CN108625780B - Eccentric positioning device suitable for radial drilling - Google Patents
Eccentric positioning device suitable for radial drilling Download PDFInfo
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- CN108625780B CN108625780B CN201710176783.2A CN201710176783A CN108625780B CN 108625780 B CN108625780 B CN 108625780B CN 201710176783 A CN201710176783 A CN 201710176783A CN 108625780 B CN108625780 B CN 108625780B
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- joint
- eccentric
- drilling
- steering gear
- positioning device
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Classifications
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B7/00—Special methods or apparatus for drilling
- E21B7/04—Directional drilling
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- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- General Details Of Gearings (AREA)
- Earth Drilling (AREA)
Abstract
The invention relates to the field of oil and gas extraction tools, in particular to an eccentric positioning device suitable for radial drilling, which comprises a drilling steering gear 1 and an eccentric joint 6 which are sequentially connected up and down, wherein the drilling steering gear 1 is matched with a drill bit centralizing sleeve 2, and the upper joint and the lower joint of the eccentric joint 6 are not on the same axis and are of an eccentric structure; a movable joint 3 is also connected between the drilling steering gear 1 and the eccentric joint 6; the movable joint 3 comprises an upper joint connected with the drilling steering gear 1 and a lower joint connected with the eccentric joint 6, and a rotation positioning lock is formed between the upper joint and the lower joint through a rotation stopping gasket 4 and a set screw 5. The device can effectively utilize the steering gear that is applicable to small-size sheathed tube, need not to change the steering gear when radial drilling in the large-size sheathed tube, makes the drill bit right cover press close to the large-size sleeve wall through eccentric positioning device, accomplishes radial drilling construction.
Description
Technical Field
The invention relates to an eccentric positioning device, which relates to the field of oil layer casing drilling, and after drilling, a hose enters an oil layer through a drilled casing hole by means of hydraulic action, so that an oil flow channel is established. In particular, the radial drilling tool can still enable the drill bit centralizing sleeve to be clung to the oil casing pipe in the large-size oil casing pipe, and is convenient for drilling the oil casing pipe.
Background
The radial drilling technology is an important measure for increasing the production of the oil and gas well, and has good effect on the improvement of the production of the low-permeability oil and gas reservoir. A diverter commonly used in casing radial drilling applications requires that the drill bit centralizer be held against the casing wall during radial drilling so that the casing can be drilled. However, when radial drilling is performed in a large-size casing, the drill bit centralizing sleeve cannot be close to the casing due to the increase of the inner diameter of the casing, and the original radial drilling tool cannot be suitable for the construction in the large-size casing.
The usual solution is to replace the large-size radial drill diverter, but this approach does not make efficient use of the existing small-size diverter, resulting in waste.
Disclosure of Invention
Aiming at the problems existing in the prior art, the invention provides an eccentric positioning device suitable for radial drilling, which is suitable for drilling construction of casing inner diameters of different sizes. By using the eccentric positioning device, the radial drilling construction of the casings with different sizes is completed without changing the steering gear, and a simple and effective device is provided for the radial drilling construction in the casings with large sizes.
In order to achieve the above purpose, the present invention adopts the following technical scheme:
an eccentric positioning device suitable for radial drilling comprises a drilling steering gear 1 and an eccentric joint 6 which are sequentially connected up and down, wherein the drilling steering gear 1 is matched with a drill bit centralizing sleeve 2, and the upper joint and the lower joint of the eccentric joint 6 are not positioned on an axis and are of an eccentric structure; a movable joint 3 is also connected between the drilling steering gear 1 and the eccentric joint 6; the movable joint 3 comprises an upper joint connected with the drilling steering gear 1 and a lower joint connected with the eccentric joint 6, and a rotation positioning lock is formed between the upper joint and the lower joint through a rotation stopping gasket 4 and a set screw 5.
The structure of the anti-rotation gasket 4 comprises an upper surface, a lower surface and clamp teeth which are mutually meshed on the two surfaces.
The jaw shape includes a trapezoid or a triangular cone.
The device mainly comprises a drilling steering gear, a drill bit centralizing sleeve, a movable joint, a rotation stopping gasket, a set screw, an eccentric joint and the like. A movable joint is additionally arranged between the drilling steering gear and the eccentric joint, a set screw and a rotation stopping gasket are loosened, the movable joint is adjusted, the eccentric side of the eccentric joint is aligned with the drill bit centering sleeve in one direction, and the set screw is tightened.
The invention has the advantages that: the drill bit is righted and sleeved in the large-size sleeve to be close to the sleeve wall under the condition that the steering gear is not required to be replaced, so that radial drilling construction of the sleeves with different sizes is completed, the construction cost is reduced, and the application range of the steering gear is improved.
Drawings
FIG. 1 is a schematic illustration of an eccentric positioning device adapted for radial drilling;
the drilling device comprises a drilling steering device 1, a drill bit centralizing sleeve 2, a movable joint 3, a rotation stopping gasket 4, a set screw 5, an eccentric joint 6, a sleeve 7 and an oil pipe anchor 8.
FIG. 2 is a schematic diagram of the shape of the jaws of the anti-rotation pad;
the clamp teeth on the two sides of the rotation-stopping pad have various tooth shapes, and have trapezoidal teeth or triangular teeth.
Detailed Description
The invention is further described with reference to fig. 1 of the accompanying drawings.
The eccentric positioning device suitable for radial drilling is shown in fig. 1, and comprises a drilling steering device 1, an eccentric joint 6 and a tubing anchor 8 which are sequentially connected from top to bottom, wherein the drilling steering device 1 is matched with a drill bit centralizing sleeve 2, and the upper joint and the lower joint of the eccentric joint 6 are not on the same axis and are of an eccentric structure; a movable joint 3 is also connected between the drilling steering gear 1 and the eccentric joint 6; the movable joint 3 comprises an upper joint connected with the drilling steering gear 1 and a lower joint connected with the eccentric joint 6, and a rotation positioning lock is formed between the upper joint and the lower joint through a rotation stopping gasket 4 and a set screw 5.
The structure of the anti-rotation gasket 4 comprises an upper surface, a lower surface and clamp teeth which are mutually meshed on the two surfaces.
The clamp tooth shape comprises a straight trapezoid or a triangle cone.
The eccentric positioning device suitable for radial drilling comprises the following positioning processes: connecting the drilling steering gear with an eccentric joint, and connecting an oil pipe anchor below the eccentric joint; after the connection is finished, observing whether the eccentric sides of the drill centering sleeve and the eccentric joint are in one direction; if the eccentric joint is not in one direction, the set screw is loosened, the movable joint is adjusted, the eccentric side of the eccentric joint is aligned with the drill bit centralizing sleeve in one direction, the set screw is tightened, and the eccentric joint is fixed through the rotation stopping gasket. And (5) drilling down to a preset well depth, hanging a tubing anchor in a sitting mode, and drilling a casing.
The eccentric positioning device of the embodiment can effectively utilize the existing radial drilling steering gear under the condition that the large-size radial drilling steering gear does not need to be replaced, so that the eccentric positioning device is suitable for radial drilling construction of casings of different sizes.
Claims (3)
1. An eccentric positioning device suitable for radial drilling comprises a drilling steering gear (1) and an eccentric joint (6), wherein the drilling steering gear (1) is matched with a drill bit centralizing sleeve (2), and an upper joint and a lower joint of the eccentric joint (6) are not positioned on an axis and are of an eccentric structure; the method is characterized in that: a movable joint (3) is connected between the drilling steering gear (1) and the eccentric joint (6); the movable joint (3) comprises an upper joint connected with the drilling steering gear (1) and a lower joint connected with the eccentric joint (6), and a rotation positioning lock is formed between the upper joint and the lower joint through a rotation stopping gasket (4) and a set screw (5).
2. An eccentric positioning device adapted for radial drilling as recited in claim 1, wherein: the structure of the rotation-stopping gasket (4) comprises an upper surface, a lower surface and clamp teeth which are mutually meshed on the two surfaces.
3. An eccentric positioning device adapted for radial drilling as recited in claim 2, wherein: the jaw shape includes a trapezoid or a triangular cone.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710176783.2A CN108625780B (en) | 2017-03-23 | 2017-03-23 | Eccentric positioning device suitable for radial drilling |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710176783.2A CN108625780B (en) | 2017-03-23 | 2017-03-23 | Eccentric positioning device suitable for radial drilling |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108625780A CN108625780A (en) | 2018-10-09 |
| CN108625780B true CN108625780B (en) | 2024-02-23 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710176783.2A Active CN108625780B (en) | 2017-03-23 | 2017-03-23 | Eccentric positioning device suitable for radial drilling |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108625780B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113027343B (en) * | 2021-04-12 | 2023-09-29 | 定边县泽林石油工程有限公司 | Eccentric rotary positioning tool |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5040619A (en) * | 1990-04-12 | 1991-08-20 | Halliburton Logging Services, Inc. | Wireline supported perforating gun enabling oriented perforations |
| CN102135011A (en) * | 2011-02-15 | 2011-07-27 | 上海宏睿油气田径向井技术服务有限公司 | Device for pumping coal bed gas through underground radial drilling |
| CN202023504U (en) * | 2011-01-31 | 2011-11-02 | 中国石油化工集团公司 | Rotary eccentric casing drilling device |
| CN104165027A (en) * | 2013-05-16 | 2014-11-26 | 长江大学 | Three-dimensional turbine vibrator for petroleum drilling |
| CN104481399A (en) * | 2014-11-20 | 2015-04-01 | 西南石油大学 | Near-bit well track control tool and control method thereof |
| CN106285472A (en) * | 2015-05-29 | 2017-01-04 | 中石化胜利石油工程有限公司钻井工艺研究院 | A kind of elastic orienting device being applicable to radial bore construction |
| CN206769809U (en) * | 2017-03-23 | 2017-12-19 | 中石化石油工程技术服务有限公司 | A kind of eccentric location device suitable for radial bore |
-
2017
- 2017-03-23 CN CN201710176783.2A patent/CN108625780B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5040619A (en) * | 1990-04-12 | 1991-08-20 | Halliburton Logging Services, Inc. | Wireline supported perforating gun enabling oriented perforations |
| CN202023504U (en) * | 2011-01-31 | 2011-11-02 | 中国石油化工集团公司 | Rotary eccentric casing drilling device |
| CN102135011A (en) * | 2011-02-15 | 2011-07-27 | 上海宏睿油气田径向井技术服务有限公司 | Device for pumping coal bed gas through underground radial drilling |
| CN104165027A (en) * | 2013-05-16 | 2014-11-26 | 长江大学 | Three-dimensional turbine vibrator for petroleum drilling |
| CN104481399A (en) * | 2014-11-20 | 2015-04-01 | 西南石油大学 | Near-bit well track control tool and control method thereof |
| CN106285472A (en) * | 2015-05-29 | 2017-01-04 | 中石化胜利石油工程有限公司钻井工艺研究院 | A kind of elastic orienting device being applicable to radial bore construction |
| CN206769809U (en) * | 2017-03-23 | 2017-12-19 | 中石化石油工程技术服务有限公司 | A kind of eccentric location device suitable for radial bore |
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| Publication number | Publication date |
|---|---|
| CN108625780A (en) | 2018-10-09 |
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