CN102704880A - Fracture fixed core sleeve mill shoe - Google Patents
Fracture fixed core sleeve mill shoe Download PDFInfo
- Publication number
- CN102704880A CN102704880A CN2012101423998A CN201210142399A CN102704880A CN 102704880 A CN102704880 A CN 102704880A CN 2012101423998 A CN2012101423998 A CN 2012101423998A CN 201210142399 A CN201210142399 A CN 201210142399A CN 102704880 A CN102704880 A CN 102704880A
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- fracture
- core
- shoe
- core pipe
- fixed core
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Abstract
The invention provides a fracture fixed core sleeve mill shoe. The fracture fixed core sleeve mill shoe comprises an upper connector (1); a long pipe (2) is in threaded connection with the lower end of the upper connector (1); the lower end of the long pipe (2) is in threaded connection with a body (4); an overlaying layer (5) is arranged at the lower end of the body (4); cutter teeth (6) are arranged in a circumferential direction of the front end of the overlaying layer (5) at intervals; a core pipe connector (3) is connected with the upper end of the body (4) by an inner thread; inner thread buckles and outer thread buckles at the upper end of the body (4) are in opposite directions; the lower end of the core pipe connector (3) is fixedly connected with a core pipe (7); and the lower end of the core pipe (7) is provided with an inclined plane to form a shoe point. The shoe point of the fracture fixed core sleeve mill shoe is inserted into a lower fracture so as to have the effect of stabilizing the fracture; and an external milling cutter is used for milling a deformed sleeve of the fracture, so as to be good for a next step of construction.
Description
Technical field
The invention belongs to a kind of instrument in the big workover treatment in oil field, particularly a kind of fracture core sleeve milling shoe.
Background technology
Along with the oil field is further developed, the cover of well damage situation is also all the more complicated, especially little latus rectum bad break well at present; It often all is active bad break; The ubiquity distortion again of its upper and lower fracture trips out the instrument of getting through after opening passage, its down fracture can depart from the sleeve pipe center line once more; Both lost fracture sleeve pipe down easily, giving down again, the step construction brings inconvenience.
Summary of the invention
In order to solve the problem that exists in the background technology, the present invention provides a kind of fracture core sleeve milling shoe, and this fracture core sleeve milling shoe nib inserts fracture down, plays the effect of stablizing fracture, and outside milling cutter falls fracture crushed element casing milling, convenient step construction down.
Technical scheme of the present invention is: this fracture core sleeve milling shoe comprises top connection, and top connection lower end screw thread is connected with long tube, and long tube lower end screw thread is connected with body; The body lower end is provided with overlay cladding; Be interval with cutter tooth on the front end of overlay cladding is axial, body upper end internal thread connection-core union, body upper end internal thread button is opposite with external thread buckle; Core union lower end is fixedly connected with the core pipe, and core pipe lower end is the inclined-plane.
The present invention has following beneficial effect: the clinohedral class of core pipe of the present invention lower end is similar to nib, and nib inserts fracture down, after throwing off with body, plays the effect of stablizing fracture.Outside milling cutter can fall fracture crushed element casing milling along the core pipe, convenient step construction down.The present invention realizes looking for, getting through integrated, does not lose fracture.
Description of drawings:
Accompanying drawing 1 is a structure sectional view of the present invention;
Accompanying drawing 2 is sectional views of overlay cladding 5 in the accompanying drawing 1.
Among the figure 1, top connection; 2, long tube; 3, core union; 4, body; 5, overlay cladding; 6, cutter tooth; 7, core pipe.
The specific embodiment:
Below in conjunction with accompanying drawing the present invention is described further:
As shown in Figure 1, this fracture core sleeve milling shoe comprises top connection 1, and top connection 1 lower end screw thread is connected with long tube 2; Long tube 2 lower end screw threads are connected with body 4, and body 4 lower ends are provided with overlay cladding 5, are interval with cutter tooth 6 on the front end of overlay cladding 5 is axial; Cutter tooth 6 milling deformed casings, described body 4 upper end internal thread connection-core unions 3, the internal thread button and the external thread buckle of body 4 upper end connection-core unions 3 are opposite; Core union 3 back-offs are flexible, and slide freely in front and back in long tube 2.Core union 3 lower ends are fixedly connected with core pipe 7, and core pipe 7 lower ends are the inclined-plane, and core pipe 7 is inserted into sleeve pipe and has guide effect.
