CN114458592B - Oil-sand separation type oil pump - Google Patents
Oil-sand separation type oil pump Download PDFInfo
- Publication number
- CN114458592B CN114458592B CN202210111185.8A CN202210111185A CN114458592B CN 114458592 B CN114458592 B CN 114458592B CN 202210111185 A CN202210111185 A CN 202210111185A CN 114458592 B CN114458592 B CN 114458592B
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- oil
- sand
- pump body
- pump
- shell
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- 239000003027 oil sand Substances 0.000 title claims abstract description 59
- 238000000926 separation method Methods 0.000 title claims abstract description 40
- 239000003921 oil Substances 0.000 claims abstract description 87
- 238000007789 sealing Methods 0.000 claims abstract description 58
- 239000004576 sand Substances 0.000 claims abstract description 44
- 239000010779 crude oil Substances 0.000 claims abstract description 31
- 238000001914 filtration Methods 0.000 claims abstract description 31
- 239000002245 particle Substances 0.000 claims abstract description 12
- 239000003129 oil well Substances 0.000 claims description 25
- 239000007788 liquid Substances 0.000 claims description 14
- 239000011148 porous material Substances 0.000 claims description 6
- 238000000034 method Methods 0.000 claims description 4
- 230000000694 effects Effects 0.000 claims description 3
- 238000004062 sedimentation Methods 0.000 claims 2
- 230000000903 blocking effect Effects 0.000 abstract description 4
- 230000002035 prolonged effect Effects 0.000 abstract description 4
- 238000004519 manufacturing process Methods 0.000 abstract description 3
- 238000000151 deposition Methods 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 238000005299 abrasion Methods 0.000 description 3
- 238000010276 construction Methods 0.000 description 3
- 230000007423 decrease Effects 0.000 description 3
- 239000012530 fluid Substances 0.000 description 3
- 238000005086 pumping Methods 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 230000001050 lubricating effect Effects 0.000 description 2
- 238000005461 lubrication Methods 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
- 230000004323 axial length Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000003305 oil spill Substances 0.000 description 1
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 DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP 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
-
- 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
-
- 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
Abstract
The invention relates to the technical field of oil pumps, in particular to an oil-sand separation type oil 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 allowing crude oil to enter; the oil sand separating structure is used for intercepting and filtering large-particle sand in crude oil; the pump body, the sealing circulation piece and the oil sand separation structure are sequentially connected from top to bottom and communicated; 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 for controlling whether the pump body is communicated with the sealing circulation piece or not; the oil-sand separation structure is connected with a suction valve for opening and closing the oil inlet. The oil-sand separating structure is simple and reasonable in overall structure arrangement, simple and convenient to construct and low in manufacturing cost, sand and stones in crude oil can be effectively removed through the arrangement of the oil-sand separating structure, sand blocking and sanding phenomena are reduced, and the service life of the oil pump is prolonged.
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 pump is a reciprocating pump, and specifically, power is transmitted from the ground to the underground through the sucker rod, so that a plunger of the sucker pump reciprocates up and down, and crude oil in an oil well is lifted to the ground along an oil pipe. The oil-sucking and oil-discharging of the double-acting oil pump can be completed by one reciprocating stroke, and compared with the conventional oil pump with the same pump diameter and working parameters, the liquid yield is greatly improved, but the existing double-acting oil pump has the problems of complex structure, difficult processing, short service life and the like, so that the double-acting oil pump cannot be widely applied.
In addition, the sand-out condition of the oil layer of many oil fields in China is more and more serious, the sand content in crude oil is more and more, sand blocking sand grinding phenomenon is easy to occur, and the operation of the oil well is influenced. And current double-acting oil-well pump is at the in-process of oil pumping, and the sand grain can enter into the oil-well pump inside along with the crude oil, and when the sand grain enters into the oil-well pump inside, the sand grain can be attached to the inner wall of oil-well pump, and long-time difficult clearance is easy at the surface scale deposit of oil-well pump, 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 utility model discloses a double-acting oil-well pump, this oil-well pump comprises last pump, lower pump and middle seal pair, go up the pump and have last pump barrel and go up the plunger and constitute, go up the plunger and have the traveling valve, the lower pump comprises lower pump barrel and lower plunger, there is the fixed valve lower pump barrel bottom, go up the pump barrel and link to each other with lower pump barrel through middle seal pair urceolus, go up plunger and traveling valve, seal pair plunger, lower plunger link to each other in proper order, all valve members all adopt ripe reliable oil-well pump standard components in this oil-well pump, the reliability of valve members has been improved, and the big liquid flow resistance of runner is little, the pump efficiency is high, but this oil-well pump can't filter the sand grain in the crude oil, the sand grain can enter into the oil-well pump inside along with the crude oil, very easily cause the damage of oil-well pump, influence the life of oil-well pump.
Disclosure of Invention
The invention provides the oil-sand separation type oil pump which is simple in structure and arrangement, can effectively filter sand grains in crude oil and has long service life, and aims to solve the technical problems that the structure of the double-acting oil pump in the prior art is complex, sand grains in crude oil cannot be effectively filtered and the service life is short.
In order to solve the technical problems, the invention adopts the following technical scheme: an oil-sand separation type oil pump comprises a shell with an opening at the top and an oil inlet arranged at the bottom of the shell and used for allowing crude oil to enter; the oil sand separating device also comprises a pump body, a sealing circulation piece and an oil sand separating structure, wherein the pump body, the sealing circulation piece and the oil sand separating structure are both arranged in the shell and can move up and down, and the oil sand separating structure is used for intercepting and filtering large-particle sand in crude oil; the pump body, the sealing circulation piece and the oil sand separation structure are sequentially connected from top to bottom and are communicated; 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 for controlling whether the pump body is communicated with the sealing circulation piece or not; the oil-sand separation structure is connected with a suction valve for opening and closing the oil inlet.
In the invention, the pump body moves upwards during the upward stroke, the sealing circulation piece and the oil sand separating structure move upwards along with the pump body, and meanwhile, the oil sand separating structure moves upwards to drive the suction valve to be far away from the oil inlet, so that the oil inlet is opened, crude oil liquid enters the shell from the oil inlet, the oil sand separating structure separates oil sand in the crude oil liquid, and oil liquid after separation enters the sealing circulation piece. During the downstroke, the pump body moves downwards, and the discharge valve opens, and the pump body is linked together with the sealed circulation piece this moment, and the fluid in the sealed circulation piece gets into the pump body in the last discharge through the discharge port. According to the oil-sand separating structure, sand stones and sand grains in crude oil can be effectively removed, sand blocking and sanding phenomena are reduced, the service life of the oil pump is prolonged, the whole structure is simple and reasonable, construction is simple and convenient, manufacturing cost is low, and the oil-sand separating structure is convenient to popularize and apply in a large range.
Preferably, the oil sand separating structure comprises a separating cylinder and a plurality of oil sand separating holes uniformly distributed on the side wall of the separating cylinder; the top of the separating cylinder is communicated with the sealing circulation 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 separating cylinder can move up and down in the sand settling shell.
Preferably, the cross-sectional area of the connection housing portion is smaller than the cross-sectional area of the upper housing portion and the cross-sectional area of the sand-settling housing portion; the cross-sectional area of the sealing flow is smaller than the cross-sectional area of the pump body and the cross-sectional area of the separator cartridge.
Preferably, a through hole is formed in the side wall of one end, connected with the pump body, of the sealing circulation piece.
Preferably, the suction valve is connected with the oil-sand separation structure through a telescopic rod.
Preferably, a multistage filtering structure for filtering sand grains in the oil liquid is arranged in the pump body.
Preferably, the multistage filtering structure comprises a plurality of filter screens capable of forming stepped multistage filtering for oil; the filter screens are sequentially arranged in the pump body from top to bottom.
Preferably, the multistage filtering structure comprises a first filter screen and a second filter screen 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 cushion with a buffer function is arranged at the oil inlet of 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 stones and sand grains in crude oil, reduce sand clamping sand grinding phenomenon, improve the service life of the oil pump, and have the advantages of simple and reasonable whole structure, large flow passage, small liquid flow resistance, simple and convenient construction, low manufacturing cost and convenient popularization and application in a large range;
2) The through holes on the sealing circulation piece can enable part of crude oil liquid to enter the space between the pump body, the sealing circulation piece and the shell, so that lubricating medium is filled among the pump body, the sealing circulation piece and the shell, the lubricating effect is achieved on the mutual friction of the pump body, the sealing circulation piece and the shell, abrasion among oil-well pump structures can be effectively reduced, the eccentric wear prevention effect is achieved, and the service life of the 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 forcedly open and close the oil inlet no matter in an up stroke or a down stroke, and the phenomenon of 'airlock' of a common pipe pump suction valve ball can be effectively avoided.
