CN207315317U - A kind of rod-pumped well Rodless oil extraction tubing string - Google Patents
A kind of rod-pumped well Rodless oil extraction tubing string Download PDFInfo
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- CN207315317U CN207315317U CN201721204438.7U CN201721204438U CN207315317U CN 207315317 U CN207315317 U CN 207315317U CN 201721204438 U CN201721204438 U CN 201721204438U CN 207315317 U CN207315317 U CN 207315317U
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Abstract
The utility model provides a kind of rod-pumped well Rodless oil extraction tubing string, including sequentially connected polished rod from top to bottom, fluid power plunger pump, concentric double pipe, dual plunger sucker rod pump, screen casing and oil pipe, polished rod upper end connects pumping unit horsehead, lower end is connected with the piston rod of fluid power plunger pump, and fluid power plunger pump, concentric double pipe, dual plunger sucker rod pump three connect to form inside and outside two runners.Using beam pumping unit as driving equipment, supporting underground hydraulic plunger pump, concentric double pipe, dual plunger sucker rod pump carry out the novel technological method of Rodless oil extraction, directional well, high angle hole side-abrasion of rod string contradiction in artificial lift mode recovery process are fundamentally solved, the oil well operation frequency is reduced, extends pump detection period；It can effectively solve the problem that at the same time at present with latent oil directly-driven screw pump, oil immersion line motor Rodless oil extraction and water base fluid power Rodless oil extraction technique, there are the problem of one-time investment is of high cost, system structure is complicated, stability is not high, field conduct is complicated.
Description
Technical field
The utility model belongs to oil recovery technique field, and in particular to a kind of rod-pumped well Rodless oil extraction tubing string.
Background technology
Since well yield is relatively low, more than 90% oil well is carried out using pumping unit artificial lift mode in most domestic oil field
Production development, the especially raising recently as drilling technology level, machine-pumped oil well well track it is more using directional well, high angle hole as
Main, in process of production, oil pumping pipe rod eccentric wear problem, which is one, can not avoid and production contradiction urgently to be resolved hurrily, major embodiment
Since side-abrasion of rod string causes rod parting, oil pipe eccentric wear to be perforated and light maintenance work operations amount occurs and increases year by year, light maintenance is made
Industry expense remains high, and on the one hand improves oil mining cost, on the other hand reduces rate when oil well drives a well, and influences oil well production
Amount.Tube rod righting anti-abrasion technology research and application have persistently been carried out in domestic each oil field for this, slow down to a certain extent
Side-abrasion of rod string contradiction, but still can not fundamentally solve.
In order to fundamentally solve the problems, such as directional well, high angle hole side-abrasion of rod string, oil development level is improved, it is domestic different
Oil well Rodless oil extraction technology research application has been carried out in oil field, mainly there is two ways at present：First, water base fluid power is adopted without bar
Oily technique, mainly configures hydraulic drive system on ground, replaces former machine-pumped oil well oil pumping machine equipment, while match somebody with somebody in pit shaft
Special oil pipe and double-action plunger pump are covered, forms high-pressure water-based power fluid by ground installation, driving downhole pump work will
Stratum production liquid is lifted to ground in pit shaft.Field test application shows, the technique and system need supporting special ground installation, one
Secondary property cost of investment is high；In addition the supporting Special subsurface pump in underground is complicated, and job stability is not high；Process is driven in power fluid
In, it is higher to the leakproofness of tubing string, cause current scene can not large-scale promotion application.Second, using latent oil directly-driven screw pump,
Oil immersion line motor carries out Rodless oil extraction, using plain tubing by under latent oil direct driving motor and supporting screw pump, Special subsurface pump
Enter in pit shaft, supporting tripping in power cable in pit shaft, electric drive motor, oil well pump carry out Rodless oil extraction；This kind of technique is being answered
Supporting private cable is needed during, make a trip complexity during field conduct, of high cost；In addition for low liquid producing well, deposit
In dry tap, burn-down of electrical machinery risk, simultaneity factor structure is more complicated, and stability is not high.
The content of the invention
The purpose of the utility model is to overcome above-mentioned technical problem existing in the prior art, fundamentally solves wellbore rail
Mark Holes of Complicated Wells side-abrasion of rod string produces contradiction.
For this reason, the utility model provides a kind of rod-pumped well Rodless oil extraction tubing string, including it is sequentially connected from top to bottom
Polished rod, fluid power plunger pump, concentric double pipe, dual plunger sucker rod pump, screen casing and oil pipe, the polished rod upper end connect pumping unit horsehead,
Lower end is connected with the piston rod of fluid power plunger pump, and the fluid power plunger pump, concentric double pipe, dual plunger sucker rod pump three connect shape
Into inside and outside two runners.
The dual plunger sucker rod pump includes oil well pump pump chamber, oil well pump movable plunger and oil well pump non-movable piston, the pumping
Oil pump movable plunger upper end is connected with oil well pump pump chamber, and lower end is oil well pump non-movable piston, is set in the oil well pump movable plunger
There is travelling valve, the oil well pump non-movable piston upper end is equipped with fixed valve, and lower end is equipped with the central passage communicated with screen casing.
Runner centered on the inner tube of the concentric double pipe, is annular fiowpath between center flow channels and outer tube, the fluid power column
Fill in and first annular cavity is equipped with outside the hydraulic cavities of pump, the oil well pump pump chamber of the dual plunger sucker rod pump is externally provided with the second annular sky
Chamber；
Hydraulic cavities, the center flow channels of concentric double pipe of the fluid power plunger pump connect to form one with the second toroidal cavity three
Bar runner, chamber gap, stream between the screen casing, central passage, fixed valve, oil well pump movable plunger and oil well pump non-movable piston
Dynamic valve, oil well pump pump chamber, annular fiowpath and first annular cavity are sequentially communicated to form another runner.
The polished rod, fluid power plunger pump, concentric double pipe, dual plunger sucker rod pump, screen casing pass through screwed connection between any two.
The pumping unit horsehead uses varied rigid link with polished rod.
The beneficial effects of the utility model are：The utility model, as driving equipment, is matched somebody with somebody using conventional beam-pumping unit
The novel technological method that underground hydraulic plunger pump, concentric double pipe, dual plunger sucker rod pump carry out Rodless oil extraction is covered, primarily to from
Directional well, high angle hole side-abrasion of rod string contradiction in artificial lift mode recovery process are fundamentally solved, reduces oil well operation frequency
Secondary, extension pump detection period；At the same time can effectively solve the problem that at present with latent oil directly-driven screw pump, oil immersion line motor Rodless oil extraction with
And there are one-time investment is of high cost, system structure is complicated, stability is not high, field conduct behaviour for water base fluid power Rodless oil extraction technique
Make the problem of complicated, provided for the serious machine-pumped oil well development Rodless oil extraction technology application of side-abrasion of rod string, upgrading a kind of new
Technological means.
It is described in further details below in conjunction with attached drawing.
Brief description of the drawings
Fig. 1 is the application schematic diagram of the utility model；
Fig. 2 is the structure diagram of the utility model.
In figure：1st, pumping unit horsehead；2nd, polished rod；3rd, fluid power plunger pump；4th, concentric double pipe；5th, dual plunger sucker rod pump；6th, sieve
Pipe；7th, oil pipe；8th, piston rod；9th, piston；10th, hydraulic cavities；11st, casing；12nd, annular fiowpath；13rd, center flow channels；14th, first
Toroidal cavity；15th, the second toroidal cavity；16th, oil well pump pump chamber；17th, oil well pump movable plunger；18th, travelling valve；19th, fixed valve；
20th, oil well pump non-movable piston；21st, central passage；22nd, artificial bottom of a well.
Embodiment
Embodiment 1：
Present embodiments provide a kind of rod-pumped well Rodless oil extraction tubing string, including sequentially connected polished rod 2, liquid from top to bottom
Power plunger pump 3, concentric double pipe 4, dual plunger sucker rod pump 5, screen casing 6 and oil pipe 7,2 upper end of polished rod connect pumping unit horsehead 1,
Lower end is connected with the piston rod 8 of fluid power plunger pump 3, the fluid power plunger pump 3, concentric double pipe 4,5 three of dual plunger sucker rod pump
Two runners inside and outside connection formation.
As shown in Figure 1, by rod-pumped well Rodless oil extraction tubing string tripping in casing 11, using conventional beam-pumping unit conduct
Driving equipment, supporting underground hydraulic plunger pump 3, concentric double pipe 4, dual plunger sucker rod pump 5 carry out Rodless oil extraction, fundamentally solve
Well track Holes of Complicated Wells side-abrasion of rod string produces contradiction.
Embodiment 2：
On the basis of embodiment 1, a kind of rod-pumped well Rodless oil extraction tubing string is present embodiments provided, the double plunger is taken out
Oil pump 5 includes oil well pump pump chamber 16, oil well pump movable plunger 17 and oil well pump non-movable piston 20, the oil well pump movable plunger 17
Upper end is connected with oil well pump pump chamber 16, and lower end is oil well pump non-movable piston 20, is equipped with the oil well pump movable plunger 17 travelling
Valve 18,20 upper end of oil well pump non-movable piston are equipped with fixed valve 19, and lower end is equipped with the central passage 21 communicated with screen casing 6.
As shown in Fig. 2, runner 13 centered on the inner tube of the concentric double pipe 4, is annular space between center flow channels 13 and outer tube
Runner 12, the outside of hydraulic cavities 10 of the fluid power plunger pump 3 are equipped with first annular cavity 14, the pumping of the dual plunger sucker rod pump 5
Oil pump pump chamber 16 is externally provided with the second toroidal cavity 15；
The hydraulic cavities 10 of the fluid power plunger pump 3,13 and second toroidal cavity of center flow channels, 15 three of concentric double pipe 4 connect
It is logical to form a runner, the screen casing 6, central passage 21, fixed valve 19, oil well pump movable plunger 17 and oil well pump non-movable piston
Between 20 chamber gap, flow valve, oil well pump pump chamber 16, annular fiowpath 12 and first annular cavity 14 be sequentially communicated to be formed it is another
Bar runner.
Wherein, hydraulic cavities 10 of the power liquid in plunger pump, 13 and second toroidal cavity 15 of the center flow channels of concentric double pipe 4
Three connects flowing in the runner to be formed.
In the present embodiment, the polished rod 2, fluid power plunger pump 3, concentric double pipe 4, dual plunger sucker rod pump 5, screen casing 6 be two-by-two
Between pass through screwed connection.
The pumping unit horsehead 1 uses varied rigid link with polished rod 2.Varied rigid link be between rigid connection and it is hinged between,
I.e. connection can bear certain moment of flexure, and certain rotation can occur, it is ensured that polished rod 2 can be real under the drive of pumping unit horsehead 1
Moved back and forth under existing vertical, loading condition.
Embodiment 3：
On the basis of embodiment 2, a kind of rod-pumped well Rodless oil extraction method, including following two are present embodiments provided
Point：
During pumping unit down stroke：Pumping unit horsehead 1 drives the piston rod 8 of fluid power plunger pump 3 by polished rod 2, makes piston 9
Run downwards, power liquid in compression hydraulic chamber 10, power liquid enters oil well pump activity by 4 center flow channels 13 of concentric double pipe
Chamber between plunger 17 and non-movable piston, power liquid hydraulic coupling driving oil well pump movable plunger 17 are run up, and oil well pump is lived
Travelling valve 18 is closed in dynamic plunger 17, pressure rise in oil well pump pump chamber 16, and liquid is produced successively in stratum in driving oil well pump pump chamber 16
Ground is lifted to by the annular fiowpath 12 of concentric double pipe 4, first annular cavity 14；Oil well pump movable plunger 17, oil pumping at the same time
Chamber gap increase, pressure reduce between pump non-movable piston 20, fix valve 19 in oil well pump non-movable piston 20 and open, stratum production liquid
Pass through screen casing 6（Stratum production liquid sequentially enters oil pipe 7, screen casing 6 by artificial bottom of a well 22）, 20 central passage of oil well pump non-movable piston
21st, fixed valve 19 is entered between oil well pump non-movable piston 20 and oil well pump movable plunger 17 in chamber gap, completes discharge opeing
Journey.
During pumping unit up stroke：Polished rod 2 drives the piston 9 of fluid power plunger pump 3 to run up, and makes hydraulic cavities 10, oil well pump
Pressure declines in chamber gap between movable plunger 17 and oil well pump non-movable piston 20, at this time due to fluid column in oil well pump pump chamber 16
Pressure, driving oil well pump movable plunger 17 are run downwards, and travelling valve 18 is opened, and fixed valve 19 is closed, oil well pump movable plunger 17
Chamber gap is compressed between oil well pump non-movable piston 20, pressure rise, stratum production liquid enter oil well pump pump chamber 16, complete into
Liquid process.
Above example belongs to the common knowledge and known technology of the art without the part specifically described, herein
No longer describe in detail one by one.
Exemplified as above is only for example, not forming to the scope of protection of the utility model to the utility model
Limitation, it is every to be belonged to the same or similar design of the utility model within the scope of protection of the utility model.
Claims (5)
- A kind of 1. rod-pumped well Rodless oil extraction tubing string, it is characterised in that：Including sequentially connected polished rod from top to bottom（2）, fluid power Plunger pump（3）, concentric double pipe（4）, dual plunger sucker rod pump（5）, screen casing（6）And oil pipe（7）, the polished rod（2）Upper end connection is taken out Oil machine horse head（1）, lower end and fluid power plunger pump（3）Piston rod（8）Connection, the fluid power plunger pump（3）, concentric double pipe （4）, dual plunger sucker rod pump（5）Three connects to form inside and outside two runners.
- A kind of 2. rod-pumped well Rodless oil extraction tubing string according to claim 1, it is characterised in that：The dual plunger sucker rod pump （5）Including oil well pump pump chamber（16）, oil well pump movable plunger（17）With oil well pump non-movable piston（20）, the oil well pump portable pillar Plug（17）Upper end and oil well pump pump chamber（16）Connection, lower end is oil well pump non-movable piston（20）, the oil well pump movable plunger （17）It is interior to be equipped with travelling valve（18）, the oil well pump non-movable piston（20）Upper end is equipped with fixed valve（19）, lower end is equipped with and screen casing （6）The central passage communicated（21）.
- A kind of 3. rod-pumped well Rodless oil extraction tubing string according to claim 1 or 2, it is characterised in that：The concentric double pipe （4）Inner tube centered on runner（13）, center flow channels（13）It is annular fiowpath between outer tube（12）, the fluid power plunger pump （3）Hydraulic cavities（10）Outside is equipped with first annular cavity（14）, the dual plunger sucker rod pump（5）Oil well pump pump chamber（16）Outside Equipped with the second toroidal cavity（15）；The fluid power plunger pump（3）Hydraulic cavities（10）, concentric double pipe（4）Center flow channels（13）With the second toroidal cavity（15） Three connects to form a runner, the screen casing（6）, central passage（21）, fixed valve（19）, oil well pump movable plunger（17）With Oil well pump non-movable piston（20）Between chamber gap, flow valve, oil well pump pump chamber（16）, annular fiowpath（12）With first annular sky Chamber（14）It is sequentially communicated to form another runner.
- A kind of 4. rod-pumped well Rodless oil extraction tubing string according to claim 1 or 2, it is characterised in that：The polished rod（2）、 Fluid power plunger pump（3）, concentric double pipe（4）, dual plunger sucker rod pump（5）, screen casing（6）Pass through screwed connection between any two.
- A kind of 5. rod-pumped well Rodless oil extraction tubing string according to claim 1 or 2, it is characterised in that：The pumping unit donkey Head（1）With polished rod（2）Using varied rigid link.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721204438.7U CN207315317U (en) | 2017-09-20 | 2017-09-20 | A kind of rod-pumped well Rodless oil extraction tubing string |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721204438.7U CN207315317U (en) | 2017-09-20 | 2017-09-20 | A kind of rod-pumped well Rodless oil extraction tubing string |
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| CN207315317U true CN207315317U (en) | 2018-05-04 |
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| CN201721204438.7U Active CN207315317U (en) | 2017-09-20 | 2017-09-20 | A kind of rod-pumped well Rodless oil extraction tubing string |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107630685A (en) * | 2017-09-20 | 2018-01-26 | 中国石油天然气股份有限公司 | A kind of rod-pumped well Rodless oil extraction tubing string and method |
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2017
- 2017-09-20 CN CN201721204438.7U patent/CN207315317U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107630685A (en) * | 2017-09-20 | 2018-01-26 | 中国石油天然气股份有限公司 | A kind of rod-pumped well Rodless oil extraction tubing string and method |
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