CN111535779B - Traveling valve and forced closing of anti-stuck oil pump - Google Patents
Traveling valve and forced closing of anti-stuck oil pump Download PDFInfo
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- CN111535779B CN111535779B CN202010325925.9A CN202010325925A CN111535779B CN 111535779 B CN111535779 B CN 111535779B CN 202010325925 A CN202010325925 A CN 202010325925A CN 111535779 B CN111535779 B CN 111535779B
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- traveling valve
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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
- E21B34/00—Valve arrangements for boreholes or wells
- E21B34/06—Valve arrangements for boreholes or wells in wells
- E21B34/14—Valve arrangements for boreholes or wells in wells operated by movement of tools, e.g. sleeve valves operated by pistons or wire line tools
-
- 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
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- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Details Of Reciprocating Pumps (AREA)
- Check Valves (AREA)
Abstract
本发明公开了游动阀以及强制关闭防卡抽油泵，本发明提供的游动阀以及强制关闭防卡抽油泵，其游动阀的关闭依靠吸入液的反相射流冲击；其固定阀的关闭依靠顶杆的弹力推动，并增加了机械除砂破蜡功能；使用该游动阀和该固定阀的强制关闭防卡抽油泵克服了现有斜井泵的不足，提高了泵效和使用寿命，降低了采油成本。
The present invention discloses a floating valve and a forced-closing anti-stuck oil pump. The floating valve and the forced-closing anti-stuck oil pump provided by the present invention are characterized in that the closing of the floating valve relies on the impact of the reverse jet of the suction liquid; the closing of the fixed valve relies on the elastic force of the push rod, and a mechanical sand and wax removal function is added; the forced-closing anti-stuck oil pump using the floating valve and the fixed valve overcomes the shortcomings of the existing inclined well pump, improves the pump efficiency and service life, and reduces the oil production cost.
Description
Technical Field
The invention belongs to the field of oilfield oil extraction equipment, and particularly relates to a traveling valve and a forced-closing anti-seize oil pump.
Background
With the continuous development of oil fields and the continuous progress of drilling technology, the application of highly deviated wells and horizontal wells is more and more widespread, and because the common oil pump cannot work normally in the highly deviated wells and the horizontal wells, the inclined well oil pump becomes a main tool in the inclined well exploitation process. The existing inclined well oil pump generally adopts a mode of spring reset and pushing valve ball to be closed forcedly, and the mode solves the problem of delayed closing of the valve ball, but has the following defects, so that the inclined well oil pump has short service life and frequent oil well operation.
1. The travelling valve on the plunger assembly is limited by the size, the oil flow channel is originally narrow, and after the reset spring is added, the oil flow channel is further compressed, so that the flow resistance at the position is multiplied, and the pump efficiency is seriously influenced.
2. Due to the size limitation, the floating valve reset spring is small in design medium diameter, the diameter of a steel wire is small, the working stress of the spring is high, the spring is positioned in a liquid flow area and is continuously flushed by high-speed oil flow passing through a narrow flow passage, and under the complex environment, the spring is quickly damaged and loses efficacy, so that the valve ball fails to close.
3. The fixed valve has wide size space, and the reset spring is designed without the problems, but because the fixed valve has large flow passage sectional area and low flow velocity, the oil flow passing through the fixed valve has small sand carrying and scouring capacity, and the valve ball is in a horizontal working state, so that sand sedimentation and wax deposition phenomena are easy to form at the fixed valve, and after the fixed valve is accumulated to a certain extent, the valve ball is blocked and cannot be closed, which is one of the main reasons for frequently failing inclined shaft pumps.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide a traveling valve and a forced-closing anti-seize oil pump.
The aim of the invention is achieved by the following technical scheme.
A traveling valve comprising:
A traveling valve cover is arranged on the valve seat,
The traveling valve core comprises an A section and a B section, wherein the A section is arranged adjacent to the traveling valve seat, the B section is arranged away from the traveling valve seat, a gap is reserved between the A section of the traveling valve core and the traveling valve seat,
And a traveling valve ball movably arranged in the traveling valve core section A;
The section B of the floating valve core is provided with a conical flow passage with a large outside and a small inside from outside to inside.
The cone angle of the conical flow passage is 8-15 degrees, and the flow passage area of the small end is 0.52-0.62 times of the projection area of the traveling valve ball.
And the section B of the traveling valve core is provided with a Venturi flow passage.
A forced shut off anti-seize oil pump comprising:
the pump cylinder assembly comprises an upper coupling, a pump cylinder, a lower coupling and a fixed valve which are sequentially connected from top to bottom;
The plunger assembly comprises an oil outlet connector, an upper traveling valve connector, a plunger, a lower traveling valve connector, a lower traveling valve and an oil inlet connector which are sequentially connected from top to bottom, wherein the upper traveling valve and the lower traveling valve are traveling valves with the same structure;
The plunger assembly is arranged in the pump cylinder assembly in a sleeved mode.
The stationary valve includes:
The valve joint is fixed and the valve joint is fixed,
The embedded valve cover and the fixed valve seat are arranged in the fixed valve joint side by side, the two ends of the embedded valve cover are respectively a C end and a D end, the C end is arranged adjacent to the fixed valve seat, the D end is arranged away from the fixed valve seat, the C end of the embedded valve cover is abutted to the fixed valve seat, the embedded valve cover is provided with an overflow hole penetrating through the end face of the D end of the embedded valve cover,
A fixed valve ball movably arranged in the overflow cavity of the embedded valve cover,
The push rod penetrates through the end face of the end of the D end of the embedded valve cover in a sliding mode, the two ends of the push rod are respectively an E end and an F end, the E end is arranged adjacent to the fixed valve seat, the F end is arranged away from the fixed valve seat, the E end of the push rod is provided with a descaling ring, the fixed valve ball is located between the descaling ring and the end of the C end of the embedded valve cover, the push rod is sleeved with a telescopic piece, and the telescopic piece is located between the inner end face of the end of the D end of the embedded valve cover and the descaling ring.
The push rod comprises a rod body and supporting ribs, the descaling ring is arranged on the rod body through the supporting ribs, a sharp knife edge is arranged at the end part of the descaling ring, and the projection area of the descaling ring is larger than that of the fixed valve ball.
When the fixed valve is closed, the end face of the F end of the ejector rod and the outer end face of the D end of the embedded valve cover are positioned on the same plane.
The invention has the beneficial effects that the traveling valve and the forced-closing anti-seize oil pump provided by the invention have the advantages that the traveling valve is closed by means of reverse jet impact of the suction liquid, the fixed valve is closed by means of the elastic force of the ejector rod, the mechanical sand and wax removing function is added, the traveling valve and the forced-closing anti-seize oil pump with the fixed valve overcome the defects of the conventional inclined well pump, the pump efficiency is improved, the service life is prolonged, and the oil extraction cost is reduced.
Drawings
Fig. 1 is a schematic structural view of a traveling valve.
Fig. 2 is a schematic structural view of the traveling spool in fig. 1.
Fig. 3 is another schematic structural view of the traveling spool.
Fig. 4 is a schematic view of still another construction of the traveling spool.
Fig. 5 is a schematic view of the structure when the fixed valve is closed.
Fig. 6 is a schematic view of the structure when the fixed valve is opened.
Fig. 7 is a schematic view of the structure of the embedded valve cover.
Fig. 8 is a front view of a stationary valve carrier rod.
Fig. 9 is a side view of a stationary valve carrier rod.
Fig. 10 is a schematic structural view of the forced closing anti-seize oil pump.
In the figure, 10 is a traveling valve, 11 is a traveling valve housing, 12 is a traveling valve core, 13 is a traveling valve ball, 14 is a traveling valve seat, 20 is a fixed valve, 21 is a fixed valve joint, 22 is a fixed valve seat, 23 is a fixed valve ball, 24 is a push rod, 241 is a rod body, 242 is a support rib, 25 is a descaling ring, 26 is an embedded valve housing, 27 is a telescopic member, 30 is a pump cylinder assembly, 31 is an upper coupling, 32 is a pump cylinder, 33 is a lower coupling, 40 is a plunger assembly, 41 is an oil outlet joint, 42 is an upper traveling valve joint, 43 is a plunger, 44 is a lower traveling valve joint, 45 is an oil inlet joint, 101 is an upper traveling valve, and 102 is a lower traveling valve.
Detailed Description
As shown in fig. 1 to 4, a traveling valve 10 includes a traveling valve housing 11, a traveling valve element 12, a traveling valve seat 14, and a traveling valve ball 13. In order to more clearly illustrate the traveling valve of the present invention, as shown in fig. 2 to 4, the traveling valve core 12 is divided into a section a and a section B by using a broken line as a dividing line in the drawing, and it should be noted that this is not a limitation of the technical scheme of the present invention.
The traveling valve core 12 and the traveling valve seat 14 are arranged in the traveling valve cover 11 side by side, the traveling valve core 12 comprises a section A and a section B, the section A is arranged adjacent to the traveling valve seat 14, the section B is arranged away from the traveling valve seat 14, a gap is reserved between the section A of the traveling valve core 12 and the traveling valve seat 14, a step is arranged on the traveling valve cover 11 and is arranged in the gap, the traveling valve ball 13 is movably arranged in the section A of the traveling valve core 12, and the traveling valve ball 13 can freely jump in a cavity enclosed by the section A of the traveling valve core 12 and the traveling valve seat 14. When the traveling valve 10 is closed, the traveling valve ball 13 is seated on the sealing surface of the traveling valve seat 14.
The section B of the traveling valve core 12 is provided with a conical flow passage with a large outside and a small inside from outside to inside, and the cone angle of the conical flow passage is Y.
Further, the cone angle Y of the conical flow passage is 8-15 degrees, and the flow passage area of the small end is 0.52-0.62 times of the projection area of the traveling valve ball 13.
Further, section B of the traveling spool 12 is provided with a venturi flow passage as shown in fig. 1 and 2.
When the traveling valve 10 is used, the section B of the traveling valve core 12 faces upwards and the section A faces downwards, and when the oil pump is in the upward stroke, the plunger assembly starts to move upwards, suction liquid in an oil pipe on the pump flows reversely, the fluid instantaneously increases in linear velocity through a conical flow passage with a cone angle Y of the traveling valve core 12, jet flow is generated, jet impact is carried out on the traveling valve ball 13, and the traveling valve ball 13 is pushed to be closed in advance. When the oil pump is in the down stroke, the plunger assembly is changed from up to down, the pressure in the pump cavity is increased, the traveling valve ball 13 is jacked up, and oil enters the upper oil pipe of the pump through the inner channel of the plunger assembly.
As shown in fig. 5 to 9, a fixed valve 20 includes a fixed valve joint 21, an embedded valve cover 26, a fixed valve seat 22, a fixed valve ball 23, a push rod 24 and a descaling ring 25. In order to more clearly illustrate the fixed valve 20 of the present invention, as shown in fig. 7 and 8, the two ends of the embedded valve cover 26 are divided into a C end and a D end, the D end is an end surface having an overflow hole for oil circulation, and the two ends of the push rod 24 are divided into an E end and an F end, which should be noted that the present invention is not limited thereto.
The fixed valve joint 21 is internally provided with a step for limiting the fixed valve seat 22, the embedded valve cover 26 and the fixed valve seat 22 are arranged in the fixed valve joint 21 side by side, two ends of the embedded valve cover 26 are respectively a C end and a D end, the C end is arranged adjacent to the fixed valve seat 22, the D end is arranged away from the fixed valve seat 22, the C end of the embedded valve cover 26 abuts against the fixed valve seat 22 to tightly press the fixed valve seat 22 in the fixed valve joint 21, the embedded valve cover 26 is provided with an overflow hole penetrating through the end face of the D end of the embedded valve cover 26 and used for oil circulation, the fixed valve ball 23 is movably arranged in an overflow cavity of the embedded valve cover 26, and the fixed valve ball 23 can freely jump in the overflow cavity along the axial direction.
The embedded valve cover 26 is further provided with a push rod 24 which penetrates through the end face of the end of the embedded valve cover 26 in a sliding mode, the push rod 24 can axially slide in the overflow cavity of the embedded valve cover 26, two ends of the push rod 24 are respectively an E end and an F end, the E end is arranged adjacent to the fixed valve seat 22, the F end is arranged away from the fixed valve seat 22, the E end of the push rod 24 is provided with a descaling ring 25, the outer circle of the descaling ring 25 is in sliding fit with the inner cavity of the embedded valve cover 26, the fixed valve ball 23 is located between the descaling ring 25 and the end of the embedded valve cover 26C, the push rod 24 is sleeved with a telescopic piece 27, the telescopic piece 27 is located between the end face of the end of the embedded valve cover 26D and the descaling ring 25, and the telescopic piece 27 is preferably a compression spring. The fixed valve ball 23 can be pushed to be seated on the sealing surface of the fixed valve seat 22 by the elastic force of the push rod 24 and the telescopic member 27.
Further, the ejector rod 24 comprises a rod body 241 and a supporting rib 242, the rod body 241 coincides with the central line of the fixed valve ball 23, and the descaling ring 25 is arranged on the rod body 241 through the supporting rib 242. The lower end of the descaling ring 25 is provided with a sharp knife edge, and the lower end of the descaling ring 25 is located below the stationary valve 20 when in use. The projection area of the descaling ring 25 is larger than that of the fixed valve ball 23, and the spherical surface of the fixed valve ball 23 is contacted with the E end of the ejector rod 24.
Further, when the fixed valve 20 is closed, the F end face of the ejector rod 24 is located on the same plane as the D end face of the embedded valve cover 26, and when the fixed valve 20 is opened, the F end face of the ejector rod 24 protrudes out of the D end face of the embedded valve cover 26, and the protruding height is equal to the jump height of the fixed valve ball 23.
When the fixed valve 20 is used, the D end of the embedded valve cover 26 faces upwards and the C end faces downwards, and when the oil pump is in an up stroke, the plunger assembly starts to move upwards, the fixed valve ball 23 is opened under the pressure of sinking, oil enters the pump cavity, and the jump height of the fixed valve ball 23 is equal to the height of the outer end face of the end of the ejector rod 24F protruding out of the D end of the embedded valve cover 26. When the oil pump is in the down stroke, the plunger assembly is changed from up to down, the fixed valve 20 stops feeding liquid, and the ejector rod 24 pushes the fixed valve ball 23 to be closed in advance under the action of the elastic force of the telescopic piece 27.
When sand sedimentation and wax precipitation phenomena are serious in the fixed valve 20, and the fixed valve ball 23 cannot be completely closed in place, the plunger assembly can be lowered to form a bump pump, the lower end surface of the lower part of the plunger assembly presses the part of the ejector rod 24 protruding out of the outer end surface of the end of the embedded valve cover 26D, the fixed valve ball 23 is mechanically pushed to be completely closed, meanwhile, the scale removal ring 25 on the ejector rod 24 can scrape accumulated sand and wax precipitation in the embedded valve cover 26, and when the pump is opened again, the accumulated sand and wax precipitation are discharged out of the pump along with suction liquid, so that the functions of sand removal and wax breaking are completed.
The fixed valve 20 adopts a structure that a compression spring (a telescopic piece 27) is added with a jacking rod 24, the elasticity of the compression spring is smaller than 0.5kg, but when the fixed valve ball 23 is opened, the fixed valve ball 23 pushes the jacking rod 24 to enable the end of the jacking rod 24F to protrude out of the outer end face of the embedded valve cover 26D, if the phenomenon that wax deposition and sand accumulation block the fixed valve ball 23 occurs, pump bumping operation can be performed (namely, a sucker rod column is lowered, the lower end face of a plunger assembly is contacted with the outer end face of the embedded valve cover 26D), and thousands of kilograms of pressure generated by the sucker rod column is used for pushing the jacking rod 24 and the descaling ring 25 to easily and completely break wax and clean sand.
As shown in fig. 10, a forced-closing anti-seize oil pump, which uses the above-mentioned traveling valve 10 and fixed valve 20, includes a pump cylinder assembly 30 and a plunger assembly 40, the plunger assembly 40 being sleeved in the pump cylinder assembly 30.
The pump cylinder assembly 30 includes an upper coupling 31, a pump cylinder 32, a lower coupling 33, and a stationary valve 20, which are sequentially connected from top to bottom.
The plunger assembly 40 includes an oil outlet joint 41, an upper traveling valve 101, an upper traveling valve joint 42, a plunger 43, a lower traveling valve joint 44, a lower traveling valve 102 and an oil inlet joint 45, which are connected in this order from top to bottom. The upper traveling valve 101 and the lower traveling valve 102 are the traveling valve 10 having the same structure.
When the forced closing anti-seize oil pump is in the upward stroke, at the lower starting point, the plunger assembly 40 starts to move upwards, the suction liquid in the oil pipe on the pump flows reversely, the instant linear velocity of the fluid is greatly increased through the conical flow passage of the moving valve core 12 with the cone angle Y, jet flow is generated, the moving valve ball 13 is ejected and impacted, the moving valve ball 13 is pushed to close in advance, at the moment, the fixed valve ball 23 is opened under the pressure of sinking degree, and the oil liquid enters the pump cavity.
When the forced closing anti-seize oil pump downstroke is started, the plunger assembly 40 is changed from up to down, the fixed valve 20 stops feeding liquid, the ejector rod 24 pushes the fixed valve ball 23 to close in advance under the action of the elastic force of the telescopic piece 27, at the moment, the pressure in the pump cavity is increased, the traveling valve balls 13 in the lower traveling valve 102 and the upper traveling valve 101 are sequentially jacked up, and oil enters the pump upper oil pipe through the inner channel of the plunger assembly 40.
When sand sedimentation and wax precipitation phenomena are serious in the fixed valve 20, and the fixed valve ball 23 cannot be completely closed in place, the plunger assembly 40 can be lowered to form a bump pump, the lower end surface of the oil inlet joint 45 at the lower part of the plunger assembly 40 presses the part of the ejector rod 24 protruding out of the outer end surface of the D end of the embedded valve cover 26, the fixed valve ball 23 is mechanically pushed to be completely closed, meanwhile, the scale removal ring 25 on the ejector rod 24 scrapes off sand accumulation and wax precipitation in the embedded valve cover 26, and when the pump is opened again, the scraped sand accumulation and wax precipitation are discharged out of the pump along with suction liquid, so that the sand removal and wax breaking functions are completed.
The forced closing anti-seize oil pump has forced closing and anti-seize functions, the liquid generates jet flow action by increasing the instantaneous linear velocity of the fluid, the traveling valve 10 is forced to be closed by the reverse jet flow impact of the suction liquid, so that a spring mechanism is not needed to be additionally arranged, a flow passage is free and smooth, the flow resistance loss is small, the closing action is reliable and is not easy to fail, the forced closing anti-seize oil pump forces the fixed valve 20 to be closed by the elastic force of the ejector rod 24 instead of being completely completed by the free falling of the fixed valve ball 23, meanwhile, the mechanical sand and wax removing function is added, the hidden danger that the fixed valve ball 23 is blocked and cannot be closed is eliminated, and the leakage is reduced.
The forced closing anti-seize oil pump provided by the invention uses the traveling valve 10 and the fixed valve 20, has forced closing and anti-seize functions, can effectively improve the pump efficiency of the oil pump in a highly-inclined well and a horizontal well, prolongs the service life and greatly reduces the exploitation cost.
While the invention has been described in terms of preferred embodiments, it will be understood that the invention is not limited thereto, but rather, it will be apparent to those skilled in the art that various changes and modifications can be made without departing from the scope of the invention.
Claims (2)
1. The forced-closing anti-seize oil well pump is characterized by comprising a pump barrel assembly (30), wherein the pump barrel assembly (30) comprises an upper coupling (31), a pump barrel (32), a lower coupling (33) and a fixed valve (20) which are sequentially connected from top to bottom, a plunger assembly (40), the plunger assembly (40) comprises an oil outlet joint (41), an upper traveling valve (101), an upper traveling valve joint (42), a plunger (43), a lower traveling valve joint (44), a lower traveling valve (102) and an oil inlet joint (45) which are sequentially connected from top to bottom, the upper traveling valve (101) and the lower traveling valve (102) are traveling valves (10) with the same structure, and the plunger assembly (40) is sleeved in the pump barrel assembly (30);
the traveling valve (10) comprises a traveling valve cover (11), a traveling valve core (12) and a traveling valve seat (14) which are arranged in the traveling valve cover (11) side by side, wherein the traveling valve core (12) comprises an A section and a B section, the A section is arranged adjacent to the traveling valve seat (14), the B section is arranged away from the traveling valve seat (14), a gap is reserved between the A section of the traveling valve core (12) and the traveling valve seat (14), and a traveling valve ball (13) is movably arranged in the A section of the traveling valve core (12), the B section of the traveling valve core (12) is provided with a conical flow passage with a large outside and a small inside from outside to inside, and the cone angle of the conical flow passage is 8-15 degrees;
The fixed valve (20) comprises a fixed valve joint (21), an embedded valve cover (26) and a fixed valve seat (22) which are arranged in the fixed valve joint (21) side by side, wherein two ends of the embedded valve cover (26) are respectively a C end and a D end, the C end is arranged adjacent to the fixed valve seat (22), the D end is arranged away from the fixed valve seat (22), the C end of the embedded valve cover (26) is abutted to the fixed valve seat (22), an overflow hole penetrating through the D end face of the embedded valve cover (26) is arranged on the embedded valve cover (26), a fixed valve ball (23) which is movably arranged in an overflow cavity of the embedded valve cover (26), and a push rod (24) which is slidably arranged through the D end face of the embedded valve cover (26), two ends of the push rod (24) are respectively an E end and an F end, the E end is arranged adjacent to the fixed valve seat (22), the F end is arranged away from the fixed valve seat (22), the E end of the push rod (24) is provided with a scale removing ring (25), the fixed ball (23) is arranged between the scale removing ring (25) and the embedded valve cover (26) and the inner end face (27) is arranged between the scale removing ring (27) and the inner end face (27);
When the fixed valve (20) is closed, the end face of the F end of the ejector rod (24) and the outer end face of the D end of the embedded valve cover (26) are positioned on the same plane;
when sand grains deposit and wax deposit in the fixed valve, the plunger assembly is lowered to form a bump pump, the lower end surface of the lower part of the plunger assembly presses the part of the ejector rod protruding out of the outer end surface of the D end of the embedded valve cover, the fixed valve ball is mechanically pushed to be completely closed, meanwhile, the scale removing ring on the ejector rod scrapes off the accumulated sand and the wax deposit in the embedded valve cover, and when the pump is opened again, the accumulated sand and the wax deposit are discharged out of the pump along with suction liquid, so that the functions of sand removal and wax breaking are completed.
2. The forced-closing anti-seize oil well pump according to claim 1, characterized in that the ejector rod (24) comprises a rod body (241) and supporting ribs (242), the descaling ring (25) is arranged on the rod body (241) through the supporting ribs (242), a sharp knife edge is arranged at the end part of the descaling ring (25), and the projection area of the descaling ring (25) is larger than that of the fixed valve ball (23).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010325925.9A CN111535779B (en) | 2020-04-23 | 2020-04-23 | Traveling valve and forced closing of anti-stuck oil pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010325925.9A CN111535779B (en) | 2020-04-23 | 2020-04-23 | Traveling valve and forced closing of anti-stuck oil pump |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111535779A CN111535779A (en) | 2020-08-14 |
| CN111535779B true CN111535779B (en) | 2025-03-11 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010325925.9A Active CN111535779B (en) | 2020-04-23 | 2020-04-23 | Traveling valve and forced closing of anti-stuck oil pump |
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| Country | Link |
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| CN (1) | CN111535779B (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN87210695U (en) * | 1987-11-02 | 1988-11-16 | 辽河石油勘探局曙光采油厂 | Pressurized type deep-well pump |
| CN202157942U (en) * | 2011-07-15 | 2012-03-07 | 中国石油天然气股份有限公司 | Double-moving oil outlet valve pipe type oil pump |
| CN203702514U (en) * | 2014-02-13 | 2014-07-09 | 陕西延长石油(集团)有限责任公司研究院 | Paraffin blocking prevention oil well pump |
| CN108953124A (en) * | 2018-08-07 | 2018-12-07 | 青岛理工大学 | Coal-bed gas well low-submergence coal dust-prevention drainage pump |
| CN212774227U (en) * | 2020-04-23 | 2021-03-23 | 河南福侨石油装备有限公司 | Traveling valve and forced-closing anti-blocking oil well pump |
-
2020
- 2020-04-23 CN CN202010325925.9A patent/CN111535779B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN87210695U (en) * | 1987-11-02 | 1988-11-16 | 辽河石油勘探局曙光采油厂 | Pressurized type deep-well pump |
| CN202157942U (en) * | 2011-07-15 | 2012-03-07 | 中国石油天然气股份有限公司 | Double-moving oil outlet valve pipe type oil pump |
| CN203702514U (en) * | 2014-02-13 | 2014-07-09 | 陕西延长石油(集团)有限责任公司研究院 | Paraffin blocking prevention oil well pump |
| CN108953124A (en) * | 2018-08-07 | 2018-12-07 | 青岛理工大学 | Coal-bed gas well low-submergence coal dust-prevention drainage pump |
| CN212774227U (en) * | 2020-04-23 | 2021-03-23 | 河南福侨石油装备有限公司 | Traveling valve and forced-closing anti-blocking oil well pump |
Also Published As
| Publication number | Publication date |
|---|---|
| CN111535779A (en) | 2020-08-14 |
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