CN203594379U - Flexible unit dedicated for ultra-short radius drilling well completion - Google Patents
Flexible unit dedicated for ultra-short radius drilling well completion Download PDFInfo
- Publication number
- CN203594379U CN203594379U CN201320838675.4U CN201320838675U CN203594379U CN 203594379 U CN203594379 U CN 203594379U CN 201320838675 U CN201320838675 U CN 201320838675U CN 203594379 U CN203594379 U CN 203594379U
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- Prior art keywords
- connecting rod
- ultra
- flexible unit
- short radius
- ball
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- Expired - Lifetime
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- 238000005553 drilling Methods 0.000 title abstract description 12
- 230000000694 effects Effects 0.000 abstract description 5
- 238000007789 sealing Methods 0.000 abstract description 5
- 238000005452 bending Methods 0.000 abstract description 3
- 239000012530 fluid Substances 0.000 abstract description 3
- 238000000034 method Methods 0.000 description 3
- 239000003921 oil Substances 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000000295 fuel oil Substances 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 238000012795 verification Methods 0.000 description 1
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Abstract
The utility model relates to a flexible unit dedicated for ultra-short radius drilling well completion. The flexible unit dedicated for the ultra-short radius drilling well completion comprises a bulb connecting rod (2), a shell (3), an inner sleeve (4), a spherical bearing (8) and a ball seat (9), the bulb connecting rod (2) is arranged in the shell (3), the bulb connecting rod (2) is further sleeved with the inner sleeve (4), the top end of the bulb connecting rod (2) is mounted in the spherical bearing (8) in a seated mode, the spherical bearing (8) is mounted on the ball seat (9), and a spline shaft (10) is arranged at the bottom end of the bulb connecting rod (2). The flexible unit dedicated for the ultra-short radius drilling well completion achieves free bending and the functions of transmitting bit pressure and torque through the structure of collecting flexible units end to end, all components are provided with O-type sealing rings, sealing without pressure leakage can be achieved, circulation of drilling fluid in an inner cavity is not influenced, the curvature radius for well drilling by using the device can be reduced greatly, machine running is stable, and the application effect is good.
Description
Technical field
The utility model belongs to petroleum machinery field, relates to drilling tool, and particularly a kind of ultra-short radius bores completion Special flexible unit.
Background technology
At present, in the exploitation in oil field, horizontal well drilling obtains extensive high-speed development, cannot develop by the method for straight well for some special oil reservoirs or when benefit is very low usage level well often income is obvious, particularly all the more so at some vertically fractured wells, precipitous one-tenth oil reservoir and heavy oil tested layer.And horizontal wells is mainly to utilize the flexibility of drilling tool itself, the radius of curvature therefore forming is larger, the work difficulty while having increased operation.The radius of curvature of for this reason, how to dwindle horizontal well is the problem that we will solve.
Summary of the invention
The purpose of this utility model is to provide a kind of ultra-short radius and bores completion Special flexible unit, solves the larger problem of hole curvature radius that present Horizontal Well Drilling well tool utilizes drilling tool deflecting to form.
The utility model is achieved through the following technical solutions: a kind of ultra-short radius bores completion Special flexible unit, comprise ball head connecting rod, housing, inner sleeve, ball bearing and ball seat, ball head connecting rod is placed in housing, outside is also set with inner sleeve, the top of ball head connecting rod is sat and is contained in ball bearing, ball bearing is contained on ball seat, and the bottom of ball head connecting rod is splined shaft.
O RunddichtringO is also equipped with on described ball head connecting rod top.
This device also comprises jackscrew, and jackscrew is contained on ball seat and inwardly withstands inner sleeve.
On described housing, be also set with supporting positive cover, between supporting positive cover and housing, roller bearing be housed.
Adopt the good effect of technique scheme: the utility model is by an end to end joint joint flexible unit structure, realize the function of can free bend simultaneously transmitting the pressure of the drill and moment of torsion, and each parts are all equipped with O RunddichtringO, can realize again sealing and not leak pressure, do not affect circulating fluid in inner chamber, use not only drilling well radius of curvature of this device significantly to be reduced, and machine run is steady, effect is good.
Accompanying drawing explanation
Fig. 1 is structural representation of the present utility model.
In figure, 1 O RunddichtringO, 2 ball head connecting rods, 3 housings, 4 inner sleeves, 5 supporting positive covers, 6 roller bearings, 7 jackscrews, 8 ball bearings, 9 ball seats, 10 splined shafts.
The specific embodiment
below in conjunction with accompanying drawing, the technical solution of the utility model is described further, but should not be construed as restriction of the present utility model:
Fig. 1 is structural representation of the present utility model, as shown in the figure, a kind of ultra-short radius bores completion Special flexible unit, major function is transmitting torque and the pressure of the drill under the state of flexible bending, this device comprises ball head connecting rod 2, housing 3, inner sleeve 4, ball bearing 8 and ball seat 9, ball head connecting rod 2 is placed in housing 3, outside is also set with inner sleeve 4, the top of ball head connecting rod 2 is sat and is contained in ball bearing 8, ball bearing 8 is contained on ball seat 9, the bottom of ball head connecting rod 2 is splined shaft 10, the splined shaft of each joint all just in time aligns connection with the ball head connecting rod top of next joint, each flexible unit joins end to end and just can form the axle core segment of random length flexible drill string like this, and ball head connecting rod is contained on ball bearing, form a Universal toggle joint spherical hinge structure, it is convenient to make to rotate, whole flexible drill string can free bend, greatly dwindle radius of curvature.
O RunddichtringO 1 is also equipped with on described ball head connecting rod 2 tops, mainly plays and guarantees down that in working order interior external seal does not leak the effect of pressure.
In order to lock not back-off, and realize universal transferring power, prevent from that each short circuit from twisting to channel bit, transmit smoothly the pressure of the drill and moment of torsion, this device has also designed jackscrew 7, and jackscrew 7 is contained on ball seat 9 and inwardly withstands inner sleeve 4.
In addition, on described housing 3, be also set with supporting positive cover 5, between supporting positive cover 5 and housing 3, roller bearing 6 be housed, be used for the instrument that reaches righting and reduce to greatest extent the object of rotation friction in rotary operation by supporting positive cover and roller bearing.
The power that the utility model transmits by top in use, exert pressure to flexible unit, each flexible unit is end to end, both can produce bending, and accept again transmitting torque, and each parts there is O RunddichtringO, can realize sealing, do not affect circulating fluid in inner chamber, outside have again the supporting positive cover with bearing, and spin friction resistance is little.Itself can form angle of bend more than 4 degree this device, and radius of curvature only has 2.8 meters, is to realize the key structure that has free bend characteristic and reduce radius of curvature under torsion pass state.This device has passed through on-the-spot application verification, in northern 1-3-fourth 76, reliable and stable in the use procedure in northern 3-1-fourth 42 wells, smooth running, transmission and sealing effectiveness all good, frictional resistance is little, has obtained good effect.
Claims (4)
1. a ultra-short radius bores completion Special flexible unit, it is characterized in that: comprise ball head connecting rod (2), housing (3), inner sleeve (4), ball bearing (8) and ball seat (9), ball head connecting rod (2) is placed in housing (3), outside is also set with inner sleeve (4), the top of ball head connecting rod (2) is sat and is contained in ball bearing (8), it is upper that ball bearing (8) is contained in ball seat (9), and the bottom of ball head connecting rod (2) is splined shaft (10).
2. ultra-short radius according to claim 1 bores completion Special flexible unit, it is characterized in that: O RunddichtringO (1) is also equipped with on described ball head connecting rod (2) top.
3. ultra-short radius according to claim 1 bores completion Special flexible unit, it is characterized in that: also comprise jackscrew (7), jackscrew (7) is contained in ball seat (9) above and inwardly withstands inner sleeve (4).
4. ultra-short radius according to claim 1 bores completion Special flexible unit, it is characterized in that: on described housing (3), be also set with supporting positive cover (5), between supporting positive cover (5) and housing (3), roller bearing (6) be housed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320838675.4U CN203594379U (en) | 2013-12-19 | 2013-12-19 | Flexible unit dedicated for ultra-short radius drilling well completion |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320838675.4U CN203594379U (en) | 2013-12-19 | 2013-12-19 | Flexible unit dedicated for ultra-short radius drilling well completion |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203594379U true CN203594379U (en) | 2014-05-14 |
Family
ID=50675274
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320838675.4U Expired - Lifetime CN203594379U (en) | 2013-12-19 | 2013-12-19 | Flexible unit dedicated for ultra-short radius drilling well completion |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203594379U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109915086A (en) * | 2019-04-08 | 2019-06-21 | 海油来博(天津)科技股份有限公司 | A kind of segmented flexibility sand control screen |
-
2013
- 2013-12-19 CN CN201320838675.4U patent/CN203594379U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109915086A (en) * | 2019-04-08 | 2019-06-21 | 海油来博(天津)科技股份有限公司 | A kind of segmented flexibility sand control screen |
| CN109915086B (en) * | 2019-04-08 | 2023-09-26 | 海油来博(天津)科技股份有限公司 | Sectional type flexible sand control screen pipe |
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| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |