CN104405318A - Well selective reentrancy device and well selective reentrancy method - Google Patents
Well selective reentrancy device and well selective reentrancy method Download PDFInfo
- Publication number
- CN104405318A CN104405318A CN201410685629.4A CN201410685629A CN104405318A CN 104405318 A CN104405318 A CN 104405318A CN 201410685629 A CN201410685629 A CN 201410685629A CN 104405318 A CN104405318 A CN 104405318A
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- China
- Prior art keywords
- reentry
- well
- borehole
- guiding tool
- instrument
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Classifications
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP 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 the boreholes or wells
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP 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
Abstract
The invention provides a well selective reentrancy device and a well selective reentrancy method. The well selective reentrancy device comprises an underground permanent positioning tool (51), a main well reentrancy guide tool (52) and a branch well reentrancy guide tool (53), wherein the cylindrical underground permanent positioning tool (51) can be permanently and fixedly nested into an underground main sleeve (5); an annular guide inclined surface (101) is formed at the upper end of the inner sleeve (100 of the main well reentrancy guide tool (52); a side surface opening (19) is formed in the sidewall of the branch well reentrancy guide tool (53); the outer diameter of the lower end of the branch well reentrancy guide tool (53) is greater than the inner diameter of the annular guide inclined surface (101). Due to the cooperation of an operating pipe string and the main well reentrancy tool or the branch well reentrancy tool, the well selective reentrancy device and the well selective reentrancy method are capable of selectively guiding the operating pipe string to accurately enter the main well or the branch wells a plurality of times.
Description
Technical field
The present invention relates to oil exploration equipment technical field, particularly tool pipe string can be sent to the borehole selective deflector equipment in the branch well hole or main borehole of specifying, or a kind of borehole selective re-access method that tool pipe string can be sent in the branch well hole or main borehole of specifying.
Background technology
Multilateral well the different depth in a main hole gets out several pit shaft for exploiting the well of different depth oil reservoir.This technology can increase rushes down pasta and amasss, and improves oil well output, comprehensively reduces oil reservoir development cost.How fast the effect of the well reentry technology after Multilateral Wells completion is mainly reflected in the pipe string of later stage operation, and selective entering is led in a well accurately.
Lateral wellbore reentry technology can be divided into: termination bent sub or under looking for the examination of instrument before 1, utilizing pipe string; 2, enter to reentry under guiding tool, forms distinguishing master and prop up well passage in well, and reentry guiding tool utilizes selective the entering of a main well channel size size on orientation tool to lead a well.The key of this technology is the accurate positioning of reentry orientation tool and hangs reliable, otherwise can cause and can not find borehole position and cause heavily entering failure, brings a lot of problem to follow-up oil recovery, well workover and oil formation improvement.Under the guiding tool that enters to reentry can accurately find main split's well, but depend on the accurate location of orientation tool.
Summary of the invention
In order to solve the problem of the poor accuracy existed in existing lateral wellbore reentry technology.The invention provides a kind of borehole selective deflector equipment and method, described borehole selective deflector equipment comprises down-hole permanent positioning instrument, main borehole reentry guiding tool and a well reentry guiding tool, by making working pipe string coordinate with main borehole reentry instrument or a well reentry instrument, this borehole selective deflector equipment and method can repeatedly optionally guide working pipe string to enter main borehole or branch well hole accurately.
The present invention is the technical scheme solving the employing of its technical problem: a kind of borehole selective deflector equipment, comprises down-hole permanent positioning instrument, main borehole reentry guiding tool and a well reentry guiding tool;
The down-hole permanent positioning instrument of tubular can be located in the main sleeve pipe of down-hole by permanent fixed cover, main borehole reentry guiding tool is arranged at the top of down-hole permanent positioning instrument, main borehole reentry guiding tool comprises outer sleeve and inner sleeve, the lower end of inner sleeve is plugged in the upper end of down-hole permanent positioning instrument, the upper end of inner sleeve is plugged in outer sleeve, the upper end of inner sleeve is annular lead-in chamfered, the sidewall of outer sleeve is provided with lateral openings, annular lead-in chamfered is positioned at lateral openings, and annular lead-in chamfered is towards lateral openings; A well reentry guiding tool for tubular can bend, the sidewall propping up well reentry guiding tool is provided with lateral opening, the lower end of propping up well reentry guiding tool is stretched out from lateral openings, the top of propping up well reentry guiding tool is sheathed in the upper end of outer sleeve, lateral opening is corresponding with the position of annular lead-in chamfered, and the external diameter of a well reentry guiding tool lower end is greater than the internal diameter of annular lead-in chamfered.
