CN204312000U - A kind of drag bit - Google Patents
A kind of drag bit Download PDFInfo
- Publication number
- CN204312000U CN204312000U CN201420639086.8U CN201420639086U CN204312000U CN 204312000 U CN204312000 U CN 204312000U CN 201420639086 U CN201420639086 U CN 201420639086U CN 204312000 U CN204312000 U CN 204312000U
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- casing section
- section mill
- wing
- milling
- welded
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Abstract
The utility model relates to a kind of drag bit, belongs to the well workover of petroleum exploration and development oil-water well and bores milling power tool technical field.The utility model is made up of tubular configured joint, casing section mill, and casing section mill is welded on tubular configured joint lower surface, and casing section mill lower end is cover milling head, is welded with at least one wing in its cavity.Bore in milling work progress, to be circulated workover fluid by turn on pump, the cover milling head of casing section mill and wing are under the effect of the pressure of the drill and moment of torsion, brill milling is carried out to crystallizable minerals such as ash plugs simultaneously, utilize workover fluid that ground is returned out in the chip circulation of boring milling generation, because wing is welded in the cavity of cover milling head of casing section mill lower end, not easily there is blade distortion, obscission, improve production timeliness.
Description
Technical field
The utility model relates to a kind of drag bit.Belong to the well workover of petroleum exploration and development oil-water well and bore milling power tool technical field.
Background technology
In oil well repairing operation process, normal employing drag bit carries out boring ash plug, bores salt, bores the constructions such as blocking agent, wax removal, the cleaning borehole wall, existing drag bit is generally three-winged bit, wing is welded on tubular configured joint bottom, and the area that its junction be combined with each other is less, and torsional strength is low, easily blade distortion is there is in work progress, even there is blade dropping situations time serious, cause down-hole accident, affect construction speed.Patent No. ZL201020618925.X discloses high-efficiency three-scraper drill bit, and its structure is that tubular configured joint lower surface welding blade is capable, there is above-mentioned defect equally.
Summary of the invention
The purpose of this utility model is that the defect there is the easy distortion of blade, coming off, provides a kind of drag bit in order to overcome existing drag bit in brill milling work progress.
The utility model is made up of tubular configured joint, casing section mill, and casing section mill is welded on tubular configured joint lower surface, and casing section mill lower end is cover milling head, is welded with at least one wing in its cavity.
The beneficial effects of the utility model are: bore in milling work progress, to be circulated workover fluid by turn on pump, the cover milling head of casing section mill and wing, under the effect of the pressure of the drill and moment of torsion, carry out brill milling to crystallizable minerals such as ash plugs simultaneously, utilize workover fluid to return out ground by boring the chip circulation that milling produces.Because wing is welded in the cavity of cover milling head of casing section mill lower end, not easily there is blade distortion, obscission, improve production timeliness.
Accompanying drawing explanation
Fig. 1 is the utility model structural representation;
Fig. 2 is A direction view.
Detailed description of the invention
The utility model is made up of tubular configured joint 1, casing section mill 2, and casing section mill 2 is welded on tubular configured joint 1 lower surface, and casing section mill 2 lower end is cover milling head, is welded with at least one wing 3 in its cavity.
Above the lower surface of described wing 3, welding-on has hard alloy blocks.
The cover milling head lower surface of described casing section mill 2 and the lower surface of wing 3 are in same level, can increase casing section mill 2 torsional strength.
Described wing 3 is crosswise, and be welded in the cavity of the cover milling head of casing section mill 2 lower end, not easily distortion comes off.
When boring milling, the utility model is connected with drilling tool of going into the well, to be circulated workover fluid by turn on pump, the cover milling head of casing section mill 2 and wing 3 are under the effect of the pressure of the drill and moment of torsion, brill milling is carried out to crystallizable minerals such as ash plugs simultaneously, workover fluid enters casing section mill 2 inner chamber by drilling rod inner chamber through tubular configured joint 1, by oil jacket annular space, the chip boring milling generation is carried into ground, realize the object of boring plug, because wing 3 is welded in the cavity of the cover milling head of casing section mill 2 lower end, the area that its junction be combined with each other is large, not easily there is blade distortion, obscission occurs, improve production timeliness.
Claims (4)
1. a drag bit, is made up of tubular configured joint (1), casing section mill (2), it is characterized in that: casing section mill (2) is welded on tubular configured joint (1) lower surface, and casing section mill (2) lower end is cover milling head, is welded with at least one wing (3) in its cavity.
2. a kind of drag bit according to claim 1, is characterized in that: above the lower surface of wing (3), welding-on has hard alloy blocks.
3. a kind of drag bit according to claim 1 and 2, is characterized in that: the lower surface of the cover milling head of casing section mill (2) lower end and the lower surface of wing (3) are in same level.
4. a kind of drag bit according to claim 1 and 2, is characterized in that: wing (3) is crosswise, is welded in the cavity of the cover milling head of casing section mill (2) lower end.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420639086.8U CN204312000U (en) | 2014-10-31 | 2014-10-31 | A kind of drag bit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420639086.8U CN204312000U (en) | 2014-10-31 | 2014-10-31 | A kind of drag bit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204312000U true CN204312000U (en) | 2015-05-06 |
Family
ID=53134322
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420639086.8U Active CN204312000U (en) | 2014-10-31 | 2014-10-31 | A kind of drag bit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204312000U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111140201A (en) * | 2020-02-18 | 2020-05-12 | 盐城华亚石油机械制造有限公司 | Special paraffin removal mill shoe for horizontal well screw drilling tool |
-
2014
- 2014-10-31 CN CN201420639086.8U patent/CN204312000U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111140201A (en) * | 2020-02-18 | 2020-05-12 | 盐城华亚石油机械制造有限公司 | Special paraffin removal mill shoe for horizontal well screw drilling tool |
| CN111140201B (en) * | 2020-02-18 | 2022-04-26 | 盐城华亚石油机械制造有限公司 | Special paraffin removal mill shoe for horizontal well screw drilling tool |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |