CN111206908A - Oil pumping device of electric screw pump capable of separately pumping and mixing out oil submersible oil - Google Patents
Oil pumping device of electric screw pump capable of separately pumping and mixing out oil submersible oil Download PDFInfo
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- CN111206908A CN111206908A CN202010285101.3A CN202010285101A CN111206908A CN 111206908 A CN111206908 A CN 111206908A CN 202010285101 A CN202010285101 A CN 202010285101A CN 111206908 A CN111206908 A CN 111206908A
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- pump
- oil
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- check valve
- pumping
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- 238000005086 pumping Methods 0.000 title claims abstract description 32
- 230000001012 protector Effects 0.000 claims abstract description 23
- 239000012530 fluid Substances 0.000 claims description 17
- 230000009189 diving Effects 0.000 claims 3
- 239000010410 layer Substances 0.000 abstract description 16
- 239000003129 oil well Substances 0.000 abstract description 15
- 238000006073 displacement reaction Methods 0.000 abstract description 5
- 239000004576 sand Substances 0.000 abstract description 5
- 239000011229 interlayer Substances 0.000 abstract description 3
- 239000003921 oil Substances 0.000 description 88
- 238000000605 extraction Methods 0.000 description 6
- 238000004519 manufacturing process Methods 0.000 description 5
- 239000000295 fuel oil Substances 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 1
- 230000000712 assembly Effects 0.000 description 1
- 238000000429 assembly Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005465 channeling Effects 0.000 description 1
- 239000010779 crude oil Substances 0.000 description 1
- 238000011982 device technology Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
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Classifications
-
- 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
- E21B43/14—Obtaining from a multiple-zone well
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- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (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)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
A separately pumping and mixing out oil-submersible electric screw pump oil pumping device comprises a three-way joint, an upper oil pumping pipe, an upper screw pump, an upper connecting shaft assembly, an upper motor protector, an upper oil-submersible motor, a lower oil pumping joint, a packer, a lower screw pump, a lower connecting shaft assembly, a lower motor protector and a lower oil-submersible motor which are sequentially connected, wherein the lower end of a lower pump cable is connected with the lower oil-submersible motor, the lower end of the upper pump cable is connected with the upper oil-submersible motor, the lower end of the lower oil pumping pipe is connected with an eccentric oil outlet at the upper part of the lower oil pumping joint, the upper end of the lower oil pumping pipe is connected with an eccentric oil inlet at the lower part of the three-way joint, the components are assembled into a whole and connected into a lower part of the upper oil pumping pipe of a pump and a sleeve pipe, the packer is positioned between two oil layers to be pumped, the packer is expanded and then clung to the inner wall of the sleeve, the oil pump can separately pump on a small-displacement well, a thick oil well and a sand producing well with interlayer difference.
Description
Technical Field
The invention relates to an oil extraction device for an oil extraction well of an oil field, in particular to an oil pumping device of a separately pumping and mixing oil-submersible electric screw pump.
Background
At present, a plurality of oil layers are jetted on most oil wells, because the pressure and the water content of each oil layer are different, the oil layers interfere with each other during combined production, and the high-pressure layer laminates the low-pressure layer, so that the low-pressure layer can not play a role, even the problem that the high-pressure layer flows back to the low-pressure layer can occur, so that water channeling of the oil well is caused, and the production of the oil well is seriously influenced. The bottom of the Chinese patent application 210621085231.8 is a weighted oil well pump, the valve body is an eccentric structure, the diameter of the oil inlet valve ball is not limited by the pump diameter, the diameter of the oil inlet valve ball is increased, the oil inlet valve ball can work flexibly in a heavy oil well, the closing is immediate, the reliability of the oil well pump is improved, but the oil well pump is also limited by the diameter of a sleeve, and the space for increasing the diameter of the oil inlet valve ball is limited. The double-layer separate-production oil well pump is a sucker rod pump, the sucker rod and the oil pipe have relative contact motion, friction is inevitably generated between the sucker rod and the oil pipe, the problem that the sucker rod eccentrically wears the oil pipe occurs, the oil pipe and the sucker rod cannot be used after eccentric wear is generated, oil well operation is caused, the maintenance-free period of an oil well is short, the operation cost is increased, the consumption of the sucker rod pipe is increased, the production stop time of the oil well is long, and the yield of crude oil is reduced. According to these problems, the oil pumping device driven by the submersible motor is developed by the technicians, the device does not need a pumping rod, the problem of abrasion of the rod pipe does not exist, and the oil pumping device is widely concerned. But also has the following disadvantages: the submersible motor drives the centrifugal pump to pump oil, so that the centrifugal pump is suitable for a large-displacement oil production well, the pumping efficiency of the centrifugal pump in the oil well is very low, the centrifugal pump suitable for a small-displacement well is not available, the application range of the matching device is very small, and two layers of oil cannot be respectively exploited. Some researchers have developed a reciprocating oil pumping device driven by an oil submersible motor, such as chinese patent 2114211115830, which is a reciprocating oil pumping device driven by an oil submersible motor, and it is formed by organically combining a mature oil submersible motor, an oil well pump and a lifting screw, so that the rotary motion of the mature oil submersible motor is changed into reciprocating motion, but it cannot pump thick oil and well fluid with high sand content, and also cannot realize separate exploitation of two layers of oil.
Disclosure of Invention
The invention aims to design a separate pumping and mixed discharging submersible electric screw pump oil pumping device, which overcomes the problems in the prior art, can realize two-layer separate pumping, and can be used in small-displacement wells, heavy oil wells and wells with high sand content.
The purpose of the invention is realized as follows: comprises an upper oil pipe of a pump, a three-way joint, an upper oil pipe, an upper screw pump, an upper connecting shaft assembly, an upper motor protector, an upper submersible motor, a lower oil outlet joint, a packer, a lower screw pump, a lower connecting shaft assembly, a lower motor protector, a lower submersible motor, a sleeve, an upper pump cable, a lower oil pipe, a lower pump cable, an upper pump check valve, a lower pump check valve, a three-way joint, an upper oil pipe, an upper pump check valve, an upper screw pump, an upper connecting shaft assembly, an upper motor protector, an upper submersible motor, a lower oil outlet joint, a packer, a lower screw pump, a lower connecting shaft assembly, a lower motor protector and a lower submersible motor which are sequentially connected, wherein the lower end of the lower pump cable is connected with the lower submersible motor, the lower end of the upper pump cable is connected with the upper submersible motor, the lower end of the lower oil pipe is connected with an eccentric oil outlet at the upper part of the lower oil, the lower pump-out oil pipe is connected with a lower pump check valve, a three-way joint, an upper pump-out oil pipe, an upper pump check valve, an upper screw pump, an upper connecting shaft assembly, an upper motor protector, an upper submersible motor, a lower oil outlet joint, a packer, a lower screw pump, a lower connecting shaft assembly, a lower motor protector, a lower submersible motor, an upper pump cable, a lower pump-out oil pipe, a lower pump cable, an upper pump check valve and a lower pump check valve, the lower pump-out oil pipe, the upper submersible motor, the lower pump-out oil pipe, the packer, the upper pump-out oil pipe, the lower pump-out oil pipe, the upper pump check valve, the upper pump-out oil pipe, the upper pump check valve, the lower pump-out oil pipe, the upper pump cable and the lower pump-out oil pipe, well fluid produced by the lower screw pump can only flow upwards from the lower pump check valve, well fluid produced by the upper screw pump can only flow upwards from the upper pump check valve, and well fluid flowing through the upper pump check valve and the lower pump check valve from bottom to top cannot flow downwards through the upper pump check valve and the lower pump check valve.
The telescopic pipe is arranged on the lower pump oil outlet pipe, so that two ends of the lower pump oil outlet pipe are conveniently connected with the three-way joint and the lower oil outlet joint in place.
And the lower part of the lower submersible motor is provided with a pipe column anchor.
A lower centralizer is arranged between the lower connecting shaft assembly and the lower motor protector, and an upper centralizer is arranged at the upper part of the lower screw pump.
The invention has the beneficial effects that: the invention is formed by combining a mature oil-submersible motor, a screw pump and a mature matched tool machine, can adopt the screw pump to carry out layered oil extraction on stratums with interlayer difference, can carry out oil extraction on thick oil wells and sand producing wells with interlayer difference, overcomes the problems of the prior layered oil extraction device technology, can realize two-layer separate oil extraction, can be used on small-displacement wells, thick oil wells and wells with high sand content, and has remarkable economic benefit.
Drawings
FIG. 1 is an assembly drawing of an embodiment of the present invention.
Detailed Description
An embodiment of the present invention will be described below with reference to fig. 1.
The embodiment of the invention comprises an upper oil pipe 1 of a pump, a three-way joint 2, an upper oil pipe 3 of a pump, an upper screw pump 4, an upper connecting shaft assembly 5, an upper motor protector 6, an upper submersible motor 7, a lower oil outlet joint 8, a packer 9, a lower screw pump 11, a lower connecting shaft assembly 12, a lower motor protector 14, a lower submersible motor 15, a sleeve 17, an upper pump cable 18, a lower oil pipe 20 of the pump, a lower pump cable 21, an upper pump check valve 22, a lower pump check valve 23, the three-way joint 2, the upper oil pipe 3, the upper pump check valve 22, the upper screw pump 4, the upper connecting shaft assembly 5, the upper motor protector 6, the upper submersible motor 7, the lower oil outlet joint 8, the packer 9, the lower screw pump 11, the lower connecting shaft assembly 12, the lower motor protector 14 and the lower submersible motor 15 which are connected in sequence, the lower end of the lower pump cable 21 is connected with the lower motor 15, the lower end of the upper pump cable 18 is connected with the upper submersible motor 7, the lower end of a lower pump-out oil pipe 20 is connected with an eccentric oil outlet at the upper part of a lower oil outlet joint 8, the upper end of the lower pump-out oil pipe 20 is connected with an eccentric oil inlet at the lower part of a three-way joint 2, a lower pump check valve 23 is connected on the lower pump-out oil pipe 20, the three-way joint 2, the upper pump-out oil pipe 3, an upper pump check valve 22, an upper screw pump 4, an upper connecting shaft assembly 5, an upper motor protector 6, an upper submersible motor 7, a lower oil outlet joint 8, a packer 9, a lower screw pump 11, a lower connecting shaft assembly 12, a lower motor protector 14, a lower submersible motor 15, an upper pump cable 18, a lower pump-out oil pipe 20, a lower pump cable 21, the upper pump check valve 22 and the lower pump check valve 23 are assembled into a whole and then are connected to the lower part of an upper pump oil pipe 1 and then put into a casing 17, the packer 9 is positioned between two oil layers to be, well fluid pumped by the lower screw pump 11 is discharged to the three-way joint 2 through the lower pump oil outlet pipe 20 and the lower pump check valve 23, well fluid pumped by the upper screw pump 4 is discharged to the three-way joint 2 through the upper pump oil outlet pipe 3 and the upper pump check valve 22, the upper pump cable 18 and the lower pump cable 21 are attached to the outside of the pump oil outlet pipe 1, the well fluid pumped by the lower screw pump 11 can only flow upwards from the lower pump check valve 23, the well fluid pumped by the upper screw pump 4 can only flow upwards from the upper pump check valve 22, and the well fluid flowing through the upper pump check valve 22 and the lower pump check valve 23 from bottom to top cannot flow downwards through the upper pump check valve 22 and the lower pump check valve 23. The upper ends of the upper pump cable 18 and the lower pump cable 21 are connected with a ground power supply system.
The invention has the further measure that the telescopic pipe 19 is arranged on the lower pump-out oil pipe 20, so that the two ends of the lower pump-out oil pipe 20 are conveniently connected with the three-way joint 2 and the lower oil outlet joint 8 in place. The connecting screw threads of the two ends of the lower pump-out oil pipe 20, the three-way joint 2 and the lower oil outlet joint 8 are oil pipe screw threads.
A further measure of the invention is that the lower part of the submersible motor 15 is fitted with a string anchor 16. The screw pump is prevented from loosening and falling down.
The invention has the further measure that a lower centralizer 13 is arranged between the lower connecting shaft assembly 12 and the lower motor protector 14, and an upper centralizer 10 is arranged at the upper part of the lower screw pump 11. The tools above and below the centralizer are positioned in the middle of the casing 17, and the normal work of each tool is ensured.
The two connecting shaft assemblies are flexible shafts, and can automatically eliminate offset motion generated by eccentric operation of the screw pump.
The well fluid pumped by the lower screw pump 11 is discharged to the three-way joint 2 through the lower pump oil outlet pipe 20 and the lower pump check valve 23, then is mixed with the well fluid pumped by the upper screw pump 4 and discharged to the three-way joint 2 through the upper pump oil outlet pipe 3 and the upper pump check valve 22, and is pumped to the top of the well mouth through the upper pump oil outlet pipe 3, so that two layers of well fluid are separately pumped and mixed.
