CN111720098A - Novel oil of diving directly drives lifting device - Google Patents
Novel oil of diving directly drives lifting device Download PDFInfo
- Publication number
- CN111720098A CN111720098A CN201910211868.9A CN201910211868A CN111720098A CN 111720098 A CN111720098 A CN 111720098A CN 201910211868 A CN201910211868 A CN 201910211868A CN 111720098 A CN111720098 A CN 111720098A
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- China
- Prior art keywords
- socket
- cable
- short section
- wet joint
- lifting device
- 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.)
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Links
- 230000009189 diving Effects 0.000 title description 2
- 210000002445 nipple Anatomy 0.000 claims abstract description 18
- 239000007788 liquid Substances 0.000 claims abstract description 7
- 239000003129 oil well Substances 0.000 claims description 3
- 239000004020 conductor Substances 0.000 claims description 2
- 230000005611 electricity Effects 0.000 claims description 2
- 238000010276 construction Methods 0.000 abstract description 8
- 239000003921 oil Substances 0.000 description 38
- 238000000034 method Methods 0.000 description 8
- 238000010586 diagram Methods 0.000 description 5
- 239000012530 fluid Substances 0.000 description 4
- 230000001012 protector Effects 0.000 description 4
- 230000007547 defect Effects 0.000 description 2
- 238000000605 extraction Methods 0.000 description 2
- 238000002955 isolation Methods 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 239000010779 crude oil Substances 0.000 description 1
- 239000012212 insulator Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
Images
Classifications
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- 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
- E21B43/12—Methods or apparatus for controlling the flow of the obtained fluid to or in wells
- E21B43/121—Lifting well fluids
- E21B43/128—Adaptation of pump systems with down-hole electric drives
-
- 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
- E21B17/00—Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Cables; Casings; Tubings
- E21B17/02—Couplings; joints
- E21B17/023—Arrangements for connecting cables or wirelines to downhole devices
Landscapes
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (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)
- Mechanical Engineering (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
The invention provides a novel submersible direct-drive lifting device, which comprises: the device comprises a sleeve, an oil pipe, a screw pump, a motor, a cable balancing weight, a wet joint, a socket short section and a check valve; the wet joint includes: a wet end fitting body, a first connecting ring, and a first locating ring; the socket nipple includes: the socket short section comprises a socket short section main body, a guide unit, a second connecting ring and a second positioning ring; the cable is electrically connected with the top end of the wet joint through a cable balancing weight; the bottom end of the cable balancing weight is fixedly connected with the top end of the wet joint; the bottom end of the wet joint is electrically connected with the socket short section after being spliced by the guide unit; the bottom end of the socket short section is fixed at the top end of the screw pump; the check valve is arranged on the side wall of the socket short section main body close to the top end of the screw pump, arranged between the socket short section main body and the oil pipe and used for guiding out liquid in the socket short section main body. The invention has the advantages of reducing cost, simplifying construction flow, reducing operation time and construction risk and improving operation efficiency.
Description
Technical Field
The invention relates to the technical field of oil extraction machinery, in particular to a novel submersible direct-drive lifting device.
Background
In the oil field crude oil exploitation lifting device in the prior art, an oil-submersible direct-drive screw pump is used for lifting an inclined well and a horizontal well, a cable connected with the oil-submersible screw pump is arranged in an annular space between an oil pipe and a sleeve, and a cable clamp is used for fixing the cable to the outer wall of the oil pipe. In order to prevent the oil pipe and the cable from colliding and rubbing in the process of descending, a cable shield needs to be arranged at the oil pipe coupling. Therefore, the construction operation process is complex and the operation time is long in the prior art.
Therefore, how to reduce the cost, simplify the operation process and improve the operation efficiency is a technical problem to be solved.
Disclosure of Invention
In order to solve the defects in the prior art, the invention provides the novel submersible direct-drive lifting device, the cable is placed in the oil pipe, and the underground cable is in wet connection through the wet joint, so that the submersible direct-drive lifting device has the beneficial effects of reducing the cost, simplifying the construction process, reducing the operation time and the construction risk and improving the operation efficiency.
