CN2672275Y - Hole enlarging pilot bit - Google Patents
Hole enlarging pilot bit Download PDFInfo
- Publication number
- CN2672275Y CN2672275Y CN 200320104924 CN200320104924U CN2672275Y CN 2672275 Y CN2672275 Y CN 2672275Y CN 200320104924 CN200320104924 CN 200320104924 CN 200320104924 U CN200320104924 U CN 200320104924U CN 2672275 Y CN2672275 Y CN 2672275Y
- Authority
- CN
- China
- Prior art keywords
- hole
- utility
- eye
- expanding device
- model
- 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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- Earth Drilling (AREA)
Abstract
The utility model relates to a hole expanding drill bit which is composed of an upper joint 1, a body 2, a tooth support 3, a hydraulic hole expanding device 4, a tooth wheel 5, a lead cone 6, diameter protecting teeth 7 and a water eye 8. Because the utility model adopts that a bending joint and a back tooth wheel connected with the hydraulic hole expanding device can act to a well wall, a new eye is prevented from being expanded in the process of expending a hole through the strengthening function of a novel drill bit additionally arranged at the lower end of the hydraulic hole expanding device. The structure of the utility model is similar to the bending joint, and meanwhile, a well eye is carried out once micro-step hole expansion before a hole expending blade acts by using the expanding function of the bending joint. Thus, the speed of hole expansion can be improved, the skipping degree of the hole expanding device is reduced, and the service life of the blade is prolonged.
Description
Technical field:
The utility model relates to the boring tool that uses on a kind of oil drilling, particularly a kind of reaming pilot bit.
Background technology:
The sidetracked hole technology is applied in each oil field, the whole nation on a large scale with characteristics such as its small investment, instant effects in recent years, is the development that the sidetracked hole counter-boring techniques of purpose has also obtained farm labourer's foot to enlarge annular clearance correspondingly.Reasons such as there is shoulder in normal the discovery owing to inclination section in actual reaming process, and hole diameter is irregular, the engineering accident that occurs expanding the eye that makes new advances easily, and blade is low application life.Reduce the success rate of reaming speed and reaming, improved the oil well cost.
Technical scheme:
The purpose of this utility model is to provide a kind of reaming pilot bit.It can prevent from new eye to occur effectively in oil well reaming process, improves the success rate that reaming speed improves reaming, reduces accident rate, has reduced the oil well cost.
The purpose of this utility model is achieved in that it is made up of top connection (1), body (2), bit leg (3), hydraulic type reamer (4), gear wheel (5), leading cone (6), gauge teeth (7), hydrophthalmia (8), and top connection (1) links to each other with body (2); Hydraulic type reamer (4) is arranged in the body (2), and the outside is connected to bit leg (3), gear wheel (5), and the bottom is to be connected to gauge teeth (7) on leading cone (6), the leading cone (6), lower accepting water eye (8).
During work, the maximum outside diameter of gear wheel is slightly less than the maximum outside diameter of reamer body; By means of the effect of bent sub, the back gear wheel that links to each other with the hydraulic type reamer can act on the borehole wall; The leading cone size plays centralizing function less than this body diameter, prevents to expand the eye that makes new advances.
Gear wheel can act on the borehole wall to the utility model owing to having adopted bent sub and having linked to each other afterwards with the hydraulic type reamer; The centralizing function of the novel pilot bit of the lower end by being installed at the hydraulic type reamer, prevent in the reaming process, expand the eye that makes new advances, and the similar bent sub of structure of the present utility model, can also utilize simultaneously the expansion effect of drawing of bent sub, before the reaming blade works, well is carried out once little step reaming, therefore can improve reaming speed and the jumping degree of spraining that reduces reamer, prolonged blade life.
Description of drawings:
Accompanying drawing is a structural representation of the present utility model.
Below in conjunction with accompanying drawing the utility model is further specified.
Embodiment:
As shown in the figure: it is made up of top connection 1, body 2, bit leg 3, hydraulic type reamer 4, gear wheel 5, leading cone 6, gauge teeth 7, hydrophthalmia 8, links to each other with hydraulic type reamer 4 curved connecing by top connection 1; The maximum outside diameter of gear wheel 5 is slightly less than the maximum outside diameter of reamer body; By means of the effect of bent sub, the back gear wheel 5 that links to each other with the hydraulic type reamer can act on the borehole wall; Leading cone 6 sizes play centralizing function less than body 2 external diameters, prevent to expand the eye that makes new advances.
Claims (2)
1, a kind of reaming pilot bit, it is made up of top connection (1), body (2), bit leg (3), hydraulic type reamer (4), gear wheel (5), leading cone (6), gauge teeth (7), hydrophthalmia (8), it is characterized in that: top connection (1) links to each other with body (2); Hydraulic type reamer (4) is arranged in the body (2), and outer Side is connected to bit leg (3), gear wheel (5), and the bottom is to be connected to gauge teeth (7) on leading cone (6), the leading cone (6), lower accepting water eye (8).
2, a kind of reaming pilot bit according to claim 1 is characterized in that:
Top connection (1) links to each other with curved the connecing of hydraulic type reamer (4); The maximum outside diameter of gear wheel (5) is less than the maximum outside diameter of reamer body (2), and leading cone (6) size is less than body (2) external diameter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200320104924 CN2672275Y (en) | 2003-10-16 | 2003-10-16 | Hole enlarging pilot bit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200320104924 CN2672275Y (en) | 2003-10-16 | 2003-10-16 | Hole enlarging pilot bit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2672275Y true CN2672275Y (en) | 2005-01-19 |
Family
ID=34474321
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200320104924 Expired - Fee Related CN2672275Y (en) | 2003-10-16 | 2003-10-16 | Hole enlarging pilot bit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2672275Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102635315A (en) * | 2012-04-27 | 2012-08-15 | 中国地质大学（武汉） | Joint with hole-repairing drill bit |
| CN108603397A (en) * | 2016-01-28 | 2018-09-28 | 斯伦贝谢技术有限公司 | Underreamer wing |
| US11002080B2 (en) | 2016-01-28 | 2021-05-11 | Schlumberger Technology Corporation | Staged underreamer cutter block |
-
2003
- 2003-10-16 CN CN 200320104924 patent/CN2672275Y/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102635315A (en) * | 2012-04-27 | 2012-08-15 | 中国地质大学（武汉） | Joint with hole-repairing drill bit |
| CN108603397A (en) * | 2016-01-28 | 2018-09-28 | 斯伦贝谢技术有限公司 | Underreamer wing |
| US11002080B2 (en) | 2016-01-28 | 2021-05-11 | Schlumberger Technology Corporation | Staged underreamer cutter block |
| US11225838B2 (en) | 2016-01-28 | 2022-01-18 | Schlumberger Technology Corporation | Underreamer cutter block |
| US11814903B2 (en) | 2016-01-28 | 2023-11-14 | Schlumberger Technology Corporation | Staged underreamer cutter block |
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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 |