There is a cavity fracture core sleeve milling shoe inside, and after the nib of core pipe 7 lower ends inserted fracture, chucking power made core pipe 7 fixing, rotates fracture core sleeve milling shoe core pipe 7 and body 4 are thrown off, and can relatively move between core pipe 7 and the cavity.Transfer drilling tool, core pipe 7 is motionless to play the introduction effect, but outside milling cutter milling breakpoint is opened passage.
Claims (1)
1. fracture core sleeve milling shoe; Comprise top connection (1), top connection (1) lower end screw thread is connected with long tube (2), and long tube (2) lower end screw thread is connected with body (4); Body (4) lower end is provided with overlay cladding (5); The front end week of overlay cladding (5) upwards is interval with cutter tooth (6), it is characterized in that: described body (4) upper end internal thread connection-core union (3), and body (4) upper end internal thread button is opposite with external thread buckle; Core union (3) lower end is fixedly connected with core pipe (7), and core pipe (7) lower end is the inclined-plane.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012101423998A CN102704880A (en) | 2012-05-09 | 2012-05-09 | Fracture fixed core sleeve mill shoe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012101423998A CN102704880A (en) | 2012-05-09 | 2012-05-09 | Fracture fixed core sleeve mill shoe |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102704880A true CN102704880A (en) | 2012-10-03 |
Family
ID=46897907
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012101423998A Pending CN102704880A (en) | 2012-05-09 | 2012-05-09 | Fracture fixed core sleeve mill shoe |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102704880A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105155518A (en) * | 2015-09-01 | 2015-12-16 | 中国十七冶集团有限公司 | Safe pile-forming construction method for manual hole digging pile in quicksand lot |
| CN105545240A (en) * | 2015-12-11 | 2016-05-04 | 中国石油天然气股份有限公司 | Fracture tracer location channel drilling tool |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201810245U (en) * | 2010-10-22 | 2011-04-27 | 大庆油田有限责任公司 | Mill shoe with detachable pilot for tunneling in oilfield workover operation |
| CN201874502U (en) * | 2010-12-02 | 2011-06-22 | 中国石油集团川庆钻探工程有限公司川东钻探公司 | Heterogeneous diamond tooth-arranging milling shoe with tungsten-carbide matrix structure |
| CN201902187U (en) * | 2010-11-01 | 2011-07-20 | 中国石油集团渤海石油装备制造有限公司 | Multifunctional reverse circulation fragment fishing barrel |
| CN202100208U (en) * | 2011-05-18 | 2012-01-04 | 杨志宏 | Underground work pipe column tripping device |
-
2012
- 2012-05-09 CN CN2012101423998A patent/CN102704880A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201810245U (en) * | 2010-10-22 | 2011-04-27 | 大庆油田有限责任公司 | Mill shoe with detachable pilot for tunneling in oilfield workover operation |
| CN201902187U (en) * | 2010-11-01 | 2011-07-20 | 中国石油集团渤海石油装备制造有限公司 | Multifunctional reverse circulation fragment fishing barrel |
| CN201874502U (en) * | 2010-12-02 | 2011-06-22 | 中国石油集团川庆钻探工程有限公司川东钻探公司 | Heterogeneous diamond tooth-arranging milling shoe with tungsten-carbide matrix structure |
| CN202100208U (en) * | 2011-05-18 | 2012-01-04 | 杨志宏 | Underground work pipe column tripping device |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105155518A (en) * | 2015-09-01 | 2015-12-16 | 中国十七冶集团有限公司 | Safe pile-forming construction method for manual hole digging pile in quicksand lot |
| CN105545240A (en) * | 2015-12-11 | 2016-05-04 | 中国石油天然气股份有限公司 | Fracture tracer location channel drilling tool |
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| PB01 | Publication | ||
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| C12 | Rejection of a patent application after its publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20121003 |