CN202510048U - Sleeve thread butted joint external centralizer - Google Patents
Sleeve thread butted joint external centralizer Download PDFInfo
- Publication number
- CN202510048U CN202510048U CN2012201331883U CN201220133188U CN202510048U CN 202510048 U CN202510048 U CN 202510048U CN 2012201331883 U CN2012201331883 U CN 2012201331883U CN 201220133188 U CN201220133188 U CN 201220133188U CN 202510048 U CN202510048 U CN 202510048U
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- CN
- China
- Prior art keywords
- sleeve
- tube
- joint
- butt joint
- butted joint
- Prior art date
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- Expired - Fee Related
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Abstract
The utility model relates to a petroleum well conditioning sleeve changing operation tool, and in particular relates to a sleeve thread butted joint external centralizer. The device comprises a connector and a centering cylinder, wherein the upper and lower ends of the connector are both provided with box threads, and the lower end of the connector is in threaded connection with a short sleeve; and the upper and lower ends of the short sleeve are both provided with public threads, the upper end of the centering cylinder is welded with the connector, the lower end of the centering cylinder is provided with an introducing cylinder, and the lower end of the introducing cylinder is welded with a mill head. The sleeve thread butted joint external centralizer provided by the utility model realizes that the butted joint deflection buckle is avoided, the butted joint success ratio is improved, and the sleeve taking sleeve changing operation is smoothly completed; and the defect that the original well sleeve and the new sleeve have different centers and the butted joint deflection buckle when the existing sleeve is butted to be overcome.
Description
Technical field:
The utility model relates to a kind of petroleum well workover and gets the cover operation instrument that changes, the outer centralizer of particularly a kind of casing threads butt joint.
Background technology:
At present, in the petroleum well workover operation, the cover method is bought or get by illegal means in commonly used getting to be spike tubing string method and once to overlap milling.Spike tubing string method: get the cover before in well, be lowered to suitable dimension drilling tool as the spike tubing string.Mill at cutting, cover, in the processes such as salvaging, back-off, milling, butt joint, the spike tubing string is applied in well head and the production string all the time, loses in bore hole to prevent top of fish.Common sleeve pipe docking calculation is to adopt the butt joint of lead sealing cementing rejoining device to carry out screw thread with direct new casing down with former casing to dock.Following new casing and former casing carry out the screw thread butt joint, have former casing and new casing decentraction, and butt joint is the problem of button partially.
The utility model content:
The technical problem that the utility model will solve provides the outer centralizer of a kind of casing threads butt joint, and this device has realized avoiding docking inclined to one side button, improves the butt joint success rate, accomplishes to get smoothly and buys or get by illegal means the cover operation.Overcome and had former casing and new casing decentraction, the deficiency that butt joint is detained partially when existing sleeve pipe docks.
The technical scheme that the utility model is taked is: the outer centralizer of a kind of casing threads butt joint comprises joint and sets upright tube; The joint upper and lower side all is designed with box thread, and the joint lower end is threaded with short sleeve, and the short sleeve upper and lower side all is designed with male thread, sets upright tube upper end and joint welding, sets upright a lower end and is designed with the introducing tube, introduces the tube lower end and is welded with milling head.
Set upright the external diameter 3～4mm of the internal diameter of tube greater than former casing box cupling.
Introduce the external diameter 10～50mm of the internal diameter of tube greater than former casing box cupling.
Introduce the external diameter 6～10mm of the external diameter of tube less than milling head.
The external diameter of milling head is less than the internal diameter 8～20mm of well.
The beneficial effect of the utility model is: the utility model is owing to adopted the joint lower end to be threaded with short sleeve; Set upright the mode of tube upper end and joint welding; Thereby have the effect of avoiding docking inclined to one side button, and improve the butt joint success rate, accomplish to get smoothly and buy or get by illegal means the cover operation; Owing to adopted introducing a tube lower end and be welded with the structure of milling head, thereby have to expand and mill well, remove the function of well foreign matter, the butt joint tubing string can be put in place down smoothly.
Description of drawings:
Below in conjunction with the accompanying drawing and the specific embodiment the utility model is done further detailed explanation.
Accompanying drawing is the structural representation of the utility model.
The specific embodiment:
Shown in accompanying drawing, the outer centralizer of a kind of casing threads butt joint comprises joint 1 and sets upright tube 3; Joint 1 upper and lower side all is designed with box thread, and the upper end box thread is used to connect new casing, and joint 1 lower end is threaded with short sleeve 2, and short sleeve 2 upper and lower sides all are designed with male thread, and the lower end male thread is used for and former casing butt joint.Set upright tube 3 upper ends and joint 1 welding, set upright tube 3 lower ends and be designed with introducing tube 4, introduce tube 4 lower ends and be welded with milling head 5.Milling head 5 is made up of hard alloy blocks etc., has the cover milling and cuts function, is used to remove well foreign matter and expansion and mills well.Set upright the external diameter 3～4mm of the internal diameter of tube 3 greater than former casing box cupling.Introduce the external diameter 10～50mm of the internal diameter of tube 4 greater than former casing box cupling.Introduce the external diameter 6～10mm of the external diameter of tube 4 less than milling head 5.The external diameter of milling head 5 is less than the internal diameter 8～20mm of well.
When the utility model uses, joint 1 is connected the lower end of new casing, passes the spike tubing string near top of fish, turn on pump rotates rotating disk, puts while changeing former casing to be got into introduce tins 4.When former casing gets into when setting upright tube 3 near short sleeve 2,, make butt joint screw thread centering owing to set upright the restriction of tube 3.Continue rotation, the screw thread butt joint, this moment, pump pressure obviously raise, and termination of pumping continues the rotation drilling tool, when moment of torsion reaches technical requirements, stops the rotation, and accomplishes butt joint.
It is understandable that; More than about the specific descriptions of the utility model; Only be used to the utility model is described and be not to be subject to the described technical scheme of the utility model embodiment; Those of ordinary skill in the art should be appreciated that still and can make amendment or be equal to replacement the utility model, to reach identical technique effect; As long as satisfy the use needs, all within the protection domain of the utility model.
Claims (5)
1. the outer centralizer of casing threads butt joint comprises joint (1) and sets upright tube (3); It is characterized in that: joint (1) upper and lower side all is designed with box thread; Joint (1) lower end is threaded with short sleeve (2); Short sleeve (2) upper and lower side all is designed with male thread; Set upright (3) upper end and joint (1) welding, set upright tube (a 3) lower end and be designed with introducing tube (4), introduce tube (a 4) lower end and be welded with milling head (5).
2. according to the outer centralizer of the described casing threads butt joint of claim 1, it is characterized in that: the said external diameter 3～4mm that sets upright the internal diameter of tube (3) greater than former casing box cupling.
3. according to the outer centralizer of the described casing threads butt joint of claim 1, it is characterized in that: the said external diameter 10～50mm that introduces the internal diameter of tube (4) greater than former casing box cupling.
4. according to the outer centralizer of the described casing threads butt joint of claim 1, it is characterized in that: the said external diameter 6～10mm that introduces the external diameter of tube (4) less than milling head (5).
5. according to the outer centralizer of the described casing threads butt joint of claim 1, it is characterized in that: the external diameter of said milling head (5) is less than the internal diameter 8～20mm of well.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012201331883U CN202510048U (en) | 2012-03-31 | 2012-03-31 | Sleeve thread butted joint external centralizer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012201331883U CN202510048U (en) | 2012-03-31 | 2012-03-31 | Sleeve thread butted joint external centralizer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202510048U true CN202510048U (en) | 2012-10-31 |
Family
ID=47062540
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012201331883U Expired - Fee Related CN202510048U (en) | 2012-03-31 | 2012-03-31 | Sleeve thread butted joint external centralizer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202510048U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109113623A (en) * | 2018-10-25 | 2019-01-01 | 中石化石油工程技术服务有限公司 | A kind of synchronous righting packaged milling tool of casing damaged well and its construction method |
-
2012
- 2012-03-31 CN CN2012201331883U patent/CN202510048U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109113623A (en) * | 2018-10-25 | 2019-01-01 | 中石化石油工程技术服务有限公司 | A kind of synchronous righting packaged milling tool of casing damaged well and its construction method |
| CN109113623B (en) * | 2018-10-25 | 2023-06-02 | 中石化石油工程技术服务有限公司 | Casing damage well synchronous centralizing casing milling tool and construction method thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| 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 |
Granted publication date: 20121031 Termination date: 20130331 |