CN111120300A - Hydraulic pump for downhole tool for drilling - Google Patents
Hydraulic pump for downhole tool for drilling Download PDFInfo
- Publication number
- CN111120300A CN111120300A CN201811285003.9A CN201811285003A CN111120300A CN 111120300 A CN111120300 A CN 111120300A CN 201811285003 A CN201811285003 A CN 201811285003A CN 111120300 A CN111120300 A CN 111120300A
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- China
- Prior art keywords
- rotor
- stator
- hydraulic pump
- port plate
- drive shaft
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- 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
- 238000005553 drilling Methods 0.000 title claims abstract description 25
- 230000007704 transition Effects 0.000 claims abstract description 17
- 230000013011 mating Effects 0.000 claims description 4
- 230000007423 decrease Effects 0.000 claims description 3
- 238000007789 sealing Methods 0.000 claims description 3
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 abstract description 4
- 239000003345 natural gas Substances 0.000 abstract description 2
- 239000003209 petroleum derivative Substances 0.000 abstract description 2
- 238000009434 installation Methods 0.000 description 7
- 238000010521 absorption reaction Methods 0.000 description 5
- 238000006073 displacement reaction Methods 0.000 description 5
- 238000010586 diagram Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 239000007789 gas Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000002093 peripheral effect Effects 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 230000003245 working effect Effects 0.000 description 1
Images
Classifications
-
- 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
- F04C2/30—Rotary-piston machines or pumps having the characteristics covered by two or more groups F04C2/02, F04C2/08, F04C2/22, F04C2/24 or having the characteristics covered by one of these groups together with some other type of movement between co-operating members
- F04C2/34—Rotary-piston machines or pumps having the characteristics covered by two or more groups F04C2/02, F04C2/08, F04C2/22, F04C2/24 or having the characteristics covered by one of these groups together with some other type of movement between co-operating members having the movement defined in groups F04C2/08 or F04C2/22 and relative reciprocation between the co-operating members
- F04C2/344—Rotary-piston machines or pumps having the characteristics covered by two or more groups F04C2/02, F04C2/08, F04C2/22, F04C2/24 or having the characteristics covered by one of these groups together with some other type of movement between co-operating members having the movement defined in groups F04C2/08 or F04C2/22 and relative reciprocation between the co-operating members with vanes reciprocating with respect to the inner member
-
- 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
-
- 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
- F04C15/06—Arrangements for admission or discharge of the working fluid, e.g. constructional features of the inlet or outlet
-
- 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
- F04C2240/00—Components
- F04C2240/10—Stators
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Rotary Pumps (AREA)
Abstract
The invention provides a hydraulic pump for a drilling downhole tool, which comprises: a drive shaft; a rotor and blades connected to the drive shaft; a stator provided outside the rotor and the blades; the two valve plates are symmetrically arranged on two sides of the rotor and are fixedly connected with the stator; and the two transition discs are respectively connected to the outer sides of the two port plates and are connected with the port plates on the same side through bearings and the driving shaft. The hydraulic pump is suitable for underground operation tools for petroleum and natural gas drilling, and has stable and reliable work and large discharge capacity.
Description
Technical Field
The invention belongs to the technical field of petroleum and natural gas drilling tools, and particularly relates to a hydraulic pump for a drilling downhole tool.
Background
In oil and gas drilling operations, in order to complete special operations, the reliability and effectiveness of a power source of a downhole drilling tool need to be ensured. A hydraulic pump is one of the most commonly used power sources, and the power supply capacity is determined in a hydraulic system. Among several kinds of hydraulic pumps, vane pumps work stably, have small displacement fluctuation and long service life, and are widely applied. However, the vane pump has a complex structure, poor oil absorption characteristics, unreasonable flow distribution and large occupied space, and cannot normally work in a narrow installation space of some downhole drilling tools, so that petroleum operation cannot be normally finished, the operation time is prolonged, and the operation cost is increased.
Disclosure of Invention
Aiming at part or all of the technical problems in the prior art, the invention provides a hydraulic pump for a drilling downhole tool, which is suitable for an oil and gas drilling downhole operation tool, and has stable and reliable work and large discharge capacity.
In order to achieve the above object, the present invention provides a hydraulic pump for a downhole tool for drilling, comprising:
a drive shaft;
a rotor and blades connected to the drive shaft;
a stator provided outside the rotor and the blades;
the two valve plates are symmetrically arranged on two sides of the rotor and are fixedly connected with the stator;
and the two transition discs are respectively connected to the outer sides of the two port plates and are connected with the port plates on the same side through bearings and the driving shaft.
In the invention, the flow distribution and oil absorption characteristics of the hydraulic pump are improved by adopting the two flow distribution discs, and the connection with the downhole drilling tool is realized by the two transition discs, so that the hydraulic pump is suitable for the narrow installation space of the downhole drilling tool.
In one embodiment, the inner surface of the stator is formed by connecting a plurality of curves with different radii, and adjacent curves are transited by smooth curves.
In one embodiment, a plurality of blades are symmetrically arranged on the rotor, two adjacent blades, the outer surface of the rotor and the inner surface of the stator which are clamped between the two adjacent blades form a working space, and the working space formed by the two adjacent blades finishes multiple oil suction and multiple oil pressing every time the rotor rotates for one circle.
In one embodiment, the space increases when the rotor turns to a large radius curve, the port plate absorbs oil, and the space decreases when the rotor turns to a small radius curve, pressing oil through the port plate.
In one embodiment, the working space formed by two adjacent blades absorbs and presses oil for the same number of times as the number of curves forming the inner surface of the stator.
In one embodiment, the inner surface of the stator is composed of four curves with different radius sizes, and when the rotor rotates for one circle, the space formed by two adjacent blades completes four times of oil suction and four times of oil pressing.
In one embodiment, the two sides of the stator are provided with mounting parts with shoulders, the outer surface of the port plate is provided with an annular matching surface, and the mounting parts of the stator and the annular matching surface of the port plate are fixedly connected through sinking screws.
In one embodiment, a stepped hole-shaped mounting part is formed in the middle of one side of the port plate, which is away from the rotor, the driving shaft penetrates through the middle of the port plate, a bearing and a shaft seal are mounted between the stepped hole-shaped mounting part of the port plate and the driving shaft, and an annular groove for clamping a convex part on the outer side of the bearing is formed in the port plate.
In one embodiment, the driving shaft is connected with the rotor through an axial flat key, and the middle of the driving shaft is hollow.
In one embodiment, a sealing element is arranged between the valve plate and the stator, and the outer peripheral surface of the stator is uniformly provided with a plurality of mounting grooves for connecting with a drilling tool.
Compared with the prior art, the invention has the advantages that:
the two port plates are symmetrically arranged on the two sides of the rotor to improve the port performance, the number of integrally adopted parts is small, the connection structure is simple and reliable, and the two transition plates are arranged to realize that the hydraulic pump is easy to install in a narrow installation space such as a drilling downhole tool.
In addition, the inner surface of the stator is formed by connecting a plurality of sections of curves with different radiuses, so that oil absorption and oil pressing can be realized for many times in one rotation period, the displacement of the hydraulic pump is greatly increased, and power supply is guaranteed. And because sealing and connection structure are more reasonable, impurity is difficult for getting into in the blade working space, and whole working property is more stable, more reliable.
Drawings
Preferred embodiments of the present invention will be described in detail below with reference to the attached drawing figures, wherein:
FIG. 1 is a schematic diagram of one embodiment of a hydraulic pump for a downhole tool for drilling according to the present invention;
FIG. 2 is a schematic diagram of a cross-sectional view A-A of the hydraulic pump for the downhole tool of FIG. 1.
In the drawings, like parts are provided with like reference numerals. The figures are not drawn to scale.
