CN104234649B - Straddle method is entered under a kind of Multilateral Wells employment shape sealing device - Google Patents
Straddle method is entered under a kind of Multilateral Wells employment shape sealing device Download PDFInfo
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- CN104234649B CN104234649B CN201410441195.3A CN201410441195A CN104234649B CN 104234649 B CN104234649 B CN 104234649B CN 201410441195 A CN201410441195 A CN 201410441195A CN 104234649 B CN104234649 B CN 104234649B
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- 238000000034 method Methods 0.000 title claims abstract description 17
- 238000007789 sealing Methods 0.000 title claims abstract description 13
- 210000003141 lower extremity Anatomy 0.000 claims abstract description 19
- 238000005553 drilling Methods 0.000 claims abstract description 5
- 238000000926 separation method Methods 0.000 claims abstract description 4
- 230000000694 effects Effects 0.000 claims description 5
- 239000007789 gas Substances 0.000 abstract description 4
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 abstract description 4
- 238000010276 construction Methods 0.000 abstract description 3
- 239000003245 coal Substances 0.000 abstract description 2
- 239000003345 natural gas Substances 0.000 abstract description 2
- 238000005516 engineering process Methods 0.000 description 3
- 238000009434 installation Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
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Abstract
The present invention relates to a kind of oil, natural gas, shale gas and coal bed gas and bore completion method, enter straddle method particularly under a kind of Multilateral Wells employment shape sealing device.The method step is as follows: after two branch well cylinder finishing drillings of Multilateral Wells, edge under branch well window is formed at branch well window, fixed point leg-separating mechanism top is taper or wedge shape, and round and smooth chamfering is arranged at this taper or wedge shape top, fixed point leg-separating mechanism is installed on the top on edge under branch well window, guarantee chev(e)ron seal device lower under branch well window along front 2 the lower limb reliable separation of tip, it is to avoid chev(e)ron seal device is damaged.Two the lower limb separating rates that present invention achieves chev(e)ron seal device are Tong Bu with tubing string running speed, avoid blocked portion problem, prevent chev(e)ron seal device to be in compressed state buckling deformation and squeeze heap, it is ensured that chev(e)ron seal device is reliably lowered into position, simple in construction, easy and simple to handle.
Description
Technical field:
The present invention relates to a kind of oil, natural gas, shale gas and coal bed gas and bore completion method, particularly to one
Plant and enter straddle method under Multilateral Wells employment shape sealing device.
Background technology:
Along with the fast development of Multilateral Wells technology, the hydraulic seal that branch well window connects requires the most increasingly
High.Use of existing high-level Multilateral Wells technology first installs chev(e)ron seal device more in down-hole, is then drilled to many
The mode of individual branch, therefore structure orientation and the depth accuracy of window Chu Ge branch are less demanding, seal dress
Put installation relatively simple.But the mode of the high-level Multilateral Wells of this structure is only applicable to new well, and there is window
The shortcoming that mouth intensity is low.The most first completing two branch well hole drilling wells, the later stage enters herringbone under window
Sealing device builds the method for Multilateral Wells, is applicable not only to new well, and is applicable to old well, and window intensity
Higher.But owing to the running speed of chev(e)ron seal device and the straddle speed of chev(e)ron seal device are inconsistent,
Easily there is blocked portion problem, for how realizing can entering on the lower of later stage chev(e)ron seal device with straddle being all the time
Insoluble problem.
Summary of the invention:
The technical problem to be solved in the present invention is to provide under a kind of Multilateral Wells employment shape sealing device and enters straddle side
Method, two the lower limb separating rates the method achieving chev(e)ron seal device are Tong Bu with tubing string running speed, keep away
Exempt from blocked portion problem, prevent chev(e)ron seal device to be in compressed state buckling deformation and squeeze heap, it is ensured that people
Shape sealing device is reliably lowered into position, and simple in construction is easy and simple to handle.Overcome existing chev(e)ron seal dress
The running speed put is inconsistent with the straddle speed of chev(e)ron seal device, and the deficiency of blocked portion problem easily occurs.
The technical solution used in the present invention is: enter straddle method under a kind of Multilateral Wells employment shape sealing device,
The method step is as follows: after two branch well cylinder finishing drillings of Multilateral Wells, forms Multilateral Wells at branch well window
Lower window edge, fixed point leg-separating mechanism top is taper or wedge shape, and round and smooth chamfering is arranged at this taper or wedge shape top,
Fixed point leg-separating mechanism is installed on the top on edge under branch well window, it is ensured that chev(e)ron seal device divides lower arriving
Prop up front 2 the lower limb reliable separation of well lower window edge tip, it is to avoid chev(e)ron seal device is damaged；Fixed point point
Leg mechanism is positioned at outside chev(e)ron seal device, or fixed point leg-separating mechanism is arranged on chev(e)ron seal device
In the middle of two lower limbs；Chev(e)ron seal device is connected with feeder by rigidity tubing string, it is ensured that chev(e)ron seal
Device is generally in axial tension state；Under fashionable, make two lower limbs of chev(e)ron seal device be respectively aligned to mesh
Well, when two lower limb bifurcations of chev(e)ron seal device touch fixed point leg-separating mechanism time, at traction force
Under effect, 2 lower limbs are forced to separate with feeding speed sync, and enter in corresponding well, make chev(e)ron seal fill
Put reliable installation to put in place.
The invention has the beneficial effects as follows: due to the fact that and have employed fixed point leg-separating mechanism, thus there is herringbone
The effect that two lower limb separating rates of sealing device are Tong Bu with tubing string running speed, it is to avoid blocked portion problem occurs,
Prevent chev(e)ron seal device to be in compressed state buckling deformation and squeeze heap, it is ensured that chev(e)ron seal device is reliable
It is lowered into position, simple in construction, easy and simple to handle.
Accompanying drawing illustrates:
The present invention will be further described in detail with detailed description of the invention below in conjunction with the accompanying drawings.
Fig. 1 is the schematic diagram of the present invention.
Detailed description of the invention:
As it is shown in figure 1, enter straddle method under a kind of Multilateral Wells employment shape sealing device, the method step is such as
Under: after two branch well cylinder finishing drillings of Multilateral Wells, formed under branch well window along 3 at branch well window, fixed
Point leg-separating mechanism 2 top is taper or wedge shape, and round and smooth chamfering is arranged at this taper or wedge shape top, by fixed point point
Leg mechanism 2 is installed under branch well window the top along 3, it is ensured that chev(e)ron seal device 1 lower to branch
Front 2 the lower limb reliable separation of well lower window edge 3 tip, it is to avoid chev(e)ron seal device 1 is damaged；Herringbone
Shape sealing device 1 is manufactured by high-ductility material, has preferable deformability and without breakage；Fixed point straddle machine
It is outside that structure 2 is positioned at chev(e)ron seal device 1, or fixed point leg-separating mechanism 2 is arranged on chev(e)ron seal device 1
Two lower limbs in the middle of；Chev(e)ron seal device 1 is connected with feeder by rigidity tubing string, it is ensured that herringbone
Sealing device 1 is generally in axial tension state；Under fashionable, make two lower limbs of chev(e)ron seal device 1 divide
Not Dui Zhun purpose well, when two lower limb bifurcations of chev(e)ron seal device 1 touch fixed point leg-separating mechanism 2
Time, under traction force effect, 2 lower limbs are forced to separate with feeding speed sync, and enter in corresponding well, make
Chev(e)ron seal device 1 is reliably installed and is put in place.
It is understood that above with respect to the specific descriptions of the present invention, be merely to illustrate the present invention and be not subject to
It is limited to the technical scheme described by the embodiment of the present invention, it will be understood by those within the art that, still
The present invention can be modified or equivalent, to reach identical technique effect；Need are used as long as meeting
Want, all within protection scope of the present invention.
Claims (1)
1. enter straddle method under a Multilateral Wells employment shape sealing device, it is characterised in that: the method step
As follows: after two branch well cylinder finishing drillings of Multilateral Wells, formed at branch well window along (3) under branch well window,
Fixed point leg-separating mechanism (2) top is taper or wedge shape, and round and smooth chamfering is arranged at this taper or wedge shape top, will be fixed
Point leg-separating mechanism (2) is installed under branch well window the top along (3), it is ensured that chev(e)ron seal device (1)
Lower to edge front 2 the lower limb reliable separation of (3) tip under branch well window, it is to avoid chev(e)ron seal device
(1) damaged；It is outside that fixed point leg-separating mechanism (2) is positioned at chev(e)ron seal device (1), or fixed point straddle
Mechanism (2) is arranged in the middle of two lower limbs of chev(e)ron seal device (1)；Chev(e)ron seal device (1) leads to
Cross rigidity tubing string to be connected with feeder, it is ensured that chev(e)ron seal device (1) is generally in axial tension state；
Under fashionable, make two lower limbs of chev(e)ron seal device (1) be respectively aligned to purpose well, when chev(e)ron seal fill
Put two lower limb bifurcations of (1) when touching fixed point leg-separating mechanism (2), under traction force effect, 2 lower limbs
It is forced to separate with feeding speed sync, and enters in corresponding well, make chev(e)ron seal device (1) reliably pacify
Install to position.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410441195.3A CN104234649B (en) | 2014-09-02 | 2014-09-02 | Straddle method is entered under a kind of Multilateral Wells employment shape sealing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410441195.3A CN104234649B (en) | 2014-09-02 | 2014-09-02 | Straddle method is entered under a kind of Multilateral Wells employment shape sealing device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104234649A CN104234649A (en) | 2014-12-24 |
| CN104234649B true CN104234649B (en) | 2016-09-28 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410441195.3A Active CN104234649B (en) | 2014-09-02 | 2014-09-02 | Straddle method is entered under a kind of Multilateral Wells employment shape sealing device |
Country Status (1)
| Country | Link |
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| CN (1) | CN104234649B (en) |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6732801B2 (en) * | 1996-03-11 | 2004-05-11 | Schlumberger Technology Corporation | Apparatus and method for completing a junction of plural wellbores |
| CN101413384A (en) * | 2008-11-24 | 2009-04-22 | 中国石油集团长城钻探工程有限公司 | Method for sealing branch well window by using metal expansion pipe |
| CN201661264U (en) * | 2009-11-17 | 2010-12-01 | 中国石油集团长城钻探工程有限公司 | Hexalateral well downhole bifurcation mechanism sealing device |
| CN101748989A (en) * | 2009-12-15 | 2010-06-23 | 中国石油集团长城钻探工程有限公司 | Branch well window sealing method |
| CN201908572U (en) * | 2010-12-17 | 2011-07-27 | 中国石油集团长城钻探工程有限公司 | Modular combined whipstock |
| US9249559B2 (en) * | 2011-10-04 | 2016-02-02 | Schlumberger Technology Corporation | Providing equipment in lateral branches of a well |
| US10392904B2 (en) * | 2013-02-12 | 2019-08-27 | Schlumberger Technology Corporation | Lateral junction for use in a well |
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2014
- 2014-09-02 CN CN201410441195.3A patent/CN104234649B/en active Active
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| CN104234649A (en) | 2014-12-24 |
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Effective date of registration: 20200928 Address after: 100120 Beijing Xicheng District six laying Kang Patentee after: CHINA NATIONAL PETROLEUM Corp. Patentee after: China National Petroleum Corporation Great Wall Drilling Engineering Co.,Ltd. Address before: 124010 Xinglongtai, Liaoning Province, oil street, No. 96, No. Patentee before: China National Petroleum Corporation Great Wall Drilling Engineering Co.,Ltd. |