CN108278091B - End-stop joint tightening device for cladding sucker rod - Google Patents
End-stop joint tightening device for cladding sucker rod Download PDFInfo
- Publication number
- CN108278091B CN108278091B CN201810276726.6A CN201810276726A CN108278091B CN 108278091 B CN108278091 B CN 108278091B CN 201810276726 A CN201810276726 A CN 201810276726A CN 108278091 B CN108278091 B CN 108278091B
- Authority
- CN
- China
- Prior art keywords
- screw thread
- joint
- thread
- clamp body
- rod
- 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
- 238000005253 cladding Methods 0.000 title claims abstract description 5
- 239000011248 coating agent Substances 0.000 claims abstract description 7
- 238000000576 coating method Methods 0.000 claims abstract description 7
- 238000005086 pumping Methods 0.000 abstract description 4
- 238000005260 corrosion Methods 0.000 description 9
- 230000008878 coupling Effects 0.000 description 9
- 238000010168 coupling process Methods 0.000 description 9
- 238000005859 coupling reaction Methods 0.000 description 9
- 230000007797 corrosion Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 229920001903 high density polyethylene Polymers 0.000 description 2
- 239000004700 high-density polyethylene Substances 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000003801 milling Methods 0.000 description 1
- 239000003129 oil well Substances 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
- E21B19/00—Handling rods, casings, tubes or the like outside the borehole, e.g. in the derrick; Apparatus for feeding the rods or cables
- E21B19/16—Connecting or disconnecting pipe couplings or joints
- E21B19/161—Connecting or disconnecting pipe couplings or joints using a wrench or a spinner adapted to engage a circular section of pipe
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)
- Earth Drilling (AREA)
Abstract
The end-stop joint tightening device for cladding pumping rod has a rod body with joint screw thread and locking screw thread, a stress eliminating slot is formed between the joint screw thread and the locking screw thread, an external shoulder is formed between the joint screw thread and the stress eliminating slot, the rod body is covered with an anticorrosive coating, the locking screw thread is connected with an end-stop joint, a back-up clamp body is provided with an internal screw thread, the internal screw thread is matched with the joint screw thread, the back-up clamp body is internally provided with a reducing section, the back-up clamp body is milled into two halves and is buckled on the joint screw thread, the internal screw thread is buckled with the joint screw thread, the reducing section is limited by the outer shoulder, so that the back-up clamp body cannot be withdrawn from the connector screw thread, the back-up clamp body is milled and opened into two halves to be buckled on the connector screw thread and then fixed into a whole, the locking screw thread is screwed with the connecting screw thread of the end-stop connector, after the end-stop connector is fastened with the locking screw thread, the internal screw thread on the back-up clamp body milled and opened into two halves can be disengaged from the connector screw thread, and the back-up clamp body can be detached from the rod body without rotating a tool, so that the assembly quality of the coated sucker rod can be ensured.
Description
Technical Field
The invention belongs to assembly equipment of a sucker rod for connecting an oil pump and a pumping unit in an oil pumping well of an oil field, and relates to a tool for assembling a coated sucker rod, in particular to a device for screwing a stop end joint of the coated sucker rod.
Background
In the oil pumping system of the oil field, the sucker rod is soaked in well liquid for working, and the well liquid contains corrosive medium which corrodes the sucker rod, so that the service life of the sucker rod string is short, the production period of the oil well is short, and the economic benefit is poor. In order to solve the problem, the oil field uses a material type anti-corrosion sucker rod, but the sucker rod is made of metal material, has limited anti-corrosion capability and cannot completely solve the problem of corrosion. Therefore, technicians designed a coated sucker rod, the rod body of the sucker rod is coated with an anti-corrosion layer made of high-density polyethylene, the surface of the rod body is not contacted with well fluid, the well fluid cannot corrode the sucker rod, the sucker rod is composed of a sucker rod coupling 7, a stop joint 2, a rod body 3 and an anti-corrosion layer 4, as shown in fig. 1, the lower end face of the sucker rod coupling 7 is contacted with the upper end face of the stop joint 6, so that the connecting threads of the sucker rod coupling 7 and the rod body 3 are locked, the connection is firm, and the sucker rod is not tripped. To achieve the locking of the connecting threads of the sucker rod coupling 7 and the head of the rod body 3, it is necessary to ensure that the connecting threads of the end stop joint 6 and the rod body 3 can be screwed. Because the anticorrosive coating 4 on the rod body 3 can not be used for pipe tongs, the head of the rod body 3 exposed outside the anticorrosive coating 4 can not be used for pipe tongs, therefore, the connecting threads of the end stop joint 6 and the rod body 3 can not be screwed up, so that the assembling of the coated sucker rod is difficult, the assembling quality can not be ensured, and the use of the coated sucker rod is affected.
Disclosure of Invention
The invention aims to design a tightening device for a stop joint of a coated sucker rod, which can fasten the stop joint of the coated sucker rod on the coated sucker rod, thereby laying a foundation for reliable connection of a sucker rod coupling and the coated sucker rod.
The purpose of the invention is realized in the following way: the utility model provides a cladding sucker rod's end-stop joint screw up device, includes end-stop joint, body of rod, anticorrosive coating, has joint screw thread, locking screw thread on the body of rod, joint screw thread, locking screw thread revolve to the same, joint screw thread and locking screw thread between be stress relief groove, stress relief groove's diameter be less than joint screw thread and locking screw thread's base diameter, make joint screw thread with stress relief groove between form the external shoulder, the body of rod is wrapped up in the anticorrosive coating locking screw thread on connect end-stop joint, still include the back-up clamp body, the back-up clamp body has the internal screw thread, the internal screw thread with joint screw thread match, back-up clamp body has the reducing section, the diameter of reducing section be less than joint screw thread base diameter, and with stress relief groove match, back-up clamp body mill into two halves and detain on joint screw thread, the reducing section be in stress relief groove department, back-up clamp body of back-up clamp make back-up clamp body in the back-up clamp body on the shoulder make the back-up clamp body is detained into the fixed thread.
The beneficial effects of the invention are as follows: the locking screw thread can be screwed with the connecting screw thread of the end-stop joint, so that the end-stop joint is fastened on the rod body, which is equivalent to the reliable push surface of the rod body, after the end-stop joint is fastened with the locking screw thread, the fixing device for fixing the back-up clamp body which is milled into two halves is removed, the internal screw thread on the back-up clamp body which is milled into two halves can be separated from the joint screw thread, and the back-up clamp body can be detached from the rod body without rotating a tool, therefore, the connection tightness of the end-stop joint and the locking screw thread can not be reduced when the back-up clamp body is detached. The invention can ensure the assembly quality of the coated sucker rod, ensure the long-term reliable use of the coated sucker rod and has obvious economic benefit.
Drawings
FIG. 1 is a block diagram of a prior art clad sucker rod. In the figure: 7 is a sucker rod coupling, 2 is a dead end joint, 3 is a rod body, and 4 is an anti-corrosion layer.
Fig. 2 is a structural view of the member 3 of fig. 1 after being coated with a corrosion-resistant layer.
Fig. 3 is a structural diagram of the present invention.
Fig. 4 is a plan view of the piece 1 of fig. 3 after being milled in half.
Figure 5 is a cut-away view at A-A of figure 4.
Detailed Description
Embodiments of the present invention are described below with reference to fig. 2,3, 4, 5.
As can be seen from fig. 2, 3, 4,5, the embodiment of the invention comprises a back-up clamp body 1, a stop joint 2, a rod body 3 and an anti-corrosion layer 4, wherein the rod body 3 is provided with a joint thread 3-1 and a locking thread 3-4, the joint thread 3-1 and the locking thread 3-4 have the same screw thread rotation direction, a stress relief groove 3-3 is arranged between the joint thread 3-1 and the locking thread 3-4, the diameter of the stress relief groove 3-3 is smaller than the bottom diameters (small diameters) of the joint thread 3-1 and the locking thread 3-4, an external shoulder 3-2 is formed between the joint thread 3-1 and the stress relief groove 3-3, the rod body 3 is wrapped with the anti-corrosion layer 4 made of high density polyethylene, the stop joint 2 is connected to the locking thread 3-4, the upper end face of the stop joint 2 is under the stress relief groove 3-3, the back-up clamp body 1 is provided with an internal thread 1-2, the internal thread 1-2 is matched with the screw thread 3-1 at the position of the joint thread 3-1, the diameter of the back-up clamp body 1 is smaller than the bottom diameter (small diameter) of the joint 3-1, the diameter of the two screw thread 1-1 is matched with the screw thread 1 at the bottom diameter of the two screw thread 1-3, the two screw thread 1 is matched with the bottom diameter of the screw thread 1-1 at the two screw thread 1-3 at the same position, the diameter of the two screw thread 1 is matched with the bottom diameter of the screw thread 1-1 at the groove 1-3, and the diameter is matched with the bottom diameter of the screw thread 1, the diameter-reducing section 1-1 is limited by the outer shoulder 3-2, and the back-up clamp body 1 cannot rotate after being limited by the outer shoulder 3-2, so that the back-up clamp body 1 cannot be buckled on the joint thread 3-1, and the back-up clamp body 1 is fixed into a whole after being milled into two halves and buckled on the joint thread 3-1 (which is equivalent to that the back-up clamp body is not milled into two halves, and the internal thread on the back-up clamp body can be effectively screwed with the joint thread 3-1).
The inner thread 1-2 is buckled with the joint thread 3-1, the diameter reduction section 1-1 is limited by the outer shoulder 3-2, the back-up clamp body 1 cannot be buckled on the joint thread 3-1, the back-up clamp body 1 is milled and buckled into two halves on the joint thread 3-1 and then fixed into a whole, the back-up clamp body 1 is fixed to be prevented from rotating (one half of the back-up clamp body 1 is welded on a workbench), the end-stop joint 2 is rotated, the rod body 3 cannot be rotated, the locking thread 3-4 can be screwed with the connecting thread of the end-stop joint 2, the end-stop joint 2 is fastened on the rod body 3, the end-stop joint 2 is equivalent to a reliable pushing surface of the rod body 3, after the end-stop joint 2 is connected and fastened with the locking thread 3-4, the fixing device for fixing the back-up clamp body 1 milled into two halves is removed, the inner thread on the back-up clamp body 1 milled and can be disengaged from the joint thread 3-1, and the back-up clamp body 1 can be detached from the joint thread 3-1 without rotating a tool, so that the end-stop joint body can be disconnected from the end-stop joint body 3 and the end-stop joint 2 can not be fastened down, and the end-stop joint can be fastened with the end-stop joint body 3. The back-up wrench clamp body 1 is detached from the joint thread 3-1 and then the sucker rod coupling is installed, so that the coated sucker rod shown in figure 1 is formed.
The rod body 3 has a reliable pushing bearing surface, so that the sucker rod coupling 7 can be locked after being connected with the joint thread 3-1, and the sucker rod coupling 7 cannot be tripped.
The method of milling the back-up clamp body 1 into two halves and fastening the two halves on the joint thread 3-1 into a whole can be designed into various structures for those skilled in the art, and each structure can be implemented only by the present invention, so the present invention does not describe the measure of fixing the two halves of the back-up clamp body 1 into a whole when the two halves are milled and used.
