CN204299502U - Wellhead casing pipe pipe nipple unscrewing device - Google Patents
Wellhead casing pipe pipe nipple unscrewing device Download PDFInfo
- Publication number
- CN204299502U CN204299502U CN201420642987.2U CN201420642987U CN204299502U CN 204299502 U CN204299502 U CN 204299502U CN 201420642987 U CN201420642987 U CN 201420642987U CN 204299502 U CN204299502 U CN 204299502U
- Authority
- CN
- China
- Prior art keywords
- shackle
- cylindrical shell
- wellhead casing
- poppet
- nipple
- 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.)
- Expired - Fee Related
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- Excavating Of Shafts Or Tunnels (AREA)
Abstract
The utility model discloses a kind of wellhead casing pipe pipe nipple unscrewing device, belong to oilfield downhole operation workover tool technical field.It is made up of poppet, shackle cylindrical shell, and shackle cylindrical shell bottom is slips, and slips comprises slip spider, slip insert, and the inner tubal wall of slip spider has at least three symmetrical back taper draw-in grooves, and slip insert is placed in draw-in groove, and the middle part of shackle cylindrical shell has radial direction through hole; Poppet is plugged in shackle cylindrical shell upper portion central hole, and has pin affixed.The utility model blocks wellhead casing pipe pipe nipple by shackle cylindrical shell, by swivel shackle cylindrical shell or poppet, wellhead casing pipe pipe nipple is rotated thereupon, reaches and the object of connecting portion shackle between well inner sleeve.
Description
Technical field
The utility model relates to a kind of wellhead casing pipe pipe nipple unscrewing device, belongs to oilfield downhole operation workover tool technical field.
Background technology
At present, in the well workover construction of old well, usually running into the situation that wellhead casing pipe pipe nipple damages, for meeting the requirement such as well control safety and production, must change defective casing nipple.In this construction, because unload casing nipple to need high moment of torsion, existing pipe wrench and chain wrench method for dismounting, be difficult to meet construction requirement.Wellhead casing pipe pipe nipple is slit into two pieces by on-the-spot general employing gas welding, then take off, but such action need is got angry at well head, if there is oil gas to emerge in well, then easily cause well head explode or catch fire, security risk is large; Simultaneously also very high to the skill set requirements of gas welding operating personnel, otherwise easily the casing coupling screw thread of wellhead casing pipe pipe nipple bottom is damaged, make construction more complicated.
The patent No. 98221509.6 discloses a kind of Short casing break out device, be be loaded in the groove of its body interior by dental lamina, torsion ring symmetry is arranged on the end face of its body, when to casing nipple shackle process, rotated by boosting-rod, there is the defect that dismounting, operating process are loaded down with trivial details.
Summary of the invention
The purpose of this utility model is loaded down with trivial details for the constructing operation existed in above-mentioned prior art, and labour intensity is high, the defect that production efficiency is low, security risk is large, provides a kind of wellhead casing pipe pipe nipple unscrewing device.
The utility model is made up of poppet, shackle cylindrical shell, shackle cylindrical shell bottom is slips, and slips comprises slip spider, slip insert, and the inner tubal wall of slip spider has at least three symmetrical back taper draw-in grooves, slip insert is placed in draw-in groove, and the middle part of shackle cylindrical shell has radial direction through hole; Poppet is plugged in shackle cylindrical shell upper portion central hole, and has pin affixed.
The utility model blocks wellhead casing pipe pipe nipple by shackle cylindrical shell, by swivel shackle cylindrical shell or poppet, wellhead casing pipe pipe nipple is rotated thereupon, reaches and the object of connecting portion shackle between well inner sleeve.
Accompanying drawing explanation
Fig. 1 is the assembling drawing of the utility model embodiment.
Detailed description of the invention
As shown in Figure 1, the utility model is made up of poppet 1, shackle cylindrical shell 2, shackle cylindrical shell 2 bottom is slips, slips comprises slip spider 6, slip insert 8, the inner tubal wall of slip spider 6 has at least three symmetrical back taper draw-in grooves 7, slip insert 8 is placed in draw-in groove 7, and the middle part of shackle cylindrical shell 2 has radial direction through hole 5; Poppet 1 is plugged in shackle cylindrical shell 2 upper portion central hole, and has pin 3 affixed.
Radial direction through hole 5 in the middle part of described shackle cylindrical shell 2, in " ten " word cross-like, according to on-the-spot actual, can select boosting-rod plug-in mounting position.
On the tube wall on the top of the slips of described shackle cylindrical shell 2, at least 2 symmetrical Limit screws 4 are installed, when shackle for preventing, produce between slip insert 8 and wellhead casing pipe pipe nipple outer wall and slide up and down, the pressure of slip insert 8 pairs of casing nipple outer walls is kept.
When using the utility model to the shackle of wellhead casing pipe pipe nipple, its shackle cylindrical shell 2 is placed on wellhead casing pipe pipe nipple, again its poppet 1 is mentioned by the hoisting hook of implement, poppet 1 is together up with shackle cylindrical shell 2, slip insert 8 is forced tightly to bite wellhead casing pipe pipe nipple outer wall under the effect of draw-in groove 7, forced between shackle cylindrical shell 2 and casing nipple outer wall by positioning screw 4 and no longer relative sliding occurs, ensure that slip insert 8 tightly can bite sleeve outer wall in shackle process, shed weight on hook, by boosting-rod through any one group of radial direction through hole 5 in the middle part of shackle cylindrical shell 2, poppet 1 is passed through again with hydraulic tongs, slips through shackle cylindrical shell 2 applies break-out torque to casing nipple, simultaneously by pass through the boosting-rod of any one group of radial direction through hole 5 in the middle part of shackle cylindrical shell 2, manpower break-out torque is applied to casing nipple, releasing to casing nipple can be realized, residue shackle is completed by hydraulic tongs again after releasing, successfully can lay down casing nipple.Wellhead casing pipe pipe nipple can be unloaded down by the utility model relatively easily, reaches and makes construction safer, constructor's more convenient operation object, and can reduce constructor's labour intensity, has significant economic benefit simultaneously.
Claims (3)
1. wellhead casing pipe pipe nipple unscrewing device, be made up of poppet (1), shackle cylindrical shell (2), it is characterized in that: shackle cylindrical shell (2) bottom is slips, slips comprises slip spider (6), slip insert (8), the inner tubal wall of slip spider (6) has at least three symmetrical back taper draw-in grooves (7), slip insert (8) is placed in draw-in groove (7), and the middle part of shackle cylindrical shell (2) has radial direction through hole (5); Poppet (1) is plugged in shackle cylindrical shell (on 2) portion centre bore, and has pin (3) affixed.
2. wellhead casing pipe pipe nipple unscrewing device according to claim 1, is characterized in that: the radial direction through hole (5) at described shackle cylindrical shell (2) middle part is in " ten " word cross-like.
3. wellhead casing pipe pipe nipple unscrewing device according to claim 1 and 2, is characterized in that: on the tube wall on the top of the slips of described shackle cylindrical shell (2), installs at least 2 symmetrical Limit screws (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420642987.2U CN204299502U (en) | 2014-10-31 | 2014-10-31 | Wellhead casing pipe pipe nipple unscrewing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420642987.2U CN204299502U (en) | 2014-10-31 | 2014-10-31 | Wellhead casing pipe pipe nipple unscrewing device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204299502U true CN204299502U (en) | 2015-04-29 |
Family
ID=53105048
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420642987.2U Expired - Fee Related CN204299502U (en) | 2014-10-31 | 2014-10-31 | Wellhead casing pipe pipe nipple unscrewing device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204299502U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109025849A (en) * | 2018-08-08 | 2018-12-18 | 中国海洋石油集团有限公司 | A kind of multi-functional drill collar lifting nipple |
-
2014
- 2014-10-31 CN CN201420642987.2U patent/CN204299502U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109025849A (en) * | 2018-08-08 | 2018-12-18 | 中国海洋石油集团有限公司 | A kind of multi-functional drill collar lifting nipple |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150429 Termination date: 20161031 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |