CN202300267U - Ball anti-cutting milling head for taking directional well casing - Google Patents
Ball anti-cutting milling head for taking directional well casing Download PDFInfo
- Publication number
- CN202300267U CN202300267U CN2011204447779U CN201120444777U CN202300267U CN 202300267 U CN202300267 U CN 202300267U CN 2011204447779 U CN2011204447779 U CN 2011204447779U CN 201120444777 U CN201120444777 U CN 201120444777U CN 202300267 U CN202300267 U CN 202300267U
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- China
- Prior art keywords
- milling head
- ball
- cutting
- directional well
- cover
- Prior art date
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- Expired - Fee Related
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Abstract
Provided is a ball anti-cutting milling head for taking a directional well casing. The ball anti-cutting milling head for taking the directional well casing comprises a body (5), and the front end of the body (5) is provided with a cutter body (2) and cutter teeth (1). A chamfer is arranged on the inner edge of the cutter body (2), and each of the cutter teeth (1) is provided with a steel ball (3) and a plug (4). The ball anti-cutting milling head has centralizing and anti-cutting effects and meets the requirements for milling construction of the directional well casing.
Description
Technical field
The utility model relates to the special tool in the big workover treatment in a kind of oil field, belongs to a kind of directional well and gets and apply mechanically the anti-cover milling head of cutting of ball.
Background technology
At present, mill in the construction, mainly use conventional well workover, generally form by cutter hub and body with the cover milling head at the directional well cover.Because directional well has the existence of hole deviation, mill in the process at cover, conventional cover milling head cuts sleeve pipe easily, finally causes the fish head to be lost, and causes the Important Project accident.Therefore, mill in the construction at the directional well cover, to the cover milling head require highly, this instrument should reduce to overlap the friction of milling between drilling tool and the sleeve pipe, prevents the function at bending section cover milling head cutting cover again.
Summary of the invention
In order to overcome the deficiency that exists in the prior art, the utility model provides a kind of directional well to get and applies mechanically the anti-cover milling head of cutting of ball, and this instrument has to be set upright, prevent cutting effect, satisfies the requirement that the directional well cover mills construction.
The technical scheme that the utility model is taked is: this directional well is got and is applied mechanically the anti-cover milling head of cutting of ball and comprise body, and the front end of body is provided with cutter hub, cutter tooth, and described cutter hub inner edge has chamfering, and described each cutter tooth is provided with steel ball and stifled.
The beneficial effect of the utility model is: ball is anti-to be cut the cover milling head and compares in use with other conventional cover milling head and have the following advantages:
1) because directional well has the existence of hole deviation, conventional cover milling head cuts sleeve pipe easily, therefore; The anti-cover milling head of cutting of the ball of design; In have ball to set upright, play well anti-cutting and centralizing function, so just forgone existing cover milling head eccentric wear, defect of cutting sleeve pipe when the bending section cover mills;
2) overlap at lower curved section and mill when construction; Conventional cover milling head inner edge is hung easily and is bumped sleeve pipe, very easily causes the cutting sleeve pipe, the situation that causes the fish head to be lost; The anti-cover milling head of cutting of the ball of design; Inner edge is designed to chamfering, makes it can solve the cover milling head well and hangs the situation of bumping sleeve pipe, reduces the generation of engineering accident;
3) mill construction owing to overlapping at lower curved section, cover milling head serious wear often rises and changes the cover milling head; Not only waste time and energy, also increase construction cost greatly, therefore; When cover mills construction, very high to the requirement of strength of cover milling head material, therefore; This instrument has used superhard material, can satisfy the requirement that cover mills construction.
Description of drawings:
Fig. 1 is the sketch map of the utility model;
Fig. 2 is the left view of the utility model.
1-cutter tooth among the figure, the 2-cutter hub, the 3-steel ball, 4-is stifled, the 5-body.
The specific embodiment:
Below in conjunction with accompanying drawing the utility model is described further:
In conjunction with shown in Figure 1, this directional well is got and is applied mechanically the anti-cover milling head of cutting of ball and draw together body 5, and the front end of body 5 is provided with cutter hub 2, cutter tooth 1, and described cutter hub 2 inner edges have chamfering, and described each cutter tooth 1 is provided with steel ball 3 and stifled 4.Pearl can be free to slide, and mills when construction overlapping, and casing section mill contact with the sleeve pipe of free flexing, and the pearl of slip can reduce the frictional resistance between the two on the one hand, and one side can play to set upright prevents the effect of cutting.The cutter hub inner edge has chamfering in addition, prevents at bending section scratching sleeve pipe.
A bite directional well that 82-oblique 13 wells in west are factories, 110 teams of down-hole well workover on June 3 one group constructed in 2010, looked into cover discovery casing deformation and seriously changeed overhaul.Show that through the data investigation this well hole angle when 200m is 2.8 °, hole angle is 8.5 ° when 250m, and hole angle is 15.0 ° when 300m, and maximum here build angle rate is 12.2 °/100m, and the well depth structure is special, and hole angle is very big, and the anti-difficulty of cutting was big when cover milled.Get at directional well and to change in the cover overhaul process, condom mills in order to guarantee smoothly, must adopt an effective measure, and therefore decision adopts the anti-cover milling head instrument of cutting of ball to realize that the cover of lower curved section mills.BHA is that Φ 290mm ball prevents that cutting cover milling head+3+ball of Φ 219mm casing section mill 2+ball centralizer+casing section mill 2+ball centralizer+casing section mill centralizer+Φ 219mm six rib kelly bars overlaps and mill; In the work progress; The pressure of the drill, drilling speed and discharge capacity three parameter matching are better, and the pressure of the drill is more steady, have realized that at last condom mills; Cover mills degree of depth 263.7m, hole deviation 11.2 degree.The anti-application of cutting the cover milling head of ball has obtained good result, has fully represented the superiority of conventional cover milling head in practical application of this instrument.
Claims (1)
1. a directional well is got and is applied mechanically the anti-cover milling head of cutting of ball; Comprise body (5); The front end of body (5) is provided with cutter hub (2), cutter tooth (1), it is characterized in that: described cutter hub (2) inner edge has chamfering, and described each cutter tooth (1) is provided with steel ball (3) and stifled (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011204447779U CN202300267U (en) | 2011-11-11 | 2011-11-11 | Ball anti-cutting milling head for taking directional well casing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011204447779U CN202300267U (en) | 2011-11-11 | 2011-11-11 | Ball anti-cutting milling head for taking directional well casing |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202300267U true CN202300267U (en) | 2012-07-04 |
Family
ID=46369189
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011204447779U Expired - Fee Related CN202300267U (en) | 2011-11-11 | 2011-11-11 | Ball anti-cutting milling head for taking directional well casing |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202300267U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103643903A (en) * | 2013-12-03 | 2014-03-19 | 中国石油天然气股份有限公司 | Inside and outside centering guide for well repair in oil field |
| CN103643915A (en) * | 2013-12-03 | 2014-03-19 | 中国石油天然气股份有限公司 | Composite casing cutter head for well repair in oil field |
-
2011
- 2011-11-11 CN CN2011204447779U patent/CN202300267U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103643903A (en) * | 2013-12-03 | 2014-03-19 | 中国石油天然气股份有限公司 | Inside and outside centering guide for well repair in oil field |
| CN103643915A (en) * | 2013-12-03 | 2014-03-19 | 中国石油天然气股份有限公司 | Composite casing cutter head for well repair in oil field |
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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: 20120704 Termination date: 20161111 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |