CN112377405A - Oil-submersible screw pump - Google Patents
Oil-submersible screw pump Download PDFInfo
- Publication number
- CN112377405A CN112377405A CN202011199440.6A CN202011199440A CN112377405A CN 112377405 A CN112377405 A CN 112377405A CN 202011199440 A CN202011199440 A CN 202011199440A CN 112377405 A CN112377405 A CN 112377405A
- Authority
- CN
- China
- Prior art keywords
- screw
- shell
- stator
- submersible
- bendable
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 239000003638 chemical reducing agent Substances 0.000 claims abstract description 28
- 230000001012 protector Effects 0.000 claims abstract description 19
- 230000008878 coupling Effects 0.000 claims abstract description 16
- 238000010168 coupling process Methods 0.000 claims abstract description 16
- 238000005859 coupling reaction Methods 0.000 claims abstract description 16
- 230000005540 biological transmission Effects 0.000 claims description 5
- 239000002775 capsule Substances 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 abstract description 12
- 238000000034 method Methods 0.000 abstract description 5
- 238000009434 installation Methods 0.000 abstract description 4
- 238000005452 bending Methods 0.000 description 5
- 239000003921 oil Substances 0.000 description 3
- 239000003129 oil well Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 239000000295 fuel oil Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Images
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C2/00—Rotary-piston machines or pumps
- F04C2/08—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing
- F04C2/10—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of internal-axis type with the outer member having more teeth or tooth-equivalents, e.g. rollers, than the inner member
- F04C2/107—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of internal-axis type with the outer member having more teeth or tooth-equivalents, e.g. rollers, than the inner member with helical teeth
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C11/00—Combinations of two or more machines or pumps, each being of rotary-piston or oscillating-piston type; Pumping installations
- F04C11/001—Combinations of two or more machines or pumps, each being of rotary-piston or oscillating-piston type; Pumping installations of similar working principle
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C11/00—Combinations of two or more machines or pumps, each being of rotary-piston or oscillating-piston type; Pumping installations
- F04C11/008—Enclosed motor pump units
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C15/00—Component parts, details or accessories of machines, pumps or pumping installations, not provided for in groups F04C2/00 - F04C14/00
- F04C15/0057—Driving elements, brakes, couplings, transmission specially adapted for machines or pumps
- F04C15/0061—Means for transmitting movement from the prime mover to driven parts of the pump, e.g. clutches, couplings, transmissions
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
The invention relates to the technical field of submersible screw pumps, in particular to a submersible screw pump, which comprises a lower shell and a reducer shell, wherein a motor and a protector are arranged in the lower shell; a first screw stator is arranged in the second-stage screw shell body, a first screw rotor is arranged in the first screw stator in a matched mode, the first screw stator is connected with an output shaft of the speed reducer through a universal coupling, and the universal coupling is located in the bendable shell body. The submersible screw pump can be used in a curved production casing, so that a large enough annular space size is formed between the electric submersible screw pump body system and the curved production casing, and the failure of a motor leading cable at a speed reducer in the process of downhole installation is avoided.
Description
Technical Field
The invention relates to the technical field of submersible screw pumps, in particular to a submersible screw pump.
Background
The electric oil-submersible screw pump is a new type mechanical oil production system. The system not only exerts the unique advantages that the ground driving screw pump body can be used for a heavy oil well which can not be extracted by a rod pump and an electric submersible pump, a sand-containing well, a low-yield oil well and a middle and later stage water-driven oil well, but also absorbs the advantages that the electric submersible pump does not use a sucker rod, adopts the submersible motor to directly drive the screw pump body underground, and is novel oil extraction equipment.
In the electric submersible screw pump oil production system, the submersible speed reducer has large output torque, low rotating speed and high input rotating speed, and the screw pump body is arranged in the sleeve, so that the radial size which can be accommodated in the inner cavity of the sleeve is limited, and the speed reducer with large transmission ratio, small size and large torque is required to be adopted.
The invention patent with the publication number of CN101162018A provides a speed reducer-free submersible screw pump: the DC brushless torque motor is arranged at the bottom end of the underground equipment, the output shaft is vertically upward, the output shaft is connected with the coupling through the protector and then connected with the lower end of the rotor of the screw pump through the shaft of the coupling, and the whole connection process is from bottom to top. When the direct current brushless torque motor works, the direct current brushless torque motor provides power with low rotating speed and large torque, the middle part of the direct current brushless torque motor is not provided with a speed reducing device, and an output shaft of the motor directly drives a rotor of the screw pump through a coupling. The submersible screw pump can only be used in a vertical production casing pipe, the production casing pipe is slightly bent, and the size of an annular space between the electric submersible screw pump body system and the production casing pipe is too small, so that a motor leading cable fails at a speed reducer in the process of installation in a well.
Disclosure of Invention
The invention aims to provide a submersible screw pump which can be suitable for a curved production casing.
The above object of the present invention is achieved by the following technical solutions:
an oil-submersible screw pump comprises a lower shell and a speed reducer shell, wherein a motor and a protector are arranged in the lower shell, a speed reducer is arranged in the speed reducer shell, an output shaft of the motor is connected with the protector, an output shaft of the protector is connected with the speed reducer, and one end, far away from the lower shell, of the speed reducer shell is sequentially connected with a bendable shell, a secondary screw shell and a primary screw shell; a first screw stator is arranged in the second-stage screw shell, a first screw rotor is arranged in the first screw stator in a matching manner, the first screw stator is connected with an output shaft of the speed reducer through a universal coupling, and the universal coupling is positioned in the bendable shell; a second screw stator is arranged in the first-stage screw shell body, a second screw rotor is arranged in the second screw stator in a matched mode, and the second screw rotor is hinged to the first screw rotor.
Furthermore, the bendable shell comprises two sections of fixing portions, the two sections of fixing portions are respectively connected with the speed reducer shell and the first-level screw rod shell, the two sections of fixing portions are connected through a bending portion, the bending portion comprises an inner corrugated pipe, an outer corrugated pipe and a plurality of chains, the two ends of the inner corrugated pipe, the two ends of the outer corrugated pipe and the two ends of all the chains are respectively connected with the two sections of fixing portions, all the chains are mutually parallel after being straightened, the inner corrugated pipe is located in the bendable shell, the outer corrugated pipe is located outside the bendable shell, and all the chains are located between the inner corrugated pipe and the outer corrugated pipe.
Further, the universal coupling comprises a universal joint transmission shaft and double offset type constant velocity universal joints, the double offset type constant velocity universal joints are connected to two ends of the universal joint transmission shaft, and the two double offset type constant velocity universal joints are respectively connected with an output shaft of the speed reducer and the first screw rotor.
Furthermore, the hinge structure between the second screw rotor and the first screw rotor comprises a fork joint, two ends of the fork joint are both pivoted with half couplers, the two half couplers are respectively connected with the first screw rotor and the second screw rotor, and the pivoting directions of the two half couplers are the same.
Furthermore, a first positioning ring is arranged in the outer shell of the secondary screw rod, and two ends of the first positioning ring are respectively pressed by the bendable shell and the first screw rod stator; and a second positioning ring is arranged in the first-stage screw rod outer shell, and two ends of the second positioning ring are respectively compressed by the second-stage screw rod outer shell and the second screw rod stator.
Further, the motor is a combined permanent magnet motor.
Further, the protector is a capsule type protector.
In conclusion, the invention has the following beneficial effects:
the submersible screw pump can be used in a curved production casing, so that a large enough annular space size is formed between the electric submersible screw pump body system and the curved production casing, and the failure of a motor leading cable at a speed reducer in the process of downhole installation is avoided.
Drawings
Fig. 1 is a front half-sectional axial view of a submersible screw pump according to the present application;
fig. 2 is a rear half-section axial half-sectional view of a submersible screw pump according to the present application;
fig. 3 is an enlarged view of a in fig. 1.
Reference numerals: 1. a system bottom cover; 2. a lower housing; 3. a motor; 4. an output shaft of the motor; 5. a protector; 6. a protector output shaft; 7. a spline housing; 8. a reducer casing; 9. a speed reducer; 10. a short section; 11. a bendable housing; 12. a fixed part; 13. a bending section; 14. a chain; 15. an inner bellows; 16. an outer bellows; 17. a universal coupling; 18. a universal joint drive shaft; 19. a double offset constant velocity joint; 20. a first positioning ring; 21. a secondary screw outer shell; 22. a first screw stator; 23. a first screw rotor; 24. a half coupling; 25. a pin; 26. a fork joint; 27. a first-stage screw outer shell; 28. a second screw stator; 29. a second screw rotor; 30. the anti-drop connecting rod; 31. a drop-proof cap; 32. an upper housing joint; 33. a second retaining ring.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
A submersible screw pump is shown in figures 1 and 2 and comprises a system bottom cover, a lower shell, a reducer outer shell, a bendable shell, a secondary screw outer shell, a primary screw outer shell and an upper shell joint which are sequentially connected.
As shown in fig. 1, a motor, a protector and a spline housing are arranged in the lower shell, the motor is a combined permanent magnet motor, the protector is a capsule type protector, the output shaft of the motor is connected with the protector, and the output shaft of the protector is connected with the spline housing. The speed reducer is arranged in the speed reducer shell, the input shaft of the speed reducer is connected with the spline housing, and the output shaft of the speed reducer is connected with the short section.
As shown in fig. 1, the bendable casing includes two fixing portions, the two fixing portions are respectively connected to the outer casing of the reducer and the outer casing of the second-stage screw, and the two fixing portions are connected by a bending portion.
Referring to fig. 1 and 3, the bending portion includes an inner bellows, an outer bellows and a plurality of chains equidistantly arranged around the circumference of the bendable housing, and two ends of the inner bellows, the outer bellows and all the chains are respectively connected to two fixing portions. All chains are parallel to each other after being straightened, the inner corrugated pipe is positioned in the bendable shell, the outer corrugated pipe is positioned outside the bendable shell, and all chains are positioned between the inner corrugated pipe and the outer corrugated pipe.
As shown in fig. 1, a universal joint is provided in the bendable housing, and the universal joint includes a joint drive shaft and a double offset constant velocity universal joint connected to both ends of the joint drive shaft. One double-offset constant-velocity universal joint is connected with an output shaft of the speed reducer through a short section, and the other double-offset constant-velocity universal joint is connected with a first screw rotor in the second-stage screw outer shell.
As shown in fig. 2, besides the first screw rotor, a first screw stator is further disposed in the second-stage screw outer shell, and the first screw rotor is disposed in the first screw stator in a matching manner. Similarly, a second screw stator is arranged in the first-stage screw outer shell, and a second screw rotor is arranged in the second screw stator in a matching mode.
As shown in fig. 2, the first screw rotor is hinged to the second screw rotor, the hinge structure includes a fork joint, two ends of the fork joint are both pivoted with half-couplers through pins 25, the two half-couplers are respectively connected with the first screw rotor and the second screw rotor, and the pivoting directions of the two half-couplers are the same.
As shown in fig. 1, a first positioning ring is arranged in the outer shell of the secondary screw, and two ends of the first positioning ring are respectively compressed by the bendable shell and the first screw stator.
As shown in fig. 2, a second positioning ring is arranged in the first-stage screw outer shell, and two ends of the second positioning ring are respectively compressed by the second-stage screw outer shell and the second screw stator.
As shown in fig. 2, the end of the second screw rotor facing the upper housing joint 32 is connected to an anti-drop connecting rod, an anti-drop cap is screwed on the anti-drop connecting rod, and the diameter of the hole in which the anti-drop connecting rod is located is smaller than that of the anti-drop cap.
Due to the bendable structure of the bendable shell 11, the submersible screw pump can be used in a bent production casing, so that a large enough annular space size is formed between the electric submersible screw pump body system and the bent production casing, and the failure of a motor lead cable at a speed reducer in the process of downhole installation is avoided.
The present embodiment is only for explaining the present invention, and it is not limited to the present invention, and those skilled in the art can make modifications of the present embodiment without inventive contribution as needed after reading the present specification, but all of them are protected by patent law within the scope of the claims of the present invention.
Claims (7)
1. The utility model provides a latent oil screw pump, includes casing (2) and reduction gear (9) casing down, sets up motor (3) and protector (5) in casing (2) down, sets up reduction gear (9) in reduction gear (9) casing, output shaft protector (5) of motor (3), output shaft reduction gear (9) of protector (5), its characterized in that: one end of the shell of the speed reducer (9) far away from the lower shell (2) is sequentially connected with a bendable shell (11), a secondary screw outer shell (21) and a primary screw outer shell (27); a first screw stator (22) is arranged in the secondary screw outer shell (21), a first screw rotor (23) is arranged in the first screw stator (22) in a matching manner, the first screw stator (22) is connected with an output shaft of the speed reducer (9) through a universal coupling (17), and the universal coupling (17) is positioned in the bendable shell (11); a second screw stator (28) is arranged in the first-stage screw outer shell (27), a second screw rotor (29) is arranged in the second screw stator (28) in a matched mode, and the second screw rotor (29) is hinged with the first screw rotor (23).
