CN104453776B - Six-level branching well built-in window sealing well completion method - Google Patents
Six-level branching well built-in window sealing well completion method Download PDFInfo
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- CN104453776B CN104453776B CN201410642230.8A CN201410642230A CN104453776B CN 104453776 B CN104453776 B CN 104453776B CN 201410642230 A CN201410642230 A CN 201410642230A CN 104453776 B CN104453776 B CN 104453776B
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- 238000000034 method Methods 0.000 title claims abstract description 21
- 238000007789 sealing Methods 0.000 title abstract 3
- 210000002445 nipple Anatomy 0.000 claims description 13
- 238000005553 drilling Methods 0.000 claims description 9
- 238000003780 insertion Methods 0.000 claims description 7
- 230000037431 insertion Effects 0.000 claims description 7
- 230000015572 biosynthetic process Effects 0.000 claims description 4
- 238000010276 construction Methods 0.000 claims description 4
- 238000003801 milling Methods 0.000 claims description 3
- 239000007787 solid Substances 0.000 claims description 3
- 238000005987 sulfurization reaction Methods 0.000 claims description 3
- 239000000203 mixture Substances 0.000 claims description 2
- 238000005516 engineering process Methods 0.000 abstract description 13
- 230000000638 stimulation Effects 0.000 abstract description 4
- 238000010586 diagram Methods 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 238000011084 recovery Methods 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- ZZUFCTLCJUWOSV-UHFFFAOYSA-N furosemide Chemical compound C1=C(Cl)C(S(=O)(=O)N)=CC(C(O)=O)=C1NCC1=CC=CO1 ZZUFCTLCJUWOSV-UHFFFAOYSA-N 0.000 description 1
- 230000004927 fusion Effects 0.000 description 1
- 238000000227 grinding Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
- 229910000679 solder Inorganic materials 0.000 description 1
- 239000002436 steel type Substances 0.000 description 1
- 230000003319 supportive effect Effects 0.000 description 1
- 230000008961 swelling Effects 0.000 description 1
- 239000004636 vulcanized rubber Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- 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
- E21B29/00—Cutting or destroying pipes, packers, plugs or wire lines, located in boreholes or wells, e.g. cutting of damaged pipes, of windows; Deforming of pipes in boreholes or wells; Reconditioning of well casings while in the ground
- E21B29/06—Cutting windows, e.g. directional window cutters for whipstock operations
-
- 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
- E21B23/00—Apparatus for displacing, setting, locking, releasing or removing tools, packers or the like in boreholes or wells
-
- 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
- E21B29/00—Cutting or destroying pipes, packers, plugs or wire lines, located in boreholes or wells, e.g. cutting of damaged pipes, of windows; Deforming of pipes in boreholes or wells; Reconditioning of well casings while in the ground
- E21B29/10—Reconditioning of well casings, e.g. straightening
Landscapes
- 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)
- Earth Drilling (AREA)
Abstract
The invention relates to the technical field of branching well drill well completion technologies, in particular to a six-level branching well built-in window sealing well completion method. The method includes the following steps that after an orienting hollow deflector is put in a main well, the inclined face of the orienting hollow deflector is aligned with a window in direction, the lower end of the deflector is connected with a mechanical hanging device with the lower end connected with a well completion pipe column is put in a branching well, a protruding key at the upper end of the orienting hollow deflector is matched with a groove in the upper portion of the mechanical hanging device to form self-locking, and mechanical supporting is formed at the crotch of the window. By means of the six-level branching well built-in window sealing well completion method, high-strength mechanical supporting and good waterpower airtightness are provided for the window, the branching well six-level well completion level is achieved, technical support is provided for large-scale application of branching wells, a branching well technology is made to be combined with a later fracturing and stimulation means, single-well yield is further increased, and the adaptability of the branching well technology is improved.
Description
Technical field:
The present invention relates to a kind of branch well drilling completion technique field, close particularly to a kind of embedded window of six-grade branch well
Envelope completion method.