In order to achieve the above object, the present invention provides a novel submersible direct-drive lifting device, comprising: the sleeve pipe, set up in oil pipe in the sleeve pipe, with oil pipe bottom fixed connection's screw pump and with the motor that the bottom fixed electricity of screw pump is connected, novel dive oil directly drive lifting devices still includes: the cable, the cable counterweight block, the wet joint, the socket short section and the check valve are arranged in the oil pipe; the wet joint includes: the wet joint comprises a wet joint body, a first connecting ring and a first positioning ring, wherein the first connecting ring and the first positioning ring are arranged on the side wall of the wet joint body; the socket sub comprises: the socket short section comprises a hollow socket short section main body, a guide unit fixed at the top end of the socket short section main body, a second connecting ring and a second positioning ring, wherein the second connecting ring and the second positioning ring are arranged on the side wall of the socket short section main body;
one end of the cable is electrically connected with the top end of the wet joint through the cable balancing weight;
the bottom end of the cable balancing weight is fixedly connected with the top end of the wet joint;
the bottom end of the wet joint is electrically connected with the socket short section after being spliced through the guide unit, so that the first connecting ring is correspondingly contacted with the second connecting ring, and the first positioning ring is clamped with the second positioning ring;
the bottom end of the socket short section is fixed at the top end of the screw pump;
the check valve is arranged on the side wall of the socket short section main body close to the top end of the screw pump, is arranged between the socket short section main body and the oil pipe and is used for guiding out liquid in the socket short section main body.
In an embodiment, the number of the first connection rings is the same as that of the second connection rings.
In one embodiment, the wet joint further comprises: and the first insulating rings are arranged between the first connecting rings.
In one embodiment, the receptacle sub further comprises: and a plurality of second insulating rings disposed between the second connection rings.
In one embodiment, the novel submersible direct-drive lifting device further comprises: a control unit disposed outside the oil well; the control unit is electrically connected with the other end of the cable.
In one embodiment, the cable is a cylindrical cable.
In one embodiment, the receptacle sub further comprises: and the flat cable socket is arranged outside the side wall of the socket short section main body.
In one embodiment, the novel submersible direct-drive lifting device further comprises: a flat cable; one end of the flat cable is electrically connected with the flat cable socket, and the other end of the flat cable is electrically connected with the motor.
In one embodiment, the cable weight is a conductive body.
In one embodiment, the wet joint is a male joint, and the socket nipple is a female joint corresponding to the male joint.
The invention provides a novel submersible direct-drive lifting device, which comprises: the device comprises a sleeve, an oil pipe arranged in the sleeve, a screw pump fixedly connected with the bottom end of the oil pipe, a motor fixedly and electrically connected with the bottom end of the screw pump, and a cable, a cable balancing weight, a wet joint, a socket short section and a check valve which are arranged in the oil pipe; the wet joint includes: the wet joint comprises a wet joint body, a first connecting ring and a first positioning ring, wherein the first connecting ring and the first positioning ring are arranged on the side wall of the wet joint body; the socket sub comprises: the socket short section comprises a hollow socket short section main body, a guide unit fixed at the top end of the socket short section main body, a second connecting ring and a second positioning ring, wherein the second connecting ring and the second positioning ring are arranged on the side wall of the socket short section main body; one end of the cable is electrically connected with the top end of the wet joint through the cable balancing weight; the bottom end of the cable balancing weight is fixedly connected with the top end of the wet joint; the bottom end of the wet joint is electrically connected with the socket short section after being spliced through the guide unit, so that the first connecting ring is correspondingly contacted with the second connecting ring, and the first positioning ring is clamped with the second positioning ring; the bottom end of the socket short section is fixed at the top end of the screw pump; the check valve is arranged on the side wall of the socket short section main body close to the top end of the screw pump, is arranged between the socket short section main body and the oil pipe and is used for guiding out liquid in the socket short section main body. The invention has the advantages of reducing cost, simplifying construction flow, reducing operation time and construction risk and improving operation efficiency.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a novel submersible direct-drive lifting device provided by the present application;
FIG. 2 is a schematic structural diagram of a wet end connector and a socket short joint connector in an embodiment of the present application;
fig. 3 is a schematic structural diagram of the novel submersible direct-drive lifting device in an embodiment of the present application;
FIG. 4 is a schematic structural diagram of a jack sub in an embodiment of the present application;
figure 5 is a top view of a jack sub in an embodiment of the present application.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
As used herein, the terms "first," "second," … …, etc. do not denote any order or order, nor are they used to limit the invention, but rather are used to distinguish one element from another element or operation described by the same technical terms.
As used herein, the terms "comprising," "including," "having," "containing," and the like are open-ended terms that mean including, but not limited to.
As used herein, "and/or" includes any and all combinations of the described items.
