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

The invention discloses an oil well sand prevention method for a heavy oil reservoir, which is applied to heavy oil exploitation in oil fields. The method comprises the following steps of: preparing, namely pulling a production pipe column out, inserting a sand removal pipe column, exploring a sand surface, removing sand, throwing a ball for pressure tests, and pulling the sand removal pipe column out; pigging, cleaning a pipe, washing a well, and pulling a pigging pipe column out; performing sand prevention construction, namely inserting a sand prevention pipe column for magnetic positioning depth calibration; making the pressure tests qualified; performing seat sealing, and opening a filling channel; filling direct circulation sand carrying liquid and quartz sand; washing hands, lifting the sand prevention pipe column upwards and pulling a hand washing pipe column; and inserting an oil exploitation production pipe column into the whole well. The invention has the advantages that: the method is applied to oil well sand prevention and has the one-time success rate of 100 percent, and a single well can be used for continuous production for more than 600 days.

The invention provides a clamping jaw type spiral tooth centering device of a coal bed gas well drainage mining pump, and applies to underground centering of the plunger and the pump cylinder. The centering device adopts a spiral tooth stirring and clamping jaw type butt joint technology, the low-sink-degree working condition coal powder can be effectively prevented from being deposited on the upper portion of the plunger and the middle cover body, and the coal powder clamping pump is avoided. The middle cover body is discharged according to the jet nozzles which are arranged in a layered modepumping the well liquid sucked by the pump into the annular space of the discharging and collecting rod and the discharging and collecting pipe, the spiral tooth stirrer is used for realizing the upper limit of the middle cover body and realizing the lower limit by centering the middle coupling, the centering base body is connected with the centering cover body and the butt joint clamping jaw ina three-in-one mode, the centering base body and the butt joint clamping jaw are arranged in a three-in-one mode, the butt joint clamping jaw realizes rapid butt joint between the middle cover body and the centering base body and the centering coupling, and meanwhile, the underground real-time alignment between the plunger and the drainage rod and the pump barrel is realized according to the double-column-surface moving pair between the centering coupling and the centering cover and the drainage rod, and the lifting speed of the well liquid above the plunger is completed through the middle coupling.

The invention relates to a gapless self-adapting scraper assembly. The problems that existing scrapers cannot adapt to the diameter of a pump barrel and a pump is jammed easily are solved. The scraper assembly is characterized in that an upper scraper (2) is arranged outside an upper connecting rod (1), a lower scraper (4) is arranged outside a middle connecting rod (5), the lower portion of a lower connecting rod (7) is connected with a plunger (10), a leather cup (8) is arranged outside the lower connecting rod (7), a plurality of flow channels (9) are arranged on the side wall of the leather cup (8), a groove is arranged on the outer periphery of an inner mandrel (11) of the scraper, a centering supporting body (13) is embedded in the groove, a scrapping sheet (14) is fixed on the side surface of the centering supporting body (13) and a spring (15) is arranged between the centering supporting body (13) and the mandrel (11) radially. The gapless self-adapting scraper assembly can scrap completely, no gap exists, the scraper can adapt to pump barrels with different diameters, scraped dirt can flow out of a well along with well liquid and pumps cannot be jammed.

The invention provides a gas-liquid-solid separation device in a wellbore. The upper end of the outer pipe is connected to the upper joint by being assembled with an outer buckle, and the upper end of the outer pipe is provided with a plurality of liquid inlet holes penetrating through it; The outer tube is in and spaced apart from each other, the upper end of the inner tube is connected to the upper joint by assembling with the inner buckle; the expansion joint is connected to the lower end of the inner tube to be suspended in the outer tube; the inner tube, the expansion joint and the outer tube together form an inner and outer tube. Pipe annulus, and the inner and outer pipe annulus satisfies the preset flow area; the flow area of ​​the expansion joint is not less than the flow area of ​​the external upper pump oil pipe; the lower joint is connected to the lower end of the outer pipe through a thread; The lower end of the short joint is inserted and connected to the upper end of the upper joint, and the oil pipe joint hoop is sleeved and connected to the upper end of the lifting short joint. The invention also provides a design method of the gas-liquid-solid separation device in the wellbore. Compared with the related art, the gas-liquid-solid separation device in the wellbore of the present invention has good reliability and long service life.

The invention relates to a multifunctional double-acting hydraulic oil producing device which is characterized in that a two-way oil-well pump is placed in an oil well running casing, a long plunger piston is arranged in the two-way oil-well pump, a hollow draw rod is arranged on the long plunger piston, and pistons and hydraulic cylinders are arranged in the hollow draw bar; a two-way oil-well pump barrel is arranged between every two hydraulic cylinders, a traveling oil outlet valve is arranged on the hollow draw rod, and fixed oil inlet valves are arranged on sealing end covers; the hydraulic cylinders are connected with the two-way oil-well pump barrels through the sealing end covers, the pump barrels are connected with the hydraulic cylinders through the sealing end covers, the fixed oil inlet valves are arranged on the sealing end covers, and the long plunger piston and the pistons are connected through the hollow draw rod; and the travelling oil outlet valve is arranged on the hollow draw rod, a packer is connected with an overflow valve, the overflow valve is connected with a bayonet socket, the bayonet socket is connected with an oil tube until being connected with a well port. The hydraulic cylinders are used as driving force to drive the two-way pump plunger piston to synchronously move, and two-way oil inlet and outlet during up and down strokes are actually achieved. The invention has the characteristics of no eccentric wear between the oil pumping rod and the oil tube, energy saving and high production efficiency.

The invention provides a coal powder-prevention tubular discharging and extracting pump for pumping liquid in coal bed gas wells, which especially can prevent coal powder from burying pump, blocking the pump and extending the period of pump inspection. The coal powder-prevention tubular discharging and extracting pump comprises a pump cylinder assembly, a plunger assembly, a liquid inlet valve assembly and a fixing device. A hemispherical valve ball enlarges the flow area of a pump valve, improves the speed for well liquid to enter the pump, is beneficial to the discharging of well liquid outof the pump together with the coal powder to prevent the coal powder from blocking the pump; a resetting spring is matched with a positioning pin to reinforce the resetting capacity of the valve ballso that the tubular discharging and extracting pump reduces loss and realizes the purpose of smoothly opening the pump valve under low sinking degree; a coal powder-prevention slot can temporarily contain the coal powder to reduce the abrasion of the coal powder for plungers and pump cylinders; the bottom of the coal powder-prevention slot is provided with jetting holes so that the coal powder ina valve cover is washed by utilizing the well liquid stored in the slot, thereby the discharging and extracting pump realizes the function of self washing to prevent the blockage of the liquid inlet valve from blocking the pump; and a stirrer drives vanes to rotate along with the reciprocating motion of a plunger of the liquid inlet valve to constantly stir the well liquid and deposited coal powder in a sieve tube, thereby preventing coal powder particles from rapidly settling in the sieve tube to result in that the pump is buried by the coal powder.

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 an antiscale oil pumping system for a three-component compound flooding well. Scales can be effectively prevented from being deposited, the stuck pump phenomenon in the oil pumping process is avoided, the repairing and maintaining cost of oil production equipment is lowered, and it can be better guaranteed that oil production operation is conducted smoothly. The antiscale oil pumping system for the three-component compound flooding well comprises a chemical dosing device, a liquid injecting device, an oil well pump, an oil tube, an oil pumping rod and a hollow sliding rod, wherein the oil pumping rod and the hollow sliding rod are arranged in the oil tube. The upper portion of the liquid injecting device is communicated with a chemical dosing pipeline of the chemical dosing device through a tee joint, the lower portion of the liquid injecting device is communicated with the oil pumping rod of a hollow structure, and the lower end of the liquid injecting device is provided with a plug cap in a packaging mode, and a through liquid injecting channel is formed in the liquid injecting device. The oil well pump comprises a pump barrel assembly, a plunger assembly and a fixed valve assembly. The upper end and the lower end of the oil well pump are connected with a thickened oil tube and a tail tube through a coupling and a fixed valve cover respectively. An antiscale device is arranged on the hollow sliding rod in the oil tube, and the antiscale device comprises a scale scraping mechanism and a scale blocking and storing mechanism.

A small-displacement rod type oil well pump with an annular plunger comprises an outer pump barrel, an inner pump barrel and the annular plunger. The upper end of the outer pump barrel is connected with a supporting leather cup assembly through a lengthening coupling, and the lower end of the outer pump barrel is connected with a valve housing of an oil inlet valve through a pump barrel coupling. The upper end of the inner pump barrel is connected with a sealing segment joint, and the lower end of the inner pump barrel is connected with the pump barrel coupling through a valve housing of an oil outlet valve. An annular work cavity is formed between the inner pump barrel and the outer pump barrel, the annular plunger is in small clearance fit with the inner pump barrel and the outer pump barrel, the annular plunger is connected with a valve rod through a valve rod lower joint, and the lower end of the valve housing of the oil inlet valve is connected with a tail pipe joint in a threaded mode through the lower joint. The annular plunger moves upwards along with the oil pump, an oil outlet valve ball is closed, an oil inlet valve ball is opened, well fluid is sucked in, fluid with a receding size of the plunger is discharged out of a well mouth, the oil inlet valve is closed, and well fluid stops from entering. In the downstroke, fluid in a pump cavity is extruded downward, and liquid is discharged into an oil pipe through a liquid outlet of a valve rod guiding sleeve after passing through the oil outlet valve assembly. The small-displacement rod type oil well pump with the annular plunger has the advantages of being high in efficiency and free of pump seizure and blocking.

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.