Claims (1)
1. The utility model provides a cladding sucker rod's end-stop joint screw up device, includes end-stop joint (2), body of rod (3), anticorrosive coating (4), has joint screw thread (3-1), locking screw thread (3-4) on body of rod (3), joint screw thread (3-1), locking screw thread (3-4) screw thread to the same, joint screw thread (3-1) and locking screw thread (3-4) between be stress relief groove (3-3), the diameter of stress relief groove (3-3) be less than joint screw thread (3-1) and locking screw thread (3-4) the base diameter, make joint screw thread (3-1) with stress relief groove (3-3) between form external shoulder (3-2), body of rod (3) are gone up and are covered with anticorrosive coating (4) locking screw thread (3-4) on connect end-stop joint (2), characterized by: the back-up clamp comprises a back-up clamp body (1), wherein the back-up clamp body (1) is provided with an internal thread (1-2), the internal thread (1-2) is matched with the joint thread (3-1), a reducing section (1-1) is arranged in the back-up clamp body (1), the diameter of the reducing section (1-1) is smaller than the bottom diameter of the joint thread (3-1) and is matched with the stress relief groove (3-3), the back-up clamp body (1) is milled and buckled on the joint thread (3-1) in two halves, the internal thread (1-2) is buckled with the joint thread (3-1), the reducing section (1-1) is positioned at the stress relief groove (3-3), the reducing section (1-1) is limited by the outer shoulder (3-2), so that the back-up clamp body (1) cannot be buckled on the joint thread (3-1), and the back-up clamp body (1) is milled and buckled on the joint thread (3-1) in two halves.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810276726.6A CN108278091B (en) | 2018-03-30 | 2018-03-30 | End-stop joint tightening device for cladding sucker rod |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810276726.6A CN108278091B (en) | 2018-03-30 | 2018-03-30 | End-stop joint tightening device for cladding sucker rod |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108278091A CN108278091A (en) | 2018-07-13 |
| CN108278091B true CN108278091B (en) | 2024-05-17 |
Family
ID=62810738
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810276726.6A Active CN108278091B (en) | 2018-03-30 | 2018-03-30 | End-stop joint tightening device for cladding sucker rod |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108278091B (en) |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5119700A (en) * | 1991-03-01 | 1992-06-09 | Titan Tool Company | Automatic stud driving tool having collarless retention mechanism for driven head |
| JPH1144313A (en) * | 1997-07-29 | 1999-02-16 | Somic Ishikawa:Kk | Rotation stopping member for fastening member and clamp device |
| US5907983A (en) * | 1997-09-08 | 1999-06-01 | Spirer; Steven E. | Stud remover |
| KR200265048Y1 (en) * | 2001-11-29 | 2002-02-21 | 송완재 | Box spanner |
| CN104499952A (en) * | 2014-11-25 | 2015-04-08 | 张永祥 | Anticorrosion oil pumping rod |
| CN205057896U (en) * | 2015-10-13 | 2016-03-02 | 重庆建设机电有限责任公司 | Dismounting and mounting tool for stud bolt |
| CN107152244A (en) * | 2016-03-04 | 2017-09-12 | 特纳瑞斯连接有限公司 | Sucker rod end |
| CN208024310U (en) * | 2018-03-30 | 2018-10-30 | 山东博诺利石油装备有限公司 | A kind of not-go-end connector device for screwing up of cladding sucker rod |
| CN208981974U (en) * | 2018-10-14 | 2019-06-14 | 滨州华闻机械有限责任公司 | A kind of cladding sucker rod tightened convenient for connector |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6764108B2 (en) * | 1999-12-03 | 2004-07-20 | Siderca S.A.I.C. | Assembly of hollow torque transmitting sucker rods |
| US7610833B2 (en) * | 2006-11-10 | 2009-11-03 | Mccabe Timothy P | Thread gripping tool |
-
2018
- 2018-03-30 CN CN201810276726.6A patent/CN108278091B/en active Active
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5119700A (en) * | 1991-03-01 | 1992-06-09 | Titan Tool Company | Automatic stud driving tool having collarless retention mechanism for driven head |
| JPH1144313A (en) * | 1997-07-29 | 1999-02-16 | Somic Ishikawa:Kk | Rotation stopping member for fastening member and clamp device |
| US5907983A (en) * | 1997-09-08 | 1999-06-01 | Spirer; Steven E. | Stud remover |
| KR200265048Y1 (en) * | 2001-11-29 | 2002-02-21 | 송완재 | Box spanner |
| CN104499952A (en) * | 2014-11-25 | 2015-04-08 | 张永祥 | Anticorrosion oil pumping rod |
| CN205057896U (en) * | 2015-10-13 | 2016-03-02 | 重庆建设机电有限责任公司 | Dismounting and mounting tool for stud bolt |
| CN107152244A (en) * | 2016-03-04 | 2017-09-12 | 特纳瑞斯连接有限公司 | Sucker rod end |
| CN208024310U (en) * | 2018-03-30 | 2018-10-30 | 山东博诺利石油装备有限公司 | A kind of not-go-end connector device for screwing up of cladding sucker rod |
| CN208981974U (en) * | 2018-10-14 | 2019-06-14 | 滨州华闻机械有限责任公司 | A kind of cladding sucker rod tightened convenient for connector |
Also Published As
| Publication number | Publication date |
|---|---|
| CN108278091A (en) | 2018-07-13 |
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