Drawings
FIG. 1 is a schematic view of the internal structure of an oil-sand separation type oil pump of the present invention;
FIG. 2 is an enlarged view at A in FIG. 1;
FIG. 3 is a schematic view of a part of the structure of the oil-sand separation type oil pump of the present invention;
FIG. 4 is a schematic view of the structure of the housing of the present invention;
FIG. 5 is a schematic diagram of the structure of the oil-sand separation pump before the start of the upstroke;
FIG. 6 is a schematic diagram of the oil-sand separation pump of the present invention in the up-stroke configuration;
FIG. 7 is a schematic diagram of the structure of the oil-sand separation type oil pump before the downstroke of the oil-sand separation type oil pump starts;
fig. 8 is a schematic diagram of the oil-sand separation type oil pump of the present invention in the down stroke.
In the accompanying drawings: 1-a housing; 11-an upper shell portion; 12-a connecting shell portion; 13-sand-settling shell part; 14-a first diameter-changing portion; 15-a second variable diameter portion; 2-a pump body; 21-an outlet; 22-a discharge valve; 3-sealing the flow-through; 31-through holes; 32-a third diameter-changing portion; 33-fourth diameter-changing portion; 4-oil sand separation structure; 41-a separation cylinder; 42-oil sand separation holes; 5-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 screen; 8-an upper chamber; 9-a lower chamber; 10-oil inlets; 101-cushion pad.
Detailed Description
The drawings are for illustrative purposes only and are not to be construed as limiting the present patent; for the purpose of better illustrating the embodiments, certain elements of the drawings may be omitted, enlarged or reduced and do not represent the actual product dimensions; it will be appreciated by those skilled in the art that certain well-known structures in the drawings and descriptions thereof may be omitted. The positional relationship depicted in the drawings is for illustrative purposes only and is not to be construed as limiting the present patent.
The same or similar reference numbers in the drawings of embodiments of the invention correspond to the same or similar components; in the description of the present invention, it should be understood that, if there are orientations or positional relationships indicated by terms "upper", "lower", "left", "right", "long", "short", etc., based on the orientations or positional relationships shown in the drawings, this is merely for convenience in describing the present invention and simplifying the description, and is not an indication or suggestion that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, so that the terms describing the positional relationships in the drawings are merely for exemplary illustration and are not to be construed as limitations of the present patent, and that it is possible for those of ordinary skill in the art to understand the specific meaning of the terms described above according to specific circumstances.
The technical scheme of the invention is further specifically described by the following specific embodiments with reference to the accompanying drawings:
example 1
Fig. 1-4 show an embodiment 1 of an oil-sand separation type oil pump, which comprises a shell 1, a pump body 2, a sealing circulation piece 3, an oil-sand separation structure 4, a suction valve 5 and a multi-stage filtering structure 7, wherein the top of the shell 1 is of an opening structure, an oil inlet 10 is arranged at the bottom of the shell 1, and crude oil can enter the shell 1 from the oil inlet 10 when the oil pump works.
Specifically, the housing 1 includes an upper housing portion 11, a connection housing portion 12 and a sand-depositing housing portion 13, the upper housing portion 11, the connection housing portion 12 and the sand-depositing housing portion 13 are sequentially communicated, and the upper housing portion 11, the connection housing portion 12 and the sand-depositing housing portion 13 are in an integrally formed structure, wherein a cross-sectional area of the connection housing portion 12 is smaller than that of the upper housing portion 11 and the sand-depositing housing portion 13, and in this embodiment, the housing 1 is cylindrical, i.e. an inner diameter of the connection housing portion 12 is smaller than that of the upper housing portion 11 and the sand-depositing housing portion 13.
Wherein the upper shell portion 11 is connected to the connection shell portion 12 through a first reducing portion 14, the cross-sectional area of the first reducing portion 14 gradually decreases from the upper shell portion 11 toward the connection shell portion 12, wherein the sand-settling shell portion 13 is connected to the connection shell portion 12 through a second reducing portion 15, and the cross-sectional area of the second reducing portion 15 gradually decreases from the sand-settling shell portion 13 toward the connection shell portion 12.
