CN110173220A - A kind of linkage mechanism driving friction pulley by oil pumping polish rod on tubing spinner - Google Patents
A kind of linkage mechanism driving friction pulley by oil pumping polish rod on tubing spinner Download PDFInfo
- Publication number
- CN110173220A CN110173220A CN201910607120.0A CN201910607120A CN110173220A CN 110173220 A CN110173220 A CN 110173220A CN 201910607120 A CN201910607120 A CN 201910607120A CN 110173220 A CN110173220 A CN 110173220A
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- Prior art keywords
- oil pumping
- pumping polish
- polish rod
- friction pulley
- rod
- Prior art date
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- 238000005086 pumping Methods 0.000 title claims abstract description 55
- 230000007246 mechanism Effects 0.000 title claims abstract description 38
- 230000005540 biological transmission Effects 0.000 claims abstract description 47
- NJPPVKZQTLUDBO-UHFFFAOYSA-N novaluron Chemical compound C1=C(Cl)C(OC(F)(F)C(OC(F)(F)F)F)=CC=C1NC(=O)NC(=O)C1=C(F)C=CC=C1F NJPPVKZQTLUDBO-UHFFFAOYSA-N 0.000 claims abstract description 17
- 238000007789 sealing Methods 0.000 claims description 10
- 238000009434 installation Methods 0.000 claims description 7
- 230000033001 locomotion Effects 0.000 claims description 7
- 238000012545 processing Methods 0.000 claims description 2
- 238000010586 diagram Methods 0.000 description 6
- 241000237858 Gastropoda Species 0.000 description 3
- 230000007812 deficiency Effects 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000008450 motivation Effects 0.000 description 2
- 239000003129 oil well Substances 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 208000002925 dental caries Diseases 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 238000009987 spinning Methods 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B17/00—Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Cables; Casings; Tubings
- E21B17/10—Wear protectors; Centralising devices, e.g. stabilisers
- E21B17/1085—Wear protectors; Blast joints; Hard facing
Landscapes
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- General Details Of Gearings (AREA)
Abstract
The invention discloses a kind of on tubing spinner by the linkage mechanism of oil pumping polish rod driving friction pulley, it is arranged between the worm screw and oil pumping polish rod on tubing spinner, the tubing spinner includes the internal pedestal for forming cavity, the cavity connects oil pick-up tube by the hanger mandrel in hanger seat, the oil pumping polish rod to move up and down is equipped in the oil pick-up tube, worm gear is equipped with above the hanger mandrel, match with worm gear and is driven setting worm screw, it is characterized by comprising the transmission components connecting with worm-drive, the friction wheel assembly connected by gear drive is equipped on transmission component, rub against one another power between the friction wheel assembly and the oil pumping polish rod.The present invention is able to solve the shortcomings of the prior art, solves the problems, such as oil pick-up tube eccentric wear by using built-in passive type structure, prolongs its service life.
Description
Technical field
The present invention relates to a kind of on tubing spinner by the linkage mechanism of oil pumping polish rod driving friction pulley.
Background technique
The oil pick-up tube eccentric wear of oil well causes the worn out failure of oil pipe to be the big serious problems in Petroleum Production, every year due to oil
Pipe abrasion causes fixed output quota to be overhauled, and the loss for replacing oil pipe is huge.Last century the eighties are proposed by U.S. R&M Energy
Anti- eccentric wear solution fundamentally solves this problem.The anti-eccentric wearing device in the external standard configuration for also becoming oil well, but
China there is no configuration, can only need more to spend thus from foreign procurement, can not long-run development, limited everywhere
System.In addition the anti-eccentric wearing device of R&M Energy drives oil pipe to slowly run with pole using external impetus, overall structure
Complexity, manufacture is cumbersome, at high cost, so the present inventor, which just mentions, has been proposed patent application, application No. is
CN2018100776472 during moving up and down by oil pumping polish rod, drives connecting rod or more by the damper on oil pumping polish rod
Activity, and by the rotation of worm and gear drive oil pick-up tube, and then solve the problems, such as oil pick-up tube eccentric wear.
Since the setting of damper is there are certain deficiency, setting and installation there are certain trouble, have it is many not
Just, so proposing further improvement on the basis of the present inventor is original herein, a connection on tubing spinner is designed
Motivation structure, to meet the needs of existing market.
Summary of the invention
The technical problem to be solved by the present invention is to overcome the existing defects, provides a kind of be used on tubing spinner by pumping
Polished rod drives the linkage mechanism of friction pulley, and delicate structure solves the problems, such as oil pick-up tube eccentric wear, and the service life is longer for entire oil pipe
Long.
In order to solve the above-mentioned technical problems, the present invention provides the following technical solutions:
A kind of linkage mechanism driving friction pulley by oil pumping polish rod on tubing spinner, is arranged in the snail on tubing spinner
Between bar and oil pumping polish rod, the tubing spinner includes the internal pedestal for forming cavity, and the cavity passes through in hanger seat
Hanger mandrel connect oil pick-up tube, the oil pumping polish rod to move up and down is equipped in the oil pick-up tube, on the hanger mandrel
Side is equipped with worm gear, matches transmission setting worm screw with worm gear, it is characterised in that: including the transmission component being connect with worm-drive,
Transmission component is equipped with the friction wheel assembly that connects by gear drive, between the friction wheel assembly and the oil pumping polish rod that
This generates frictional force.
The present invention is done further preferably, the friction wheel assembly includes the friction pulley being in contact with each other with oil pumping polish rod, with
And it is used to support the friction wheel support of friction pulley, it is set between the back-moving spring block of the friction wheel support and connection on the base
There is spring assembly, the spring assembly, which is realized, generates frictional force between friction pulley and oil pumping polish rod；The friction wheel support and biography
Train of reduction gears is equipped between dynamic component.
The present invention is done further preferably, wherein the mandrel both ends being located among the friction pulley are bearing, one of them
For unilateral bearing, when sucker rod moves upwards, unilateral bearing locks mandrel, drives linkage mechanism rotation.
The present invention is done further preferably, forms the first installation cavity for installing friction pulley on the friction wheel support,
And form the second installation cavity for installing train of reduction gears.
The present invention is done further preferably, the spring assembly includes 2 spring parts being symmetrical set, the spring
Part includes the stay hook being fixed on friction wheel support, the adjusting rod being fixed on back-moving spring block, and the one of the adjusting rod
End forms hook portion, and adjusting nut is equipped between the other end and back-moving spring block of the adjusting rod；In the stay hook and institute
It states and is equipped with adjustment spring between adjusting rod hook portion, in the fixed fixation hole on the base of the back-moving spring block.
The present invention is done further preferably, the pulling force of the adjustment spring is F, oil pumping oil pipe be multiple-tubing string each other by
Tubing thread is threadedly coupled to be formed, wherein tubing thread maximum permissible torque T(N.M), the daily turnning circle n(rpd of oil pipe), light of pumping
Bar movement length L(MM), it pumps beat rhy (beat/min), is driven gross efficiency η, the coefficient of friction ξ of friction pulley and oil pumping polish rod,
Relationship between spring tension F in this way and tubing thread screw thread peak torque are as follows: F≤1/2 (π T n)/L rhy η ξ.
The present invention is done further preferably, the transmission component includes the first transmission mechanism and second being sequentially connected each other
Transmission mechanism, is sequentially connected wherein the second transmission mechanism and worm screw match, and is equipped on first transmission mechanism and oil pumping light
What bar was in contact is connect by train of reduction gears with frictional wheel drive.
The present invention is done further preferably, first transmission mechanism includes the first drive rod, and and train of reduction gears
Match the transmission gear being sequentially connected, and the transmission gear is fixed on the first drive rod；
One end of first drive rod is fixed on base body and is attached fixation by bearing each other, and described
It is equipped with sealing cover between the other end and pedestal of one drive rod, is formed in the sealing cover and is led to for what the first drive rod passed through
Hole, the other end of first drive rod pass through through-hole and extend to outside pedestal and form worm screw portion in the end, and described the
It is equipped with bearing between one drive rod and sealing cover through-hole, a mechanical seal is equipped on the inside of bearing and is sealed processing.
The present invention is done further preferably, first drive rod passes through the axis hole that friction wheel support is formed, each other
Equipped with bearing, realize that friction wheel support is free to rotate.
The present invention is done further preferably, second transmission mechanism includes fixed worm seat on the base, the snail
Pole socket is equipped with rotatable second worm screw, and second worm screw matches with the second worm gear for being located at worm end to be sequentially connected,
Second worm screw is equipped with third worm gear and the matching of worm screw portion is sequentially connected；The second worm screw other end end passes through bearing
It is arranged on rotator pedestal.
Compared with prior art, the beneficial effects obtained by the present invention are as follows being:
The present invention in actual use, due to pushing down between friction pulley and oil pumping polish rod by spring, generates normal pressure, and
Frictional force is generated in polished rod motion, in this way when oil pumping polish rod moves up and down, will drive the rotation of friction pulley, and is rubbed
The rotation of wheel can carry out power by train of reduction gears and be transferred on the first drive rod, by the first drive rod and the second worm screw it
Between power transmission each other, power is transferred to worm and wormwheel, realizes that the hanger mandrel on rotator is carried out together with oil pick-up tube
Rotation, and then solve the problems, such as oil pipe eccentric wear, the service life is longer for entire sucker rod long.
When oil pumping polish rod up and down motion average speed is 4.5m/s, when friction pulley and polished rod are without opposite sliding, friction pulley
Revolving speed be 516 revs/min.We also need the power for obtaining 5-7W on the first drive rod to work as power according to T=9550P/n
When for 5W, theoretical torque 0.093Nm, friction pulley radius is 12.5, so need to obtain 7.44N, i.e. the frictional force of 0.76KG,
Similarly, it is 0.13Nm, the i.e. frictional force of 1.06KG that the power of 7W, which needs torque, is existed in the prior art so the present invention can solve
Deficiency and problem, be conducive to long-run development.
From the foregoing, it will be observed that the present invention is able to solve the shortcomings of the prior art, it is inclined to solve oil pick-up tube for delicate structure
The problem of mill, the service life is longer for entire sucker rod long.
Detailed description of the invention
Attached drawing is used to provide further understanding of the present invention, and constitutes part of specification, with reality of the invention
It applies example to be used to explain the present invention together, not be construed as limiting the invention.
In the accompanying drawings:
Fig. 1 is schematic diagram of the invention.
Fig. 2 is schematic internal view of the invention.
Fig. 3 is schematic internal view of the invention.
Fig. 4 is the partial schematic diagram in the present invention between the first transmission mechanism and friction wheel support.
Fig. 5 is the schematic diagram of the first transmission bar part in the present invention.
Fig. 6 is the schematic diagram of the second transmission bar part in the present invention.
Fig. 7 is the schematic diagram of friction wheel support in the present invention.
Fig. 8 is the schematic diagram that bar part is adjusted in the present invention.
Specific embodiment
Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings, it should be understood that preferred reality described herein
Apply example only for the purpose of illustrating and explaining the present invention and is not intended to limit the present invention.
As shown in figures 1-8, the invention discloses a kind of on tubing spinner by the connection of oil pumping polish rod driving friction pulley
Motivation structure is arranged between the worm screw 2 on tubing spinner 1 and oil pumping polish rod 3, and the tubing spinner 1 includes internal formed
The pedestal 5 of cavity, the cavity connect oil pick-up tube 4 by the hanger mandrel in hanger seat, are equipped in the oil pick-up tube 4 upper
The oil pumping polish rod 3 of lower movement is equipped with worm gear above the hanger mandrel, matches with worm gear and is driven setting worm screw 2, feature
It is: including the transmission component being sequentially connected with worm screw 2, the friction wheel assembly being sequentially connected each other is equipped on transmission component,
Rub against one another power between the friction wheel assembly and the oil pumping polish rod.The present invention in actual use, due to rubbing
It wipes and is pushed down between wheel and oil pumping polish rod by spring, generate normal pressure, and generate frictional force in polished rod motion, work as oil pumping in this way
When polished rod moves up and down, the rotation of friction pulley will drive, and the rotation of friction pulley can carry out power by train of reduction gears
It is transferred on the first drive rod, by the power transmission each other between the first drive rod and the second worm screw, power is transferred to snail
Worm and wormwheel realizes that the hanger mandrel on rotator is rotated together with oil pick-up tube, and then solves the problems, such as oil pipe eccentric wear, whole
The service life is longer for a sucker rod long.
Heretofore described friction wheel assembly includes the friction pulley 10 being in contact with each other with oil pumping polish rod 3, and is used to support
The friction wheel support 11 of friction pulley 10 is equipped between the friction wheel support 11 and the back-moving spring block being connected on pedestal 5
Spring assembly, the spring assembly, which is realized, generates frictional force between friction pulley 10 and oil pumping polish rod 3；The friction wheel support 11 with
Train of reduction gears 12 is equipped between transmission component, wherein the mandrel both ends being located among the friction pulley 10 are bearing, wherein one
A is unilateral bearing 13, and when sucker rod moves upwards, unilateral bearing locks mandrel, drives linkage mechanism rotation, the friction pulley
Form the first installation cavity 111 for installing friction pulley 10 on bracket 11, and formed for installing train of reduction gears 12 the
Two installation cavitys 112, the spring assembly include 2 spring parts being symmetrical set, and the spring part includes being fixed on friction
One end of stay hook 13 on wheel support, the adjusting rod 14 being fixed on back-moving spring block, the adjusting rod 14 forms hook portion
16, adjusting nut 19 is equipped between the other end and back-moving spring block 17 of the adjusting rod 14；In the stay hook 13 and institute
It states and is equipped with adjustment spring 18 between 14 hook portion 16 of adjusting rod, the back-moving spring block 17 is fixed on the fixation hole 6 on pedestal 5
It is interior, the seal plug 15 of sealing is equipped on the fixation hole 6.The present invention passes through the design of adjusting nut 19, realizes friction
Certain frictional force is kept between wheel 10 and oil pumping polish rod 3, it is ensured that the rotation of friction pulley and the service life of entirety are more long
Long, when needing to adjust, as long as seal plug is removed, then the adjusting nut in fixation hole is adjusted,
Integrated operation is very convenient.
In addition, the selection about the weight range of adjustment spring in the present invention is extremely important, if without suitable pulling force,
Just cannot achieve good coordinating operation between adjustment spring and friction pulley, will lead to adjust oil pick-up tube can not normally orderly rotation
Turn, so the selection of adjustment spring weight range is very crucial, the present invention is repeatedly selected and tested to this, and is combined
The circle number that oil pipe needs to rotate daily, tubing thread maximum permissible torque T(N.M), oil pumping polish rod movement length L(MM), oil pumping section
It claps rhy (beat/min), is driven gross efficiency η, the coefficient of friction ξ of friction pulley and oil pumping polish rod obtains adjustment spring pulling force F and oil pipe
Detain the relationship between screw thread peak torque are as follows: F≤1/2 (π T n)/L rhy η ξ.Adjustment spring pulling force in the present invention
Its design of the related similarly suitable screw pump tubing spinning of mathematical formulae.
Transmission component of the present invention includes the first transmission mechanism and the second transmission mechanism being sequentially connected each other, wherein the
Two transmission mechanisms and worm screw 2, which match, to be sequentially connected, and is equipped on first transmission mechanism and passes through with what oil pumping polish rod 3 was in contact
Train of reduction gears 12 and friction pulley 10 are sequentially connected, and first transmission mechanism includes the first transmission across friction wheel support 11
Bar 21 is arranged between first drive rod 21 and the friction wheel support 11 by bearing activity, in first drive rod
21 are equipped with the transmission gear 22 for the transmission connection that matches with train of reduction gears 12, one end of first drive rod 21 and pedestal 5
Between by live bearing be arranged, between the other end 21 and pedestal 5 of first drive rod be equipped with sealing cover 24, the sealing
The through-hole passed through for the first drive rod 21 is formed in lid 24, the other end of first drive rod 21 passes through through-hole and extends to
Worm screw portion 23 is formed outside pedestal 5 and in the end, is led in 23 inside of worm screw portion and on the first drive rod 21 with sealing cover 24
It is equipped with live bearing 25 between hole, a mechanical seal 26 is equipped on the inside of live bearing.
Heretofore described first drive rod 21 passes through the axis hole 113 that friction wheel support 11 is formed, and is equipped with axis each other
It holds, realizes that friction wheel support 11 is free to rotate.
Heretofore described second transmission mechanism includes the worm seat 30 being fixed on pedestal 5, is set on the worm seat 30
There is rotatable second worm screw 31, forms worm gear part 32 and 34 phase of the second worm gear for being located at worm end in second worm screw 31
With transmission connection, second worm screw 31 is equipped with third worm gear 33 and the matching of worm screw portion 23 is sequentially connected；Second worm screw
31 other end ends are arranged on pedestal 5 by bearing.
Finally, it should be noted that the foregoing is only a preferred embodiment of the present invention, it is not intended to restrict the invention,
Although the present invention is described in detail referring to the foregoing embodiments, for those skilled in the art, still may be used
To modify the technical solutions described in the foregoing embodiments or equivalent replacement of some of the technical features.
All within the spirits and principles of the present invention, any modification, equivalent replacement, improvement, such as will by a friction pulley
The kinetic energy of polished rod is transmitted on friction pulley, is transmitted to worm screw by multi-stage speed-reducing and is realized that oil pipe rotation etc. should be included in the present invention
Protection scope within.
Claims (10)
1. a kind of linkage mechanism for driving friction pulley by oil pumping polish rod on tubing spinner, is arranged on tubing spinner
Between worm screw and oil pumping polish rod, the tubing spinner includes the internal pedestal for forming cavity, and the cavity passes through hanger seat
Interior hanger mandrel connects oil pick-up tube, the oil pumping polish rod to move up and down is equipped in the oil pick-up tube, in the hanger mandrel
Top is equipped with worm gear, matches transmission setting worm screw with worm gear, it is characterised in that: including the transmission component being connect with worm-drive,
The friction wheel assembly connected by gear drive is equipped on transmission component, between the friction wheel assembly and the oil pumping polish rod
Rub against one another power.
2. a kind of linkage mechanism for driving friction pulley by oil pumping polish rod on tubing spinner according to claim 1,
It is characterized by: the friction wheel assembly includes the friction pulley being in contact with each other with oil pumping polish rod, and it is used to support friction pulley
Friction wheel support is equipped with spring assembly, the bullet between the friction wheel support and connection back-moving spring block on the base
Spring component, which is realized, generates frictional force between friction pulley and oil pumping polish rod；It is equipped with and slows down between the friction wheel support and transmission component
Gear set.
3. a kind of linkage mechanism for driving friction pulley by oil pumping polish rod on tubing spinner according to claim 2,
It is characterized by: the mandrel both ends being wherein located among the friction pulley are bearing, one of them is unilateral bearing, works as sucker rod
It moves upwards, unilateral bearing locks mandrel, drives linkage mechanism rotation.
4. a kind of linkage mechanism for driving friction pulley by oil pumping polish rod on tubing spinner according to claim 2,
It is characterized by: forming the first installation cavity for installing friction pulley on the friction wheel support, and is formed and subtracted for installing
Second installation cavity of fast gear set.
5. a kind of linkage mechanism for driving friction pulley by oil pumping polish rod on tubing spinner according to claim 2,
It is characterized by: the spring assembly includes 2 spring parts being symmetrical set, the spring part includes being fixed on friction pulley
One end of stay hook on bracket, the adjusting rod being fixed on back-moving spring block, the adjusting rod forms hook portion, the adjusting
Adjusting nut is equipped between the other end and back-moving spring block of bar；It is equipped between the stay hook and the adjusting rod hook portion
Adjustment spring, the back-moving spring block are fixed in fixation hole on the base.
6. a kind of linkage mechanism for driving friction pulley by oil pumping polish rod on tubing spinner according to claim 5,
It is characterized by: the pulling force of the adjustment spring is F, oil pumping oil pipe is multiple-tubing string each other by tubing thread threaded connection shape
At wherein tubing thread maximum permissible torque T(N.M), the daily turnning circle n(rpd of oil pipe), oil pumping polish rod movement length L(MM),
It pumps beat rhy (beat/min), is driven gross efficiency η, the coefficient of friction ξ, such spring tension F and oil of friction pulley and oil pumping polish rod
Relationship between pipe thread screw thread peak torque are as follows: F≤1/2 (π T n)/L rhy η ξ.
7. a kind of linkage mechanism for driving friction pulley by oil pumping polish rod on tubing spinner according to claim 1,
It is characterized by: the transmission component includes the first transmission mechanism and the second transmission mechanism being sequentially connected each other, wherein second
Transmission mechanism and worm screw, which match, to be sequentially connected, and passes through deceleration equipped with what is be in contact with oil pumping polish rod on first transmission mechanism
Gear set is connect with frictional wheel drive.
8. a kind of linkage mechanism for driving friction pulley by oil pumping polish rod on tubing spinner according to claim 7,
It is characterized by: first transmission mechanism includes the first drive rod, and the transmission with train of reduction gears matching transmission connection
Gear, the transmission gear are fixed on the first drive rod；
One end of first drive rod is fixed on base body and is attached fixation by bearing each other, and described
It is equipped with sealing cover between the other end and pedestal of one drive rod, is formed in the sealing cover and is led to for what the first drive rod passed through
Hole, the other end of first drive rod pass through through-hole and extend to outside pedestal and form worm screw portion in the end, and described the
It is equipped with bearing between one drive rod and sealing cover through-hole, a mechanical seal is equipped on the inside of bearing and is sealed processing.
9. a kind of linkage mechanism for driving friction pulley by oil pumping polish rod on tubing spinner according to claim 8,
It is characterized by: first drive rod passes through the axis hole that friction wheel support is formed, it is equipped with bearing each other, realizes friction pulley
Bracket is free to rotate.
10. a kind of linkage mechanism for driving friction pulley by oil pumping polish rod on tubing spinner according to claim 7,
It is characterized by: second transmission mechanism includes fixed worm seat on the base, the worm seat is equipped with rotatable
Second worm screw, second worm screw matches with the second worm gear for being located at worm end to be sequentially connected, and second worm screw is equipped with
Third worm gear and worm screw portion, which match, to be sequentially connected；The second worm screw other end end is arranged by bearing in rotator pedestal
On.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910607120.0A CN110173220A (en) | 2019-07-06 | 2019-07-06 | A kind of linkage mechanism driving friction pulley by oil pumping polish rod on tubing spinner |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910607120.0A CN110173220A (en) | 2019-07-06 | 2019-07-06 | A kind of linkage mechanism driving friction pulley by oil pumping polish rod on tubing spinner |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110173220A true CN110173220A (en) | 2019-08-27 |
Family
ID=67699863
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910607120.0A Pending CN110173220A (en) | 2019-07-06 | 2019-07-06 | A kind of linkage mechanism driving friction pulley by oil pumping polish rod on tubing spinner |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110173220A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110644933A (en) * | 2019-10-25 | 2020-01-03 | 左入林 | Sucker rod and casing with oil pipe traction device |
-
2019
- 2019-07-06 CN CN201910607120.0A patent/CN110173220A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110644933A (en) * | 2019-10-25 | 2020-01-03 | 左入林 | Sucker rod and casing with oil pipe traction device |
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