Detailed Description
In order to make the technical solutions and advantages of the present invention more apparent, exemplary embodiments of the present invention are described in further detail below with reference to the accompanying drawings. It is clear that the described embodiments are only a part of the embodiments of the invention, and not an exhaustive list of all embodiments. And the embodiments and features of the embodiments may be combined with each other without conflict.
The inventor notices in the invention process that the existing vane pump can not normally work in a narrow installation space of some drilling downhole tools, and the oil operation can not be normally finished due to poor oil absorption property and unreasonable flow distribution, thereby prolonging the operation time and increasing the operation cost.
In view of the above disadvantages, embodiments of the present invention provide a hydraulic pump for a downhole tool for drilling, which will be described in detail below.
Fig. 1 and 2 show a schematic structural diagram of one embodiment of the hydraulic pump for the downhole drilling tool of the present invention. In this embodiment, the hydraulic pump for a downhole drilling tool of the present invention mainly comprises: drive shaft 10, rotor 4, blades 9, stator 3, two port plates and two transition plates. Wherein the blades 9 are mounted on the rotor 4, the rotor 4 being mounted on the drive shaft 10. The stator 3 is arranged outside the rotor 4 and the blades 9 abut against the inner surface of the stator 3. The blades 9 form a working area between the outer surface of the rotor 4 and the inner surface of the stator 3. The two port plates 2 and 5 are symmetrically arranged at two sides of the rotor 4, and the two port plates 2 and 5 are respectively and fixedly connected with two ends of the stator 3. The two transition discs 1 and 6 are respectively connected to the outer sides of the two port plates 2 and 5, and the transition discs 1 and 6 are respectively connected with the port plates 2 and 5 on the same side through bearings and a driving shaft 10. With this coupling structure, when the drive shaft 10 rotates, the rotor 4 and the blades 9 mounted on the rotor 4 rotate together with the drive shaft 10. While the front port plate 2 is fixed against rotation with the rear port plate 5 and the stator 3.
In one embodiment, as shown in fig. 2, the inner surface of the stator 3 is composed of a plurality of curved lines with different radii, and adjacent curved lines are transited by a smooth curve. The multi-segment herein refers to three or more curves, and the radii of the curves are different. The existing vane type hydraulic pump is generally provided with curves with the same radius at the corresponding side of a stator, so that oil suction at one side and oil pressing at the other side are realized when the hydraulic pump works.
In one embodiment, as shown in fig. 1 and 2, a plurality of blades 9 are symmetrically disposed on the rotor 4. The two adjacent blades 9, the outer surface of the rotor 4 clamped between the two adjacent blades 9 and the inner surface of the stator 3 form a blade working space, and the working space formed by the two adjacent blades finishes multiple oil suction and multiple oil pressing every time the rotor rotates for one circle. The oil suction and oil discharge are completed once after each section of curve, and because of the curves with different radiuses, the working space formed by two adjacent blades can complete oil suction and oil discharge for many times in one period. The existing vane type hydraulic pump generally realizes oil suction at one side and oil pressing at one side. The space between two adjacent blades generally completes oil suction and oil pressing once or twice in one period.
In one embodiment, as shown in FIG. 2, the space increases when the rotor 4 turns to a large radius curve, the port plate 2 or 5 absorbs oil, and the space decreases when the rotor 4 turns to a small radius curve, pressing oil through the port plate 5 or 2.
In one embodiment, as shown in fig. 1, the left and right inner sides of the stator 3 are formed with mounting portions having inner shoulders, respectively. The outer surfaces of the front port plate 2 and the rear port plate 5 are formed with annular or snap ring-shaped mating surfaces. The front port plate 2 is inserted into the left inner side of the stator 3 from the left side and abuts against the left inner shoulder of the stator 3, and the front port plate 2 and the stator 3 are connected by a sunk fastening screw. The mating surface of the outer surface of the rear port plate 5 is inserted from the right side into the right inner side of the stator 3 and abuts against the right inner shoulder of the stator 3, and then the rear port plate 5 is fixedly connected to the right side of the stator 3 by a sunk fastening screw. The left side installation part of the stator 3 is fixedly connected with the annular matching surface of the front valve plate 2 and the right side installation part of the stator 3 is fixedly connected with the annular matching surface of the rear valve plate 5 through a plurality of sinking screws or fastening screws. In an embodiment not shown, the connection of the stator 3 to the front port plate 2 and to the rear port plate 5 can also be realized by means of a threaded structure.
In one embodiment, as shown in fig. 1, the front port plate 2 and the rear port plate 5 are formed with a stepped hole-shaped mounting portion in the middle of the side facing away from the rotor 4. The drive shaft 10 passes through the middle of the front port plate 2, the rotor 4 and the rear port plate 5 in this order. The drive shaft 10 is connected to the rotor 4 by an axially disposed flat key. A bearing 7 and a shaft seal 8 are arranged between the drive shaft 10 and the stepped hole-shaped mounting part on the left side of the front port plate 2 and between the drive shaft 10 and the stepped hole-shaped mounting part on the right side of the rear port plate 5. The front transition disc 1 is connected with the front port plate 2 through a bearing, and the rear transition disc 6 is connected with the rear port plate 5 through a bearing. The middle part of the front transition disc 1 is provided with an annular structure extending from a stepped hole-shaped mounting part of the front port plate 2, the middle part of the rear transition disc 6 is provided with an annular structure extending from a stepped hole-shaped mounting part of the rear port plate 5, and one side of the front port plate 2 close to the front transition disc 1 and one side of the rear port plate 5 close to the rear transition disc 6 are respectively provided with an annular groove for clamping an outer convex part of a corresponding bearing. And overall structure, the biggest external diameter of preceding transition dish 1, preceding valve plate 2, stator 3, back valve plate 5 and back transition dish 6 is all equal, and this kind of structural arrangement can guarantee to install behind the well drilling downhole tool, and overall connection compact structure is applicable to and provides power for the downhole tool that installation space is little, the demand discharge capacity is big. Moreover, the structural arrangement of the two port plates 2 and 5 contributes to improving the overall port efficiency and increasing the displacement supply.
In one embodiment, as shown in fig. 1 and 2, the middle of the drive shaft is provided as a hollow. The structure of the driving shaft is mainly used for meeting the requirements of downhole operation and facilitating liquid drainage. Meanwhile, the weight is reduced under the condition of ensuring the rigidity of the driving shaft.
In one embodiment, as shown in fig. 1 and 2, a seal is mounted between the port plate and the stator. The peripheral surface of stator evenly is equipped with a plurality of mounting grooves that are used for being connected with the drilling tool.
In one embodiment, as shown in fig. 1 and 2, the working space formed by two adjacent vanes 9 sucks and presses oil as many times as the number of curves forming the inner surface of the stator 3. That is, if the inner surface of the stator 3 is formed by three or four curves, the number of times of sucking and pressing oil in the working space formed by two adjacent vanes 9 in one cycle is three or four times, respectively. The structure greatly increases the times of oil suction and oil pressing of the hydraulic pump in one period, and increases the displacement of the hydraulic pump. And because the two port plates 2 and 5 are arranged, the oil can be well supplied through the two port plates 2 and 5 in the working process of the hydraulic pump.
In one embodiment, as shown in fig. 2, the stator 3 is composed of four curves with different radius sizes, and the adjacent curves are transited by a smooth connecting curve. When the rotor 4 rotates for one circle, the space formed by two adjacent blades 9 can suck oil and press oil for four times. That is, at the same time, the working spaces of the vanes corresponding to the positions where the four sections of curve spaces become larger are all in an oil absorption state, and the working spaces of the vanes corresponding to the positions where the four sections of curve spaces become smaller are all in an oil pressing state, so that the displacement of the hydraulic pump is greatly increased.
While preferred embodiments of the present invention have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. Therefore, the appended claims are intended to be construed to include preferred embodiments and all such changes and/or modifications as fall within the scope of the invention, and all such changes and/or modifications as are made to the embodiments of the present invention are intended to be covered by the scope of the invention.
Claims (10)
1. A hydraulic pump for a downhole tool for drilling, comprising:
a drive shaft;
a rotor and blades connected to the drive shaft;
a stator provided outside the rotor and the blades;
the two valve plates are symmetrically arranged on two sides of the rotor and are fixedly connected with the stator; and
and the two transition discs are respectively connected to the outer sides of the two port plates and are connected with the port plates on the same side through bearings and the driving shaft.
2. The hydraulic pump of claim 1, wherein the stator inner surface is formed by a plurality of curved segments of different radii joined together, and adjacent curved segments transition from one another by a smooth curve.
3. The hydraulic pump according to claim 1 or 2, wherein a plurality of vanes are symmetrically arranged on the rotor, two adjacent vanes, the outer surface of the rotor and the inner surface of the stator which are clamped between the two adjacent vanes form a working space, and the working space formed by the two adjacent vanes can complete multiple oil suction and multiple oil pressing per rotation of the rotor.
4. The hydraulic pump of claim 3, wherein the space increases when the rotor turns to the large radius curve, the port plate draws oil, and the space decreases when the rotor turns to the small radius curve, the oil being pressed through the port plate.
5. The hydraulic pump of claim 4, wherein the working space defined by two adjacent vanes draws and presses oil the same number of times as the number of curves defining the inner surface of the stator.
6. The hydraulic pump as claimed in claim 5, wherein the inner surface of the stator is formed by four curves with different radius sizes, and the space formed by two adjacent vanes performs four times of oil suction and four times of oil pressing when the rotor rotates for one circle.
7. The hydraulic pump of claim 1, wherein mounting portions with shoulders are formed on both sides of the stator, an annular mating surface is formed on the outer surface of the port plate, and the mounting portions of the stator and the annular mating surface of the port plate are fixedly connected through sunk screws.
8. The hydraulic pump according to claim 7, wherein a stepped hole-shaped mounting part is formed in the middle of one side of the port plate, which faces away from the rotor, the drive shaft penetrates through the middle of the port plate, a bearing and a shaft seal are arranged between the stepped hole-shaped mounting part of the port plate and the drive shaft, and an annular groove for clamping a convex part on the outer side of the bearing is formed in the port plate.
9. The hydraulic pump according to claim 7 or 8, wherein the drive shaft is connected with the rotor through an axial flat key, and the middle part of the drive shaft is hollow.
10. The hydraulic pump according to any one of claims 7 to 9, wherein a sealing member is installed between the port plate and the stator, and the outer circumferential surface of the stator is uniformly provided with a plurality of mounting grooves for connection with a drilling tool.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811285003.9A CN111120300A (en) | 2018-10-31 | 2018-10-31 | Hydraulic pump for downhole tool for drilling |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811285003.9A CN111120300A (en) | 2018-10-31 | 2018-10-31 | Hydraulic pump for downhole tool for drilling |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111120300A true CN111120300A (en) | 2020-05-08 |
Family
ID=70485294
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811285003.9A Pending CN111120300A (en) | 2018-10-31 | 2018-10-31 | Hydraulic pump for downhole tool for drilling |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111120300A (en) |
Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3307454A (en) * | 1964-06-19 | 1967-03-07 | Atlas Copco Ab | Rotary piston machines and cylinder housings |
| CN2049698U (en) * | 1988-10-06 | 1989-12-20 | 邵锐勋 | Ultralow speed oil pump capable of ejecting vane automatically |
| CN2477823Y (en) * | 2001-04-16 | 2002-02-20 | 王同斌 | Oil producing appts. having two-tube pillar and vane pump |
| CN201170190Y (en) * | 2007-08-29 | 2008-12-24 | 王海军 | Dynamoelectric oil well pump |
| CN201241825Y (en) * | 2008-08-13 | 2009-05-20 | 徐清娒 | High pressure and high flow vane type oil pump with porous oil inlet and outlet |
| CN102840134A (en) * | 2012-09-05 | 2012-12-26 | 浙江台州先顶液压有限公司 | Hydraulic control mechanism for vanes |
| CN202746199U (en) * | 2012-09-05 | 2013-02-20 | 浙江台州先顶液压有限公司 | Hydraulic control mechanism |
| CN103727028A (en) * | 2013-12-18 | 2014-04-16 | 宁波市鄞州金本机械有限公司 | Double-acting impeller pump |
| CN203685562U (en) * | 2013-12-23 | 2014-07-02 | 马江 | Double-acting variable-displacement vane pump or motor |
| CN203856716U (en) * | 2014-04-17 | 2014-10-01 | 李翔 | Low-rotating-speed vane pump |
| CN204140385U (en) * | 2014-09-24 | 2015-02-04 | 胡凯 | A kind of Vane-type hydraulic machine of improvement |
| DE102015208643A1 (en) * | 2014-05-20 | 2015-11-26 | Schaeffler Technologies AG & Co. KG | Vane machine |
-
2018
- 2018-10-31 CN CN201811285003.9A patent/CN111120300A/en active Pending
Patent Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3307454A (en) * | 1964-06-19 | 1967-03-07 | Atlas Copco Ab | Rotary piston machines and cylinder housings |
| CN2049698U (en) * | 1988-10-06 | 1989-12-20 | 邵锐勋 | Ultralow speed oil pump capable of ejecting vane automatically |
| CN2477823Y (en) * | 2001-04-16 | 2002-02-20 | 王同斌 | Oil producing appts. having two-tube pillar and vane pump |
| CN201170190Y (en) * | 2007-08-29 | 2008-12-24 | 王海军 | Dynamoelectric oil well pump |
| CN201241825Y (en) * | 2008-08-13 | 2009-05-20 | 徐清娒 | High pressure and high flow vane type oil pump with porous oil inlet and outlet |
| CN102840134A (en) * | 2012-09-05 | 2012-12-26 | 浙江台州先顶液压有限公司 | Hydraulic control mechanism for vanes |
| CN202746199U (en) * | 2012-09-05 | 2013-02-20 | 浙江台州先顶液压有限公司 | Hydraulic control mechanism |
| CN103727028A (en) * | 2013-12-18 | 2014-04-16 | 宁波市鄞州金本机械有限公司 | Double-acting impeller pump |
| CN203685562U (en) * | 2013-12-23 | 2014-07-02 | 马江 | Double-acting variable-displacement vane pump or motor |
| CN203856716U (en) * | 2014-04-17 | 2014-10-01 | 李翔 | Low-rotating-speed vane pump |
| DE102015208643A1 (en) * | 2014-05-20 | 2015-11-26 | Schaeffler Technologies AG & Co. KG | Vane machine |
| CN204140385U (en) * | 2014-09-24 | 2015-02-04 | 胡凯 | A kind of Vane-type hydraulic machine of improvement |
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Effective date of registration: 20220214 Address after: 100029 Chaoyang District, Beijing Hui Xin Street six, Twelfth level. Applicant after: SINOPEC OILFIELD SERVICE Corp. Applicant after: SINOPEC SHENGLI PETROLEUM ENGINEERING Co.,Ltd. Applicant after: Sinopec Jingwei Co.,Ltd. Applicant after: Geological measurement and Control Technology Research Institute of Sinopec Jingwei Co.,Ltd. Address before: 100101 Beichen West Road, Chaoyang District, Beijing 8 Beichen world center, block A 703. Applicant before: SINOPEC OILFIELD SERVICE Corp. Applicant before: SINOPEC SHENGLI PETROLEUM ENGINEERING Co.,Ltd. Applicant before: Sinopec Shengli Petroleum Engineering Co.,Ltd. Measurement and Control Technology Center While Drilling |
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| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20200508 |