CN101846062A - Displacement variable oil-well pump - Google Patents
Displacement variable oil-well pump Download PDFInfo
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- CN101846062A CN101846062A CN 201010197029 CN201010197029A CN101846062A CN 101846062 A CN101846062 A CN 101846062A CN 201010197029 CN201010197029 CN 201010197029 CN 201010197029 A CN201010197029 A CN 201010197029A CN 101846062 A CN101846062 A CN 101846062A
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Abstract
The invention relates to a displacement variable oil-well pump. A pump cylinder, a connecting pipe, an oil inlet valve and a small pump are sequentially connected; a large plunger, an oil outlet valve and an uncoupling device are sequentially connected, an oil inlet is arranged between the oil outlet valve and an upper body of the uncoupling device, the diameter of the upper body of the uncoupling device is less than the internal diameter of the large pump cylinder, the inner diameter of the connecting pipe is more than that of the large pump cylinder to ensure that the joint of the lower part of the large pump cylinder and the upper part of the connecting pipe generates a releasing ledge, and the upper body of the uncoupling device and the lower body of the uncoupling device can be separated at the releasing ledge. Due to the combination of the large cylinder and the connecting pipe, a releasing ledge of the uncoupling device is formed, and the displacement of the oil-well pump can be changed by adopting the common uncoupling device; because the outer diameter of the lower body of the common uncoupling device is more than the internal diameter of the releasing ledge, only the uncoupling device is released after lifted to the releasing ledge, and the uncoupling device can be released as long as being lifted to the releasing ledge. The invention can be used for reliably changing the displacement and prolonging the oil well production period, and has remarkable economic benefit.
Description
Technical field
The invention belongs to the equipment of oil field oil pumping usefulness, particularly a kind of displacement variable oil-well pump.
Background technique
The pumping well that has is taken out initial stage production fluid amount height opening, viscosity of crude is low, as the thick oil well of exploiting behind the steam soak, need big discharge capacity production, to take out the initial stage viscosity of crude low owing to open, it is descending also not need oil well pump to have feedback force to help oil well pump, descend in the later stage production fluid amount that drives a well, viscosity of crude raises, and needs the oil pumping pump delivery to diminish, need simultaneously oil well pump to have feedback force to help that it is descending, common oil well pump does not adapt to this variation and requirement yet.Chinese patent application 89206034.4 " becoming the discharge capacity thick oil pump " requires design into this, because its design proposal can not adopt uncoupling device commonly used, have to specialized designs one cover uncoupling device (6), in order to adapt to the invention requirement, this cover uncoupling device is to descend initial point to take off and connecing, by alternately bump pump realize to connect, this uncoupling method is not easy correctly to finish at the scene, owing to want repeated multiple times adjustment sucker rod length before taking out opening, make it satisfy the length of thread engagement of sucker rod top and well head, the operator misremembers sometimes and adjusts and bump the pump number of times, can not know accurately that the uncoupling device is in the state that takes off or connect, oil well can not accurately be produced by expection, and also there is very big deficiency in the way of coming analysis and judgement uncoupling device to be in what state by the creation data after driving a well subsequently.And all uncoupling devices all can not just can really dock in a docking operation, sometimes need repeatedly to contact and to dock successfully, and the disengagement mode of the uncoupling device in the Chinese patent application 89206034.4 " becoming the discharge capacity thick oil pump " can not just can be thrown off equally in disposable operation.Therefore, become discharge capacity pumping technology poor reliability, can not satisfy needs as the thick oil well of exploiting behind the steam soak.
Summary of the invention
The objective of the invention is to design a kind of displacement variable oil-well pump, overcome the deficiencies in the prior art, improve the reliability that becomes discharge capacity, prolong the oil well production cycle, increase economic efficiency.
The object of the present invention is achieved like this: by big pump barrel; Big plunger; Tube connector; Delivery valve; Disconnecting device; Inlet valve; Little pump barrel; Small plunger forms; Big pump barrel bottom is connected with tube connector top; The tube connector bottom is connected with inlet valve top; The inlet valve bottom is connected with little pump barrel top; Big plunger bottom is connected with delivery valve top; The delivery valve bottom is connected with the upper body of disconnecting device; The lower body of disconnecting device is connected with small plunger top; The upper body of disconnecting device and the lower body of disconnecting device are docking integrally; Between the upper body of delivery valve and disconnecting device oil-in is arranged; Big pump barrel cooperates with big plunger; Little pump barrel cooperates with small plunger; The diameter of the upper body of disconnecting device is less than the internal diameter of big pump barrel; Big pump barrel can be passed through in the upper body of disconnecting device; The internal diameter of tube connector is greater than the internal diameter of big pump barrel; Its big pump barrel bottom and junction, tube connector top are formed discharge shoulder; Length between the release cover of the lower body of release shoulder and disconnecting device is greater than the oil pumping throw of pump; The release cover external diameter of the lower body of disconnecting device is less than the internal diameter of tube connector; The release cover external diameter of the lower body of disconnecting device is greater than the internal diameter of big pump barrel, and the upper body of disconnecting device and the lower body of disconnecting device can discharge the disengagement of shoulder place.
Install every pressing valve little pump barrel bottom.
There is the draining hole at big pump barrel middle part.
The invention has the beneficial effects as follows: the combination of big pump barrel and connecting tube, formed the release shoulder of uncoupling device, can adopt uncoupling device commonly used to realize the change of oil well pump discharge capacity, because the following body diameter of uncoupling device commonly used is greater than the internal diameter that discharges shoulder, therefore, have only after mentioning the release shoulder on the uncoupling device and could discharge, as long as just can discharge with carrying on the uncoupling device to discharging shoulder, these two requirements can realize at the scene, therefore, the present invention can change the oil pumping pump delivery reliably, prolongs the oil well production cycle, has remarkable economic efficiency.
Description of drawings
Accompanying drawing 1 is the schematic representation when the uncoupling device docks in the embodiment of the invention.
Accompanying drawing 2 is the schematic representation when the uncoupling device is thrown off in the embodiment of the invention.
Embodiment
Below in conjunction with accompanying drawing embodiments of the invention are described.
By big pump barrel 1; Big plunger 2; Tube connector 3; Delivery valve 4; Disconnecting device 5; Inlet valve 6; Little pump barrel 7; Small plunger 8 forms; Big pump barrel 1 bottom is connected with tube connector 3 tops; Tube connector 3 bottoms are connected with inlet valve 6 tops; Inlet valve 6 bottoms are connected with little pump barrel 7 tops; Big plunger 2 bottoms are connected with delivery valve 4 tops; Delivery valve 4 bottoms are connected with the upper body 5s of disconnecting device 5; The lower body 5x of disconnecting device 5 is connected with small plunger 8 tops; The upper body 5s of disconnecting device 5 and the lower body 5x of disconnecting device 5 are docking integrally; Between the upper body 5s of delivery valve 4 and disconnecting device 5 oil-in 12 is arranged; Big pump barrel 1 cooperates with big plunger 2; Little pump barrel 7 cooperates with small plunger 8; The diameter of the upper body 5s of disconnecting device 5 is less than the internal diameter of big pump barrel 1; The upper body 5s of disconnecting device 5 can pass through big pump barrel 1; The internal diameter of tube connector 3 is greater than the internal diameter of big pump barrel 1; Its big pump barrel 1 bottom and junction, tube connector 3 top are formed discharge shoulder 11; Length between the release cover 5t of the lower body 5x of release shoulder 11 and disconnecting device 5 is greater than the oil pumping throw of pump; Be 6m such as throw of pump; The length that then discharges between the release cover 5t of lower body 5x of shoulder 11 and disconnecting device 5 is greater than 6m; The release cover 5t of the lower body 5x of disconnecting device 5 can not arrive and discharge shoulder 11 places when guaranteeing the small displacement oil pumping; For adapting to this requirement; Big pump barrel 1 is made as short pump barrel; Big plunger 2 is made as long-plunger; The release cover 5t external diameter of the lower body 5x of disconnecting device 5 is less than the internal diameter of tube connector 3; The release cover 5t external diameter of the lower body 5x of disconnecting device 5 is greater than the internal diameter of big pump barrel 1, and the upper body 5s of disconnecting device 5 and the lower body 5x of disconnecting device 5 can discharge the disengagement of shoulder 11 places. As big pump barrel 1 be
Pump, little pump barrel 7 is
Pump, connecting tube 3 adopts internal diameter to be
Oil pipe, diameter difference are 6mm, can be as the release shoulder of uncoupling device.
Install every pressing valve 9 little pump barrel 7 bottoms, and purpose is the feedback force when increasing the float amount, makes of the present inventionly to take out thick ability and increase.Every pressing valve 9 is one-way valve, and the liquid of small plunger 8 bottoms can be discharged, and the liquid in the sleeve pipe can not enter, and purpose is that the lost fluid between small plunger and the pump barrel is drained in the sleeve pipe.
There is draining hole 10 at big pump barrel 1 middle part, and oil pump tubular column can draining during pump detection and workover, avoids band spray operation.When big plunger 2 cooperated oil pumping with big pump barrel 1, draining hole 10 was blocked by big plunger 2 all the time, can normally pump, and this is to be short pump barrel by big pump barrel, and big plunger 2 is that long-plunger determines.When pump detection and workover, big plunger 2 is suggested big pump barrel 1, big pump barrel 1 and oil well casing UNICOM, and the liquid earial drainage in the oil pipe on the big pump barrel 1 is to oil well casing, and therefore, being lowered to oil pump tubular column of the present invention does not need to install oil drainer.
When going into the well, big pump barrel 1, connecting tube 3, the lower body 5x of uncoupling device 5, oiling valve 6; little pump barrel 7; small plunger 8; every pressing valve 9; big plunger 2 tops are connected with rod string; big plunger 2; outlet valve 4; the upper body 5s of uncoupling device 5 is lowered to sucker rod; the lower body 5x of uncoupling device 5 will dock when contact with the upper body 5s of uncoupling device 5 and be integral; as shown in Figure 1 with the tubing string G.I.H; but the initial stage that drives a well do not need butt joint; on carry sucker rod and arrive to uncoupling device 5 and discharge shoulders 11 places; two bodies about uncoupling device 5 throws off to become; bottom the lower body 5x of uncoupling device 5 and small plunger 8 fall to; transferring sucker rod state extremely as shown in Figure 2, make sucker rod be connected oil pumping with pumping unit, is big pump displacement; do not have feedback force, can adapt to the oil well initial production at this moment.After well deliverability decline or viscosity increase, need discharge capacity of the present invention to diminish and when having feedback force, well head is transferred sucker rod, the lower body 5x of uncoupling device 5 contacts butt joint and is integral with the upper body 5s of uncoupling device 5, as Fig. 1 state, open again and take out production, make uncoupling device 5 discharge operation under the shoulder 11, sucker rod will drive big plunger 1, small plunger 8 moves oil pumping simultaneously, this moment, discharge capacity of the present invention was that big pump reduces pump delivery, pump internal pressure height during down stroke, the pump pressure outside is low, because the area of big plunger 2 is greater than the area of small plunger 8, therefore, the area that high pressure is born in big plunger 2 upper-end surfaces bears the area of high pressure greater than big plunger 2 lower end surfaces, produce a downward power under area difference and pressure effect, this power is called feedback force, and this power helps sucker rod descending, thereby overcome the surface friction drag of viscous crude, make thick oil well energy ordinary production sucker rod.Owing to have every pressing valve 9, small plunger 8 lower end surfaces do not have pressure, so, feedback force is the outlet pressure that the difference of the area of the area of big plunger 2 and small plunger 8 multiply by pump, and therefore, feedback force is only relevant deeply with pump, after the dark decision of pump, feedback force is just constant, and irrelevant with well fluid level, producing fluid level can not reduce feedback force.
The draining hole 10 at big pump barrel 1 middle part also can be used for steam injection.
The oil pumping throw of pump is meant the reciprocating stroke of plunger.
Claims (3)
1. displacement variable oil-well pump; By big pump barrel (1); Big plunger (2); Tube connector (3); Delivery valve (4); Disconnecting device (5); Inlet valve (6); Little pump barrel (7); Small plunger (8) forms; Big pump barrel (1) bottom is connected with tube connector (3) top; Tube connector (3) bottom is connected with inlet valve (6) top; Inlet valve (6) bottom is connected with little pump barrel (7) top; Big plunger (2) bottom is connected with delivery valve (4) top; Delivery valve (4) bottom is connected with the upper body (5s) of disconnecting device (5); The lower body (5x) of disconnecting device (5) is connected with small plunger (8) top; The upper body (5s) of disconnecting device (5) is docking integrally with the lower body (5x) of disconnecting device (5); Between the upper body (5s) of delivery valve (4) and disconnecting device (5) oil-in (12) is arranged; Big pump barrel (1) cooperates with big plunger (2); Little pump barrel (7) cooperates with small plunger (8); The diameter of the upper body (5s) of disconnecting device (5) is less than the internal diameter of big pump barrel (1); Big pump barrel (1) can be passed through in the upper body (5s) of disconnecting device (5); It is characterized in that: the internal diameter of tube connector (3) is greater than the internal diameter of big pump barrel (1); Its big pump barrel (1) bottom and tube connector (3) junction, top are formed discharge shoulder (11); Length between the release cover (5t) of the lower body (5x) of release shoulder (11) and disconnecting device (5) is greater than the oil pumping throw of pump; Release cover (5t) external diameter of the lower body (5x) of disconnecting device (5) is less than the internal diameter of tube connector (3); Release cover (5t) external diameter of the lower body (5x) of disconnecting device (5) is greater than the internal diameter of big pump barrel (1), and the upper body (5s) of disconnecting device (5) and the lower body (5x) of disconnecting device (5) can be located to throw off at release shoulder (11).
2. displacement variable oil-well pump according to claim 1 is characterized in that: install every pressing valve (9) little pump barrel (7) bottom.
3. displacement variable oil-well pump according to claim 1 is characterized in that: there is draining hole (10) at big pump barrel (1) middle part.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010197029 CN101846062A (en) | 2010-05-26 | 2010-05-26 | Displacement variable oil-well pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010197029 CN101846062A (en) | 2010-05-26 | 2010-05-26 | Displacement variable oil-well pump |
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| Publication Number | Publication Date |
|---|---|
| CN101846062A true CN101846062A (en) | 2010-09-29 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201010197029 Pending CN101846062A (en) | 2010-05-26 | 2010-05-26 | Displacement variable oil-well pump |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110761982A (en) * | 2018-07-26 | 2020-02-07 | 中国石油化工股份有限公司 | Variable-displacement injection-production integrated lifting device |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2049283U (en) * | 1989-04-28 | 1989-12-13 | 河南石油勘探局采油工艺研究所 | Displacement-varying thick oil pump |
| RU2263207C1 (en) * | 2004-02-16 | 2005-10-27 | Общество с ограниченной ответственностью Когалымский научно-исследовательский и проектный институт нефти (ООО "КогалымНИПИнефть") | Hydroimpulsive well development plant |
| CN201041148Y (en) * | 2007-04-26 | 2008-03-26 | 白霞 | Oil pump coupling-uncoupling device |
| CN101220809A (en) * | 2007-12-14 | 2008-07-16 | 大庆油田有限责任公司 | Sand-prevention and oil-draining type oil pump |
| CN201687692U (en) * | 2010-05-26 | 2010-12-29 | 苗在朝 | Variable-displacement oil pump |
-
2010
- 2010-05-26 CN CN 201010197029 patent/CN101846062A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2049283U (en) * | 1989-04-28 | 1989-12-13 | 河南石油勘探局采油工艺研究所 | Displacement-varying thick oil pump |
| RU2263207C1 (en) * | 2004-02-16 | 2005-10-27 | Общество с ограниченной ответственностью Когалымский научно-исследовательский и проектный институт нефти (ООО "КогалымНИПИнефть") | Hydroimpulsive well development plant |
| CN201041148Y (en) * | 2007-04-26 | 2008-03-26 | 白霞 | Oil pump coupling-uncoupling device |
| CN101220809A (en) * | 2007-12-14 | 2008-07-16 | 大庆油田有限责任公司 | Sand-prevention and oil-draining type oil pump |
| CN201687692U (en) * | 2010-05-26 | 2010-12-29 | 苗在朝 | Variable-displacement oil pump |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110761982A (en) * | 2018-07-26 | 2020-02-07 | 中国石油化工股份有限公司 | Variable-displacement injection-production integrated lifting device |
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| PB01 | Publication | ||
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Application publication date: 20100929 |