The pump body 2 is a cylindrical member, the pump body 2 is movably sleeved in the upper shell 11, the pump body 2 can move up and down in the upper shell 11, the movement of the pump body 2 is realized through an external driving device, such as a pumping unit, and the driving device is not shown in the drawing.
The sealing circulation piece 3 is a hollow cylinder, the sealing circulation piece 3 is movably sleeved in the connecting shell part 12 and can move up and down in the connecting shell part 12, the axial length of the sealing circulation piece 2 is greater than that of the connecting shell part 12, the sealing circulation piece 3 is fixedly sleeved with a sealing ring, the sealing ring is not drawn in the drawing, the sealing ring is made of rubber, the sealing ring is tightly abutted between the sealing circulation piece 3 and the connecting shell part 12, the sealing circulation piece 3 can correspondingly change the pressure of the shell 1 below the sealing ring along with the up and down movement of the pump body 2, namely, the arrangement of the sealing ring can strictly ensure the sealing pressure in the shell 1 below the sealing ring, and further can ensure the effective pumping of crude oil.
Wherein the top of sealing circulation piece 3 is linked together with the bottom of pump body 2, and the cross-sectional area of sealing circulation piece 3 is less than the cross-sectional area of pump body 2, and sealing circulation piece 3 is linked together with pump body 2 through third reducing portion 32, and the cross-sectional area of third reducing portion 32 reduces gradually from pump body 2 to sealing circulation piece 3's direction.
The top of the pump body 2 is provided with a discharge port 21, the oil subjected to 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 reducing part 32, the discharge valve 22 is used for controlling the communication between the pump body 2 and the sealing circulation piece 3, when the discharge valve 22 is opened, crude oil in the sealing circulation piece 3 can flow into the pump body 2, and when the discharge valve 22 is closed, crude oil in the sealing circulation piece 3 cannot enter the pump body 2.
Wherein form cavity 8 on sealing circulation spare 3 between part lateral wall, third reducing portion 32 and the last shell portion 11, sealing circulation spare 3 is equipped with through-hole 31 with the lateral wall of the one end that pump body 2 is connected, the fluid accessible through-hole 31 in the sealing circulation spare 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 and be full of the lubrication medium between pump body 2, sealing circulation spare 3 and the shell 1, to pump body 2, sealing circulation spare 3 and shell 1's mutual friction play lubrication action, can effectually alleviate wearing and tearing between the oil-well pump structure, play the effect of preventing the eccentric wear, the life of extension oil-well pump.
The oil sand separating structure 4 is used for intercepting large-particle sand in filtered crude oil, the oil sand separating structure 4 is arranged in the sand settling shell part 13 and can move up and down in the sand settling shell part 13, and specifically, the oil sand separating structure 4 comprises a separating cylinder 41 and a plurality of oil sand separating holes 42, wherein the separating cylinder 41 is in a cylindrical shape, the top of the separating cylinder 41 is in an opening structure, the cross-sectional area of the sealing circulation piece 3 is smaller than that of the separating cylinder 41, namely, the inner diameter of the sealing circulation piece 3 is smaller than that of the separating cylinder 41, the top of the separating cylinder 41 is communicated with the bottom of the sealing circulation piece 3 through a fourth reducing part 33, and the cross-sectional area of the fourth reducing part 33 gradually decreases from the separating cylinder 41 to the sealing circulation piece 3.
The oil sand separating holes 42 are uniformly distributed on the side wall of the separating cylinder 41, a lower chamber 9 is formed between the separating cylinder 41 and the sand settling shell part 13, crude oil can enter the lower chamber 9 from the 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 separating holes 42 to enter the separating cylinder 41, large-particle sand grains are intercepted outside the separating cylinder 41, and the large-particle sand grains which are intercepted and filtered settle in the lower chamber 9 under the action of gravity.
The suction valve 5 is connected to the bottom of the separating cylinder 41, the suction valve 5 is located right above the oil inlet 10, the suction valve 5 is used for opening and closing the oil inlet 10, specifically, the separating cylinder 41 can be driven to move to the oil inlet 10 in the downward moving process, the oil inlet 10 is closed in a blocking mode, the suction valve 5 can be driven to be away from the oil inlet 10 in the upward moving process of the separating cylinder 41, the oil inlet 10 is opened at the moment, crude oil can enter the lower cavity 9 through the oil inlet 10, and in the embodiment, the suction valve 5 can be moved to the oil inlet 10 or away from the oil inlet 10 to block the oil inlet 10. As another implementation manner, the suction valve 5 may 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 will not be described herein.
Preferably, the suction valve 5 is connected with the bottom of the separating cylinder 41 through the telescopic rod 6, the telescopic rod 6 can make telescopic movement, one end of the telescopic rod 6 is connected with the suction valve 5, the other end is connected with the bottom of the separating cylinder 41, in this embodiment, the telescopic rod 6 is an electric push rod, the telescopic rod 6 can drive the suction valve 5 to open or close the oil inlet 10, thus no matter the pump body 2 or the telescopic rod 6 drives the suction valve 5 to move to the oil inlet 10 or away from the oil inlet 10 no matter the upper stroke or the lower stroke is set, whether the oil inlet 10 is blocked or not is realized, and the phenomenon of 'airlock' of a common tube pump suction valve ball can be effectively avoided.
The multistage filtering structure 7 is arranged in the pump body 2, the multistage filtering structure 7 is used for filtering small-particle sand grains in oil entering the pump body 2, and specifically, the multistage filtering structure 7 comprises a plurality of filter screens 71, the plurality of filter screens 71 are sequentially arranged in the pump body 2 from top to bottom, as a preferential mode, the filter screens 71 are detachably arranged in the pump body 2, the multistage filtering structure 7 can form stepped multistage filtering for the oil, the plurality of filter screens 71 are at least two, the interval is arranged in the pump body 2, and the smaller the pore diameter of filter holes on the filter screens 71 which are closer to the discharge outlet 21 is, so that the step-by-step filtering of crude oil is realized. As another implementation manner, multiple stages of filtering holes are formed in the same filtering net 71, and the multiple stages of filtering holes are gradually reduced from bottom to top, so that multiple stages of filtering of oil in the pump body 2 can be realized. The multistage filtration structure 7 can carry out multistage filtration to the oil liquid entering the pump body 2, and can play a good role in sand prevention and anti-blocking.
The specific working principle of the invention is as follows:
as shown in fig. 5, before the upstroke starts, the pump body 2, the sealing circulation member 3 and the oil-sand separation structure 4 are integrally located at the lower portion of the housing 1, that is, the third reducing portion 32 abuts against the first reducing 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 upstroke, the pump body 2 moves upward, the sealing circulation member 3 and the separating cylinder 41 move upward along with the pump body 2, the third reducing portion 32 is far away from the first reducing portion 14, the fourth reducing portion 33 is abutted against the second reducing portion 15, meanwhile, the separating 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 liquid and small-particle sand particles in the crude oil liquid enter the separating cylinder 41 through the oil-sand separating hole 42, large-particle sand particles are trapped in the lower chamber 9, separated oil enters the sealing circulation member 3, and a part of oil enters the upper chamber 8 through the through hole 31 on the side wall of the sealing circulation member 3.
Before the downstroke 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 spill.
As shown in fig. 8, in the down stroke, the pump body 2 moves downward, the discharge valve 22 is opened, at this time, the pump body 2 and the seal circulation 3 are communicated, and the oil stored in the upper chamber 8 and the seal circulation 3 enters the pump body 2, passes through the multi-stage filter structure 7, and finally is discharged through the discharge port 21.
The oil-sand separation structure 4 and the multi-stage filtering structure 7 can effectively remove sand stones and sand grains in crude oil, reduce sand clamping sand grinding phenomenon, improve the service life of the oil pump, and have the advantages of simple and reasonable integral structure, large flow passage, small liquid flow resistance, simple construction, low cost and convenient popularization and application in a large range.
Example 2
This embodiment differs from embodiment 1 in that: in this embodiment, as shown in fig. 1, the buffer pad 101 is disposed at the oil inlet 10 at the bottom of the casing 1, the buffer pad 101 is made of rubber, and during operation of the oil pump, the suction valve 5 needs to be repeatedly moved to the oil inlet 10 and away from the oil inlet 10, so that abrasion between the suction valve 5 and the positions around the oil inlet 10 is easily caused for a long time, and the abrasion between the suction valve 5 and the positions around the oil inlet 10 can be effectively reduced due to the arrangement of the buffer pad 101, so that the service life of the oil pump is further prolonged.
Example 3
This embodiment differs 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, where the first filter screen 711 is disposed above the second filter screen 712, and the pore diameter of the filter pores on the first filter screen 711 is smaller than the pore diameter of the filter pores on the second filter screen 712. Preferably, in this embodiment, the filter screen 71 is a hard screen, and is in an umbrella-shaped structure or a conical structure with a rounded top, specifically, as shown in fig. 5, the first filter screen 711 is set to be in an umbrella-shaped structure, the screen of the first filter screen 711 protrudes towards the side where the discharge port 21 is located, the second filter screen 712 is set to be in a conical structure with a rounded top, and the contact area between the first filter screen 711 and the second filter screen 712 can be increased by setting the shapes of the first filter screen 711 and the second filter screen 712, so as to improve the filtration efficiency of the first filter screen 711 and the second filter screen 712.
It is to be understood that the above examples of the present invention are provided by way of illustration only and not by way of limitation of the embodiments of the present invention. Other variations or modifications of the above teachings will be apparent to those of ordinary skill in the art. It is not necessary here nor is it exhaustive of all embodiments. Any modification, equivalent replacement, improvement, etc. which come within the spirit and principles of the invention are desired to be protected by the following claims.
Claims (3)
1. An oil-sand separation type oil pump comprises a shell (1) with an opening at the top and an oil inlet (10) which is arranged at the bottom of the shell (1) and is used for allowing crude oil to enter; the method is characterized in that: the oil sand separating device also comprises a pump body (2), a sealing circulation piece (3) and an oil sand separating structure (4), wherein the pump body (2), the sealing circulation piece (3) and the oil sand separating structure (4) are arranged in the shell (1) and can move up and down, and the oil sand separating structure is used for intercepting and filtering large-particle sand in crude oil; the pump body (2), the sealing circulation piece (3) and the oil sand separation structure (4) are sequentially connected from top to bottom and communicated; the top of the pump body (2) is provided with a discharge outlet (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 sealing circulation piece (3); the oil-sand separation structure (4) is connected with a suction valve (5) for opening and closing the oil inlet (10);
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 separating cylinder (41) is communicated with the sealing circulation piece (3); the suction valve (5) is connected to the bottom of the separation cylinder (41);
the shell (1) comprises an upper shell part (11), a connecting shell part (12) and a sand sedimentation 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 separating cylinder (41) can move up and down in the sand sedimentation shell part (13);
the suction valve (5) is connected with the oil-sand separation structure (4) through a telescopic rod (6); a multistage filtering structure (7) for filtering sand grains in the oil liquid is arranged in the pump body (2); the multistage filtering structure (7) comprises a plurality of filter screens (71) which can form stepped multistage filtration for oil; a plurality of filter screens (71) are sequentially arranged in the pump body (2) from top to bottom;
the multistage filtering structure (7) comprises a first filter screen (711) and a second filter screen (712) which are sequentially arranged in the pump body (2) from top to bottom; the pore diameter of the filter holes of the first filter screen (711) is smaller than that of the filter holes of the second filter screen (712); an oil inlet (10) on the shell (1) is provided with a buffer pad (101) with a buffer effect.
2. The oil-sand separation type oil well pump according to claim 1, wherein: the cross-sectional area of the connection shell portion (12) is smaller than the cross-sectional area of the upper shell portion (11) and the cross-sectional area of the sand-settling shell portion (13); the cross-sectional area of the sealing flow-through member (3) is smaller than the cross-sectional area of the pump body (2) and the cross-sectional area of the separation cylinder (41).
3. The oil-sand separation type oil well pump according to claim 1, wherein: the side wall of one end of the sealing circulation piece (3) connected with the pump body (2) is provided with a through hole (31).
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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| CN114458592B true CN114458592B (en) | 2024-01-30 |
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Citations (6)
| 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 |
| 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 |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6926503B2 (en) * | 2002-09-27 | 2005-08-09 | Spx Corporation | Pump vibration reduction system |
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2022
- 2022-01-27 CN CN202210111185.8A patent/CN114458592B/en active Active
Patent Citations (6)
| 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 |
| 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 |
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|---|---|
| CN114458592A (en) | 2022-05-10 |
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