Background technology:
The key technology of Multilateral Wells is hydraulic seal and mechanical support at main borehole and branch well hole window insertion
Performance, the Multilateral Wells technology in existing domestic each oil field has all solved the mechanically supportive of window, can be carried out level Four completion, but with
The promotion and application of Multilateral Wells technology, the single problem of its later stage well stimulation gradually spills cruelly, especially Multilateral Wells with
The fusion of fracturing technique encounters technical bottleneck, so being badly in need of solving window hydraulic seal, level Four completion level is brought up to
Six grades, such Multilateral Wells fracturing technique can be broken through.External six-grade branch well technology is in bifurcation, first passes through expansion
Hole then under enter branching device for multi, well cementation, in the drilling carrying out double branches along the direction of bifurcated, disadvantage of this is that long-time
The drilling of dual-lateral well eye so that branching device for multi is worn and torn, even if pipe is outer cementing the well, but at later stage window, water outlet and stratum should
The impact of power is still very big.
Content of the invention:
The technical problem to be solved in the present invention is to provide a kind of six-grade branch well embedded window aperture seal completion method, the party
Method achieves provides the high mechanical support of intensity and good hydraulic seal to window, realizes six grades of completion ranks of Multilateral Wells,
Application for Multilateral Wells scale provides technical support, so that Multilateral Wells technology is combined with later stage Hydro Fracturing Stimulation Treatment, enters one
Step improves well yield, strengthens the adaptability of Multilateral Wells technology.Overcome existing window hydraulic seal not it is impossible to reach point
The deficiency of Zhi Jingliu level completion rank.
The technical solution used in the present invention is: a kind of embedded window aperture seal completion method of six-grade branch well, the method
Including when the second branch well hole finishing drilling after, it is lowered into main borehole by orienting hollow wedge deflection tool, in the branched pipe expanding branching device for multi
Under enter branch well hole after, branched pipe is carried out with expansion operation from bottom to top, until swollen cone runs to crotch, completes branched pipe
Expansion construction；The method also includes:
First, after the hollow wedge deflection tool of orientation is lowered into main borehole, the inclined-plane alignment windows direction of hollow wedge deflection tool will be oriented,
Then Mechanical suspender lower end being connected completion tubular column is lowered into branch well hole, orients convex key and the machine of hollow wedge deflection tool upper end
The recess on tool hanger top merges formation self-locking, forms mechanical support in window crotch；
2nd, anchor in pipe, orientation pipe nipple, expand branching device for multi and be sequentially connected with from top to bottom, expand branching device for multi by leading
Pipe and branched pipe composition, outside supervisor and branched pipe, all sulfuration has caulking gum, send anchor in pipe, orientation pipe nipple by drilling rod
Enter into down-hole with expanding branching device for multi, the inclined-plane that can accurately will orient by decentralization repeatedly on pipe nipple is built-in with Mechanical suspender
Oriented slopes match, now can determine expand branching device for multi branched pipe direction just align fingers well, then
Upper lifting pipe post, suppress；When hydraulic pressure value reaches 7mpa, branched pipe tilts, and then slow decentralization makes the master of expansion branching device for multi
Pipe and branched pipe insert main borehole and branch well hole respectively, continue to suppress, and until suppressing 20mpa, at this moment supervisor restores established practice
Then cylindrical, the complete distending of bellows of branched pipe lower end is close on Mechanical suspender inwall；Pitching is suppressed makes grappling in pipe
Device anchors on the inwall of Mechanical suspender upper end, continues to suppress and realizes solid tool and give up；
3rd, enter junk mill under, supervisor bottom ground off and made supervisor's insertion, under enter mechanical rotary expansion cone from expanding branching device for multi
Top downwards supervisor is carried out expansion make its expand be affixed on orientation hollow wedge deflection tool inwall on, then enter Multilateral Wells by under tie back stem
Eye, this tie back stem to the variable radial expanding coning row tieback in the bellows being built in branched pipe lower end, when determining tie back stem and reducing
After swollen cone connects, upper lifting pipe post, variable radial expanding cone combines to form swollen cone in bellows with tie back stem, then mechanical upper lifting pipe post
Suppress simultaneously, branched pipe is carried out expand operation, the expansion until completing branched pipe is constructed；Last enter down junk mill again by branch
The ripple bottom of the tube milling of pipe lower end is fallen, and now the main borehole of Multilateral Wells and branch well hole form insertion.
The invention has the beneficial effects as follows: the present invention is due to employing the embedded completion mode expanding branching device for multi, thus gives
Window provides the high mechanical support of intensity and good hydraulic seal；Branched pipe due to expanding branching device for multi is built-in with reducing
Swollen cone, returns slotting variable radial expanding cone using tie back stem, thus overcomes compression swelling branching device for multi under machinery and cross window issue；The present invention is real
Show six grades of completion ranks of Multilateral Wells, the application for Multilateral Wells scale provides technical support, so that Multilateral Wells technology is pressed with the later stage
Split well stimulation to be combined, improve well yield further, strengthen the adaptability of Multilateral Wells technology.
Brief description:
The present invention will be further described in detail with reference to the accompanying drawings and detailed description.
Fig. 1 is the structural representation that Mechanical suspender and the hollow wedge deflection tool of orientation connect.
Fig. 2 is the structural representation of Mechanical suspender.
Fig. 3 is the structural representation orienting hollow wedge deflection tool.
Fig. 4 is the structural representation expanding branching device for multi.
Fig. 5 is to expand the schematic diagram after branching device for multi expands.
Fig. 6 is the structural representation of anchor and orientation pipe nipple in pipe.
Specific embodiment:
As shown in Figure 1, Figure 2, shown in Fig. 3, Fig. 4, Fig. 5, Fig. 6, a kind of embedded window aperture seal completion method of six-grade branch well, should
Method and step is as follows:
First, after the second branch well hole finishing drilling, it is lowered into main borehole by orienting hollow wedge deflection tool 2 first, and will orient
The inclined-plane alignment windows direction of hollow wedge deflection tool 2, the Mechanical suspender 1 then lower end being connected completion tubular column is lowered into Multilateral Wells
Eye, the convex key 11 of hollow wedge deflection tool 2 upper end of orientation is matched with the groove 10 on Mechanical suspender 1 top and merges formation self-locking, in window
Mouth crotch forms mechanical support；
2nd, anchor 7 in pipe, orientation pipe nipple 8, expand branching device for multi and be sequentially connected with from top to bottom, expand branching device for multi by
Supervisor 3 and branched pipe 4 form, supervisor 3 and branched pipe 4 outside all sulfuration have caulking gum, by drilling rod send anchor 7 in pipe,
Orientation pipe nipple 8 and expansion branching device for multi enter into down-hole, can be accurately by the inclined-plane on orientation pipe nipple 8 and machinery by decentralization repeatedly
The built-in oriented slopes of hanger 19 match, and now can determine that the direction of the branched pipe 4 expanding branching device for multi is just aligned
Branch well hole, then upper lifting pipe post, suppress；When hydraulic pressure value reaches 7mpa, branched pipe 4 tilts, then slow decentralization make swollen
The supervisor 3 of swollen branching device for multi and branched pipe 4 insert main borehole and branch well hole respectively, continue to suppress, until suppressing 20mpa,
At this moment supervisor 3 is recovered to regular cylindrical, and the complete distending of bellows 6 of branched pipe 4 lower end is close to Mechanical suspender 1 inwall
On；Pitching is suppressed makes anchor 7 in pipe anchor on Mechanical suspender 1 upper end inwall, continues to suppress and realizes solid tool and give up；
3rd, enter junk mill under, make supervisor 3 insertion by being responsible for 3 bottoms and grinding off, under enter mechanical rotary expansion cone from expanding bifurcated dress
Put top downwards to supervisor 3 carry out expansion make its expand be affixed on orientation hollow wedge deflection tool 2 inwall on, then will under tie back stem enter point
Prop up well, this tie back stem carries out tieback to the variable radial expanding cone 5 in the bellows 6 being built in branched pipe 4 lower end, when determination tie back stem
After connecting with variable radial expanding cone 5, upper lifting pipe post, variable radial expanding cone 5 combines to form swollen cone, Ran Houji with tie back stem in bellows 6
Tool upper lifting pipe post is suppressed simultaneously, branched pipe 4 is carried out with expansion operation from bottom to top, until swollen cone runs to crotch, completes
The expansion construction of branched pipe 4；Finally enter down junk mill again to fall the bellows 6 bottom milling of branched pipe 4 lower end, now Multilateral Wells
Main borehole and branch well hole formed insertion., except the part of vulcanized rubber, other are all by metal for supervisor 3 and branched pipe 4
Hydraulic seal is ensured to micro- magnitude of interference of metal.This embedded Multilateral Wells completion mode expanding branching device for multi, in window
The higher mechanical support of intensity and hydraulic seal can be provided at mouthful.
Fig. 5 is to expand the schematic diagram after branching device for multi expands, and expanding branching device for multi is to pass through preformation using inflatable steel
Type and solder technology are compressing, and forming shape takes branched pipe 4 shape invariance, the method (as Fig. 4) of supervisor 3 compacting；Leading
All vulcanize caulking gum outside pipe 3 and branched pipe 4.Wherein it is responsible for 3 bottoms just swollen with supervisor 3 welding formation using hemispherical compacting
Swollen chamber, branched pipe 4 bottom uses bellows 6 to form annular seal space with branched pipe 4 welding, and is built-in with variable radial expanding in bellows 6
Cone 5.Suppress the branching device for multi that expands after deformation and be responsible for 3 recovery toroidals, branched pipe 4 and master under the action of hydraulic force of 20mpa
Pipe 3 forms 3 ° of fork angle (as Fig. 5), and bellows 6 recovers drum in the presence of hydraulic coupling and is attached to Mechanical suspender 1
Space is provided to variable radial expanding cone 5 self-locking on inwall.
Fig. 6 is the structural representation of anchor 7 and orientation pipe nipple 8 in pipe, and orientation pipe nipple 8 has inclined-plane and Mechanical suspender
Oriented slopes 9 within 1 match, and accurately supervisor 3 and branched pipe 4 can be inserted main borehole and branch well hole respectively.In pipe
Anchor 7 is that a kind of pitching is suppressed and set anchor, using the top being threaded in orientation pipe nipple 8.When expansion branching device for multi
After decentralization puts in place, after suppressing recovery shaping, pitching is suppressed, and in pipe, the slips distending outside anchor 7 is anchored on Mechanical suspender 1
On inwall, continue to suppress and finally realize giving up.
It is understood that above with respect to the specific descriptions of the present invention, being merely to illustrate the present invention and be not limited to this
Technical scheme described by inventive embodiments, it will be understood by those within the art that, still the present invention can be carried out
Modification or equivalent, to reach identical technique effect；As long as meet use needs, all protection scope of the present invention it
Interior.
Claims (1)
1. the embedded window aperture seal completion method of a kind of six-grade branch well, the method includes after the second branch well hole finishing drilling, will
Orient hollow wedge deflection tool (2) and be lowered into main borehole, after entering branch well hole under the branched pipe (4) expanding branching device for multi, to branch
Pipe (4) carries out expansion operation from bottom to top, until swollen cone runs to crotch, completes the expansion construction of branched pipe (4)；It is special
Levy and be: the method also includes:
First, after the hollow wedge deflection tool of orientation (2) is lowered into main borehole, the inclined-plane alignment windows side of hollow wedge deflection tool (2) will be oriented
To the Mechanical suspender (1) then lower end being connected completion tubular column is lowered into branch well hole, orients hollow wedge deflection tool (2) upper end
Convex key (11) match with the groove (10) on Mechanical suspender (1) top merge formation self-locking, form machinery in window crotch
Support；
2nd, anchor (7) in pipe, orientation pipe nipple (8), expand branching device for multi and be sequentially connected with from top to bottom, expand branching device for multi by
Supervisor (3) and branched pipe (4) composition, outside supervisor (3) and branched pipe (4), all sulfuration has caulking gum, is sent in pipe by drilling rod
Anchor (7), orientation pipe nipple (8) and expansion branching device for multi enter into down-hole, accurately can will orient pipe nipple (8) by decentralization repeatedly
On inclined-plane oriented slopes (9) built-in with Mechanical suspender (1) match, now can determine the branch expanding branching device for multi
Pipe (4) direction just align fingers well, then upper lifting pipe post, suppress；Branched pipe (4) when hydraulic pressure value reaches 7mpa
Tilt, then slow decentralization makes the supervisor (3) of expansion branching device for multi and branched pipe (4) insert main borehole and branch well hole respectively,
Continue to suppress, until suppressing 20mpa, at this moment supervisor (3) is recovered to regular cylindrical, the bellows (6) of branched pipe (4) lower end
Distending completely is close on Mechanical suspender (1) inwall；Pitching is suppressed makes anchor in pipe (7) anchor to Mechanical suspender (1)
On the inwall of upper end, continue to suppress and realize solid tool and give up；
3rd, enter junk mill under, will be responsible for (3) bottom and grind off makes supervisor (3) insertion, under enter mechanical rotary expansion cone from expanding bifurcated dress
Put top downwards to supervisor (3) carry out expansion make its expand be affixed on orientation hollow wedge deflection tool (2) inwall on, then by under tie back stem
Enter branch well hole, this tie back stem carries out tieback to variable radial expanding cone (5) in the bellows (6) being built in branched pipe (4) lower end, when
After determining that tie back stem is connected with variable radial expanding cone (5), upper lifting pipe post, variable radial expanding cone (5) is combined with tie back stem in bellows (6)
Form swollen cone, then mechanical upper lifting pipe post is suppressed simultaneously, branched pipe (4) is carried out expand operation, until completing branched pipe (4)
Expand construction；Finally enter down junk mill again to fall bellows (6) the bottom milling of branched pipe (4) lower end, the now master of Multilateral Wells
Well and branch well hole form insertion.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410642230.8A CN104453776B (en) | 2014-11-14 | 2014-11-14 | Six-level branching well built-in window sealing well completion method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410642230.8A CN104453776B (en) | 2014-11-14 | 2014-11-14 | Six-level branching well built-in window sealing well completion method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104453776A CN104453776A (en) | 2015-03-25 |
| CN104453776B true CN104453776B (en) | 2017-01-18 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410642230.8A Active CN104453776B (en) | 2014-11-14 | 2014-11-14 | Six-level branching well built-in window sealing well completion method |
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Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113482532B (en) * | 2021-08-24 | 2023-06-20 | 中国海洋石油集团有限公司 | Branch well construction equipment and construction method |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5944108A (en) * | 1996-08-29 | 1999-08-31 | Baker Hughes Incorporated | Method for multi-lateral completion and cementing the juncture with lateral wellbores |
| US5964288A (en) * | 1995-08-04 | 1999-10-12 | Drillflex | Device and process for the lining of a pipe branch, particuarly in an oil well |
| CN101403280A (en) * | 2008-10-30 | 2009-04-08 | 中国石油集团长城钻探工程有限公司 | Six-stage branch well branching manufacturing and branching system tool |
| 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 |
| CN101598006A (en) * | 2009-07-17 | 2009-12-09 | 中国石油集团渤海石油装备制造有限公司石油机械厂 | A kind of hydraulic buckling type tail pipe hanger |
| CN101718170A (en) * | 2009-11-17 | 2010-06-02 | 中国石油集团长城钻探工程有限公司 | Preformed six-stage branch well system tool |
| CN101718169A (en) * | 2009-11-17 | 2010-06-02 | 中国石油集团长城钻探工程有限公司 | Method for realizing six-stage multilateral well completion by rear lower three-way branching mechanism |
| CN103244070A (en) * | 2013-05-07 | 2013-08-14 | 中国石油集团长城钻探工程有限公司 | Five-level multilateral well seal tool |
-
2014
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|---|---|---|---|---|
| US5964288A (en) * | 1995-08-04 | 1999-10-12 | Drillflex | Device and process for the lining of a pipe branch, particuarly in an oil well |
| US5944108A (en) * | 1996-08-29 | 1999-08-31 | Baker Hughes Incorporated | Method for multi-lateral completion and cementing the juncture with lateral wellbores |
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| CN103244070A (en) * | 2013-05-07 | 2013-08-14 | 中国石油集团长城钻探工程有限公司 | Five-level multilateral well seal tool |
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| CN104453776A (en) | 2015-03-25 |
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Effective date of registration: 20201111 Address after: No. 6, liupukang, Xicheng District, Beijing 100120 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. |