Down-hole permanent positioning instrument contains necking segment, is provided with seal outside necking segment.
The upper end edge of down-hole permanent positioning instrument is circumferentially with the first annular locating latch face, the outer, bottom of inner sleeve is circumferentially with the second circular orientation inclined-plane that the annular locating latch face with first matches, the lower end of inner sleeve is plugged in the upper end of down-hole permanent positioning instrument, and inner sleeve and down-hole permanent positioning instrument are connected and fixed by resilient key.
The upper end edge of outer sleeve is circumferentially with the 3rd circular orientation inclined-plane, and the outer, top of a well reentry guiding tool is circumferentially with and the 4th of the 3rd circular orientation slopes which match the annular locating latch face.
Well reentry guiding tool contains cylindrical body, and lateral opening is arranged on the sidewall of cylindrical body, and the position of lateral opening lower end is lower than the position of annular lead-in chamfered lower end.
A kind of borehole selective re-access method, comprises the following steps:
Step 1, under the desired location of main borehole, enter above-mentioned down-hole permanent positioning instrument, and make down-hole permanent positioning instrument be positioned at set angle;
Step 2, in described main borehole under enter above-mentioned main borehole reentry guiding tool, make the lower end of main borehole reentry guiding tool correspondence be plugged in the upper end of down-hole permanent positioning instrument;
Step 3, in described main borehole under enter above-mentioned well reentry guiding tool, the lower end of well reentry guiding tool to be stretched out and corresponding with the position of a well from lateral openings by the guiding of annular lead-in chamfered, completes the installation of above-mentioned borehole selective deflector equipment;
Step 4, when needs pipe string enters described main borehole operation, the lower end of working pipe string is fixedly connected with main borehole reentry instrument, again the main borehole instrument of reentrying is inserted described borehole selective deflector equipment, when needs pipe string enters described wellbore operations, the lower end of working pipe string is fixedly connected with a well reentry instrument, then well reentry instrument will be propped up inserts described borehole selective deflector equipment.
Main borehole reentry instrument comprises the reentry body of overcoat and column, the upper end of reentry body is plugged in overcoat, reentry body and overcoat are connected and fixed by shear pin, the top peripheral hardware of overcoat has the step surface for engaging with the upper end of a well reentry guiding tool, the upper end of reentry body is provided with the connecting portion for being connected and fixed with working pipe string, and the external diameter of the lower end of reentry body is less than the internal diameter of annular lead-in chamfered.
In step 4, when needing described pipe string to enter the below operation of described main borehole, instrument of first being reentried by main borehole inserts in a well reentry guiding tool of described borehole selective deflector equipment from the top down, make reentry body be separated with overcoat again by building the pressure, reentry body is passed down through down-hole permanent positioning instrument.
Prop up the reentry body that well reentry instrument comprises overcoat and column, reentry body is plugged in overcoat, reentry body and overcoat are connected and fixed by shear pin, the lower end peripheral hardware of overcoat has the taper seat for engaging with the lower end of a well reentry guiding tool, the upper end of reentry body is provided with the connecting portion for being connected and fixed with working pipe string, the external diameter of the lower end of reentry body is greater than the internal diameter of annular lead-in chamfered, and the external diameter of the lower end of overcoat is less than the internal diameter of a well reentry guiding tool.
In step 4, when the described pipe string of needs enters described wellbore operations, first a well reentry instrument is inserted in a well reentry guiding tool of described borehole selective deflector equipment from the top down, the lower end of propping up well reentry instrument is entered by the guiding of annular lead-in chamfered in the lower end of a well reentry guiding tool, make reentry body be separated with overcoat again by building the pressure, reentry body passes the lower end of a well reentry guiding tool obliquely.