Claims (4)
1. The utility model provides a divide pump to mix and go out oily electric screw pump oil jack of diving, including oil pipe (1) on the pump, three way connection (2), go up oil pipe (3) of pumping, go up screw pump (4), go up connecting axle assembly (5), go up motor protector (6), go up oily motor (7) of diving, lower part oil pipe (8), packer (9), lower screw pump (11), connecting axle assembly (12) down, motor protector (14) down, oily motor (15) of diving down, sleeve pipe (17), go up pump cable (18), pump oil pipe (20) down, pump cable (21) down, go up pump check valve (22), pump check valve (23) down, characterized by: the oil pump comprises a three-way joint (2), an upper oil pumping-out pipe (3), an upper pump check valve (22), an upper screw pump (4), an upper connecting shaft assembly (5), an upper motor protector (6), an upper submersible motor (7), a lower oil outlet joint (8), a packer (9), a lower screw pump (11), a lower connecting shaft assembly (12), a lower motor protector (14) and a lower submersible motor (15) which are sequentially connected, wherein the lower end of a lower pump cable (21) is connected into the lower submersible motor (15), the lower end of an upper pump cable (18) is connected into the upper submersible motor (7), the lower end of a lower oil pumping-out pipe (20) is connected with an eccentric oil outlet in the upper part of the lower oil outlet joint (8), the upper end of the lower oil pumping-out pipe (20) is connected with an eccentric oil inlet in the lower part of the three-way joint (2), the lower oil pumping-out pipe (20) is connected with a lower check valve, An upper pump check valve (22), an upper screw pump (4), an upper connecting shaft assembly (5), an upper motor protector (6), an upper submersible motor (7), a lower oil outlet joint (8), a packer (9), a lower screw pump (11), a lower connecting shaft assembly (12), a lower motor protector (14), a lower submersible motor (15), an upper pump cable (18), a lower pump oil outlet pipe (20), a lower pump cable (21), an upper pump check valve (22) and a lower pump check valve (23) are assembled into a whole and then connected to the lower part of the upper pump oil pipe (1) and put into a casing (17), the packer (9) is positioned between two oil layers to be pumped, the packer (9) is expanded and then clings to the inner wall of the casing (17) to separate the two oil layers to be pumped, well fluid pumped by the lower screw pump (11) is discharged to a three-way joint (2) through the lower pump oil outlet pipe (20) and the lower pump check valve (23), well fluid pumped by the upper screw pump (4) is discharged to the three-way joint (2) through the upper pump oil pumping pipe (3) and the upper pump check valve (22), an upper pump cable (18) and a lower pump cable (21) are attached to the outside of the pump oil pumping pipe (1), the well fluid pumped by the lower screw pump (11) can only flow upwards from the lower pump check valve (23), the well fluid pumped by the upper screw pump (4) can only flow upwards from the upper pump check valve (22), and the well fluid flowing upwards from bottom through the upper pump check valve (22) and the lower pump check valve (23) can not flow downwards through the upper pump check valve (22) and the lower pump check valve (23).
2. The oil pumping device of the separately pumping and mixing oil-submersible electric screw pump according to claim 1, which is characterized in that: an extension pipe (19) is arranged on the lower pump-out oil pipe (20), so that two ends of the lower pump-out oil pipe (20) are conveniently connected with the three-way joint (2) and the lower oil outlet joint (8) in place.
3. The oil pumping device of the separately pumping and mixing submersible electric screw pump according to claim 1 or 2, which is characterized in that: and a pipe string anchor (16) is arranged at the lower part of the lower submersible motor (15).
4. The oil pumping device of the separately pumping and mixing oil-submersible electric screw pump according to claim 3, which is characterized in that: a lower centralizer (13) is arranged between the lower connecting shaft assembly (12) and the lower motor protector (14), and an upper centralizer (10) is arranged on the upper part of the lower screw pump (11).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010285101.3A CN111206908A (en) | 2020-04-13 | 2020-04-13 | Oil pumping device of electric screw pump capable of separately pumping and mixing out oil submersible oil |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010285101.3A CN111206908A (en) | 2020-04-13 | 2020-04-13 | Oil pumping device of electric screw pump capable of separately pumping and mixing out oil submersible oil |
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| Publication Number | Publication Date |
|---|---|
| CN111206908A true CN111206908A (en) | 2020-05-29 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010285101.3A Pending CN111206908A (en) | 2020-04-13 | 2020-04-13 | Oil pumping device of electric screw pump capable of separately pumping and mixing out oil submersible oil |
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| CN (1) | CN111206908A (en) |
Citations (13)
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|---|---|---|---|---|
| US6079491A (en) * | 1997-08-22 | 2000-06-27 | Texaco Inc. | Dual injection and lifting system using a rod driven progressive cavity pump and an electrical submersible progressive cavity pump |
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2020
- 2020-04-13 CN CN202010285101.3A patent/CN111206908A/en active Pending
Patent Citations (13)
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Effective date of registration: 20231009 Address after: 100728 No. 22 North Main Street, Chaoyang District, Beijing, Chaoyangmen Applicant after: CHINA PETROLEUM & CHEMICAL Corp. Address before: Room 502, unit 2, building 24, 41 Xingrong West Street, Dongying District, Dongying City, Shandong Province 257000 Applicant before: Feng Xinyong |