CN112227967B - Sucker rod coupling - Google Patents
Sucker rod coupling Download PDFInfo
- Publication number
- CN112227967B CN112227967B CN202011169236.XA CN202011169236A CN112227967B CN 112227967 B CN112227967 B CN 112227967B CN 202011169236 A CN202011169236 A CN 202011169236A CN 112227967 B CN112227967 B CN 112227967B
- Authority
- CN
- China
- Prior art keywords
- rod
- boss
- sucker rod
- coupling
- cavity
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 230000008878 coupling Effects 0.000 title claims abstract description 68
- 238000010168 coupling process Methods 0.000 title claims abstract description 68
- 238000005859 coupling reaction Methods 0.000 title claims abstract description 68
- 239000000872 buffer Substances 0.000 claims abstract description 65
- 238000009434 installation Methods 0.000 claims abstract description 27
- 238000007789 sealing Methods 0.000 claims description 27
- 238000000034 method Methods 0.000 description 6
- 210000000078 claw Anatomy 0.000 description 5
- 230000001174 ascending effect Effects 0.000 description 4
- 238000000605 extraction Methods 0.000 description 4
- 230000033001 locomotion Effects 0.000 description 4
- 230000000295 complement effect Effects 0.000 description 2
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000002035 prolonged effect Effects 0.000 description 2
- 238000005086 pumping Methods 0.000 description 2
- 238000006467 substitution reaction Methods 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000003129 oil well Substances 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
Images
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
- E21B17/02—Couplings; joints
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)
- Mutual Connection Of Rods And Tubes (AREA)
- Shafts, Cranks, Connecting Bars, And Related Bearings (AREA)
Abstract
The invention provides a sucker rod coupling in the technical field of sucker rod connection, which comprises a coupling body with a containing cavity, wherein a buffer rod is connected in the coupling body in a sliding manner, a limiting step is arranged on the coupling body, a limiting boss is arranged on the buffer rod and can be abutted against the limiting step, an installation cavity is formed in the buffer rod on the outward side of the limiting boss, internal threads are formed in the buffer rod where the installation cavity is located, a spring is sleeved on the buffer rod on the inward side of the limiting boss, one end of the coupling body is connected with a connecting rod extending into the containing cavity, external threads are formed on the connecting rod, one end of the spring is connected to the buffer rod, the other end of the spring is connected to the connecting rod, a sliding cavity is formed in the connecting rod, the buffer rod extends into the sliding cavity and is connected with the connecting rod in a sliding manner, a through hole is formed in the buffer rod, and the sliding cavity is communicated with the installation cavity through the through hole; the sucker rod is not easy to damage, the use cost is low, and the working efficiency is high.
Description
Technical Field
The invention belongs to the technical field of sucker rod connection, and particularly relates to a sucker rod coupling.
Background
The sucker rod pumping well is an important tool in the process of oil field exploitation, the sucker rod is a slender rod piece of the pumping well, the sucker rod is connected with a polished rod, the oil well pump is connected with the polished rod in a downward mode to play a role in power transmission, and 80% of underground oil fields are distributed in a shallow layer (<2000 m) and a middle deep layer (2000 m-3500 m) in a concentrated mode, so that connection and connection of a plurality of sucker rods can be achieved only by a large number of sucker rod couplings, and therefore the sucker rod coupling with good comprehensive performance has important significance to the oil exploitation industry.
In the chinese patent database, a patent named "coupling for rod", having application publication No. 20170322, patent application publication No. CN 106536771 a, is disclosed, the device comprising a first rod and a second rod, each rod comprising an end having a pin, wherein the pin has an external thread; and a collar comprising a core having a first end and a second end, each end comprising an internal thread; wherein the internal threads of the first end of the collar are complementary to the external threads of the first rod and the internal threads of the second end of the collar are complementary to the external threads of the second rod; the device is at the oil recovery in-process, and the sucker rod need carry out reciprocating motion from top to bottom on the direction of height, and at the reciprocating motion in-process, can receive very big impact stress between each sucker rod, and then causes the fracture damage of sucker rod or sucker rod coupling, and life is short, and the damage of sucker rod in the whole device need replace whole sucker rod, and is with high costs, influences production, and work efficiency is low.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to overcome the defects in the prior art, solve the technical problems of easy damage and high use cost of the sucker rod in the prior art, and provide the sucker rod coupling.
The purpose of the invention is realized as follows: a sucker rod coupling comprises a coupling body with a containing cavity, a buffer rod is connected in the coupling body in a sliding way, the coupling body is provided with a limiting step, the buffer rod is provided with a limiting boss which can be abutted against the limiting step, the buffer rod at the outward side of the limiting boss is provided with an installation cavity, the buffer rod at the installation cavity is provided with internal threads, the buffer rod at the inward side of the limiting boss is sleeved with a spring, one end of the coupling body is connected with a connecting rod extending into the accommodating cavity, the connecting rod is provided with external threads, one end of the spring is connected with the buffer rod, the other end of the spring is connected with the connecting rod, the connecting rod is provided with a sliding cavity, the buffer rod stretches into the sliding cavity and is connected with the connecting rod in a sliding mode, a through hole is formed in the buffer rod, and the sliding cavity is communicated with the installation cavity through the through hole.
When the invention is connected with a sucker rod, one end of the upper sucker rod is screwed into the mounting cavity to lead the sucker rod to be in threaded connection with the internal thread of the buffer rod, then the lower sucker rod is in threaded connection with the external thread of the connecting rod to realize the connection of two sucker rods, and so on, the steps are repeated, the sucker rods are mutually connected according to the requirement of oil extraction depth to realize the connection of a plurality of sucker rods, when the oil extraction is carried out, the upper sucker rod is upwards moved by the pulling force, the upper sucker rod pulls the buffer rod, the buffer rod upwards moves along the accommodating cavity, the spring is stretched, the instantaneous pulling force of the upper sucker rod is buffered by the stretching of the spring, when the limit boss is abutted against the limit step, the coupling body starts to upwards move, the coupling body drives the connecting rod, the connecting rod drives the lower sucker rod to upwards move, and the ascending movement of a plurality of sucker rods is realized, when the sucker rod moves downwards, the upper sucker rod pushes the buffer rod downwards, the buffer rod moves downwards along the accommodating cavity, meanwhile, the buffer rod also moves downwards along the sliding cavity, the spring is compressed, the connecting rod is stressed, the connecting rod drives the lower sucker rod to move downwards, the compression of the spring buffers the instantaneous impact force of the upper sucker rod, and when the sucker rod descends to the set position, the restoring force of the spring drives the buffer rod to return to the initial position; in the process of ascending and descending of the sucker rod, the sucker rods are mutually pulled and impacted, and the buffer rod, the spring and the connecting rod are jointly arranged to buffer the sucker rod, so that a buffer space is formed among the coupling body, the buffer rod and the connecting rod, the sucker rod is prevented from being damaged, the service life of the sucker rod is prolonged, the use cost is low, and the sucker rod connecting tool can be applied to connecting the sucker rods.
When the female connection in order to realize sucker rod and buffer beam, further fixed sucker rod, the other end of coupling body is equipped with coupling assembling, coupling assembling includes the sliding sleeve of suit on the coupling body, the outside one end of sliding sleeve is equipped with the sliding sleeve boss that extends towards installation cavity place direction, it has the fluting to open on the sliding sleeve, it has the fixed orifices that is linked together with the fluting to open on the coupling body, and the fixed orifices internal connection has the fixing bolt who is used for fixed sliding sleeve.
In order to enable the sliding sleeve to firmly lock the sucker rod, the groove comprises a sliding groove extending along the axial direction of the coupling body, a fixing groove communicated with the sliding groove is formed in the inward side of the sliding groove, and the fixing groove is perpendicular to the sliding groove.
In order to prevent the sucker rod from falling off from the buffer rod, at least two clamping jaws are arranged between the sliding sleeve and the coupling body, one end of each clamping jaw is provided with a clamping jaw boss extending towards the direction of the installation cavity, the clamping jaw on the outward side of each clamping jaw boss is provided with a connecting groove, the coupling body is provided with a connecting boss matched with the connecting groove, and when the connecting boss is clamped into the connecting groove, the clamping jaw boss is abutted against the connecting boss; the other end of jack catch is equipped with the joint that extends towards the installation cavity place direction, still is equipped with the draw-in groove on the jack catch between joint and the spread groove, but the joint of sliding sleeve boss joint is in the draw-in groove, and when sucker rod and buffer beam internal thread connection, the sucker rod is lived to the joint, and the sliding sleeve boss crosses the joint and locks the joint.
In order to prevent the sucker rod from falling off from the connecting rod, one end of the coupling body, which is close to the connecting rod, is provided with a connecting cavity, the connecting cavity is connected with a connecting sleeve, the sucker rod is connected between the connecting rod and the connecting sleeve, and a plurality of elastic clamping teeth extending towards the direction of the connecting rod are arranged at the outward end of the connecting sleeve.
In order to realize sealing, install sealing washer one in the installation cavity, be equipped with the trompil that is linked together with the through-hole on the sealing washer, sealing washer one end inwards is equipped with sealed protruding circle, still opens on the buffer beam at installation cavity place with sealed protruding circle matched with joint groove.
In order to realize sealing, a sealing groove is formed in the connecting rod extending into the accommodating cavity, and a second sealing ring is connected in the sealing groove.
In order to facilitate the connection rod to be screwed into the accommodating cavity, the end part of the outward side of the connection rod is provided with a connector used for being screwed into the accommodating cavity.
Drawings
Fig. 1 is a front view of the present invention.
Fig. 2 is a right side view of the present invention.
Fig. 3 is a view from a-a of fig. 2.
Fig. 4 is a first perspective view of the present invention.
Fig. 5 is a second perspective view of the present invention.
FIG. 6 is a schematic view of the structure of the sucker rod of the present invention.
In the figure: 1 coupling body, 101 holds the chamber, 102 spacing rank, 103 fixed orificess, 104 connects the boss, 105 connects the chamber, 2 bumper posts, 201 spacing boss, 202 installation cavity, 203 internal thread, 204 through-hole, 205 joint groove, 3 springs, 4 connecting rods, 401 sliding chamber, 402 seal groove, 403 external screw thread, 5 coupling assembling, 501 sliding sleeve, 501a sliding sleeve boss, 501b sliding groove, 501c fixed slot, 6 fixing bolt, 7 jack catches, 701 jack catch boss, spread groove 702, 703 joint, 704 draw-in groove, 8 adapter sleeve 801, elasticity latch, 9 sealing washer one, 901 sealing flange, 10 sealing washer two, 11 connectors, 12, 1201 extend the boss, 1202 external connecting thread, 1203 internal connecting thread.
Detailed Description
The invention will be further described with reference to the accompanying drawings.
A sucker rod coupling as shown in fig. 1-6, which comprises a coupling body 1 with a containing cavity 101, wherein a buffer rod 2 is slidably connected in the coupling body 1, a limiting step 102 is arranged on the coupling body 1, a limiting boss 201 is arranged on the buffer rod 2, the limiting boss 201 can abut against the limiting step 102, an installation cavity 202 is formed on the buffer rod 2 at one outward side of the limiting boss 201, a first sealing ring 9 is installed in the installation cavity 202, an opening communicated with a through hole 204 is formed in the sealing ring, a sealing convex ring 901 is arranged at one inward end of the first sealing ring 9, and a clamping groove 205 matched with the sealing convex ring 901 is further formed in the buffer rod 2 where the installation cavity 202 is located; an internal thread 203 is arranged on a buffer rod 2 where the installation cavity 202 is located, a spring 3 is sleeved on the buffer rod 2 on the inward side of the limiting boss 201, one end of the coupling body 1 is connected with a connecting rod 4 extending into the accommodating cavity 101, an external thread 403 is arranged on the connecting rod 4, one end of the spring 3 is connected to the buffer rod 2, the other end of the spring 3 is connected to the connecting rod 4, a sliding cavity 401 is formed in the connecting rod 4, the buffer rod 2 extends into the sliding cavity 401 and is connected with the connecting rod 4 in a sliding mode, a through hole 204 is formed in the buffer rod 2, and the sliding cavity 401 is communicated with the installation cavity 202 through the through hole 204; the other end of the coupling body 1 is provided with a connecting assembly 5, the connecting assembly 5 comprises a sliding sleeve 501 sleeved on the coupling body 1, one outward end of the sliding sleeve 501 is provided with a sliding sleeve boss 501a extending towards the direction of the installation cavity 202, the sliding sleeve 501 is provided with a slot, the coupling body 1 is provided with a fixing hole 103 communicated with the slot, the fixing hole 103 is internally connected with a fixing bolt 6 for fixing the sliding sleeve 501, the slot comprises a sliding groove 501b extending along the axial direction of the coupling body 1, one inward side of the sliding groove 501b is provided with a fixing groove 501c communicated