Aiming at the defects in the prior art, the invention provides a novel submersible direct-drive lifting device. Fig. 1 is a schematic structural diagram of a novel submersible direct-drive lifting device according to an embodiment of the present application, and as shown in fig. 1, the device includes: the device comprises a sleeve 1, an oil pipe 2, a screw pump 3, a motor 4, a cable 5, a cable balancing weight 6, a wet joint 7, a socket short section 8 and a check valve 9. Wherein, wet joint 7 includes: a wet end fitting body 701, a first connecting ring 702, and a first positioning ring 703. The socket sub 8 includes: a socket sub body 801, a guiding unit 802, a second connecting ring 803 and a second positioning ring 804.
As shown in fig. 1, the oil pipe 2, the screw pump 3 and the motor 4 are sequentially disposed in the casing 1 from top to bottom along the Y-axis direction. The top end 3A of the screw pump 3 is fixedly connected with the bottom end 2B of the oil pipe 2, and the bottom end 3B of the screw pump 3 is fixedly connected with the top end 4A of the motor 4. The upper end of the motor 4 is provided with a motor protector (not shown in the figure), the upper end of the motor protector is provided with a flexible shaft (not shown in the figure) which provides concentric rotation and eccentric rotation, and the upper end of the flexible shaft is provided with the screw pump 3. The four parts are connected by the housing and are connected by the shaft.
As shown in fig. 1, from top to bottom along the Y-axis direction, the cable 5, the cable weight 6, the wet joint 7, and the socket nipple 8 are sequentially disposed in the oil pipe 2, wherein the oil pipe 2 is a hollow pipe.
As shown in fig. 1, one end b of the cable 5 is electrically connected to the top end 7A of the wet end 7 through the cable weight 6 from top to bottom along the Y-axis direction.
The bottom end 6B of the cable balancing weight 6 is fixedly connected with the top end 7A of the wet joint 7. The cable weight 6 is a conductor, and the weight of the cable 5 is light, so that the cable 5 can be smoothly inserted. Meanwhile, the plugging of the cable joint needs to ensure the connection reliability, so the counterweight of the cable is needed to realize sealing and isolation of well fluid.
As shown in fig. 1, the bottom end 8B of the socket nipple 8 is fixed to the top end 3A of the screw pump 3.
As shown in fig. 1, the check valve 9 is disposed on a sidewall of the socket nipple body 801 near the top end 3A of the screw pump 3, and is disposed between the socket nipple body 801 and the tubing 2, and is configured to guide the fluid in the socket nipple body 801 out to an annulus 10 between the tubing 2 and the casing 3.
As shown in fig. 1, the first connection ring 702 and the second connection ring 803 are plural, and the number of the first connection ring 702 is the same as the number of the second connection ring 803. The first connection rings 702 are disposed at equal intervals on the sidewall of the wet joint body 701. The interval between any two adjacent first connection rings 702 is consistent with the interval between the second connection rings 803 at the corresponding positions, so as to ensure that the wet joint 7 is electrically connected with the socket nipple 8 after being spliced.
As shown in fig. 1, the first positioning ring 703 is disposed on the sidewall of the wet end connector body 701 between the last first connection ring 702 and the bottom end 7B of the wet end connector body 701. A second locating ring 804 is provided on the side wall of the socket sub body 801 between the last second connecting ring 803 and the check valve 9.
As shown in fig. 1, the guiding unit 802 is fixedly connected to the top end of the socket nipple body 801 from top to bottom along the Y-axis direction. The second connection rings 803 are uniformly disposed on the side wall of the socket nipple body 801.
As shown in fig. 2, the bottom end 7B of the wet end connector 7 is electrically connected to the socket short section 8 after being plugged into the guide unit 802, so that the first connection ring 702 is correspondingly contacted with the second connection ring 803, and the first positioning ring 703 is clamped with the second positioning ring 804. When the first positioning ring 703 is in contact with the second positioning ring 804, it is indicated that the wet joint 7 is in full contact with the socket nipple 8, and the first positioning ring 703 is clamped by the second positioning ring 804, so that the connection stability of the wet joint 7 and the socket nipple 8 is ensured.
In one embodiment, as shown in fig. 1, the wet joint 7 further comprises: a number of first insulating rings 704.
In one embodiment, as shown in fig. 1, the receptacle sub 8 further comprises: a number of second insulating rings 805.
Second insulating rings 805 are respectively disposed on the sidewalls of the socket sub body 801 between the second connecting rings 803.
In one embodiment, as shown in fig. 3, the novel submersible direct-drive lifting device further includes: a control unit 11.
The control unit 11 is installed outside the oil well and electrically connected to the other end a of the cable 5.
In one embodiment, as shown in FIG. 1, the cable 5 is a cylindrical cable.
Since the conventional cable is placed in the oil jacket ring air, the flat type cable is designed. The cable 5 is placed in the oil pipe 2, and the circular cable is adopted, so that the cable is more convenient to drop into the oil pipe 2.
In one embodiment, as shown in fig. 4, the receptacle sub 8 further comprises: a flat cable socket 12.
The flat cable socket 12 is arranged outside the side wall of the socket short section main body 801, and the flat cable 13 is electrically connected with the flat cable socket 12 through plugging.
In one embodiment, as shown in fig. 4, the novel submersible direct-drive lifting device further includes: a flat cable 13. One end c of the flat cable 13 is electrically connected to the flat cable socket 12, and the other end d of the flat cable 13 is electrically connected to the motor 4.
In particular implementation, as shown in fig. 5, the secondary connecting ring 803 is electrically connected to a receptacle connector 1202 disposed outside the sidewall of the receptacle sub body 801 via a wire 1201.
In one embodiment, the wet connector 7 is a male connector and the receptacle sub 8 is a female connector corresponding to the male connector.
The operation flow comprises the following specific steps:
firstly, an anchor and two tail pipes are put in;
secondly, a motor is put in and oil is injected into the motor;
a flat cable 13 connected with the motor 4;
the lower protector is connected with the motor 4 and used for injecting oil to the protector;
fifthly, the flexible shaft and the screw pump 5 are put in;
sixthly, inserting the socket short joint 8;
seventhly, an oil pipe 2 is arranged;
eighthly, setting the wellhead anchor;
ninthly, a cable 5 is inserted from the oil pipe 2;
after connection of the cable at the red (R) is finished, the oil pipe 2 is sealed and connected with a ground cable 5, and oil extraction is started.
Compared with the traditional underground direct-drive screw pump system, the underground direct-drive screw pump system is characterized in that a socket short section 8 is additionally arranged at the top end of the screw pump 3, the socket short section 8 is fixed on the inner wall of the oil pipe 2 through a standard oil pipe buckle, and the bottom end 8B of the socket short section 8 is fixedly connected with the screw pump 3. And a cable 5 in the oil pipe 2 is connected with a socket short joint 8 in a plugging way through a wet joint 7. A flat cable socket 12 is arranged on the outer wall of the socket short section 8, and the flat cable socket 12 is electrically connected with the motor 4, so that a conducting circuit from the ground to the underground motor 4 is formed.
The invention adopts the cable balancing weight, and the cable is very light and is difficult to drop only by self weight, so the cable can be smoothly dropped by a downward force in the dropping process. Meanwhile, the plugging of the wet joint 7 needs to ensure the reliability of connection, so that the cable counterweight is needed to realize sealing and isolation of well fluid.
The socket nipple 8 below the cable of the invention can lead the wet joint 7 to the socket nipple 8 in any angle when entering the well through the guide unit. When the wet joint 7 goes into the process, due to the action of the cable balancing weight 6, liquid at the joint of the wet joint 7 and the socket short section 8 is extruded downwards, and an environment without well liquid is manufactured. Fluid flows into the annulus 10 through a check valve 9 outside the socket sub 8.
The invention provides a novel submersible direct-drive lifting device, which comprises: the device comprises a casing, an oil pipe arranged in the casing, a screw pump fixedly connected with the bottom end of the oil pipe, a motor fixedly and electrically connected with the bottom end of the screw pump, a cable arranged in the oil pipe, a cable balancing weight, a wet joint, a socket short joint and a check valve; the wet joint includes: the wet joint comprises a wet joint body, a first connecting ring and a first positioning ring, wherein the first connecting ring and the first positioning ring are arranged on the side wall of the wet joint body; the socket nipple includes: the socket short section comprises a hollow socket short section main body, a guide unit fixed at the top end of the socket short section main body, a second connecting ring and a second positioning ring, wherein the second connecting ring and the second positioning ring are arranged on the side wall of the socket short section main body; one end of the cable is electrically connected with the top end of the wet joint through a cable balancing weight; the bottom end of the cable balancing weight is fixedly connected with the top end of the wet joint; the bottom end of the wet joint is electrically connected with the socket short section after being spliced through the guide unit, so that the first connecting ring is correspondingly contacted with the second connecting ring, and the first positioning ring is clamped with the second positioning ring; the bottom end of the socket short section is fixed at the top end of the screw pump; the check valve is arranged on the side wall of the socket short section main body close to the top end of the screw pump, arranged between the socket short section main body and the oil pipe and used for guiding out liquid in the socket short section main body. The invention has the advantages of reducing material and labor cost, simplifying construction process, reducing operation time and risk and improving operation efficiency.
The principle and the implementation mode of the invention are explained by applying specific embodiments in the invention, and the description of the embodiments is only used for helping to understand the method and the core idea of the invention; meanwhile, for a person skilled in the art, according to the idea of the present invention, there may be variations in the specific embodiments and the application scope, and in summary, the content of the present specification should not be construed as a limitation to the present invention.
Claims (10)
1. A novel submersible direct-drive lifting device comprises: the sleeve pipe, set up in oil pipe in the sleeve pipe, with oil pipe bottom fixed connection's screw pump and with the motor of the bottom fixed electricity connection of screw pump, its characterized in that, novel dive oil directly drive lifting devices still includes: the cable, the cable counterweight block, the wet joint, the socket short section and the check valve are arranged in the oil pipe; the wet joint includes: the wet joint comprises a wet joint body, a first connecting ring and a first positioning ring, wherein the first connecting ring and the first positioning ring are arranged on the side wall of the wet joint body; the socket sub comprises: the socket short section comprises a hollow socket short section main body, a guide unit fixed at the top end of the socket short section main body, a second connecting ring and a second positioning ring, wherein the second connecting ring and the second positioning ring are arranged on the side wall of the socket short section main body;
one end of the cable is electrically connected with the top end of the wet joint through the cable balancing weight;
the bottom end of the cable balancing weight is fixedly connected with the top end of the wet joint;
the bottom end of the wet joint is electrically connected with the socket short section after being spliced through the guide unit, so that the first connecting ring is correspondingly contacted with the second connecting ring, and the first positioning ring is clamped with the second positioning ring;
the bottom end of the socket short section is fixed at the top end of the screw pump;
the check valve is arranged on the side wall of the socket short section main body close to the top end of the screw pump, is arranged between the socket short section main body and the oil pipe and is used for guiding out liquid in the socket short section main body.
2. The novel submersible direct-drive lifting device according to claim 1, wherein the number of the first connecting rings is the same as that of the second connecting rings.
3. The novel submersible direct drive lifting device according to claim 2, wherein the wet joint further comprises: and the first insulating rings are respectively arranged between the first connecting rings.
4. The novel submersible direct drive lifting device according to claim 2, wherein the socket nipple further comprises: and the second insulating rings are respectively arranged between the second connecting rings.
5. The novel submersible direct drive lifting device according to claim 1, further comprising: a control unit disposed outside the oil well; the control unit is electrically connected with the other end of the cable.
6. The novel submersible direct drive lifting device according to any one of claims 1 to 5 wherein the cable is a cylindrical cable.
7. The novel submersible direct drive lifting device according to claim 1, wherein the socket nipple further comprises: and the flat cable socket is arranged outside the side wall of the socket short section main body.
8. The novel submersible direct drive lifting device according to claim 7, further comprising: a flat cable; one end of the flat cable is electrically connected with the flat cable socket, and the other end of the flat cable is electrically connected with the motor.
9. The novel submersible direct drive lifting device according to claim 1, wherein the cable counter weight is an electrical conductor.
10. The novel submersible direct-drive lifting device according to claim 1, wherein the wet joint is a male joint, and the socket nipple is a female joint corresponding to the male joint.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910211868.9A CN111720098A (en) | 2019-03-20 | 2019-03-20 | Novel oil of diving directly drives lifting device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910211868.9A CN111720098A (en) | 2019-03-20 | 2019-03-20 | Novel oil of diving directly drives lifting device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111720098A true CN111720098A (en) | 2020-09-29 |
Family
ID=72563307
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910211868.9A Pending CN111720098A (en) | 2019-03-20 | 2019-03-20 | Novel oil of diving directly drives lifting device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111720098A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112943171A (en) * | 2021-03-11 | 2021-06-11 | 哈尔滨艾拓普科技有限公司 | Cable-throwing type electric submersible screw pump and implementation method thereof |
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| CN208397477U (en) * | 2018-06-29 | 2019-01-18 | 宁波海连汽配科技有限公司 | A kind of famale connector of easily disassembled positioning ring |
| CN109138930A (en) * | 2018-10-23 | 2019-01-04 | 辽宁金至辉石油机械制造有限公司 | Straight cutting operated type submersible screw pump oil extraction device in a kind of pipe |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112943171A (en) * | 2021-03-11 | 2021-06-11 | 哈尔滨艾拓普科技有限公司 | Cable-throwing type electric submersible screw pump and implementation method thereof |
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Application publication date: 20200929 |