CN212376629U - Underground dynamic sealing device of ultra-long stroke oil pumping unit - Google Patents
Underground dynamic sealing device of ultra-long stroke oil pumping unit Download PDFInfo
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- CN212376629U CN212376629U CN202021452462.4U CN202021452462U CN212376629U CN 212376629 U CN212376629 U CN 212376629U CN 202021452462 U CN202021452462 U CN 202021452462U CN 212376629 U CN212376629 U CN 212376629U
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Abstract
The utility model discloses a dynamic sealing device in pit of overlength stroke beam-pumping unit, including interior working barrel, outer working barrel and oil pipe cross, wherein outer working barrel cover is established on the working barrel including, be formed with annular channel between the inner wall of outer working barrel and the outer wall of interior working barrel, the top of working barrel and outer working barrel including oil pipe cross cover is established, annular channel between interior working barrel and the outer working barrel is linked together with the infusion passageway of oil pipe cross side, the intracavity of interior working barrel is provided with first plunger, the top of first plunger is connected with wire rope, wire rope is connected with the hoisting device on ground after passing the interior working barrel in the oil pipe cross center channel. Has the advantages that: the output torque of the speed reducer is reduced by 27%. The safety factor can reach 4.26. The cost per meter is only 2/3 of the existing equipment which uses the steel wire rope as the sucker rod. The utility model provides a dynamic sealing device in pit of overlength stroke beam-pumping unit is applied to overlength stroke beam-pumping unit development deep well and well deep well more than 12 types and becomes probably.
Description
Technical Field
The utility model relates to a dynamic seal device in pit, in particular to dynamic seal device in pit of overlength stroke beam-pumping unit.
Background
At present, in the development and production of oil fields, the mechanical oil extraction of a sucker rod pump accounts for more than 98% of the total number of wells of the oil field, all the mechanical oil extraction mode of the sucker rod pump is connected with ground mechanical oil extraction equipment and an underground sucker rod through a polished sucker rod or a flexible polished sucker rod, and the sealing of a well mouth is ensured through a polished rod sealer of the oil extraction well mouth no matter what kind of polished rod is adopted at present. Especially, the flexible sucker rod of the steel wire rope is mature day by day, and lays a foundation for the oil extraction process technology with the ultra-long stroke (more than or equal to 15m), the prior oil pumping unit with the ultra-long stroke related to the patent numbers CN201230127009.0 and 201420750926.8 popularized and applied in oil fields and mines uses the flexible sucker rod of the steel wire rope with the same structure type, the sucker rod adopts a single steel wire and a single steel wire strand, the inner gap of the steel wire rope is completely filled with the composite material during weaving, and the outer layer of the steel wire rope main body is integrally coated with the sucker rod of the steel wire rope made of the wear-resistant composite material by adopting a special process, and the maximum outer diameter. Its characteristics are that wire rope inner structure is inseparable, and the outside is smooth, can adopt well head sealing. The breaking tension of the 30mm steel wire rope sucker rod is only 200KN (the same diameter petroleum compaction strand steel wire rope reaches 776KN), so that the problems are caused that firstly, the machine type of the over-stroke oil pumping machine can only reach 8-type oil pumping machines, and the development of the ultra-long stroke oil extraction technology is severely restricted; secondly, the safe use coefficient is low, the safety coefficient of the 8-type pumping unit is only 2.5, and the requirement of the safe use coefficient of the 8-type pumping unit is far lower than that of a steel wire rope by 4-5 times; and the price of a 30mm steel wire rope sucker rod per meter is 72 yuan, the product in the two patents is used for 100 meters in a single well, the field application result proves that the service life of the wellhead-sealed steel wire rope sucker rod is only one year, the service life of a sealing packing is 2 months, and the oil extraction production cost and the labor intensity of field operators are greatly increased.
Disclosure of Invention
The utility model aims at solving the problem that the breaking force that wire rope exists as the oil pumping polished rod in the use is low, the safety risk is high, the well head seals life is short to restrict the application of overlength stroke oil recovery technique scale and provide an overlength stroke beam-pumping unit developments sealing device in pit.
The utility model provides a dynamic sealing device in pit of overlength stroke beam-pumping unit is including interior working barrel, outer working barrel and oil pipe cross, wherein outer working barrel cover is established on the working barrel including, be formed with annular channel between the inner wall of outer working barrel and the outer wall of interior working barrel, the top of working barrel and outer working barrel including oil pipe cross cover is established, annular channel between interior working barrel and the outer working barrel is linked together with the infusion passageway of oil pipe cross side, the intracavity of interior working barrel is provided with first plunger, the top of first plunger is connected with wire rope, wire rope is connected with the hoisting device on ground after passing the interior working barrel in the oil pipe cross center passageway.
The upper part of the outer working barrel is provided with a sleeve four-way joint at the lower part of the oil pipe four-way joint, and an upper flange at the top end of the sleeve four-way joint is fixedly connected with a lower flange at the bottom of the oil pipe four-way joint.
An oil pipe hanger is arranged in the oil pipe cross joint, a liquid outlet is formed in the side face of the oil pipe hanger, the liquid outlet in the side face of the oil pipe hanger is communicated with a liquid conveying channel in the side edge of the oil pipe cross joint, the upper end and the lower end of the oil pipe hanger are sealed, the upper end of the inner working barrel is connected with a suspension joint, a lower flange on the suspension joint is fixedly connected with an upper flange of the oil pipe cross joint, a hanger is arranged in the suspension joint and concentrically and hermetically suspended with the oil pipe hanger, a blowout prevention gate is connected to the upper flange at the top end of the suspension joint, an anti-static box is assembled on the upper portion of the blowout prevention gate, and a steel wire rope passing through the central channel of.
The bottom end of the outer working barrel is provided with a positioning fluid director, the positioning fluid director consists of an outer pipe and an inner pipe, the outer pipe is sleeved on the inner pipe, the outer diameter of the outer pipe corresponds to the outer diameter of the outer working barrel, the outer diameter of the inner pipe corresponds to the outer diameter of the inner working barrel, a channel formed between the inner wall of the outer pipe and the outer wall of the inner pipe is communicated with an annular channel between the outer working barrel and the inner working barrel, the inner working barrel is communicated with a central channel of the positioning fluid director, the lower part of the positioning fluid director is sequentially connected with an oil pipe and an oil pump barrel, and the bottom of the oil pump.
The connector is arranged between the lower end of the steel wire rope and the top of the first plunger in the inner cavity of the inner working barrel and comprises an upper cone body and a lower cone body, wedge-shaped dies are arranged in the upper cone body and the lower cone body, the upper cone body and the lower cone body are connected through a connector, the top of the upper cone body is provided with a locking pressing cap, the bottom of the lower cone body is provided with a pressing connector, the locking pressing cap and the pressing connector tightly clamp the steel wire rope on the wedge-shaped dies in the upper cone body and the lower cone body, the pressing connector is fixedly connected with the first plunger, the lower portion of the first plunger is connected with a second plunger, the lower portion of the second plunger is connected with a third plunger through a sucker rod, the third plunger is assembled in the inner cavity of the oil well pump barrel, and.
The utility model discloses an installation and theory of operation:
the installation principle is as follows:
the first step is as follows: firstly, the four-way casing pipe is connected to the upper part of the casing pipe head on the oil well ground through screw threads, and then the lower flange of the four-way oil pipe is connected with the upper flange of the four-way casing pipe through bolts.
The second step is that: the oil production pipe column is put into the oil well, and the oil production pipe column is put into the oil well in the following sequence:
firstly, the oil pump cylinder is put in, the oil pipe, the positioning fluid director, the external working cylinder and the oil pipe hanger are connected in sequence, and the oil pipe hanger is hung on the oil pipe cross joint.
Thirdly, putting the oil production rod column into the oil well, wherein the sequence of putting the oil production rod column into the oil well is as follows: and firstly, a third plunger is put in, and the pump pull rod and the sucker rod are sequentially connected to the well head.
The fourth step: the suspension joint for installing the inner working barrel is connected with an upper flange of the oil pipe cross.
The fifth step: and (3) dynamic sealing in the well:
the bottom of the inner working barrel is inserted into the central channel of the positioning fluid director to realize positioning, and finally the top end of the inner working barrel is connected with a hanger in the hanging joint.
And a sixth step: connecting steel wire rope and underground sealing plunger
According to the stroke length of the underground oil well pump barrel, the part of the oil pumping rod which is larger than the stroke length is pulled out, the steel wire rope sequentially penetrates through the anti-static box and the blowout prevention gate and then is sequentially connected with the first plunger, the second plunger and the oil pumping rod through the inner cavity of the inner working barrel, and the steel wire rope is lowered to a proper depth after connection is completed, so that the installation of the double-pipe concentric hanging sealed Christmas tree and the double-pipe concentric underground sealed oil production pipe column is completely completed.
The working principle of the utility model is as follows:
the utility model provides a dynamic sealing device in pit of overlength stroke beam-pumping unit is connected through wire rope and first plunger, the second plunger, the sucker rod and third plunger, overlength stroke beam-pumping unit is through the steel wire when rope pulls first plunger and second plunger to do reciprocating motion in the inner chamber of interior working barrel in step, the third plunger is likewise in beam-pumping unit barrel and ground beam-pumping unit to do reciprocating motion from top to bottom, the valve that moves about in the third plunger closes when the beam-pumping unit upstroke, the fixed valve of beam-pumping unit bobbin base portion is opened, third plunger, second plunger and first plunger move upward together under wire rope's traction, the liquid in the oil pipe is lifted to location divertor department through the third plunger that moves upward, a part of liquid gets into the annular channel between outer working barrel and the interior working barrel through the location, then via oil pipe hanger and oil pipe final inflow oil well ground gathering pipeline, and another part of the liquid in the oil pipe reaching the positioning flow guider part travels into the inner working cylinder along with the first plunger and the second plunger, and the part of the liquid is sealed in the inner working cylinder under the sealing action of the first plunger and the second plunger.
When the oil pumping unit is in down stroke, the floating valve in the third plunger piston is opened, the fixed valve at the bottom of the oil well pump barrel is closed, the third plunger piston, the first plunger piston and the second plunger piston move downwards together under the traction of the steel wire rope, liquid in the oil pumping pump barrel enters the oil pipe through the floating valve in the third plunger piston, part of liquid entering the inner cavity of the inner working barrel during up stroke is discharged under the sealing action of the first plunger piston and the second plunger piston which move downwards, enters an annular channel between the outer working barrel and the inner working barrel through the positioning fluid director, and finally flows into an oil well ground gathering pipeline through an oil conveying channel on the side wall of the oil pipe hanger and the oil pipe four-way.
The pumping unit finishes the oil extraction production of the previous stroke cycle.
The utility model has the advantages that:
the utility model provides a super long stroke beam-pumping unit developments sealing device in pit has greatly reduced the manufacturing cost of super long stroke beam-pumping unit, and one of super long stroke beam-pumping unit mechanical part's core part is the speed reducer, and the big or small direct relation of speed reducer output torque is to the production manufacturing cost of speed reducer and other parts, to 8 types of beam-pumping units as an example, the rated load 80KN of 8 types of beam-pumping units, the biggest lifting load 120KN, use diameter 30mm breaking force 200KN wire rope as the oil pumping polished rod, cylinder diameter is 960mm at least, speed reducer rated output moment of torsion 57600 N.m, the utility model discloses in use diameter 20mm breaking force 341KN oil compaction thigh wire rope as the oil pumping polished rod, cylinder diameter reduces to 700mm, speed reducer rated output moment of torsion 42000 N.m, the output moment of torsion of the speed reducer has reduced 27.
The utility model provides a dynamic sealing device uses wire rope to make factor of safety show the improvement as the oil pumping polished rod in the pit of overlength stroke beam-pumping unit, calculates according to rated load the utility model provides a wire rope can reach 4.26 as the factor of safety of oil pumping polished rod, is greater than the standard that can only reach 2.5 as oil pumping polished rod factor of safety in the relevant equipment of present used far away.
The utility model provides a super long stroke beam-pumping unit dynamic seal device in pit has prolonged the life of oil pumping polished rod and has reduced oil well oil recovery production running cost, current wire rope sucker rod relies on the organic material of its surface parcel cover to seal as the sealed mode of oil pumping polished rod, and this kind of way sees through field application's data, and the fracture can appear more than 98% in the time of about one year of sealing material use on wire rope surface, has not satisfied well head sealing condition, so must change. The utility model provides a wire rope is as the oil pumping polished rod, and the sealed and wire rope of well head do not take place the relation, under the condition of equal service condition and beam-pumping unit swabbing parameter, the utility model provides a wire rope service life is more than 3 years at least, and per meter cost only has the 2/3 of wire rope as the sucker rod among the existing equipment.
The utility model provides a dynamic sealing device in pit of overlength stroke beam-pumping unit is applied to overlength stroke beam-pumping unit development deep well and well deep well more than 12 types and becomes probably.
Drawings
Fig. 1 is a schematic view of the overall structure of the dynamic sealing device of the present invention.
Fig. 2 is an enlarged structural section view of the upper part of the dynamic sealing device of the present invention.
Fig. 3 is an enlarged schematic view of the positioning fluid director of the present invention.
Fig. 4 is an enlarged schematic view of the connector of the present invention.
The labels in the above figures are as follows:
1. an inner working barrel 2, an outer working barrel 3, an oil pipe four-way joint 4, an annular channel 5 and a transfusion channel
6. First plunger 7, steel wire rope 8, sleeve four-way 9, tubing hanger 10 and suspension joint
11. Hanger 12, blowout prevention gate 13, anti-static box 14, positioning fluid director 15 and outer pipe
16. Inner pipe 17, channel 18, oil pipe 19, oil pump barrel 20 and fixed valve
21. Connector 22, upper cone 23, lower cone 24, connector 25 and locking press cap
26. A compression joint 27, a second plunger 28, a sucker rod 29, a third plunger 30 and a traveling valve.
Detailed Description
Please refer to fig. 1 to 4:
the utility model provides a dynamic sealing device in pit of overlength stroke beam-pumping unit is including interior working barrel 1, outer working barrel 2 and oil pipe cross 3, wherein outer working barrel 2 cover is established on working barrel 1 including, be formed with annular channel 4 between the inner wall of outer working barrel 2 and the outer wall of interior working barrel 1, working barrel 1 and outer working barrel 2's top including oil pipe cross 3 cover is established, annular channel 4 between interior working barrel 1 and the outer working barrel 2 is linked together with the infusion passageway 5 of 3 sides of oil pipe cross, be provided with first plunger 6 in the inner chamber of interior working barrel 1, the top of first plunger 6 is connected with wire rope 7, wire rope 7 is connected with the hoisting device on ground after passing interior working barrel 1 in the 3 central channel of oil pipe cross.
The upper part of the outer working barrel 2 is provided with a sleeve four-way joint 8 at the lower part of the oil pipe four-way joint 3, and an upper flange at the top end of the sleeve four-way joint 8 is fixedly connected with a lower flange at the bottom of the oil pipe four-way joint 3.
An oil pipe hanger 9 is arranged in the oil pipe cross 3, a liquid outlet is formed in the side face of the oil pipe hanger 9, the liquid outlet in the side face of the oil pipe hanger 9 is communicated with a liquid conveying channel 5 in the side face of the oil pipe cross 3, the upper end and the lower end of the oil pipe hanger 9 are sealed, a hanging joint 10 is connected to the upper end of the inner working barrel 1, a lower flange on the hanging joint 10 is fixedly connected with an upper flange of the oil pipe cross 3, a hanger 11 is arranged in the hanging joint 10, the hanger 11 and the oil pipe hanger 9 are concentrically and hermetically hung, a blowout prevention gate 12 is connected to the upper flange at the top end of the hanging joint 10, an anti-static box 13 is assembled on the upper portion of the blowout prevention gate 12, and a steel wire rope 7 passing through a central channel of the oil pipe cross.
The bottom end of the outer working barrel 2 is provided with a positioning fluid director 14, the positioning fluid director 14 consists of an outer pipe 15 and an inner pipe 16, the outer pipe 15 is sleeved on the inner pipe 16, the outer diameter of the outer pipe 15 corresponds to the outer diameter of the outer working barrel 2, the inner diameter of the inner pipe 16 corresponds to the outer diameter of the inner working barrel 1, a channel 17 formed between the inner wall of the outer pipe 15 and the outer wall of the inner pipe 16 is communicated with an annular channel 4 between the outer working barrel 2 and the inner working barrel 1, the inner working barrel 1 is communicated with a central channel of the positioning fluid director 14, the lower part of the positioning fluid director 14 is sequentially connected with an oil pipe 18 and an oil pump barrel 19, and the bottom of the oil pump.
A connector 21 is arranged between the lower end of the steel wire rope 7 and the top of the first plunger 6 in the inner cavity of the inner working barrel 1, the connector 21 comprises an upper cone 22 and a lower cone 23, wedge-shaped dies are arranged in the upper cone 22 and the lower cone 23, the upper cone 22 and the lower cone 23 are connected through a connector 24, a locking pressing cap 25 is arranged at the top of the upper cone 22, a pressing joint 26 is arranged at the bottom of the lower cone 23, the steel wire rope 7 is tightly clamped on the wedge-shaped dies in the upper cone 22 and the lower cone 23 through the locking pressing cap 25 and the pressing joint 26, the pressing joint 26 is fixedly connected with the first plunger 6, the lower part of the first plunger 6 is connected with a second plunger 27, the lower part of the second plunger 27 is connected with a third plunger 29 through a sucker rod 28, the third plunger 29 is assembled in the inner cavity of the oil-well pump barrel 19, and a traveling valve 30 is arranged on the.
The utility model discloses an installation and theory of operation:
the installation principle is as follows:
the first step is as follows: firstly, the sleeve four-way joint 8 is connected to the upper part of the oil well ground sleeve head through screw threads, and then the lower flange of the oil pipe four-way joint 3 is connected with the upper flange of the sleeve four-way joint 8 through bolts.
The second step is that: the oil production pipe column is put into the oil well, and the oil production pipe column is put into the oil well in the following sequence:
firstly, the oil pump barrel 19 is put in, and the oil pipe 18, the positioning fluid director 14, the outer working barrel 2 and the oil pipe hanger 9 are connected in sequence and hung on the oil pipe four-way joint 3.
Thirdly, putting the oil production rod column into the oil well, wherein the sequence of putting the oil production rod column into the oil well is as follows: the third plunger 29 is first lowered and the pump rod, sucker rod 28, are connected in sequence to the well head.
The fourth step: the suspension joint 10 for installing the inner working barrel 1 is connected with an upper flange of the oil pipe cross 3.
The fifth step: and (3) dynamic sealing in the well:
the inner working barrel 1 is inserted corresponding to the depth of the outer working barrel 2 going deep into the well, the lower end of the inner working barrel 1 is inserted into the central channel of the positioning fluid director 14 to realize positioning, and finally the top end of the inner working barrel 1 is connected with the hanger 11 in the hanging joint 10.
And a sixth step: connecting a steel wire rope 7 with the underground sealing plunger:
according to the stroke length of the underground oil well pump barrel 19, the part of the oil pumping rod 28 which is larger than the stroke length is drawn out, the steel wire rope 7 sequentially penetrates through the anti-static box 13 and the blowout prevention gate 12 and then is sequentially connected with the first plunger 6, the second plunger 27 and the oil pumping rod 28 through the inner cavity of the inner working barrel 1, and the steel wire rope is lowered to a proper depth after connection is completed, so that the installation of the double-pipe concentric hanging sealed Christmas tree and the double-pipe concentric underground sealed oil production pipe column is completely completed.
The working principle of the utility model is as follows:
the utility model provides a dynamic sealing device in pit of overlength stroke beam-pumping unit is connected with first plunger 6, second plunger 27, sucker rod 28 and third plunger 29 through wire rope 7, the overlength stroke beam-pumping unit is through wire rope 7 pull first plunger 6 and second plunger 27 do reciprocating motion in the inner chamber of interior working barrel 1 in step, while third plunger 29 does reciprocating motion in step with the ground beam-pumping unit in the same time in oil pump section of thick bamboo 19, the floating valve 30 in the third plunger 29 is closed when the beam-pumping unit upstroke, the fixed valve 20 of oil pump section of thick bamboo 19 bottom is opened, third plunger 29, first plunger 6 and second plunger 27 go upward together under the traction of wire rope 7, the liquid in oil pipe 18 is lifted to location divertor 14 department through the third plunger 29 that goes upward, a part of liquid gets into annular channel 4 between outer working barrel 2 and the interior working barrel 1 through location divertor 14, then finally flows into the oil well surface gathering pipeline through the tubing hanger 9 and the tubing four-way joint 3, and another part of the liquid in the tubing 18 reaches the position of the positioning fluid director 14 and then flows upwards into the inner working barrel 1 along with the first plunger 6 and the second plunger 27, and the part of the liquid is sealed in the inner working barrel 1 under the sealing action of the first plunger 6 and the second plunger 27.
When the pumping unit downstroke, the traveling valve 30 in the third plunger 29 is opened, the fixed valve 20 at the bottom of the oil well pump barrel 19 is closed, the third plunger 29, the first plunger 6 and the second plunger 27 move downwards together under the traction of the steel wire rope 7, liquid in the oil well pump barrel 19 enters the oil pipe 18 through the traveling valve 30 in the third plunger 29, and part of liquid entering the inner cavity of the inner working barrel 1 during upstroke is discharged under the sealing action of the descending first plunger 6 and the descending second plunger 27, enters the annular channel 4 between the outer working barrel 2 and the inner working barrel 1 through the positioning fluid director 14, and finally flows into the oil well ground gathering and transportation pipeline through the oil pipe hanger 9 and the oil transportation channel 5 on the side wall of the oil pipe four-way 3.
The pumping unit finishes the oil extraction production of the previous stroke cycle.
Claims (5)
1. The utility model provides a dynamic sealing device in pit of overlength stroke beam-pumping unit which characterized in that: the oil pipe four-way joint comprises an inner working barrel, an outer working barrel and an oil pipe four-way joint, wherein the outer working barrel is sleeved on the inner working barrel, an annular channel is formed between the inner wall of the outer working barrel and the outer wall of the inner working barrel, the oil pipe four-way joint is sleeved at the tops of the inner working barrel and the outer working barrel, the annular channel between the inner working barrel and the outer working barrel is communicated with a transfusion channel on the side face of the oil pipe four-way joint, a first plunger is arranged in an inner cavity of the inner working barrel, the top of the first plunger is connected with a steel wire rope, and the steel wire rope penetrates through the inner working barrel in the central channel of.
2. The downhole dynamic sealing device of the ultra-long stroke pumping unit according to claim 1, wherein: the upper part of the outer working barrel is provided with a sleeve four-way joint at the lower part of the oil pipe four-way joint, and an upper flange at the top end of the sleeve four-way joint is fixedly connected with a lower flange at the bottom of the oil pipe four-way joint.
3. The downhole dynamic sealing device of the ultra-long stroke pumping unit according to claim 1, wherein: the oil pipe four-way device is characterized in that an oil pipe hanger is arranged in the oil pipe four-way device, a liquid outlet is formed in the side face of the oil pipe hanger, the liquid outlet in the side face of the oil pipe hanger is communicated with a liquid conveying channel in the side edge of the oil pipe four-way device, the upper end and the lower end of the oil pipe hanger are sealed, the upper end of an inner working barrel is connected with a suspension joint, a lower flange on the suspension joint is fixedly connected with an upper flange of the oil pipe four-way device, a hanger is arranged in the suspension joint and concentrically and hermetically suspended with the oil pipe hanger, a blowout prevention gate is connected to the upper flange at the top end of the suspension joint, an anti-static box is assembled on the upper portion of the.
4. The downhole dynamic sealing device of the ultra-long stroke pumping unit according to claim 1, wherein: the bottom end of the outer working barrel is provided with a positioning fluid director, the positioning fluid director consists of an outer pipe and an inner pipe, the outer pipe is sleeved on the inner pipe, the outer diameter of the outer pipe corresponds to the outer diameter of the outer working barrel, the inner diameter of the inner pipe corresponds to the outer diameter of the inner working barrel, a channel formed between the inner wall of the outer pipe and the outer wall of the inner pipe is communicated with an annular channel between the outer working barrel and the inner working barrel, the inner working barrel is communicated with a central channel of the positioning fluid director, the lower part of the positioning fluid director is sequentially connected with an oil pipe and an oil pump barrel, and the bottom of the oil pump barrel is.
5. The downhole dynamic sealing device of the ultra-long stroke pumping unit according to claim 1 or 4, characterized in that: the connector is arranged between the lower end of the steel wire rope and the top of the first plunger in the inner cavity of the inner working barrel and comprises an upper cone body and a lower cone body, wedge-shaped dies are arranged in the upper cone body and the lower cone body, the upper cone body and the lower cone body are connected through a connector, the top of the upper cone body is provided with a locking pressing cap, the bottom of the lower cone body is provided with a pressing connector, the locking pressing cap and the pressing connector tightly clamp the steel wire rope on the wedge-shaped dies in the upper cone body and the lower cone body, the pressing connector is fixedly connected with the first plunger, the lower portion of the first plunger is connected with a second plunger, the lower portion of the second plunger is connected with a third plunger through a sucker rod, the third plunger is assembled in the inner cavity of the oil well pump barrel, and the third.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202021452462.4U CN212376629U (en) | 2020-07-22 | 2020-07-22 | Underground dynamic sealing device of ultra-long stroke oil pumping unit |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202021452462.4U CN212376629U (en) | 2020-07-22 | 2020-07-22 | Underground dynamic sealing device of ultra-long stroke oil pumping unit |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111663917A (en) * | 2020-07-22 | 2020-09-15 | 吕学民 | Underground dynamic sealing device of ultra-long stroke oil pumping unit |
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2020
- 2020-07-22 CN CN202021452462.4U patent/CN212376629U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111663917A (en) * | 2020-07-22 | 2020-09-15 | 吕学民 | Underground dynamic sealing device of ultra-long stroke oil pumping unit |
| CN111663917B (en) * | 2020-07-22 | 2023-10-03 | 梅河口市弘业无缝钢管有限公司 | Underground dynamic sealing device of ultra-long stroke pumping unit |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20220615 Address after: 135000 Jianguo Road, Meihekou City, Tonghua City, Jilin Province Patentee after: MEIHEKOU CITY XINGYE PRECISION STEEL TUBE CO.,LTD. Address before: No. 251, East Street, Meihekou City, Tonghua City, Jilin Province Patentee before: Lv Xuemin |
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| TR01 | Transfer of patent right |
Effective date of registration: 20230425 Address after: No. 251, East Street, Meihekou City, Tonghua City, Jilin Province Patentee after: Meihekou Hongye Seamless Steel Tube Co.,Ltd. Patentee after: MEIHEKOU CITY XINGYE PRECISION STEEL TUBE CO.,LTD. Address before: 135000 Jianguo Road, Meihekou City, Tonghua City, Jilin Province Patentee before: MEIHEKOU CITY XINGYE PRECISION STEEL TUBE CO.,LTD. |
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