The invention has the beneficial effects as follows: described borehole selective deflector equipment comprises down-hole permanent positioning instrument, main borehole reentry guiding tool and a well reentry guiding tool, by making working pipe string coordinate with main borehole reentry instrument or a well reentry instrument, this borehole selective deflector equipment and method can repeatedly optionally guide working pipe string to enter main borehole or branch well hole accurately.
Accompanying drawing explanation
Below in conjunction with accompanying drawing, borehole selective deflector equipment of the present invention and method are described in further detail.
Fig. 1 is the front view of borehole selective deflector equipment.
Fig. 2 is the assembling schematic diagram of borehole selective deflector equipment.
Fig. 3 is the schematic diagram of down-hole permanent positioning device in well.
Fig. 4 is the schematic diagram of main borehole reentry guiding tool.
Fig. 5 is the schematic diagram of a well reentry guiding tool.
Fig. 6 is the schematic diagram of main borehole reentry instrument.
Fig. 7 is the schematic diagram of a well reentry instrument.
Fig. 8 is the schematic diagram after main borehole reentry guiding tool is given up.
Fig. 9 prop up well reentry guiding tool give up after schematic diagram.
Figure 10 is the schematic diagram after main borehole reentry instrument puts in place.
Figure 11 is the schematic diagram that main borehole reentry instrument enters main borehole.
Figure 12 is the schematic diagram that main borehole reentry instrument reclaims.
Figure 13 is the schematic diagram after a well reentry instrument puts in place.
Figure 14 is the schematic diagram that a well reentry instrument enters main borehole.
Figure 15 is the schematic diagram that a well reentry instrument reclaims.
Wherein 1. lock holes, 2. the first annular locating latch face, 3. seal, 4. necking segment; 5. main sleeve pipe, 6. transfers and gives up, 7. the 3rd circular orientation inclined-plane, 8. locating slot, 9. outer sleeve, 10. inner sleeve, 101. annular lead-in chamfered, 11. lateral openings, 12. second circular orientation inclined-planes, 13. resilient keys, 14. plugs, 15. transfer and give up, 16. the 4th annular locating latch faces, 17. positioning keys, 18. cylindrical body, 19. lateral openings, 20. mount, 21. overcoats, 22. shear pins, 23. reentry bodies, 24. reentry seekers, 25. reentry bodies, 26. shear pins, 27. overcoats, 28. reentry seekers, 29. taper seats;
30. send into rod string, 31. foot piece strings, 32. working pipe strings, 33. step surfaces;
51. down-hole permanent positioning instruments, 52. main borehole reentry guiding tools, 53. well reentry guiding tools, 54. main borehole reentry instruments, 55. well reentry instruments.
Detailed description of the invention
Below in conjunction with accompanying drawing, borehole selective deflector equipment of the present invention is described in further detail.A kind of borehole selective deflector equipment, as depicted in figs. 1 and 2, comprises down-hole permanent positioning instrument 51, main borehole reentry guiding tool 52 and a well reentry guiding tool 53, the down-hole permanent positioning instrument 51 of tubular can be located in the main sleeve pipe 5 of down-hole by permanent fixed cover, main borehole reentry guiding tool 52 is arranged at the top of down-hole permanent positioning instrument 51, main borehole reentry guiding tool 52 comprises outer sleeve 9 and inner sleeve 10, the lower end of inner sleeve 10 is plugged in the upper end of down-hole permanent positioning instrument 51, the upper end of inner sleeve 10 is plugged in outer sleeve 9, the upper end of inner sleeve 10 is annular lead-in chamfered 101, the sidewall of outer sleeve 9 is provided with lateral openings 11, annular lead-in chamfered 101 is positioned at lateral openings 11, annular lead-in chamfered 101 is towards lateral openings 11, a well reentry guiding tool 53 for tubular can bend, propping up well reentry guiding tool 53 is that metal material is as steel, the bending of well reentry guiding tool 53 for tubular is less than 3 degree, the sidewall propping up well reentry guiding tool 53 is provided with lateral opening 19, the lower end of propping up well reentry guiding tool 53 is stretched out from lateral openings 11, the top of propping up well reentry guiding tool 53 is sheathed in the upper end of outer sleeve 9, lateral opening 19 is corresponding with the position of annular lead-in chamfered 101, and the external diameter of well reentry guiding tool 53 lower end is greater than the internal diameter of annular lead-in chamfered 101.
Shown in Fig. 1 and Fig. 2 be down-hole permanent positioning instrument 51, schematic diagram when main borehole reentry guiding tool 52 and well reentry guiding tool 53 are assembled together, when main borehole reentry guiding tool 52 and a well reentry guiding tool 53 are not installed as shown in Figure 4 and Figure 5, namely Fig. 4 and Fig. 5 is part drawing, main borehole reentry guiding tool 52 is provided with gives up 6 for transferring of installing, and a well reentry guiding tool 53 is provided with gives up 15 for transferring of installing.
As shown in Figure 3, down-hole permanent positioning instrument 51, containing necking segment 4, is provided with seal 3 outside necking segment 4.The positioning pedestal of a down-hole permanent positioning instrument 51 as this branch well hole is set in the main sleeve pipe 5 in down-hole.Can set main borehole bottom and branch well hole packing after down-hole permanent positioning instrument 51 is designed with seal 3.Down-hole permanent positioning instrument 51 is designed with the lock hole 1 be connected with main borehole reentry guiding tool 51.
The upper end edge of down-hole permanent positioning instrument 51 is circumferentially with the first annular locating latch face 2, the outer, bottom of inner sleeve 10 is circumferentially with the second circular orientation inclined-plane 12 that the annular locating latch face 2 with first matches, the lower end of inner sleeve 10 is plugged in the upper end of down-hole permanent positioning instrument 51, first annular locating latch face 2 and the correspondence laminating of the second circular orientation inclined-plane 12, inner sleeve 10 and down-hole permanent positioning instrument 51 are connected and fixed by resilient key 13, as depicted in figs. 1 and 2.The position that first annular locating latch face 2 and the second circular orientation inclined-plane 12 can control lateral openings 11 and annular lead-in chamfered 101 is accurately set, improves the precision guiding working pipe string to enter main borehole or branch well hole accurately.
The upper end edge of outer sleeve 9 is circumferentially with the 3rd circular orientation inclined-plane 7, the outer, top of propping up well reentry guiding tool 53 is circumferentially with the 4th annular locating latch face 16 matched with the 3rd circular orientation inclined-plane 7, 3rd circular orientation inclined-plane 7 and the 4th annular locating latch face 116 correspondence laminating, prop up well reentry guiding tool 53 and be provided with positioning key 17, the lower end on the 3rd circular orientation inclined-plane 7 is provided with locating slot 8, locating slot 8 coordinates with positioning key 17 that to realize a well reentry guiding tool 53 fixing with outer sleeve 9 circumference, namely after positioning key 17 inserts locating slot 8, prop up well reentry guiding tool 53 to rotate relative to outer sleeve 9.
Well reentry guiding tool 53 is containing cylindrical body 18, and lateral opening 19 is arranged on the sidewall of cylindrical body 18, and the position of lateral opening 19 lower end is lower than the position of annular lead-in chamfered 101 lower end.The lower end of cylindrical body 18 is also provided with the mount 20 of tubular, and the two ends of mount 20 are pin thread, and one end of mount 20 is connected with cylindrical body 18, and the other end of mount 20 is threaded with tail pipe 30.
When this borehole selective deflector equipment is installed, as depicted in figs. 1 and 2, because tail pipe 30 and the external diameter of well reentry guiding tool 53 lower end are greater than the internal diameter of annular lead-in chamfered 101, tail pipe 30 can not enter downwards in the internal diameter of annular lead-in chamfered 101 and can only be guided by side direction and then pass from lateral openings 11 after touching annular lead-in chamfered 101.
A kind of borehole selective re-access method, comprises the following steps:
Step 1, complete after branch well hole bore hole creeps into, permanent positioning instrument 51 under the desired location lower going-into-well of the main sleeve pipe 5 of main borehole, and make down-hole permanent positioning instrument 51 be positioned at set angle.
Described desired location is after described borehole selective deflector equipment completes installation, and the position of lateral openings 11 is corresponding with the position of a well; Described set angle is after described borehole selective deflector equipment completes installation, and lateral openings 11 is towards a well.
Step 2, in the main sleeve pipe 5 of described main borehole under enter main borehole reentry guiding tool 52, make the lower end of main borehole reentry guiding tool 52 correspondence be plugged in the upper end of down-hole permanent positioning instrument 51;
Concrete, the transferring of the top of main borehole reentry guiding tool 52 is given up and 6 to be threaded with feeding rod string 30, be lowered into recoil, down-hole on permanent positioning instrument 4, the plug 14 of main borehole reentry guiding tool 52 lower end inserts in permanent positioning device 4, slipped into by the first annular locating latch face 2 of permanent positioning device 4 and put in place, first annular locating latch face 2 and the second circular orientation inclined-plane 12 fit tightly, the resilient key 13 of main borehole reentry guiding tool 52 and lock hole 1 mechanical caging of down-hole permanent positioning instrument 51, as shown in Figure 8.After putting in place, back-off is given up, and trips out rod string 30, and the seat completing main borehole reentry guiding tool is put.
Step 3, in the main sleeve pipe 5 of described main borehole under enter a well reentry guiding tool 53, the lower end of well reentry guiding tool 53 to be stretched out and corresponding with the position of a well from lateral openings 11 by the guiding of annular lead-in chamfered 101, completes the installation of above-mentioned borehole selective deflector equipment.
Concrete, prop up well reentry guiding tool 53 bottom to be threaded with the tail pipe string 31 of a well, well reentry guiding tool 53 top transfer give up 15 with send into rod string 31 and be threaded, prop up lateral openings 11 place of tail pipe string 31 through main borehole reentry guiding tool 52 of well, being guided by the annular lead-in chamfered 10 of main borehole reentry guiding tool 52 slides in a well, the top of propping up well reentry guiding tool 53 is inserted in main borehole reentry guiding tool 52, as shown in Figure 2 and Figure 9, after being contacted with the 3rd circular orientation inclined-plane 7 by the 4th annular locating latch face 16, slide along the helicoid on the 3rd circular orientation inclined-plane 7 in 4th annular locating latch face 16, and finally overlap with the 3rd circular orientation inclined-plane 7, and hang on the 3rd circular orientation inclined-plane 7, locking, now prop up lateral opening 19 place on well reentry guiding tool 53 just to the annular lead-in chamfered 10 of main borehole reentry guiding tool 52.After putting in place, back-off is given up, and trips out rod string 30, and the seat completing a well reentry guiding tool is put.Thus complete the installation of above-mentioned borehole selective deflector equipment.
Step 4, when needing pipe string to enter the below operation of described main borehole, the lower end of working pipe string 32 is fixedly connected with main borehole reentry instrument 54, instrument 54 of being reentried by main borehole inserts described borehole selective deflector equipment, when needs pipe string enters described wellbore operations, the lower end of working pipe string 32 is fixedly connected with a well reentry instrument 55, prop up well reentry instrument 55 and insert described borehole selective deflector equipment, as shown in Fig. 8 to 15.
As shown in Figure 6, main borehole reentry instrument 54 comprises the reentry body 23 of overcoat 21 and column, the upper end of reentry body 23 is plugged in overcoat 21, reentry body 23 and overcoat 21 are connected and fixed by shear pin 22, the top peripheral hardware of overcoat 21 has the step surface 33 for engaging with the upper end of a well reentry guiding tool 53, the upper end of reentry body 23 is provided with the connecting portion for being connected and fixed with working pipe string 32, and the external diameter of the lower end of reentry body 23 is less than the internal diameter of annular lead-in chamfered 101.Concrete, the lower end of reentry body 23 is provided with reentry target seeker 24, and the external diameter of reentry target seeker 24 is less than the internal diameter of annular lead-in chamfered 101.
Concrete, in step 4, when needs pipe string enters operation under main borehole, the end of working pipe string 32 is connected the top of the reentry body 23 of main borehole reentry instrument 54.After main borehole reentry instrument 54 is lowered into position, the reentry body 23 of main borehole reentry instrument 54 is inserted in a well reentry guiding tool 53, the step surface 33 of main borehole reentry instrument 54 abuts with the upper surface of branch well hole reentry guiding tool 53, the upper end of overcoat 21 is blocked in the upper end of namely propping up well reentry guiding tool 53, overcoat 21 centralizing functions of main borehole reentry instrument 54, reentry target seeker 24 is guided correctly to enter in the annular lead-in chamfered 10 of main borehole reentry guiding tool 52 bottom, as shown in Figure 10.Then, build the pressure, cut off the shear pin 22 between the overcoat 21 of main borehole reentry instrument 54 and reentry body 23, overcoat 21 is motionless, working pipe string 32 and reentry body 23 descending and enter in main borehole and start operation, as shown in figure 11.Then, with reference to Figure 12, above carry working pipe string 32, during upper end by a well reentry guiding tool 53, take the overcoat 21 of the main borehole reentry instrument 54 carried over out of well head together by step surface 33, fulfil assignment.
As shown in Figure 7, prop up the reentry body 25 that well reentry instrument 55 comprises overcoat 27 and column, reentry body 25 is plugged in overcoat 27, reentry body 25 and overcoat 27 are connected and fixed by shear pin 26, the lower end peripheral hardware of overcoat 27 has the taper seat 29 for engaging with the lower end of a well reentry guiding tool 53, the upper end of reentry body 25 is provided with the connecting portion for being connected and fixed with working pipe string 32, the external diameter of the lower end of reentry body 25 is greater than the internal diameter of annular lead-in chamfered 101, the external diameter of the lower end of overcoat 27 is less than cylindrical body 18 internal diameter of a well reentry guiding tool 53.Concrete, the lower end of reentry body 25 is provided with reentry seeker 28, is greater than the internal diameter of annular lead-in chamfered 101 outside the external diameter of reentry seeker 28, and the external diameter of the lower end of overcoat 27 is less than the internal diameter of cylindrical body 18, as shown in figure 13.
Concrete, in step 4, when needs pipe string enters wellbore operations, the end of working pipe string 32 is connected a well reentry instrument 55.After being lowered into position, prop up well reentry instrument 55 through a well reentry guiding tool 53, when touching annular lead-in chamfered 101, external diameter due to well reentry instrument 55 lower end is greater than the internal diameter of annular lead-in chamfered 101 and is less than the internal diameter of cylindrical body 18, the bottom of propping up well reentry instrument 55 is entered in the lower end of a well reentry guiding tool 53 by annular lead-in chamfered 101 guiding, as shown in figure 13.Then, with reference to Figure 14, build the pressure, cut off the shear pin 26 between the overcoat 27 of a well reentry instrument 55 and reentry body 25, the outer conical surface 29 of overcoat 27 lower end abuts with the upper end of mount 20, mount 20 place that a well reentry guiding tool 53 stayed by overcoat 27 is motionless, working pipe string 32 and reentry body 25 descending, enter in a well and start operation.Then, with reference to Figure 15, upper lifting pipe string, reentry body 25, by mount 20 place, is taken the overcoat 27 of a well reentry instrument 55 out of well head together, is fulfiled assignment.
Wherein, main borehole reentry instrument 54 can be able to be reused after changing shear pin, and a well reentry instrument 55 can be reused after changing shear pin.
The above, be only specific embodiments of the invention, can not limit the scope that invention implements with it, so the displacement of its equivalent assemblies, or the equivalent variations done according to scope of patent protection of the present invention and modification, all still should belong to the category that this patent is contained.In addition, the technical characteristic in the present invention and all can using by independent assortment between technical characteristic, between technical characteristic and technical scheme, between technical scheme and technical scheme.
