CN2044639U - Seated back clamp - Google Patents
Seated back clamp Download PDFInfo
- Publication number
- CN2044639U CN2044639U CN 89200789 CN89200789U CN2044639U CN 2044639 U CN2044639 U CN 2044639U CN 89200789 CN89200789 CN 89200789 CN 89200789 U CN89200789 U CN 89200789U CN 2044639 U CN2044639 U CN 2044639U
- Authority
- CN
- China
- Prior art keywords
- flange
- tong
- planet
- connecting rod
- ring gear
- 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.)
- Withdrawn
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- Clamps And Clips (AREA)
Abstract
The utility model discloses a seated back clamp used to bear the reaction torque of a power clamp during oilfield petroleum engineering. The seated back clamp is that two pieces of flanges are connected with a ring gear through screws as an entity, and the interior of the flanges and the ring gear are provided with planet claw clamping mechanisms. The planet claw clamps and unclamps pipes through the control of a cylinder. The seated back clamp is fixed to the wellhead of an oil well when in the operation. When the power clamp is screwed on the right side is fixed, while when the power clamp is shackled the reverse side is fixed, and a tubing elevator falls on the seated back clamp. The planet claw chuck a pipe body, making the seated back clamp bear the reaction torque when the power clamp is screwed on and shackled.
Description
The utility model is to be used in the petroleum production engineering of oil field and matching used a kind of the formula back-up tong of Power Tong, and being suitable for the clamping tube scope can determine arbitrarily.
Available dynamic pincers back-up tong is a suspended structure, is fixed on the bottom of Power Tong, pushes pipe together in company with Power Tong during work, and by manually-operated elder generation clamping tube, after Power Tong started, back-up tong played the supporting reaction torque.Work finishes, and by manually-operated back-up tong is removed from pipe, withdraws pipe together with Power Tong again.This back-up tong be unable to do without manual operations during work, work finishes and also must remove out by hand, and using wastes time and energy, and unloads the service speed of pipe in the influence.The clamping caliber is limited in scope, and is suspended on the push-and-pull operation influence to some extent that makes Power Tong on the Power Tong.
Task of the present utility model is that a kind of seat formula back-up tong that is fixed on well mouth of oil well will be provided, and replaces manually-operated with pneumatic control, clamps the caliber wide ranges, and it is time saving and energy saving that operation is saved trouble, and helps to improve well workover work efficiency and quality.
Task of the present utility model is finished as follows: the housing of back-up tong is made of two flanges and a ring gear.Ring gear is clipped between two flanges, by sinking to screw flange and ring gear are fixed together, the planet pawl clamp mechanism that the housing the inside is provided with is by several planet pawls of circumference uniform distribution, rotating shaft and two planet pawl junction plates constitute, the local external tooth of planet pawl is meshed with the ring gear of housing, on the eccentric positive camber of planet pawl, be fixed with positive camber shape block teeth, be used for clamping tube, planet pawl shaft support is on two planet pawl junction plates, two junction plates respectively are fixed with a planet carrier connecting rod that stretches out housing, its terminal and air cylinder connecting rod hinge joint, and the cylinder block hinge joint is on local epitaxy's part of shell flange.During cylinder operation, driving is rotated by the planet carrier that planet pawl junction plate and rotating shaft constitute, because each planet pawl has local external tooth to be meshed with the housing ring gear, when planet carrier rotates, the equal synchronous rotation axle rotation of each planet pawl, the eccentric positive camber block teeth on the planet pawl can clamp any caliber in the accommodation.Before the work, a seat formula back-up tong is connected with wellhead flange by the shell flange bolt hole, and during work, pipe elevator drops on the back-up tong shell flange, and it is tight that this face of back-up tong shell flange and well head are connected to clip, and overturning, to be connected with well head by another side then be the shackle clamping.On when unloading gas thread, realize that by the gas control operation back-up tong clamps or unclamps pipe.After the planet pawl unclamps pipe withdrawal, do not hinder the tubing string pipe fitting remove by.
Below with reference to accompanying drawing the utility model is described in further detail.
Fig. 1 is the front view of seat formula back-up tong.
Fig. 2 is the A-A sectional view of Fig. 1.
Fig. 3 is the B-B sectional view of Fig. 1.
Fig. 4 is a planet pawl clamp mechanism schematic diagram.
With reference to accompanying drawing 1, flange (1).Flange (2) and ring gear (7) constitute seat formula back-up tong housing, enclosure interior has planet pawl clamp mechanism (3), this mechanism links with air cylinder connecting rod (6) mutually by planet carrier connecting rod (4) (5), cylinder block (8) hinge joint is on the epitaxial part (9) (10) of flange (1) (2), flange (1) (2) respectively has several through holes (13) (14) of circle distribution, and each planet pawl has local external tooth (11) to be meshed with the internal tooth (12) of ring gear.
With reference to accompanying drawing 2, planet carrier connecting rod (16) (18) links to each other with planet pawl junction plate (20) (21) with sunk screw, and the other end links with bearing pin (17) and air cylinder connecting rod, ring gear is breach (15) up and down, (19), planet carrier connecting rod (16), (18) are from stretching out outside the housing here.
With reference to accompanying drawing 3, planet pawl (22) is supported on the planet pawl junction plate (20) (21) by rotating shaft (23), planet pawl junction plate endoporus has the conical surface (24) that current are taken advantage of a situation to flow away, there is sealing ring (25) to prevent that rainwater and current from immersing, have a circle steel ball (26) to make between planet pawl junction plate and the shell flange and become rolling friction, flange (1) (2) tightens together with screw and ring gear (7).
With reference to accompanying drawing 4, planet pawl clamp mechanism (3) has several planet pawls (22) to press circumference uniform distribution, the planet pawl is outer local external tooth (11), inner have eccentric positive camber (27) and positive camber block teeth (a 28) Xiang Wenhe, planet pawl (22) can center on rotating shaft (23) and rotate, the coordinate figure at block teeth (28) cusp contour curve countershaft center is determined by Microcomputer Calculation, making the ratio of its tangential force that clamps any tube surface that caliber is created in the accommodation and radial load is an invariable value, thereby guarantees the interior reliable grip of caliber arbitrarily of accommodation.
During work, this back-up tong is fixed on the well mouth of oil well flange, and elevator drops on above the back-up tong, cylinder forward air feed, and air cylinder connecting rod (6) stretches out, and drives planet pawl junction plate (20) (21) and turns an angle.Each planet pawl rotation certain angle thereupon contacts with tube surface to positive camber block teeth (28), when unloading screw thread on the Power Tong, the clamping force of each block teeth of back-up tong increases with the increase of revolving force, support the reaction torque of Power Tong effectively, unload screw thread on the Power Tong and finish, the reverse air feed of cylinder, air cylinder connecting rod (6) withdrawal, drive planet pawl junction plate (20) (21) and each planet pawl and produce and above-mentioned opposite action, tubing string passes through smoothly, finish a pipe on unload operation.
Claims (5)
1, a kind of by flange (1) (2), ring gear (7), planet pawl clamp mechanism (3), air cylinder connecting rod (6).Cylinder block (8).The seat formula back-up tong that planet carrier connecting rod (4) (5) is formed, it is characterized in that: adopt between flange (1) (2) and the ring gear (7) and sink to screw and be connected, ring gear is sandwiched between flange (1) and the flange (2), planet carrier connecting rod (4) (5) connects together planet pawl clamp mechanism (3) and air cylinder connecting rod (6), and cylinder block (8) links on the epitaxial part (9) (10) of flange (1) (2).
2, by the seat formula back-up tong of claim 1 regulation, it is characterized in that: flange (1) (2) has several holes to can be used to be connected with well mouth of oil well flange or other connector of well head.
3, by the seat formula back-up tong of claim 1 regulation, it is characterized in that: flange has epitaxial part (9) (10).
4, by the seat formula back-up tong of claim 1 regulation, it is characterized in that: planet carrier connecting rod (4) (5) one ends are fixing with sunk screw and planet pawl junction plate (20) (21), the other end and air cylinder connecting rod (6) hinge joint.
5, by the seat formula back-up tong of claim 1 regulation, it is characterized in that: the last lower edge of ring gear is provided with breach (15) (19).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 89200789 CN2044639U (en) | 1989-01-16 | 1989-01-16 | Seated back clamp |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 89200789 CN2044639U (en) | 1989-01-16 | 1989-01-16 | Seated back clamp |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2044639U true CN2044639U (en) | 1989-09-20 |
Family
ID=4858810
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 89200789 Withdrawn CN2044639U (en) | 1989-01-16 | 1989-01-16 | Seated back clamp |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2044639U (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101502969B (en) * | 2009-03-09 | 2010-10-13 | 宁波方力集团有限公司 | Multi-claw clamping mechanism for plastic pipe material of cutter |
| CN102409988A (en) * | 2012-01-10 | 2012-04-11 | 莱州市霸力石油机械有限公司 | Oil pipe pneumatic back tongs |
| CN102409987A (en) * | 2012-01-10 | 2012-04-11 | 莱州市霸力石油机械有限公司 | Two-way pneumatic oil pipe back tongs |
| CN102720444A (en) * | 2012-06-11 | 2012-10-10 | 宝鸡市金豪石油钻采设备有限公司 | Hydrocushion large-tonnage lift sub |
| CN101672168B (en) * | 2009-10-23 | 2013-04-10 | 大庆石油学院 | Workover operation mechanization system replacing well mouth manual operation |
| CN103321596A (en) * | 2013-06-24 | 2013-09-25 | 宝鸡石油机械有限责任公司 | Automatic pipe arranging device driven by single hydraulic cylinder |
| CN108942315A (en) * | 2018-09-10 | 2018-12-07 | 中石化四机石油机械有限公司 | Large torque rotating clamping device |
-
1989
- 1989-01-16 CN CN 89200789 patent/CN2044639U/en not_active Withdrawn
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101502969B (en) * | 2009-03-09 | 2010-10-13 | 宁波方力集团有限公司 | Multi-claw clamping mechanism for plastic pipe material of cutter |
| CN101672168B (en) * | 2009-10-23 | 2013-04-10 | 大庆石油学院 | Workover operation mechanization system replacing well mouth manual operation |
| CN102409988A (en) * | 2012-01-10 | 2012-04-11 | 莱州市霸力石油机械有限公司 | Oil pipe pneumatic back tongs |
| CN102409987A (en) * | 2012-01-10 | 2012-04-11 | 莱州市霸力石油机械有限公司 | Two-way pneumatic oil pipe back tongs |
| CN102720444A (en) * | 2012-06-11 | 2012-10-10 | 宝鸡市金豪石油钻采设备有限公司 | Hydrocushion large-tonnage lift sub |
| CN102720444B (en) * | 2012-06-11 | 2014-08-20 | 宝鸡市金豪石油钻采设备有限公司 | Hydrocushion large-tonnage lift sub |
| CN103321596A (en) * | 2013-06-24 | 2013-09-25 | 宝鸡石油机械有限责任公司 | Automatic pipe arranging device driven by single hydraulic cylinder |
| CN108942315A (en) * | 2018-09-10 | 2018-12-07 | 中石化四机石油机械有限公司 | Large torque rotating clamping device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |