CN105526137A - Variable-displacement oil well pump - Google Patents
Variable-displacement oil well pump Download PDFInfo
- Publication number
- CN105526137A CN105526137A CN201510761620.1A CN201510761620A CN105526137A CN 105526137 A CN105526137 A CN 105526137A CN 201510761620 A CN201510761620 A CN 201510761620A CN 105526137 A CN105526137 A CN 105526137A
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- plunger
- pump
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- outer cylinder
- oil
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Abstract
The invention relates to the technical field of petroleum and gas field development, in particular to an oil well pump. A variable-displacement oil well pump consists of a large pump cylinder, a large plunger, a small plunger, an upper outer cylinder, a lower outer cylinder and an anchoring locking device; the bottom part of the large plunger is provided with an oil inlet valve; the top part of the small plunger is provided with an oil outlet valve; the anchoring locking device sheathes the bottom part of the lower outer cylinder; the large pump cylinder, the upper outer cylinder and the lower outer cylinder are connected in series in sequence to form a hollow outer cylinder; the large plunger is sleeved in the hollow outer cylinder; the small plunger is sleeved in the large plunger. The variable-displacement oil well pump disclosed by the invention is reasonable in structural design and feasible in technology; a structure that the large plunger and the smaller plunger are connected in series is matched with a wellhead variable-displacement string, therefore displacement conversion between oil well pumps different in displacement coefficient and a fracturing and swabbing combined operation function are realized; the operation is simple; the flowing back rate can be greatly increased, and turn drawing time and an unloading period are shortened; pollution of fracturing fluid or acid fluid on a stratum can be effectively reduced, the production efficiency is increased, and the requirements of unloading of an immovable string and a large-displacement pump and finding production of a small-displacement pump after oil testing, fracturing and acidizing in an exploratory well are met.
Description
Technical field
This use is novel relates to development technique field, oil gas field, is specifically related to a kind of oil well pump.
Background technique
The technique that current China is applied to formation testing discharge opeing has a lot.In the formation testing discharge opeing of LOW PERMEABILITY RESERVOIR
In process, especially after acid fracturing, formation testing fluid-discharge technology mainly contains and has 3 kinds below: 1. adopt sucker rod+common tubing pump discharge opeing; 2. continuous lever+conventional pressure break swabbing combined oil-well pump discharge opeing is adopted; 3.
Adopt flowing back by hydraulic pump.
Adopt common tubing pump discharge opeing, need to remove 2 times tubing strings, flow chart is many, and turn and to find time length, acid solution, fracturing fluid can not be discharged in time, and discharge opeing efficiency is low, easy polluted reservoir, affects formation testing effect after acid fracturing.
Adopt the discharge opeing of conventional pressure break swabbing combined oil-well pump, although achieve integrated function, fracturing fluid or acid solution efflux time still longer.According to flowing back by big pump, although can discharge fracturing fluid rapidly, the later stage, production declining, if still adopt former quantity oil pump lifting, then pump efficiency was low, energy consumption is high because stratum energy is low, feed flow is not enough.
Adopt flowing back by hydraulic pump, can join with the technological measure such as acid fracturing and do, drainage capacity is strong.But because the pump heart can not depart from pump barrel, so be usually sleeve pipe open flow.At this moment, the data such as stream pressure, high pressure property and shut-in pressure recovery cannot be enrolled, and the full parasexuality of oil test data is affected.Power fluid and production fluid blending, be unfavorable for the acquisition of prospect pit production fluid and Physical Property Analysis in formation testing simultaneously, the recovery supplementing and return discharge opeing of power fluid after being more unfavorable for acid fracturing measure, and energy consumption is high, pump efficiency is lower.
Summary of the invention
In order to solve the problem, the present invention is intended to propose a kind of change discharge capacity pressure break swabbing combined oil-well pump.
Technological scheme be:
A kind of displacement variable oil-well pump, by large pump barrel, large plunger, small plunger, upper urceolus, lower urceolus, grappling locking device forms; Large plunger base is provided with oiling valve; Small plunger top is provided with outlet valve; Grappling locking device is socketed in bottom lower urceolus; Wherein, large pump barrel, upper urceolus and lower urceolus are connected successively and are formed hollow urceolus; Be socketed with huge pillar plug in it, large plunger inner sleeve connects small plunger.
Preferably, described small plunger inside is provided with stuffing box gland.
Technique effect of the present invention is:
Reasonable in design of the present invention, technical feasibility, the supporting well head of large and small plunger cascaded structure becomes discharge capacity roofbolt, and the discharge capacity achieved between different displacements coefficient oil well pump is changed and function made by pressure break pumping connection, simple to operate.Greatly can improve discharge speed, shorten to turn and find time and the discharge opeing cycle; Effectively can reduce the pollution of fracturing fluid or acid solution formation, enhance productivity, after can meeting exploration well oil test fracture acidizing, the requirement of product asked by fixed tubular column, large discharge pump discharge opeing and small displacement pump.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention.
Wherein, the large pump barrel of 1-; The large plunger of 2-; 3-outlet valve; The upper urceolus of 4-; 5-small plunger; 6-stuffing box gland; Urceolus under 7-; 8-oiling valve; 9-grappling locking device.
Embodiment
A kind of displacement variable oil-well pump, by large pump barrel 1, large plunger 2, small plunger 5, upper urceolus 4, lower urceolus 7, grappling locking device 9 forms; Oiling valve 8 is provided with bottom large plunger 2; Small plunger 5 top is provided with outlet valve 3; Grappling locking device 9 is socketed in bottom lower urceolus 7; Wherein, large pump barrel 1, upper urceolus 4 and lower urceolus 7 are connected successively and are formed hollow urceolus; Huge pillar plug 2 is socketed with, socket small plunger 5 in large plunger 2 in it.Described small plunger 5 inside is provided with stuffing box gland 6.
In During Oil Testing Process, by outer cylinder portion G.I.H together with acid fracturing tubing string.After acid fracturing construction, the large plunger 2 of series connection with in rod string servant tubing string, is fixed spacing by grappling locking device 9 together with small plunger 5.Acid fracturing open flow is complete, first adopts large plunger 2 to carry out pumping discharge opeing, after liquid level is pumped into certain depth, changes small plunger 5 again carry out pumping discharge opeing by regulating well head sucker rod length.
During upstroke, cavity volume increases, and pressure reduces, and oiling valve 8 is opened, and in well, crude oil enters in the cavity of bottom through oiling valve 8.During down stroke, cavity volume reduces, and pressure raises, and oiling valve 8 cuts out, and the crude oil in cavity enters sucker rod and oil pipe annular space through outlet valve 3, is then discharged to ground.
Claims (2)
1. a displacement variable oil-well pump, is characterized in that: by large pump barrel (1), large plunger (2), small plunger (5), upper urceolus (4), lower urceolus (7), and grappling locking device (9) forms; Large plunger (2) bottom is provided with oiling valve (8); Small plunger (5) top is provided with outlet valve (3); Grappling locking device (9) is socketed in lower urceolus (7) bottom; Wherein, large pump barrel (1), upper urceolus (4) and lower urceolus (7) are connected successively and are formed hollow urceolus; Huge pillar plug (2) is socketed with, socket small plunger (5) in large plunger (2) in it.
2. as claim 1 displacement variable oil-well pump, it is characterized in that: described small plunger (5) inside is provided with stuffing box gland (6).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510761620.1A CN105526137A (en) | 2015-11-11 | 2015-11-11 | Variable-displacement oil well pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510761620.1A CN105526137A (en) | 2015-11-11 | 2015-11-11 | Variable-displacement oil well pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105526137A true CN105526137A (en) | 2016-04-27 |
Family
ID=55768569
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510761620.1A Pending CN105526137A (en) | 2015-11-11 | 2015-11-11 | Variable-displacement oil well pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105526137A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109812407A (en) * | 2017-11-21 | 2019-05-28 | 中国石油化工股份有限公司 | A kind of automatic change discharge capacity lifting device |
| 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 |
-
2015
- 2015-11-11 CN CN201510761620.1A patent/CN105526137A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109812407A (en) * | 2017-11-21 | 2019-05-28 | 中国石油化工股份有限公司 | A kind of automatic change discharge capacity lifting device |
| CN109812407B (en) * | 2017-11-21 | 2020-03-24 | 中国石油化工股份有限公司 | Automatic variable-displacement lifting device |
| 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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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| WD01 | Invention patent application deemed withdrawn after publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20160427 |