2. The submersible screw pump of claim 1, wherein: bendable casing (11) includes two sections fixed part (12), two sections fixed part (12) are connected with reduction gear shell body (8), one-level screw rod shell body (27) respectively, two sections fixed part (12) are connected through flexion (13), flexion (13) are including interior bellows (15), outer bellows (16) and a plurality of chain (14), two sections fixed part (12) are connected respectively to the both ends of interior bellows (15), outer bellows (16) and all chain (14), all chain (14) are parallel to each other after flare-outing, interior bellows (15) are located bendable casing (11), outer bellows (16) are located bendable casing (11) outward, all chain (14) are located between interior bellows (15) and outer bellows (16).
3. The submersible screw pump of claim 1, wherein: the universal coupling (17) comprises a universal joint transmission shaft (18) and double offset type constant velocity universal joints (19), wherein the double offset type constant velocity universal joints (19) are connected to two ends of the universal joint transmission shaft (18), and the two double offset type constant velocity universal joints (19) are respectively connected with an output shaft of the speed reducer (9) and the first screw rotor (23).
4. The submersible screw pump of claim 1, wherein: the hinge structure between the second screw rotor (29) and the first screw rotor (23) comprises a fork joint (26), two ends of the fork joint (26) are respectively pivoted with a half coupling (24), the two half couplings (24) are respectively connected with the first screw rotor (23) and the second screw rotor (29), and the pivoting directions of the two half couplings (24) are the same.
5. The submersible screw pump of claim 1, wherein: a first positioning ring (20) is arranged in the secondary screw outer shell (21), and two ends of the first positioning ring (20) are respectively pressed by the bendable shell (11) and the first screw stator (22); a second positioning ring (33) is arranged in the first-stage screw rod outer shell (27), and two ends of the second positioning ring (33) are respectively compressed by the second-stage screw rod outer shell (21) and the second screw rod stator (28).
6. The submersible screw pump of claim 1, wherein: the motor (3) is a combined permanent magnet motor.
7. The submersible screw pump of claim 1, wherein: the protector (5) is a capsule type protector.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011199440.6A CN112377405A (en) | 2020-11-01 | 2020-11-01 | Oil-submersible screw pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011199440.6A CN112377405A (en) | 2020-11-01 | 2020-11-01 | Oil-submersible screw pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112377405A true CN112377405A (en) | 2021-02-19 |
Family
ID=74576537
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011199440.6A Pending CN112377405A (en) | 2020-11-01 | 2020-11-01 | Oil-submersible screw pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112377405A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113623200A (en) * | 2021-09-13 | 2021-11-09 | 江苏丰泰流体机械科技有限公司 | Synchronous rotary multiphase multistage submersible mixed transportation pump |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4580955A (en) * | 1983-12-14 | 1986-04-08 | Joh. Heinrich Bornemann Gmbh & Co. Kg | Eccentric screw pump for the conveying of liquids from bore holes |
| CN105358832A (en) * | 2013-05-23 | 2016-02-24 | 赫斯基石油运营有限公司 | Progressive cavity pump and method for operating same in boreholes |
| CN105422661A (en) * | 2015-12-04 | 2016-03-23 | 镇江市润州联轴器厂 | Cross shaft type universal coupling |
| CN106224233A (en) * | 2016-09-26 | 2016-12-14 | 西南石油大学 | Bendable novel submersible screw pump |
-
2020
- 2020-11-01 CN CN202011199440.6A patent/CN112377405A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4580955A (en) * | 1983-12-14 | 1986-04-08 | Joh. Heinrich Bornemann Gmbh & Co. Kg | Eccentric screw pump for the conveying of liquids from bore holes |
| CN105358832A (en) * | 2013-05-23 | 2016-02-24 | 赫斯基石油运营有限公司 | Progressive cavity pump and method for operating same in boreholes |
| CN105422661A (en) * | 2015-12-04 | 2016-03-23 | 镇江市润州联轴器厂 | Cross shaft type universal coupling |
| CN106224233A (en) * | 2016-09-26 | 2016-12-14 | 西南石油大学 | Bendable novel submersible screw pump |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113623200A (en) * | 2021-09-13 | 2021-11-09 | 江苏丰泰流体机械科技有限公司 | Synchronous rotary multiphase multistage submersible mixed transportation pump |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20210219 |
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| RJ01 | Rejection of invention patent application after publication |