CN2231954Y - Threading device for casing wellhead - Google Patents
Threading device for casing wellhead Download PDFInfo
- Publication number
- CN2231954Y CN2231954Y CN 95215233 CN95215233U CN2231954Y CN 2231954 Y CN2231954 Y CN 2231954Y CN 95215233 CN95215233 CN 95215233 CN 95215233 U CN95215233 U CN 95215233U CN 2231954 Y CN2231954 Y CN 2231954Y
- Authority
- CN
- China
- Prior art keywords
- rotating frame
- leading screw
- well head
- sleeve pipe
- hydraulic motor
- 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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Abstract
The utility model relates to a threading device for casing wellhead, comprising a hydraulic power station, a hydraulic motor, an inner-driving gear pair, a rotating frame, a knife frame, a four-jaw chuck, a fixing seat and screw rod pairs. The four-jaw chuck is clamped on the outer wall of a wellhead casing. The fixing seat is connected with the four-jaw chuck and supports the four-jaw chuck by an upper and a lower flange. The hydraulic motor is positioned on the fixing seat. The rotating frame is arranged between an upper and a lower bearings. Both ends of the rotating frame are provided with dovetail guideways. Both ends of the knife frame are inserted into the dovetail guideways on the rotating frame and the middle part of the knife frame can be parted from or combined to a torque driving key on the lower part of a screw rod by an engaged pressing block. The threading device meets to the API standard and has the advantages of reliable performance and easy operation.
Description
The utility model relates to a kind of at oil, natural gas well head, and impaired casing threads is carried out mach device again, belongs to the petroleum machinery technical field.
Therefore the petroleum gas casing threads bears high pressure (50MPa) and axial tension (2000KN), is the high special taper thread of a kind of required precision, and the API (American Petroleum Institute (API)) that uses with Global Access is as test stone.At present, after damaging, the well head casing threads still do not have advanced method aspect the thread cutting again both at home and abroad.Domestic Sichuan Petroleum Administration once designed a kind of big metal plate tooth device of artificial cover system well head casing threads, and commonly used have two kinds of φ 139.7 (51/2in) and φ 177.8 (7in).This device relies on 16 able-bodied laborers to adopt the mode of turning a millstone to overlap the system screw thread, and well head will dig the hollow place about 8M, and is backward in technique, and device is heavy, and the screw thread of attacking system is discontinuous, and precision is very poor, is difficult to reach the API standard, and costs an arm and a leg.
The purpose of this utility model is to provide a kind of sleeve pipe well head thread cutting device of hydraulic driven, to replace the device of present manpower cover system sleeve pipe well head screw thread.The difficult point of present technique is that the well head sleeve pipe is fixed by cement, and therefore thread cutting again thereon must the cutter rotation, finishes the radial cut plane, vertical 1: 16 tapering of car, last car system taper thread.
The purpose of this utility model is achieved in that sleeve pipe well head thread cutting device comprises that hydraulic power station, hydraulic motor, travelling gear are paid, rotating frame (dovetail guide etc. is arranged on it), knife rest, holder, high accuracy leading screw are paid, chuck etc.Chuck is stuck on the well head sleeve outer wall, and holder connects by last lower flange with chuck and supports; The hydraulic motor seat rotates rotating frame on holder top by power transmission shaft and gear driven ring gear; Rotating frame is installed between upper bearing (metal) and the lower bearing; The rotating frame both sides are equipped with dovetail guide, and insert in the dovetail guide on the rotating frame at the knife rest two ends, middle by the engagement briquetting can with the torque drive key of leading screw bottom pluck from or combine, leading screw is provided with the locking nut with leading screw locking.Rotating frame is provided with the dovetail guide of 1: 16 tapering; Leading screw is paid the inch screw thread into per inch 8 teeth; But hydraulic power station and hydraulic motor are formed the stepless speed-regulating device of a rotating, and its speed adjustable range is 1～120 rev/min.
The utlity model has novelty simple in structure, volume is little, heavy and light, reliable transmission, stable performance, thread surface roughness that processes and precision and sealing property all can reach the API standard, and it is easy to operate, need not the manpower tapping, alleviated working strength of workers, main is that the screw thread that has guaranteed car system has reached the API requirement.The utility model belongs to an original creation device of domestic and international well head sleeve pipe thread cutting.
Below in conjunction with accompanying drawing, the utility model is further described:
Fig. 1 is the utility model structural representation.
In the accompanying drawing: 1-sleeve pipe, 2-holder, 3-ring gear (upper bearing (metal) inner ring), 4-ball, 5-meshes briquetting, 6-nut, 7-locking nut, 8-leading screw, the 9-hydraulic motor, 10-gear, 11-plane bearing, 12-rotating frame (forming) by dovetail guide etc., 13-knife rest, 14-feed piece, 15-feed screw, 16-lower bearing inner ring, 17-ball, 18-lower bearing outer ring (on holder), the last lower flange of 19-, 20-chuck.
In the drawings, chuck 20 tightens on the outer wall of well head sleeve pipe 1, and the centering knife rest is concentric with the sleeve pipe cylindrical.Holder 2 connects with chuck 20 by bolt and last lower flange 19, and is supported in.9 of hydraulic motors are on holder 2, by power transmission shaft and gear 10 and ring gear 3 engaged transmission, ring gear 3 is again the inner ring of upper bearing (metal) simultaneously, and the top of the dovetail guide on its both sides and the rotating frame 12 is by Bolt Connection, thus drive dovetail guide and ring gear 3 synchronous, coaxial rotation.Knife rest 13 is contained in the dovetail guide to rotate and can rotate in nut 6 with leading screw 8 with it and drives it and move up and down along guide rail, and adjusting feed screw 15 just can be set up the depth of cut.The dovetail guide bottom is connected with lower bearing inner ring 16 bolts, and lower bearing outer ring 18 is on holder.One locking nut 7 is arranged on the leading screw, when the engagement briquetting 5 from the torque drive key of leading screw pluck from the time, available locking nut 7 is locked at leading screw on the nut 6, it is not rotated, but knife rest can rotate on the plane bearing 11 under leading screw, fashionable with the torque drive bond when engagement briquetting 5, leading screw rotates and drives knife rest 13 and moves up and down along dovetail guide.
The utility model adopts machinery and hydraulic transmission method, is used as power with hydraulic pump, and the processing end face drives ring gear by hydraulic motor by power transmission shaft during with chamfering, makes the rotating frame rotation and drives knife rest generation circular motion on it.Should make the torque drive key above the leading screw break away from the engagement briquetting in advance, rotate on the plane bearing of knife rest below leading screw.Knife rest only produces circular motion and does not move axially, and this moment can machining screw end face and chamfering.When the processing conical surface and screw thread, to mesh briquetting and torque drive keyed engagement in advance, hydraulic motor rotates simultaneously by transmission ring gear driven rotary framework, leading screw, leading screw rotating band movable knife rack moves axially along dovetail guide, and the lathe tool on the knife rest is finished tapering and cutting thread operating mode on dovetail guide.1: 16 conical surface should meet API ST D 5B standard on the dovetail guide, the inch screw thread of per inch 8 teeth that leading screw is paid should meet API STD 5 B standards, dovetail guide and leading screw rotate a circle synchronously, and the movement locus of its knife rest just in time is the helix of a complete casing threads.Because tapering and per inch tooth number average are by API requirement design, so rotatablely moving of knife rest can process complete API casing threads.
Claims (4)
1. sleeve pipe well head thread cutting device, by hydraulic power station, hydraulic motor, travelling gear pay, rotating frame, knife rest, chuck, holder, leading screw pay and constitute, it is characterized in that: chuck is stuck on the well head sleeve outer wall, and holder connects by last lower flange with chuck and supports; The hydraulic motor seat is on holder top, and rotating frame is located between upper bearing (metal) and the lower bearing; The rotating frame both sides are equipped with dovetail guide, and insert in the dovetail guide on the rotating frame at the knife rest two ends, middle by the engagement briquetting can with the torque drive key of leading screw bottom pluck from or combine, leading screw is provided with the locking nut with leading screw locking.
2. sleeve pipe well head thread cutting device according to claim 1 is characterized in that rotating frame is provided with the dovetail guide of 1: 16 tapering.
3. sleeve pipe well head thread cutting device according to claim 1 is characterized in that leading screw pays the inch screw thread into per inch 8 teeth.
4. sleeve pipe well head thread cutting device according to claim 1, but it is characterized in that hydraulic power station and hydraulic motor form the stepless speed-regulating device of a rotating, and its speed adjustable range is 1～120 rev/min.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 95215233 CN2231954Y (en) | 1995-07-04 | 1995-07-04 | Threading device for casing wellhead |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 95215233 CN2231954Y (en) | 1995-07-04 | 1995-07-04 | Threading device for casing wellhead |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2231954Y true CN2231954Y (en) | 1996-07-31 |
Family
ID=33864625
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 95215233 Expired - Fee Related CN2231954Y (en) | 1995-07-04 | 1995-07-04 | Threading device for casing wellhead |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2231954Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107552900A (en) * | 2017-11-02 | 2018-01-09 | 山东沂水机床厂有限公司 | A kind of lathe pipe screw thread taper thick stick |
| CN109822352A (en) * | 2018-12-24 | 2019-05-31 | 山东祺龙海洋石油钢管股份有限公司 | A kind of Portable sleeve thread machining device |
-
1995
- 1995-07-04 CN CN 95215233 patent/CN2231954Y/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107552900A (en) * | 2017-11-02 | 2018-01-09 | 山东沂水机床厂有限公司 | A kind of lathe pipe screw thread taper thick stick |
| CN109822352A (en) * | 2018-12-24 | 2019-05-31 | 山东祺龙海洋石油钢管股份有限公司 | A kind of Portable sleeve thread machining device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 1996.07.31 |