a normal working range of the screw pump, the accidents of pump blockage, blockage and abrasion caused by the pulverized coals with larger particles entering the screw pump can be effectively prevented, the pump detecting period is prolonged, the development cost of the coalbed methane is reduced, and the blockage of holes of a coalbed methane well by the pulverized coals is prevented; and the device has the advantages of simple structure, convenience for use and high efficiency.

The invention discloses a salt recrystallization inhibitor for an oil and gas well. The salt recrystallization inhibitor is prepared from the following components according to the 100 percent proportion of volume sum: 60 to 80 parts of organo metallic complex, 10 to 35 parts of inorganic complex, 2 to 8 parts of corrosion inhibitor and 2 to 8 parts of antiswelling agent. A preparation method of the salt recrystallization inhibitor for the oil and gas well is characterized by comprising the following steps of firstly, taking the components according to the proportion, and sequentially placing the various taken component raw materials into a reaction kettle; secondly, reacting at the temperature of 50 to 90DEG C; thirdly, drying a product obtained by reaction and synthesis; fourthly, crushing the dried product to obtain the inhibitor. The shape of a sodium chloride crystal can be changed from a cubic shape into a branch shape or a snowflake shape, so that the adhesive power of the crystal on a solid surface is reduced, and further the dissolubility of sodium chloride in water is increased; in addition, the salt recrystallization inhibitor is free of influence from calcium and magnesium ions, and salt block or holddown can be effectively prevented.

The invention discloses a downhole cyclone desander, the structure of which is divided into inner and outer pipes, the outer pipe is provided with an oil inlet hole, the outer wall of the inner pipe is provided with spiral leaves, and the lower part of the inner pipe is reduced in diameter as an oil suction port. A filter screen is arranged between the inner pipe and the outer pipe. Since the silt with larger particles is on the outside during swirling flow, the outer ring of the filter screen is a coarse-aperture net, and the inner ring of the filter screen is a fine-aperture net. The beneficial effect of the invention is that the mud and sand can be effectively separated from the oil, and a filter screen is arranged between the inner and outer pipes to prevent the mud and sand from being sucked in and causing the pump to be stuck during oil pumping.

The invention provides a hollow anti-scale oil pump which can effectively prevent scale deposition as well as preventing pumping from being blocked during pumping oil, so as to decrease the repair and maintenance cost of an oil production device as well as ensuring smooth oil production work. The hollow anti-scale oil pump comprises a pump barrel assembly, a long plunger piston assembly and a fixing valve assembly; the pump barrel assembly comprises an oil pipe coupling, an upper lengthening pumping barrel, a pump barrel coupling, a short pump barrel, and a lower lengthening pump barrel on the lower surface of the short pump barrel; the long plunger piston assembly comprises a hollow short rod, an upper reducing coupling, an upper one-way valve device, an one-way valve bus, an upper valve seat connector, a pulling rod bus, a hollow pulling rod, an oil outlet cover, a plunger piston, a floating valve seat, a floating valve ball, a lower reducing coupling, a lower one-way valve device and a piston block; the upper one-way valve device and the lower one-way valve device both comprise connectors, valve balls arranged in the connectors, and valve seats; the fixing valve assembly comprises a pump barrel valve cover, a fixing valve ball, a fixing valve seat and a pump barrel valve cover reducing connector.

The invention relates to an anti-scaling and anti-sand device connected with an oil pumping tubing string into a whole and an application method. The device comprises an oil well tubing, an oil well pump, a gas anchor and an end cap, wherein the oil well tubing is connected with the anti-scaling and anti-sand device, the anti-scaling and anti-sand device is connected with a tubing pup joint, the tubing pup joint is connected with the oil well pump, an outer tube of the oil well pump is connected with the gas anchor, the outer tube of the gas anchor is connected with the end cap, an upper joint of the anti-scaling and anti-sand device is connected with the oil well tubing through a tube ferrule, the upper joint is connected with an annular anti-scaling cover, a central tube is inserted in the middle of the annular anti-scaling cover, the outer diameter of the central tube is connected with the inner wall of the annular anti-scaling cover through a centering ring, and the bottom part of the annular anti-scaling cover is connected with a trumpet-shaped lower joint. The device has simple structure and low cost, an annular sand setting space is formed between the inner wall and the outer wall of the anti-scaling and anti-sand device, liquid flow is discharged from inner tubes to the outer tubes, and scales, sand and impurities settled from liquid are retained in the anti-scaling and anti-sand annular space, thereby preventing the pump from being locked during the pump-setting process and the production process of an oil well, effectively prolonging the pump detection period of the oil well and improving the oil production efficiency.

The invention provides a sand and gas preventing oil pump, which comprises a pump cylinder assembly, wherein a sliding plunger assembly is arranged in the pump cylinder assembly; a gas-liquid separation assembly is arranged at an end of the pump cylinder assembly; a liquid feeding channel is formed in one side of the gas-liquid separation assembly; oil containing sand and gas enters the pump cylinder assembly via the liquid feeding channel; and a short plunger in the plunger assembly abuts against the interior of the pump cylinder assembly and slides hermetically, thereby forming a multi-stage sand settling and exhausting compression cavity. By adopting a three-stage sand prevention and two-stage gas prevention structure, the oil pump can adapt to crude oil extraction under a well condition of serious sand production, also has a good gas prevention effect, belongs to a special oil pump, can adapt to crude oil extraction under a well condition of serious sand production and high gas ratio, achieves a good sand prevention and gas prevention effect, and has a high bearing capacity and a long service life.

The invention discloses a flushable blockage removing and sand filtering device and a blockage removing and sand filtering pipe column. The flushable blockage removing and sand filtering device comprises a central pipe and outer pipes arranged on the outer side of the central pipe in a sleeving mode at intervals; the intervals form an annular cavity; and a spring, a supporting sleeve and a sand blocking stacked ring assembly are arranged in the annular cavity in a sleeved mode. A plurality of first liquid passing holes and a plurality of second liquid passing holes are formed in the side walls of the central pipe and the outer pipes correspondingly, the sand blocking stacked ring assembly comprises a plurality of sand blocking ring pieces which are stacked up and down, a plurality of upper through grooves and a plurality of lower through grooves are formed in the upper end face and the lower end face of each sand blocking ring piece at intervals correspondingly, and the longitudinal extension lines of the upper through grooves and the lower through grooves are arranged in an up-down crossed mode. According to the flushable blockage removing and sand filtering device and the blockage removing and sand filtering pipe column, the sand blocking particle size can be designed to be small, so that the situation that sand enters a pump to cause pump clamping is prevented; and when an overflowing channel is blocked, blocking objects can be washed away in a liquid beating washing mode, so that the sand blocking and overflowing capacity is recovered.

The invention discloses an inclined shaft sand prevention oil well pump. The inclined shaft sand prevention oil well pump comprises a plunger assembly and a pump cylinder assembly, a pump cylinder comprises a gap bridge pipe, a middle coupling and a two-way connector, a pump cylinder lengthening cylinder is arranged in the pump cylinder assembly, a sand setting annulus is formed between the pump cylinder lengthening cylinder and the gap bridge pipe, a short pump cylinder is arranged at the upper end of the pump cylinder lengthening cylinder, the short pump cylinder and a long plunger are in sliding seal, an oil inlet valve cover is arranged in the middle coupling, the oil inlet valve cover and the two-way connector form a sand falling annulus, a check block is arranged above the oil inletvalve cover, the outer circumferential ring of the check block is a conical surface structure, when sand grains in the pump cavity are deposited downwards, the sand can slide into a sand falling annulus space on the outer side of the oil inlet valve cover along the outer conical surface of the stop block, when sand grains in an oil pipe on the upper portion of the oil well pump fall onto the upperoil outlet valve cover, the sand grains can slide into the annular sand setting annulus space on the two sides along the upper conical surface of the upper oil outlet valve cover and cannot directlyfall into the upper oil outlet valve cover or the matching surface between the pump cylinder and the long plunger, so that the phenomenon that the sand grains enter the pump to cause sand blocking ordeposit on the valve cover to cause sand burying is reduced.

The invention refers to an anti-sand device used for an oilfield well. Especially, the invention relates to a novel anti-settling sand stuck pump device, wherein the technical scheme of the novel anti-settling sand stuck pump device is that: the device consists of a taper body, a taper base, a valve body, a fixing base, a valve ball and a joint; one end of the fixing base is connected with the joint, and the other end of the fixing base is connected with the taper base by screw thread; the valve body is fixed at the inner part of the taper base, the valve ball is arranged in the valve body; the valve body is vertically provided with a liquid through hole. The novel anti-settling sand stuck pump device has the following beneficial effects: the novel anti-settling sand stuck pump device is reasonable in structural design and good in anti-sand effect; the problem that the grit enters the pump along with the output liquid is effectively solved; the stuck pump is prevented; the device can be freely lifted up and down along with a sucker rod; so that the other work cannot be affected, and any other additional work load cannot be taken to the work.

The invention discloses an anti-jamming and anti-deviation tubular oil well pump, which comprises a casing, a plunger, a pump barrel, an oil pipe, and a centering hoop. The inside of the casing is provided with an oil pipe, and the bottom of the oil pipe is provided with a pump barrel. The pump barrel is provided with a second valve seat, a second through hole is opened in the middle of the second valve seat, and a second valve ball is arranged above the second through hole; a plunger is inserted in the pump barrel , a centralizing collar is provided between the plunger and the inner wall of the oil pipe, a first valve seat is provided inside the plunger, a first through hole is opened in the middle of the first valve seat, and a first through hole is provided above the first through hole. There is a first valve ball; a first swirl structure and a second swirl structure are arranged above the first valve ball and the second valve ball respectively. The structure design of the present invention is reasonable, and by setting the centering section hoop and centering body, it is convenient to center the plunger and prevent deviation from hitting the edge of the pump barrel; the swirl structure makes the passing crude oil to be absorbed form a vortex, so that coal powder or gravel is suspended in the liquid flow , and is carried away, thus preventing stuck pumps.

The invention belongs to a sand blockage-preventing pumping-increasing oil pump device used in an underground oil field production well, wherein a pump barrel is in the shape of a cylinder; an upper expanding ring and a lower expanding ring are provided with screw threads inside; the ring wall of each ring is provided with an opening in longitudinal direction; a pump cap is a cylindrical body with the top provided with internal threads; the periphery of a pump cap cylinder is provided with external threads, while the internal lower part is provided with internal threads; a valve ball is a spherical body; a pump body is a cylindrical body with the center provided with a through hole and the periphery of the lower part is provided with external threads. The lower expanding ring and the upper expanding ring are screwed in the periphery of the upper part of the pump cap, while the valve ball is arranged inside the pump cap; the upper part of the pump body is assembled together with the lower part of the pump cap; the external threads of the lower part of the pump body is screwed in the screw holes of the lower expanding ring and the upper expanding ring; the pump cap is fixed with the pump body and is arranged inside the pump barrel; moreover, the periphery of each end of the defueling pump is provided with an expanding ring. Obviously, the gap of the pump barrel is closed under the expansion action and the contraction action of the expanding ring. The sand blockage-preventing pumping-increasing oil pump device prevents oil return during pumping oil and also prevents sand from blocking a pump, thereby reducing well repair frequency, saving service charge and increasing oil production to 8 to 20 percent.

The invention discloses a foreline for a vacuum pump, a vacuum system and semiconductor manufacturing equipment. The foreline comprises a main pipe, a receiver and a branch pipe. The main pipe is vertically mounted. The receiver is arranged at the bottom of the main pipe and provided with an opening, and the opening and the bottom of the main pipe are in sealed connection. The branch pipe is a non-linear pipeline, one end of the branch pipe is connected with the main pipe, and the other end of the branch pipe is connected with the vacuum pump. Airflow is used for sequentially passing through the main pipe and the branch pipe to enter the vacuum pump, meanwhile the receiver is used for receiving matter falling when the airflow passes through the main pipe through the opening. The foreline has the beneficial effects that dust of the airflow carrying a large quantity of dust impurities is filtered out in the foreline, then the airflow enters the vacuum pump, the dust entering a pump bodyis reduced, the possibility of the holddown phenomenon is reduced, the continuous operation time of the vacuum pump is prolonged, the capacity is improved, and the economic cost is reduced.

The invention provides a hydraulic force feedback-type discharge and mining pump preventing pulverized coal used for discharge and mining of a coal-bed gas well. The discharge and mining pump mostly comprises a pump cylinder assembly, a plunger assembly and capsule assemblies. During upstroke of the discharge and mining pump, a discharge and mining rod drives the plunger to move upwards and a floating valve is closed. A fixed valve is opened under effect of pressure difference and liquid is absorbed. In the meantime, press rings on capsules are separated from the capsules and the capsules are swelled under elasticity of springs and liquid is absorbed through a filter net and a check valve so that liquid is stored in the capsules. During downstroke, the discharge and mining rod drives a plunger to move downwards and the fixed valve is closed. After the floating valve is opened, liquid below the plunger enters the upper part of the plunger via the floating valve and liquid is discharged. While a press rod and a press ring move downwards to touch the capsule assemblies, the capsule assemblies are extruded. Liquid in the capsules are compressed to feedback liquid flowing channels and sprayed out of the check valve. Pulverized coal particles falling down to a fixed valve seat are flushed and the plunger is driven to suck such that pulverized coal can be discharged. The pump is not buried and stuck by pulverized coal.

The invention provides a gas-liquid-solid separation device in a shaft. The upper end of an outer pipe is connected to an upper connector through matching with an outer buckle, and a plurality of liquid inlet holes penetrating through the outer pipe are formed in the upper end of the outer pipe; an inner pipe is inserted into the outer pipe and is spaced from the outer pipe, and the upper end of the inner pipe is connected to the upper connector through matching with an inner buckle; a diameter expanding short section is connected to the lower end of the inner pipe so as to be suspended in theouter pipe; the inner pipe, the diameter expanding short section and the outer pipe jointly define an inner pipe annular space and an outer pipe annular space, and the inner pipe annular space and the outer pipe annular space meet the preset flow area; the flow area of the diameter expanding short section is not smaller than the flow area of an externally-connected upper pump oil pipe; a lower connector is connected to the lower end of the outer pipe through a screw thread; and the lower end of a lifting short section is connected to the upper end of the upper connector in an inserted mode, and an oil pipe section hoop is connected to the upper end of the lifting short section in a sleeving mode. The invention further provides a design method of the gas-liquid-solid separation device in the shaft. Compared with the prior art, the gas-liquid-solid separation device in the shaft is good in reliability and long in service life.