CN201090166Y - Salvaging callback cover mill shoe multiple-limb well - Google Patents
Salvaging callback cover mill shoe multiple-limb well Download PDFInfo
- Publication number
- CN201090166Y CN201090166Y CNU2007201729512U CN200720172951U CN201090166Y CN 201090166 Y CN201090166 Y CN 201090166Y CN U2007201729512 U CNU2007201729512 U CN U2007201729512U CN 200720172951 U CN200720172951 U CN 200720172951U CN 201090166 Y CN201090166 Y CN 201090166Y
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- casing milling
- casing
- casing section
- mill
- milling
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Abstract
Disclosed is a special fishing and withdrawing casing milling shoe used for a multilateral well, which is applied to well drilling or workover treatment for drill string casing milling or fish casing milling. The utility model comprises a casing milling pipe and casing milling teeth, and is characterized in that: spiral righting blocks are arranged on the outer wall of the casing milling pipe, and wear resistant materials are inlaid on the spiral righting blocks. The lower end of the casing milling pipe is evenly distributed and welded with strip shape casing milling teeth. The lower end of the casing milling pipe is also evenly distributed with strip shape troughs for cycling drilling fluid. The utility model has the effects that: a drilling fluid circulating space is formed between the spiral righting blocks due to the adoption of the spiral righting blocks, the drilling fluid is smooth when in the process of casing milling, and can complete the casing milling and fishing operation under the condition of rather small annulus in underground. Meanwhile, adopting the righting blocks on the outer wall of the casing milling pipe can hold back the radial pulsation of the casing milling shoe when in operation in underground, thereby improving the safety and stability of casing milling. The next drill string can complete two tasks of casing milling and fishing.
Description
Technical field
The utility model relates to a kind of drilling well fishing tool, particularly drilling well packaged milling tool.Be to be applied in drilling well or the workover treatment, cover mills drill string or cover mills the instrument of fish.
Background technology
In oil drilling well workover process, drilling tool fish accident takes place in the down-hole sometimes, and promptly the well casing shell of column drops in the well.Usually adopting the method for salvaging is earlier accident section well to be enlarged, and is lowered to packaged milling tool then around tubing string, implements the segmentation cover and mills construction, at last fish in the well is salvaged ground.But the less position of down-hole annular is being overlapped when milling construction processing, used conventional packaged milling tool to be difficult to bring very big difficulty to accident treatment by the narrow and small annular space in down-hole.
Chinese patent notification number CN2835535Y provides a kind of cover to mill fishing tool.By adopting milling head and bailer grab to be used, realize milling and salvaging and usefulness, reduce the risk of whipstock fishing, improve the success rate of the fishing of whipstock, simultaneously can also be as the usefulness of salvaging trouble of lost tool in hole.
Summary of the invention
The utility model purpose is to provide a kind of simple in structure, safe and reliable multilateral well the special-purpose recovery set milling shoe of salvaging, make this milling shoe can be under the less situation of down-hole annular, finish cover and mill operation, and next time drill string is finished cover and is milled and salvage two tasks.
The purpose of this utility model is achieved in that the special-purpose recovery set milling shoe of salvaging of multilateral well comprises: casing section mill and cover mill teeth.Spiral helicine wiper block is arranged on the outer wall of casing section mill, on the helical form wiper block, be inlaid with high-abrasive material.The even distribution is welded with the cover mill teeth of strip in the lower end of casing section mill.Lower end at casing section mill also is evenly distributed with the strip tank, and tank is used for circulating fluid.The casing section mill inwall has the salvaging platform, is used for quilt cover milled proposing salvaging on the fish.Salvaging platform is annular boss, salvages platform 6 on the casing section mill bottom interior wall.
When this milling shoe cover milled to the precalculated position, milling shoe triggering quilt cover milled the switch on the fish, and quilt cover mills the fixture block that carries on the fish and ejects, and fixture block is stuck in salvages the platform upper end, and the fish that upper lifting pipe post quilt cover mills is carried and salvages.
The beneficial effects of the utility model: the utility model multilateral well is special-purpose salvages the recovery set milling shoe owing to adopt the helical form wiper block, between the helical form wiper block, constitute drilling fluid circulation space, the drilling fluid that feasible cover mills in the process is unimpeded, make milling shoe only occupy less annular space, can be under the less situation of down-hole annular, finish cover and mill fishing, next time drill string is finished cover and is milled and salvage two tasks.Simultaneously, adopt wiper block on the outer wall of casing section mill, make when milling shoe carries out operation in the down-hole, be not easy to produce circular runout, improve cover and mill security and stability.
Accompanying drawing and description of drawings:
Fig. 1 is the special-purpose structural profile schematic diagram of salvaging the recovery set milling shoe of the utility model multilateral well.
Fig. 2 is the upward view of Fig. 1.
Among the figure, 1. casing section mill, 2. wiper block, 3. high-abrasive material, 4. cover mill teeth, 5. tank is 6. salvaged platform.
The specific embodiment
The utility model is described in further detail below in conjunction with accompanying drawing.
Embodiment 1: consult Fig. 1.The special-purpose recovery set milling shoe of salvaging of the utility model multilateral well is made up of casing section mill 1 and cover mill teeth 4 and wiper block 2.Casing section mill 1 is cylindric, 204.6 millimeters of external diameters, 183.4 millimeters of internal diameters, 900 millimeters of length.The tool joint internal thread is arranged at casing section mill 1 top.On casing section mill 1, be welded with 3 spiral helicine wiper blocks 2.Staggered studding with high-abrasive material 3 on the external surface of spiral helicine wiper block 2, high-abrasive material 3 is artificial diamond's stones.Consult Fig. 2.The even distribution is welded with the cover mill teeth 4 of strip in the lower end of casing section mill 1.The quantity of cover mill teeth 4 is 13.Lower end at casing section mill 1 also is evenly distributed with strip tank 5, is used for circulating fluid.The quantity of tank 5 is 3.The casing section mill inwall has the platform 6 of salvaging for 60 millimeters apart from cover mill teeth 4 bottoms.Salvaging platform 6 is ring-types, 50 millimeters of height.
This multilateral well is special-purpose salvages the recovery set milling shoe in use, is connected with the drill string bottom thread by the top sub screw thread of casing section mill 1, is lowered into that cover mills the position in the well, by rotation thin-walled milling shoe, drive overlap mill teeth 4 finish overlap mill, fishing.
Claims (1)
1. the recovery set milling shoe is salvaged in a multilateral well special use, comprise: casing section mill (1) and cover mill teeth (4), spiral helicine wiper block (2) is arranged on the outer wall of casing section mill (1), on helical form wiper block (2), be inlaid with high-abrasive material (3), the even distribution is welded with the cover mill teeth (4) of strip in the lower end of casing section mill (1), it is characterized in that: also be evenly distributed with strip tank (5) in the lower end of casing section mill (1), the quantity of tank (5) is between 3-6, the casing section mill inwall has salvaging platform (6), salvaging platform (6) is annular boss, salvages platform (6) on casing section mill (1) bottom interior wall.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007201729512U CN201090166Y (en) | 2007-09-04 | 2007-09-04 | Salvaging callback cover mill shoe multiple-limb well |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007201729512U CN201090166Y (en) | 2007-09-04 | 2007-09-04 | Salvaging callback cover mill shoe multiple-limb well |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201090166Y true CN201090166Y (en) | 2008-07-23 |
Family
ID=39861926
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2007201729512U Expired - Lifetime CN201090166Y (en) | 2007-09-04 | 2007-09-04 | Salvaging callback cover mill shoe multiple-limb well |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201090166Y (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103452511A (en) * | 2013-08-19 | 2013-12-18 | 中国地质大学（北京） | Horizontal well strong magnetic die |
| CN107288567A (en) * | 2017-08-10 | 2017-10-24 | 贵州高峰石油机械股份有限公司 | A kind of reversible set milling fishing integrated device and its Refloatation method |
| CN104514506B (en) * | 2014-12-18 | 2018-03-27 | 贵州高峰石油机械股份有限公司 | The improved method of junk mill and the spiral impregnated type junk mill with reaming hole function |
| CN113803012A (en) * | 2021-09-09 | 2021-12-17 | 中石化石油工程技术服务有限公司 | Method for completing horizontal well casing milling by utilizing sawtooth type casing milling shoe |
-
2007
- 2007-09-04 CN CNU2007201729512U patent/CN201090166Y/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103452511A (en) * | 2013-08-19 | 2013-12-18 | 中国地质大学（北京） | Horizontal well strong magnetic die |
| CN103452511B (en) * | 2013-08-19 | 2016-03-30 | 中国地质大学（北京） | Horizontal well strong magnetic die |
| CN104514506B (en) * | 2014-12-18 | 2018-03-27 | 贵州高峰石油机械股份有限公司 | The improved method of junk mill and the spiral impregnated type junk mill with reaming hole function |
| CN107288567A (en) * | 2017-08-10 | 2017-10-24 | 贵州高峰石油机械股份有限公司 | A kind of reversible set milling fishing integrated device and its Refloatation method |
| CN113803012A (en) * | 2021-09-09 | 2021-12-17 | 中石化石油工程技术服务有限公司 | Method for completing horizontal well casing milling by utilizing sawtooth type casing milling shoe |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20080723 |
|
| CX01 | Expiry of patent term |