with the sliding groove 501b, and the fixing groove 501c is perpendicular to the sliding groove 501 b; at least two clamping jaws 7 are arranged between the sliding sleeve 501 and the coupling body 1, one end of each clamping jaw 7 is provided with a clamping jaw boss 701 extending towards the direction of the installation cavity 202, the clamping jaw 7 on the outward side of each clamping jaw boss 701 is provided with a connecting groove 702, the coupling body 1 is provided with a connecting boss 104 matched with the connecting groove 702, and when the connecting boss 104 is clamped into the connecting groove 702, the clamping jaw bosses 701 are abutted against the connecting bosses 104; the other end of the claw 7 is provided with a clamping joint 703 extending towards the direction of the installation cavity 202, a clamping groove 704 is further arranged on the claw 7 between the clamping joint 703 and the connecting groove 702, a sliding sleeve boss 501a can be clamped in the clamping groove 704, when the sucker rod is connected with the internal thread 203 of the buffer rod 2, the clamping joint 703 is clamped by the clamping joint 703, and the sliding sleeve boss 501a crosses the clamping joint 703 to lock the clamping joint 703; one end of the coupling body 1 close to the connecting rod 4 is provided with a connecting cavity 105, a connecting sleeve 8 is connected in the connecting cavity 105, the sucker rod is connected between the connecting rod 4 and the connecting sleeve 8, and a plurality of elastic clamping teeth 801 extending towards the direction of the connecting rod 4 are arranged at the outward end of the connecting sleeve 8; a sealing groove 402 is formed in the connecting rod 4 extending into the accommodating cavity 101, and a second sealing ring 10 is connected in the sealing groove 402; the end part of the outward side of the connecting rod 4 is provided with a connector 11 which is screwed into the accommodating cavity 101; one end of the sucker rod is provided with an internal connecting thread 1203 matched with the external thread 403, the other end of the sucker rod is provided with an extension boss 1201 used for pushing the clamping joint 703, and the sucker rod on the outward side of the extension boss 1201 is provided with an external connecting thread 1202 matched with the internal thread 203.
In the initial state of the invention, the sliding sleeve boss 501a is clamped in the clamping groove 704, when the invention is connected with a sucker rod, one end of the sucker rod above is screwed into the installation cavity 202, the extending boss 1201 on the sucker rod pushes the clamping joint 703 to rotate inwards, after the external connecting thread 1202 of the sucker rod is in threaded fit with the internal thread 203 of the buffer rod 2, the clamping jaw 7 is in a horizontal state, just clamps the sucker rod, then the fixing bolt 6 is loosened, the sliding sleeve 501 is rotated outwards, the fixing bolt 6 slides along the sliding groove 501b and is clamped into the fixing groove 501c, the fixing bolt 6 is locked, the sliding sleeve 501 locks the clamping jaw 7 to realize the connection of the sucker rod above, then one end with the internal connecting thread 1203 below is screwed into the connection cavity 105, the sucker rod pushes the elastic clamping tooth 801 to deform inwards, the internal connecting thread is in threaded connection with the external thread 403 of the connecting rod 4 to realize the connection of two sucker rods, analogizing in sequence, repeating the steps, enabling all the sucker rods to be connected with each other according to the requirement of the oil extraction depth, realizing the connection of a plurality of sucker rods, when the oil extraction is carried out, the upper sucker rod moves upwards under the action of tensile force, the upper sucker rod pulls the buffer rod 2, the buffer rod 2 moves upwards along the containing cavity 101, the spring 3 stretches, the instantaneous tensile force of the upper sucker rod is buffered by the stretching of the spring 3, when the limit boss 201 is abutted to the limit step 102, the coupling body 1 starts to move upwards, the coupling body 1 drives the connecting rod 4, the connecting rod 4 drives the lower sucker rod to move upwards, realizing the ascending movement of a plurality of sucker rods, when the sucker rod ascends to a set position, the buffer rod 2 is driven by the restoring force of the spring 3 to return to an initial position, in the process that the sucker rod bears the tensile force, the claw 7 firmly fastens the sucker rod above the claw 7, the claw 7 is further locked by the sliding sleeve 501, the double-layer anti-falling safety is formed, so that the sucker rod above is connected more firmly, the sucker rod below is prevented from falling by the meshing action of the