Claims (10)
1. a borehole selective deflector equipment, it is characterized in that, described borehole selective deflector equipment comprises down-hole permanent positioning instrument (51), main borehole reentry guiding tool (52) and a well reentry guiding tool (53);
Down-hole permanent positioning instrument (51) of tubular can be located in the main sleeve pipe (5) of down-hole by permanent fixed cover, main borehole reentry guiding tool (52) is arranged at the top of down-hole permanent positioning instrument (51), main borehole reentry guiding tool (52) comprises outer sleeve (9) and inner sleeve (10), the lower end of inner sleeve (10) is plugged in the upper end of down-hole permanent positioning instrument (51), the upper end of inner sleeve (10) is plugged in outer sleeve (9), the upper end of inner sleeve (10) is annular lead-in chamfered (101), the sidewall of outer sleeve (9) is provided with lateral openings (11), annular lead-in chamfered (101) is positioned at lateral openings (11), annular lead-in chamfered (101) is towards lateral openings (11),
A well reentry guiding tool (53) for tubular can bend, the sidewall propping up well reentry guiding tool (53) is provided with lateral opening (19), the lower end of propping up well reentry guiding tool (53) is stretched out from lateral openings (11), the top of propping up well reentry guiding tool (53) is sheathed in the upper end of outer sleeve (9), lateral opening (19) is corresponding with the position of annular lead-in chamfered (101), and the external diameter of well reentry guiding tool (53) lower end is greater than the internal diameter of annular lead-in chamfered (101).
2. borehole selective deflector equipment according to claim 1, is characterized in that: down-hole permanent positioning instrument (51), containing necking segment (4), is provided with seal (3) outside necking segment (4).
3. borehole selective deflector equipment according to claim 1, it is characterized in that: the upper end edge of down-hole permanent positioning instrument (51) is circumferentially with the first annular locating latch face (2), the outer, bottom of inner sleeve (10) is circumferentially with the second circular orientation inclined-plane (12) that the annular locating latch face (2) with first matches, the lower end of inner sleeve (10) is plugged in the upper end of down-hole permanent positioning instrument (51), and inner sleeve (10) and down-hole permanent positioning instrument (51) are connected and fixed by resilient key (13).
4. borehole selective deflector equipment according to claim 1, it is characterized in that: the upper end edge of outer sleeve (9) is circumferentially with the 3rd circular orientation inclined-plane (7), the outer, top of a well reentry guiding tool (53) is circumferentially with the 4th annular locating latch face (16) matched with the 3rd circular orientation inclined-plane (7).
5. borehole selective deflector equipment according to claim 1, it is characterized in that: a well reentry guiding tool (53) is containing cylindrical body (18), lateral opening (19) is arranged on the sidewall of cylindrical body (18), and the position of lateral opening (19) lower end is lower than the position of annular lead-in chamfered (101) lower end.
6. a borehole selective re-access method, is characterized in that: described borehole selective re-access method comprises the following steps:
Step 1, under the desired location of main borehole, enter down-hole permanent positioning instrument (51) in Claims 1 to 5 described in any one claim, and make down-hole permanent positioning instrument (51) be positioned at set angle;
Step 2, in described main borehole under enter main borehole reentry guiding tool (52) in Claims 1 to 5 described in any one claim, make the lower end correspondence of main borehole reentry guiding tool (52) be plugged in the upper end of down-hole permanent positioning instrument (51);
Step 3, in described main borehole under enter well reentry guiding tool (53) in Claims 1 to 5 described in any one claim, the lower end of well reentry guiding tool (53) to be stretched out and corresponding with the position of propping up well from lateral openings (11) by the guiding of annular lead-in chamfered (101), completes the installation of the borehole selective deflector equipment in Claims 1 to 5 described in any one claim;
Step 4, when needs pipe string enters described main borehole operation, the lower end of working pipe string (32) is fixedly connected with main borehole reentry instrument (54), instrument (54) of being reentried by main borehole again inserts described borehole selective deflector equipment, when needs pipe string enters described wellbore operations, the lower end of working pipe string (32) is fixedly connected with a well reentry instrument (55), then well reentry instrument (55) will be propped up inserts described borehole selective deflector equipment.
7. borehole selective re-access method according to claim 6, it is characterized in that: main borehole reentry instrument (54) comprises the reentry body (23) of overcoat (21) and column, the upper end of reentry body (23) is plugged in overcoat (21), reentry body (23) and overcoat (21) are connected and fixed by shear pin (22), the top peripheral hardware of overcoat (21) has the step surface (33) for engaging with the upper end of a well reentry guiding tool (53), the upper end of reentry body (23) is provided with the connecting portion for being connected and fixed with working pipe string (32), the external diameter of the lower end of reentry body (23) is less than the internal diameter of annular lead-in chamfered (101).
8. borehole selective deflector equipment according to claim 7, it is characterized in that: in step 4, when needing described pipe string to enter the below operation of described main borehole, instrument (54) of first being reentried by main borehole inserts in a well reentry guiding tool (53) of described borehole selective deflector equipment from the top down, make reentry body (23) be separated with overcoat (21) again by building the pressure, reentry body (23) is passed down through down-hole permanent positioning instrument (51).
9. borehole selective deflector equipment according to claim 6, it is characterized in that: a well reentry instrument (55) comprises the reentry body (25) of overcoat (27) and column, reentry body (25) is plugged in overcoat (27), reentry body (25) and overcoat (27) are connected and fixed by shear pin (26), the lower end peripheral hardware of overcoat (27) has the taper seat (29) for engaging with the lower end of a well reentry guiding tool (53), the upper end of reentry body (25) is provided with the connecting portion for being connected and fixed with working pipe string (32), the external diameter of the lower end of reentry body (25) is greater than the internal diameter of annular lead-in chamfered (101), the external diameter of the lower end of overcoat (27) is less than the internal diameter of a well reentry guiding tool (53).
10. borehole selective deflector equipment according to claim 9, it is characterized in that: in step 4, when the described pipe string of needs enters described wellbore operations, first will prop up well reentry instrument (55) inserts in a well reentry guiding tool (53) of described borehole selective deflector equipment from the top down, the lower end of propping up well reentry instrument (55) is entered by the guiding of annular lead-in chamfered (101) in the lower end of a well reentry guiding tool (53), make reentry body (25) be separated with overcoat (27) again by building the pressure, reentry body (25) passes the lower end of a well reentry guiding tool (53) obliquely.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410685629.4A CN104405318B (en) | 2014-11-25 | 2014-11-25 | A kind of borehole selective deflector equipment and method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201410685629.4A CN104405318B (en) | 2014-11-25 | 2014-11-25 | A kind of borehole selective deflector equipment and method |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112627777A (en) * | 2020-12-18 | 2021-04-09 | 中海石油(中国)有限公司 | Double-pipe well completion pipe string system of selectively reentrable branch well, construction method and oil extraction method |
| CN112627730A (en) * | 2020-12-18 | 2021-04-09 | 成都理工大学 | Method and device for reentry into radial branch well |
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| US20040011529A1 (en) * | 2000-05-22 | 2004-01-22 | Mcgarian Bruce | Sealed lateral wellbore junction |
| CN1948702A (en) * | 2005-10-10 | 2007-04-18 | 中国石油天然气集团公司 | Well drilling method of multibranch well |
| CN1793599A (en) * | 2005-12-30 | 2006-06-28 | 中国海洋石油总公司 | Apparatus for connecting branching well window and connecting method thereof |
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| CN112627777A (en) * | 2020-12-18 | 2021-04-09 | 中海石油(中国)有限公司 | Double-pipe well completion pipe string system of selectively reentrable branch well, construction method and oil extraction method |
| CN112627730A (en) * | 2020-12-18 | 2021-04-09 | 成都理工大学 | Method and device for reentry into radial branch well |
| CN112627730B (en) * | 2020-12-18 | 2022-10-28 | 成都理工大学 | Method and device for reentry into radial branch well |
| CN112627777B (en) * | 2020-12-18 | 2023-02-03 | 中海石油(中国)有限公司 | Double-pipe well completion pipe string system of selectively reentrable branch well, construction method and oil extraction method |
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| Publication number | Publication date |
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| CN104405318B (en) | 2017-12-05 |
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