CN114458592A - Oil-sand separation type oil well pump - Google Patents
Oil-sand separation type oil well pump Download PDFInfo
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- CN114458592A CN114458592A CN202210111185.8A CN202210111185A CN114458592A CN 114458592 A CN114458592 A CN 114458592A CN 202210111185 A CN202210111185 A CN 202210111185A CN 114458592 A CN114458592 A CN 114458592A
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- sand
- pump body
- well pump
- shell
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- 238000000926 separation method Methods 0.000 title claims abstract description 67
- 239000003027 oil sand Substances 0.000 title claims abstract description 62
- 239000003129 oil well Substances 0.000 title claims abstract description 55
- 239000003921 oil Substances 0.000 claims abstract description 64
- 239000004576 sand Substances 0.000 claims abstract description 42
- 239000010779 crude oil Substances 0.000 claims abstract description 29
- 238000007789 sealing Methods 0.000 claims abstract description 23
- 238000001914 filtration Methods 0.000 claims description 32
- 239000013049 sediment Substances 0.000 claims description 10
- 239000002245 particle Substances 0.000 claims description 8
- 238000000034 method Methods 0.000 claims description 5
- 230000003139 buffering effect Effects 0.000 claims description 3
- 230000000903 blocking effect Effects 0.000 abstract description 6
- 239000004575 stone Substances 0.000 abstract description 4
- 238000010276 construction Methods 0.000 abstract description 3
- 239000012530 fluid Substances 0.000 description 6
- 238000010586 diagram Methods 0.000 description 4
- 239000007788 liquid Substances 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 238000005086 pumping Methods 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 230000004323 axial length Effects 0.000 description 2
- 238000004891 communication Methods 0.000 description 2
- 239000008187 granular material Substances 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000002265 prevention Effects 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000002035 prolonged effect Effects 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000000314 lubricant Substances 0.000 description 1
- 230000001050 lubricating effect Effects 0.000 description 1
- 238000005461 lubrication Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B53/00—Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00
- F04B53/20—Filtering
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/34—Arrangements for separating materials produced by the well
- E21B43/35—Arrangements for separating materials produced by the well specially adapted for separating solids
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B47/00—Pumps or pumping installations specially adapted for raising fluids from great depths, e.g. well pumps
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B47/00—Pumps or pumping installations specially adapted for raising fluids from great depths, e.g. well pumps
- F04B47/005—Sand trap arrangements
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B53/00—Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00
- F04B53/10—Valves; Arrangement of valves
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Details Of Reciprocating Pumps (AREA)
Abstract
The invention relates to the technical field of oil-well pumps, in particular to an oil-sand separation type oil-well pump which comprises a shell with an opening at the top and an oil inlet arranged at the bottom of the shell and used for crude oil to enter; the oil-sand separation device comprises a shell, a pump body, a sealing circulating piece and an oil-sand separation structure, wherein the pump body is arranged in the shell and can move up and down; the pump body, the sealing circulating piece and the oil-sand separating structure are sequentially connected and communicated from top to bottom; the top of the pump body is provided with a discharge port, and the bottom of the pump body is provided with a discharge valve used for controlling whether the pump body is communicated with the sealed circulating piece or not; the oil-sand separating structure is connected with a suction valve for opening and closing the oil inlet. The oil-sand separation structure has the advantages of simple and reasonable overall structure, simple and convenient construction and low cost, and can effectively remove sand and stone in crude oil, reduce sand blocking and sanding phenomena and prolong the service life of an oil well pump.
Description
Technical Field
The invention relates to the technical field of oil-well pumps, in particular to an oil-sand separation type oil-well pump.
Background
The oil well pump is used as main oil extraction equipment, and is a reciprocating pump, and is characterized by that it can transfer the power from ground surface through pumping rod to underground, and make the plunger of oil well pump implement up-and-down reciprocating motion to lift the crude oil in the oil well along the oil pipe to ground surface. The double-acting oil well pump can finish oil suction and oil discharge twice in one reciprocating stroke, and compared with the conventional oil well pump with completely the same pump diameter and working parameters, the double-acting oil well pump greatly improves the liquid production amount, but the conventional double-acting oil well pump has the problems of complex structure, difficult processing, short service life and the like, so that the double-acting oil well pump cannot be widely applied.
In addition, the sand production condition of oil reservoirs of a plurality of oil fields in China is more and more serious, the sand content in crude oil is more and more, the phenomenon of sand blocking and sanding easily occurs, and the oil well operation is influenced. And current double-acting oil-well pump is at the in-process of pumping, and inside the sand grain can enter into the oil-well pump along with crude oil together, when the sand grain enters into the oil-well pump inside, the sand grain can be attached to on the inner wall of oil-well pump, does not clear up easily at the surface scale deposit of oil-well pump for a long time, and then can influence the normal motion of plunger, damages the oil-well pump easily for the life of oil-well pump is shorter.
The double-acting oil well pump is composed of an upper pump, a lower pump and a middle sealing pair, wherein the upper pump is composed of an upper pump cylinder and an upper plunger, the upper plunger is provided with a traveling valve, the lower pump is composed of a lower pump cylinder and a lower plunger, a fixed valve is arranged at the bottom of the lower pump cylinder, the upper pump cylinder is connected with the lower pump cylinder through a middle sealing pair outer cylinder, the upper plunger is sequentially connected with the traveling valve, the sealing pair plunger and the lower plunger, all the valves in the oil well pump adopt mature and reliable oil well pump standard parts, the reliability of the valves is improved, the flow channel is large, the flow resistance is small, the pump efficiency is high, but the oil well pump cannot filter sand particles in crude oil, the sand particles can enter the oil well pump along with the crude oil, the damage of the oil well pump is easily caused, and the service life of the oil well pump is influenced.
Disclosure of Invention
The invention aims to solve the technical problems that the double-acting oil well pump in the prior art is complex in structure and arrangement, cannot effectively filter sand grains in crude oil and is short in service life, and provides the oil-sand separation type oil well pump which is simple in structure and arrangement, can effectively filter the sand grains in the crude oil and is long in service life.
In order to solve the technical problems, the invention adopts the technical scheme that: an oil-sand separation type oil well pump comprises a shell with an opening at the top and an oil inlet which is arranged at the bottom of the shell and used for crude oil to enter; the oil-sand separation device comprises a shell, a pump body, a sealing circulating piece and an oil-sand separation structure, wherein the pump body is arranged in the shell and can move up and down; the pump body, the sealed circulating piece and the oil-sand separation structure are sequentially connected and communicated from top to bottom; the top of the pump body is provided with a discharge port, and the bottom of the pump body is provided with a discharge valve used for controlling the communication between the pump body and the sealed circulation piece; the oil-sand separation structure is connected with a suction valve for opening and closing the oil inlet.
When the oil-sand separation device disclosed by the invention is in an upstroke, the pump body moves upwards, the sealing circulating piece and the oil-sand separation structure move upwards together with the pump body, meanwhile, the oil-sand separation structure moves upwards to drive the suction valve to be away from the oil inlet, so that the oil inlet is opened, crude oil enters the shell from the oil inlet, the oil-sand separation structure separates oil sand in the crude oil, and the separated oil enters the sealing circulating piece. During the down stroke, the pump body moves downwards, the discharge valve is opened, the pump body is communicated with the sealed circulating piece at the moment, and oil in the sealed circulating piece enters the pump body and is finally discharged through the discharge port. The oil-sand separation structure can effectively remove sand and stone in crude oil through the arrangement of the oil-sand separation structure, reduces sand blocking and sanding phenomena, prolongs the service life of an oil well pump, and is simple and reasonable in overall structure arrangement, simple and convenient to construct, low in manufacturing cost and convenient to popularize and apply in a large range.
Preferably, the oil-sand separation structure comprises a separation cylinder and a plurality of oil-sand separation holes uniformly distributed on the side wall of the separation cylinder; the top of the separation cylinder is communicated with the sealed circulating piece; the suction valve is connected to the bottom of the separation cylinder.
Preferably, the shell comprises an upper shell part, a connecting shell part and a sand settling shell part which are sequentially communicated; the pump body can move up and down in the upper shell part; the separation cylinder can move up and down in the sand sediment shell part.
Preferably, the cross-sectional area of the connecting shell portion is smaller than the cross-sectional area of the upper shell portion and the cross-sectional area of the sand sediment shell portion; the cross-sectional area of the sealing flow-through is smaller than the cross-sectional area of the pump body and the cross-sectional area of the separation cylinder.
Preferably, a through hole is formed in the side wall of one end, connected with the pump body, of the sealed circulating piece.
Preferably, the suction valve is connected with the oil-sand separation structure through a telescopic rod.
Preferably, a multi-stage filtering structure for filtering sand grains in the oil liquid is arranged in the pump body.
Preferably, the multi-stage filtering structure comprises a plurality of filter screens which can perform stepped multi-stage filtering on the oil; the filter screens are sequentially arranged in the pump body from top to bottom.
Preferably, the multistage filtering structure comprises a first filtering net and a second filtering net which are sequentially arranged in the pump body from top to bottom; the aperture of the filter hole of the first filter screen is smaller than that of the filter hole of the second filter screen.
Preferably, a buffer pad with a buffering function is arranged at the oil inlet on the shell.
Compared with the prior art, the invention has the beneficial effects that:
1) the oil-sand separation structure and the multistage filtering structure can effectively remove sand and stone in crude oil, reduce sand blocking and sanding phenomena, prolong the service life of an oil well pump, and have the advantages of simple and reasonable overall structure arrangement, large flow passage, small flow resistance, simple and convenient construction, low manufacturing cost and convenience for large-scale popularization and application;
2) according to the invention, the arrangement of the through hole on the sealing circulating piece can enable part of crude oil to enter the space between the pump body and the shell, so that lubricating media can be filled among the pump body, the sealing circulating piece and the shell, the mutual friction among the pump body, the sealing circulating piece and the shell is lubricated, the abrasion among oil well pump structures can be effectively reduced, the eccentric wear prevention effect is achieved, and the service life of an oil well pump is prolonged;
3) the suction valve is connected with the bottom of the separating cylinder through the telescopic rod, and the telescopic rod drives the suction valve to open or close the oil inlet, so that the pump body drives the telescopic rod and the suction valve to forcibly open and close the oil inlet no matter in an up stroke or a down stroke, and the phenomenon of 'air lock' of a suction valve ball of a common tubular pump can be effectively avoided.
Drawings
FIG. 1 is a schematic view of the internal structure of the oil-sand separating pump of the present invention;
FIG. 2 is an enlarged view at A in FIG. 1;
FIG. 3 is a schematic diagram of a portion of the oil-sand separating pump of the present invention;
FIG. 4 is a schematic view of the structure of the outer case of the present invention;
FIG. 5 is a schematic diagram of the oil-sand separating pump of the present invention before the start of the upstroke;
FIG. 6 is a schematic view of the oil-sand separating pump of the present invention during upstroke;
FIG. 7 is a schematic structural diagram of the oil-sand separating pump of the present invention before the start of the down stroke;
fig. 8 is a schematic structural diagram of the oil-sand separation type oil well pump during the downstroke.
In the drawings: 1-a housing; 11-an upper housing portion; 12-a connecting shell portion; 13-a sand sediment shell; 14-a first variable diameter portion; 15-a second variable diameter portion; 2-a pump body; 21-a discharge port; 22-a discharge valve; 3-sealing the flow-through piece; 31-a through hole; 32-a third diameter-changing part; 33-a fourth diameter-changing portion; 4-oil sand separation structure; 41-a separation cylinder; 42-oil sand separation holes; 5-a suction valve; 6, a telescopic rod; 7-a multi-stage filtration structure; 71-a filter screen; 711-a first filter screen; 712-a second filter; 8-an upper chamber; 9-a lower chamber; 10-an oil inlet; 101-cushion pad.
Detailed Description
The drawings are for illustrative purposes only and are not to be construed as limiting the patent; for the purpose of better illustrating the embodiments, certain features of the drawings may be omitted, enlarged or reduced, and do not represent the size of an actual product; it will be understood by those skilled in the art that certain well-known structures in the drawings and descriptions thereof may be omitted. The positional relationships depicted in the drawings are for illustrative purposes only and should not be construed as limiting the present patent.
The same or similar reference numerals in the drawings of the embodiments of the present invention correspond to the same or similar components; in the description of the present invention, it should be understood that if there are terms such as "upper", "lower", "left", "right", "long", "short", etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the drawings, it is only for convenience of description and simplicity of description, but does not indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and therefore, the terms describing the positional relationships in the drawings are only used for illustrative purposes and are not to be construed as limitations of the present patent, and specific meanings of the terms may be understood by those skilled in the art according to specific situations.
The technical scheme of the invention is further described in detail by the following specific embodiments in combination with the attached drawings:
example 1
Fig. 1-4 show an embodiment 1 of an oil-sand separation type oil well pump, which includes a housing 1, a pump body 2, a sealed circulation member 3, an oil-sand separation structure 4, a suction valve 5, and a multi-stage filtering structure 7, wherein the top of the housing 1 is an open structure, the bottom of the housing 1 is provided with an oil inlet 10, and when the oil well pump is in operation, crude oil can enter the housing 1 from the oil inlet 10.
Specifically, the housing 1 includes an upper housing portion 11, a connecting housing portion 12 and a sand sediment housing portion 13, the upper housing portion 11, the connecting housing portion 12 and the sand sediment housing portion 13 are sequentially connected, and the upper housing portion 11, the connecting housing portion 12 and the sand sediment housing portion 13 are integrally formed, wherein the cross-sectional area of the connecting housing portion 12 is smaller than that of the upper housing portion 11 and that of the sand sediment housing portion 13, in this embodiment, the housing 1 is cylindrical, that is, the inner diameter of the connecting housing portion 12 is smaller than that of the upper housing portion 11 and that of the sand sediment housing portion 13.
Wherein the upper shell portion 11 is connected with the connecting shell portion 12 through a first variable diameter portion 14, the cross-sectional area of the first variable diameter portion 14 is gradually reduced from the upper shell portion 11 to the connecting shell portion 12, wherein the desilting shell portion 13 is connected with the connecting shell portion 12 through a second variable diameter portion 15, and the cross-sectional area of the second variable diameter portion 15 is gradually reduced from the desilting shell portion 13 to the connecting shell portion 12.
The pump body 2 is a cylindrical member, the pump body 2 is movably sleeved in the upper shell portion 11, the pump body 2 can move up and down in the upper shell portion 11, the movement of the pump body 2 is realized by an external driving device, such as an oil pumping unit, and the driving device is not shown in the attached drawings.
Wherein sealed circulation piece 3 is for being hollow drum, wherein sealed circulation piece 3 movable sleeve is located in connecting shell portion 12, and can reciprocate in connecting shell portion 12, the axial length of sealed circulation piece 2 is greater than the axial length of connecting shell portion 12, fixed cover is equipped with the sealing ring on the sealed circulation piece 3, do not draw the sealing ring in the drawing, the sealing ring adopts the rubber material, the inseparable butt of sealing ring is between sealed circulation piece 3 and connecting shell portion 12, sealed circulation piece 3 follows the in-process that pump body 2 reciprocated, corresponding change can take place for the pressure of shell 1 below the sealing ring, the setting of sealing ring can strictly guarantee the sealing pressure in the shell 1 below the sealing ring, and then can guarantee the effective suction to crude oil.
The top end of the sealed circulation piece 3 is communicated with the bottom end of the pump body 2, the cross-sectional area of the sealed circulation piece 3 is smaller than that of the pump body 2, the sealed circulation piece 3 is communicated with the pump body 2 through the third diameter-changing part 32, and the cross-sectional area of the third diameter-changing part 32 is gradually reduced from the pump body 2 to the sealed circulation piece 3.
Wherein the top of the pump body 2 is provided with a discharge port 21, the oil liquid after sand removal treatment is discharged through the discharge port 21, the bottom of the pump body 2 is provided with a discharge valve 22, in this embodiment, the discharge valve 22 is a traveling valve, the discharge valve 22 is arranged at the position of the third diameter-changing portion 32, the discharge valve 22 is used for controlling the communication between the pump body 2 and the sealed circulating member 3, when the discharge valve 22 is opened, the crude oil in the sealed circulating member 3 can flow into the pump body 2, and when the discharge valve 22 is closed, the crude oil in the sealed circulating member 3 cannot enter the pump body 2.
Wherein the partial lateral wall of sealed circulation piece 3, form cavity 8 between third variable diameter portion 32 and the upper shell 11, the lateral wall of the one end that sealed circulation piece 3 and pump body 2 are connected is equipped with through-hole 31, fluid accessible through-hole 31 in the sealed circulation piece 3 gets into in the cavity 8, the setting of through-hole 31 can make partial fluid get into in the cavity 8, and then can make the pump body 2, be full of the lubricant between sealed circulation piece 3 and the shell 1, to pump body 2, the mutual friction of sealed circulation piece 3 and shell 1 plays the lubrication action, can effectually alleviate wearing and tearing between the oil-well pump structure, play the effect of anti-eccentric wear, the life of extension oil-well pump.
Wherein oil sand separation structure 4 is used for intercepting the large granule grit in the filtration crude oil, oil sand separation structure 4 sets up in heavy husky shell portion 13, and can reciprocate in heavy husky shell portion 13, specifically, oil sand separation structure 4 includes cylinder 41 and a plurality of oil sand separation hole 42, wherein cylinder 41 is the drum shape, the top of cylinder 41 is open structure, and the cross-sectional area of sealed circulation piece 3 is less than the cross-sectional area of cylinder 41, the internal diameter of sealed circulation piece 3 is less than the internal diameter of cylinder 41 promptly, the top of cylinder 41 is linked together through fourth variable diameter portion 33 and the bottom of sealed circulation piece 3, the cross-sectional area of fourth variable diameter portion 33 reduces from cylinder 41 to the direction of sealed circulation piece 3 gradually.
A plurality of oil sand separation holes 42 are uniformly distributed on the side wall of the separation cylinder 41, a lower cavity 9 is formed between the separation cylinder 41 and the sand settling shell part 13, crude oil can enter the lower cavity 9 from an oil inlet 10 at the bottom of the shell 1, liquid and small-particle sand grains in the crude oil can pass through the oil sand separation holes 42 to enter the separation cylinder 41, large-particle sand grains are intercepted outside the separation cylinder 41, and the large-particle sand grains intercepted and filtered are settled in the lower cavity 9 under the action of gravity.
The suction valve 5 is connected to the bottom of the separation cylinder 41, the suction valve 5 is located right above the oil inlet 10, the suction valve 5 is arranged to open and close the oil inlet 10, specifically, the separation cylinder 41 can drive the suction valve 5 to move to the oil inlet 10 in the downward movement process, the oil inlet 10 is sealed and closed at the time, the separation cylinder 41 can drive the suction valve 5 to be far away from the oil inlet 10 in the upward movement process, the oil inlet 10 is opened at the time, crude oil can enter the lower cavity 9 through the oil inlet 10, and in this embodiment, the suction valve 5 seals the oil inlet 10 by moving to the oil inlet 10 or far away from the oil inlet 10. As another implementation manner, the suction valve 5 may also be a common control valve, and the opening and closing of the oil inlet 10 is controlled by controlling the opening and closing of the suction valve 5, which is not described herein again.
Preferably, the suction valve 5 is connected with the bottom of the separation cylinder 41 through the telescopic rod 6, the telescopic rod 6 can do telescopic motion, one end of the telescopic rod 6 is connected with the suction valve 5, the other end of the telescopic rod is connected with the bottom of the separation cylinder 41, in this embodiment, the telescopic rod 6 selects the electric push rod, the suction valve 5 can be driven by the telescopic rod 6 to open or close the oil inlet 10, so that the up stroke or the down stroke is set, the pump body 2 or the telescopic rod 6 drives the suction valve 5 to move to the oil inlet 10 or keep away from the oil inlet 10, blocking of the oil inlet 10 is realized, and the air locking phenomenon of the suction valve ball of the common tubular pump can be effectively avoided.
Wherein multi-stage filtration structure 7 sets up in the pump body 2, multi-stage filtration structure 7 is arranged in carrying out filtration treatment to the sand grain of tiny granule in the fluid that gets into in the pump body 2, it is concrete, multi-stage filtration structure 7 includes a plurality of filter screen 71, a plurality of filter screen 71 sets gradually in the pump body 2 from last to down, as preferred, filter screen 71 detachable sets up in the pump body 2, multi-stage filtration structure 7 can form cascaded multi-stage filtration to fluid, a plurality of filter screen 71 sets up at least two, the spaced setting is in the pump body 2, the filtration pore diameter on the filter screen 71 that is close to discharge port 21 more is less, in order to realize filtering crude oil step by step. As another implementation manner, a multi-stage filter hole is formed in the same filter screen 71, and the multi-stage filter hole is gradually reduced from bottom to top, so that multi-stage filtration of oil in the pump body 2 can also be achieved. The multistage filtering structure 7 can carry out multistage filtration to the fluid that gets into in the pump body 2, can play good sand prevention and prevent stifled effect.
The specific working principle of the invention is as follows:
before the start of the upstroke, as shown in fig. 5, the pump body 2, the sealed circulation member 3 and the oil-sand separating structure 4 are located at the lower portion of the casing 1 as a whole, that is, the third diameter-changing portion 32 abuts against the first diameter-changing portion 14, and the suction valve 5 is located at the oil inlet 10 to close the oil inlet 10.
As shown in fig. 6, during the upward stroke, the pump body 2 moves upward, the sealed circulation piece 3 and the separation cylinder 41 move upward together with the pump body 2, the third diameter-changing portion 32 is far away from the first diameter-changing portion 14, the fourth diameter-changing portion 33 abuts against the second diameter-changing portion 15, and meanwhile, the separation cylinder 41 moves upward to drive the suction valve 5 to be far away from the oil inlet 10, so that the oil inlet 10 is opened, crude oil enters the lower chamber 9 from the oil inlet 10, oil and small-particle sand in the crude oil enter the separation cylinder 41 through the oil-sand separation hole 42, large-particle sand is trapped in the lower chamber 9, the separated oil enters the sealed circulation piece 3, and a part of the oil enters the upper chamber 8 through the through hole 31 in the side wall of the sealed circulation piece 3.
Before the down stroke begins, as shown in fig. 7, the suction valve 5 is moved to the oil inlet 10 by the telescopic rod 6, and the oil inlet 10 is closed to prevent oil spilling.
As shown in fig. 8, in the down stroke, the pump body 2 moves downward, the discharge valve 22 is opened, the pump body 2 and the sealed fluid-operated element 3 are communicated with each other, and the oil stored in the upper chamber 8 and the sealed fluid-operated element 3 enters the pump body 2, passes through the multi-stage filter structure 7, and is discharged through the discharge port 21.
The oil-sand separation structure 4 and the multistage filtering structure 7 can effectively remove sand and stone in crude oil, reduce sand blocking and sanding, prolong the service life of the oil well pump, and have the advantages of simple and reasonable overall structure, large flow passage, small flow resistance, simple and convenient construction, low cost and convenience for large-scale popularization and application.
Example 2
The present embodiment is different from embodiment 1 in that: in this embodiment, as shown in fig. 1, an oil inlet 10 at the bottom of the housing 1 is provided with a cushion pad 101, the cushion pad 101 has a buffering function, the cushion pad 101 is made of rubber, the oil-well pump is in operation, the suction valve 5 needs to be repeatedly moved to the oil inlet 10 and away from the oil inlet 10, wear of positions around the suction valve 5 and the oil inlet 10 is easily caused for a long time, the setting of the cushion pad 101 can effectively reduce the wear of the positions around the suction valve 5 and the oil inlet 10, and the service life of the oil-well pump is further prolonged.
Example 3
The present embodiment is different from embodiment 1 in that: in this embodiment, two filter screens 71 are provided, which are a first filter screen 711 and a second filter screen 712, respectively, wherein the first filter screen 711 is disposed above the second filter screen 712, and the aperture of the filter holes on the first filter screen 711 is smaller than the aperture of the filter holes on the second filter screen 712. Preferably, filter screen 71 chooses for use the stiff mesh in this embodiment, and is umbrella structure or the top is the taper type structure of fillet, and is concrete, as shown in fig. 5 first filter screen 711 sets up to umbrella structure, and the net of first filter screen 711 is protruding to one side at discharge port 21 place, and second filter screen 712 sets up to the taper type structure that the top is the fillet, and the shape setting of first filter screen 711 and second filter screen 712 can increase the area of contact with fluid, improves the filtration efficiency of first filter screen 711 and second filter screen 712.
It should be understood that the above-described embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.
Claims (10)
1. An oil-sand separation type oil well pump comprises a shell (1) with an opening at the top and an oil inlet (10) arranged at the bottom of the shell (1) and used for crude oil to enter; the method is characterized in that: the oil-sand separation device is characterized by also comprising a pump body (2) which is arranged in the shell (1) and can move up and down, a sealed circulating piece (3) and an oil-sand separation structure (4) for intercepting and filtering large-particle sand in crude oil; the pump body (2), the sealing circulating piece (3) and the oil-sand separating structure (4) are sequentially connected and communicated from top to bottom; the top of the pump body (2) is provided with a discharge port (21), and the bottom of the pump body (2) is provided with a discharge valve (22) for controlling whether the pump body (2) is communicated with the sealed circulating piece (3) or not; the oil-sand separation structure (4) is connected with a suction valve (5) for opening and closing the oil inlet (10).
2. The oil-sand separating oil well pump according to claim 1, characterized in that: the oil sand separation structure (4) comprises a separation cylinder (41) and a plurality of oil sand separation holes (42) uniformly distributed on the side wall of the separation cylinder (41); the top of the separation cylinder (41) is communicated with the sealed circulating piece (3); the suction valve (5) is connected to the bottom of the separation cylinder (41).
3. The oil-sand separating oil well pump according to claim 2, characterized in that: the shell (1) comprises an upper shell part (11), a connecting shell part (12) and a sand settling shell part (13) which are sequentially communicated from top to bottom; the pump body (2) can move up and down in the upper shell part (11); the separation cylinder (41) can move up and down in the sand sediment shell part (13).
4. The oil-sand separating oil well pump according to claim 3, characterized in that: the cross-sectional area of the connecting shell part (12) is smaller than the cross-sectional area of the upper shell part (11) and the cross-sectional area of the sand sediment shell part (13); the cross-sectional area of the sealing flow-through (3) is smaller than the cross-sectional area of the pump body (2) and the cross-sectional area of the separating cylinder (41).
5. The oil-sand separating oil well pump according to claim 1, characterized in that: the side wall of one end of the sealed circulating piece (3) connected with the pump body (2) is provided with a through hole (31).
6. The oil-sand separating oil well pump according to claim 1, characterized in that: the suction valve (5) is connected with the oil-sand separation structure (4) through a telescopic rod (6).
7. The oil-sand separating oil well pump according to claim 1, characterized in that: and a multi-stage filtering structure (7) for filtering sand grains in the oil is arranged in the pump body (2).
8. The oil-sand separating oil well pump according to claim 7, characterized in that: the multi-stage filtering structure (7) comprises a plurality of filter screens (71) which can perform stepped multi-stage filtering on oil; the filter screens (71) are sequentially arranged in the pump body (2) from top to bottom.
9. The oil-sand separating oil well pump according to claim 8, characterized in that: the multistage filtering structure (71) comprises a first filtering net (711) and a second filtering net (712) which are sequentially arranged in the pump body (2) from top to bottom; the aperture of the filter holes of the first filter screen (711) is smaller than that of the filter holes of the second filter screen (712).
10. The oil-sand separating oil well pump according to any one of claims 1 to 9, characterized in that: a buffer pad (101) with a buffering function is arranged at the oil inlet (10) on the shell (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210111185.8A CN114458592B (en) | 2022-01-27 | 2022-01-27 | Oil-sand separation type oil pump |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210111185.8A CN114458592B (en) | 2022-01-27 | 2022-01-27 | Oil-sand separation type oil pump |
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| Publication Number | Publication Date |
|---|---|
| CN114458592A true CN114458592A (en) | 2022-05-10 |
| CN114458592B CN114458592B (en) | 2024-01-30 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210111185.8A Active CN114458592B (en) | 2022-01-27 | 2022-01-27 | Oil-sand separation type oil pump |
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AU1727792A (en) * | 1991-05-29 | 1992-12-03 | St Clair Cunningham Christie | A diaphragm type pumping device |
| US6126724A (en) * | 1999-02-19 | 2000-10-03 | Hansen Inc. | Locomotive air processing apparatus |
| KR20030022227A (en) * | 2003-02-14 | 2003-03-15 | (주)케이.티.이 | Edible oil refine filter pump structure |
| US20040062665A1 (en) * | 2002-09-27 | 2004-04-01 | Spx Corporation | Pump vibration reduction system |
| CN204805078U (en) * | 2015-06-23 | 2015-11-25 | 盐城鑫益特种抽油泵制造有限公司 | Long column stopper sand control card oil -well pump |
| CN208793212U (en) * | 2018-09-11 | 2019-04-26 | 万韦尔石油装备(天津)有限公司 | A kind of oil pump sleeve filter device |
| CN214741980U (en) * | 2020-12-31 | 2021-11-16 | 中船重工中南装备有限责任公司 | Oil pump for petroleum exploitation |
-
2022
- 2022-01-27 CN CN202210111185.8A patent/CN114458592B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AU1727792A (en) * | 1991-05-29 | 1992-12-03 | St Clair Cunningham Christie | A diaphragm type pumping device |
| US6126724A (en) * | 1999-02-19 | 2000-10-03 | Hansen Inc. | Locomotive air processing apparatus |
| US20040062665A1 (en) * | 2002-09-27 | 2004-04-01 | Spx Corporation | Pump vibration reduction system |
| KR20030022227A (en) * | 2003-02-14 | 2003-03-15 | (주)케이.티.이 | Edible oil refine filter pump structure |
| CN204805078U (en) * | 2015-06-23 | 2015-11-25 | 盐城鑫益特种抽油泵制造有限公司 | Long column stopper sand control card oil -well pump |
| CN208793212U (en) * | 2018-09-11 | 2019-04-26 | 万韦尔石油装备(天津)有限公司 | A kind of oil pump sleeve filter device |
| CN214741980U (en) * | 2020-12-31 | 2021-11-16 | 中船重工中南装备有限责任公司 | Oil pump for petroleum exploitation |
Also Published As
| Publication number | Publication date |
|---|---|
| CN114458592B (en) | 2024-01-30 |
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