elastic latch 801, the sucker rod below is connected more firmly, when the sucker rod above moves downwards, the sucker rod above pushes the buffer rod 2 downwards, the buffer rod 2 moves downwards along the accommodating cavity 101, meanwhile, the buffer rod 2 also moves downwards along the sliding cavity 401, the spring 3 is compressed, the connecting rod 4 is stressed, the connecting rod 4 drives the sucker rod below to move downwards, the compression of the spring 3 buffers the instantaneous impact force of the sucker rod above, and when the sucker rod descends to a set position, the restoring force of the spring 3 drives the buffer rod 2 to return to an initial position; in the process of ascending and descending of the sucker rod, the sucker rods are mutually pulled and impacted, and the buffer rod 2, the spring 3 and the connecting rod 4 are jointly arranged to buffer the sucker rod, so that a buffer space is formed among the coupling body 1, the buffer rod 2 and the connecting rod 4, the sucker rod is prevented from being damaged, the service life of the sucker rod is prolonged, and the use cost is low; the clamping jaw 7, the sliding sleeve 501 and the connecting sleeve 8 are arranged, so that the sucker rod can be prevented from falling off, the sucker rod is connected more firmly, the use is convenient, the structure is reliable, and the connecting tool can be applied to the connecting tool of the sucker rod.
The present invention is not limited to the above embodiments, and based on the technical solutions disclosed in the present invention, those skilled in the art can make some substitutions and modifications to some technical features without creative efforts based on the disclosed technical solutions, and these substitutions and modifications are all within the protection scope of the present invention.
Claims (8)
1. A sucker rod coupling is characterized in that: the coupling comprises a coupling body with a containing cavity, a buffer rod is connected in the coupling body in a sliding manner, a limiting step is arranged on the coupling body, a limiting boss is arranged on the buffer rod and can abut against the limiting step, an installation cavity is formed in the buffer rod on one side, outwards, of the limiting boss, an internal thread is formed in the buffer rod where the installation cavity is located, a spring is sleeved on the buffer rod on one side, inwards, of the limiting boss, one end of the coupling body is connected with a connecting rod extending into the containing cavity, an external thread is formed in the connecting rod, one end of the spring is connected to the buffer rod, the other end of the spring is connected to the connecting rod, a sliding cavity is formed in the connecting rod, the buffer rod extends into the sliding cavity and is connected with the connecting rod in a sliding manner, a through hole is formed in the buffer rod, the sliding cavity is communicated with the installation cavity through the through hole, and a connecting assembly is arranged at the other end of the coupling body, coupling assembling includes the slip cap of suit on the coupling body, be equipped with two at least jack catchs between slip cap and the coupling body.
2. The sucker rod coupling of claim 1, wherein: the outside one end of sliding sleeve is equipped with the sliding sleeve boss that extends towards the installation cavity place direction, it has the fluting to open on the sliding sleeve, it has the fixed orifices that is linked together with the fluting to open on the coupling body, and the fixed orifices internal connection has the fixing bolt who is used for fixed sliding sleeve.
3. The sucker rod coupling of claim 2, wherein: the fluting includes the sliding tray that extends along coupling body axial direction, the sliding tray is equipped with the fixed slot that communicates with the sliding tray towards inside one side, the fixed slot sets up with the sliding tray is perpendicular.
4. The sucker rod coupling of claim 3, wherein: one end of the jaw is provided with a jaw boss extending towards the direction of the installation cavity, the jaw on the outward side of the jaw boss is provided with a connecting groove, the coupling body is provided with a connecting boss matched with the connecting groove, and when the connecting boss is clamped into the connecting groove, the jaw boss is abutted against the connecting boss; the other end of jack catch is equipped with the joint that extends towards the installation cavity place direction, still is equipped with the draw-in groove on the jack catch between joint and the spread groove, but the joint of sliding sleeve boss joint is in the draw-in groove, and when sucker rod and buffer beam female connection, the sucker rod was lived to the joint, and the sliding sleeve boss crosses the joint and locks the sucker rod.
5. The sucker rod coupling of claim 1, wherein: the coupling body is close to the one end of connecting rod and opens there is the connecting chamber, the connecting intracavity is connected with the adapter sleeve, and the sucker rod is connected between connecting rod and adapter sleeve, the outside one end of adapter sleeve is arranged a plurality of and is extended to the direction at connecting rod place.
6. The sucker rod coupling of claim 5, wherein: the mounting cavity is internally provided with a first sealing ring, the first sealing ring is provided with an opening communicated with the through hole, one inward end of the first sealing ring is provided with a convex sealing ring, and a clamping groove matched with the convex sealing ring is further formed in the buffer rod where the mounting cavity is located.
7. The sucker rod coupling of claim 6, wherein: the connecting rod extending into the accommodating cavity is provided with a sealing groove, and a sealing ring II is connected in the sealing groove.
8. The sucker rod coupling according to any one of claims 1 to 7, wherein: the end part of the outward side of the connecting rod is provided with a connector used for being screwed into the accommodating cavity.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011169236.XA CN112227967B (en) | 2020-10-28 | 2020-10-28 | Sucker rod coupling |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011169236.XA CN112227967B (en) | 2020-10-28 | 2020-10-28 | Sucker rod coupling |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112227967A CN112227967A (en) | 2021-01-15 |
| CN112227967B true CN112227967B (en) | 2022-07-05 |
Family
ID=74109059
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011169236.XA Active CN112227967B (en) | 2020-10-28 | 2020-10-28 | Sucker rod coupling |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112227967B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113107385B (en) * | 2021-05-06 | 2021-11-09 | 大庆市龙兴石油机械有限公司 | Tubing coupling |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8083008B2 (en) * | 2004-08-20 | 2011-12-27 | Sdg, Llc | Pressure pulse fracturing system |
| GB2477357A (en) * | 2010-02-02 | 2011-08-03 | Subsea 7 Ltd | Clamp and fitting apparatus for pipe, cable or other elongate element |
| CN203008805U (en) * | 2012-12-25 | 2013-06-19 | 孙继辉 | Antiwear anticorrosion device of hollow sucker rod |
| CN111119752A (en) * | 2020-03-02 | 2020-05-08 | 石磊 | Sucker rod for ground oil extraction machinery and assembling method thereof |
-
2020
- 2020-10-28 CN CN202011169236.XA patent/CN112227967B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN112227967A (en) | 2021-01-15 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN112227967B (en) | Sucker rod coupling | |
| CN209868428U (en) | Bolt fastening gun head | |
| CN112483012A (en) | Anti-drop and anti-tensile sucker rod coupling | |
| CN111306166A (en) | Single-head automatic locking type connecting assembly | |
| CN214011581U (en) | Pull ring unlocking structure of optical module | |
| CN212265723U (en) | Spring assembly and disassembly tools and be used for spring tool equipment device that hydraulic jet drilled | |
| CN112227963B (en) | Anti-torsion sucker rod | |
| CN211501168U (en) | Pure-step hydraulic multistage lifting type oil cylinder | |
| CN215804457U (en) | Plunger trapping apparatus for drainage gas recovery | |
| CN2444051Y (en) | Turning type disconnecting device | |
| CN213352326U (en) | Multifunctional oil production machine maintenance tool | |
| CN201326535Y (en) | Double-plunger suspended anti-airlock oil pump | |
| CN220646351U (en) | Lock structure suitable for pneumatic lifting rod | |
| CN220726206U (en) | Well repair drill rod joint | |
| CN201106411Y (en) | Connector for sucker rod | |
| CN2426915Y (en) | Float collar and float shoe | |
| CN212898396U (en) | Hydraulic spring double-cylinder bidirectional jarring accelerator | |
| CN2249820Y (en) | Gripper for lifting suction rod | |
| CN211208856U (en) | Long-life carbon brush for washing machine | |
| CN214337326U (en) | Spring compression type resetting thimble | |
| CN202249838U (en) | Anti-drop mechanical clamp type rope cap capable of realizing rapid replacement | |
| CN209223959U (en) | A kind of double cylinder double acting diaphragm pump Jie bar locking apparatus | |
| CN2361825Y (en) | Releasing device | |
| CN217951637U (en) | Plunger type stopper magnetic lifting hook | |
| CN213135745U (en) | Automatic hook pressing mechanism |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |