CN104373073B - A kind of Multilateral Wells pressure break window isolating tool and technique - Google Patents
A kind of Multilateral Wells pressure break window isolating tool and technique Download PDFInfo
- Publication number
- CN104373073B CN104373073B CN201410562083.3A CN201410562083A CN104373073B CN 104373073 B CN104373073 B CN 104373073B CN 201410562083 A CN201410562083 A CN 201410562083A CN 104373073 B CN104373073 B CN 104373073B
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- Prior art keywords
- pipe
- central tube
- pressure break
- return
- urceolus
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- 238000000034 method Methods 0.000 title claims abstract description 9
- 238000003780 insertion Methods 0.000 claims abstract description 29
- 239000012530 fluid Substances 0.000 claims abstract description 18
- 210000003284 Horns Anatomy 0.000 claims description 12
- 238000005553 drilling Methods 0.000 claims description 9
- 238000005406 washing Methods 0.000 claims description 9
- 210000003128 Head Anatomy 0.000 claims description 8
- 241000239290 Araneae Species 0.000 claims description 6
- 210000000282 Nails Anatomy 0.000 claims description 3
- 238000010276 construction Methods 0.000 claims description 3
- 238000005520 cutting process Methods 0.000 claims description 3
- 238000007599 discharging Methods 0.000 claims description 3
- 239000007788 liquid Substances 0.000 claims description 3
- 238000003825 pressing Methods 0.000 claims description 3
- 230000001681 protective Effects 0.000 claims description 3
- 230000000694 effects Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 241001074085 Scophthalmus aquosus Species 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
Abstract
The present invention relates to a kind of oil field Multilateral Wells technical field, particularly to a kind of Multilateral Wells pressure break window isolating tool and technique.The feeding pipe upper end of this device connects sends into pipe joint, send into pipe outer sheath equipped with inner central tube and by lock dog locking of giving up, ball seat is connected to send on inside pipe wall and block lock dog of giving up by pin of giving up, send into pipe bottom inwall and connect interstage sleeve, inner central tube outer sheath locks equipped with exterior central tube and by lock dog, deblocking urceolus is connected to outside exterior central tube, returns insertion tube and is connected to unseal on outer tube inner wall by deblocking pin.Present invention achieves effectively packing window top main hole and bottom non-pressure break branch well hole, prevent fluid in branch well hole from entering the well control risk that main hole brings.
Description
Technical field:
The present invention relates to a kind of oil field Multilateral Wells technical field, particularly to a kind of Multilateral Wells pressure break window packing
Instrument and technique.
Background technology:
Multilateral Wells technology can be effectively improved oil reservoir brill chance area thus improve oil and gas production, is a kind of effective
Well production increment mode, along with oil field at home progresses into development late stage, well yield reduces year by year, difficult dynamic
Increasingly come into one's own with reserves such as Low permeable oil and gas reservoirs etc., and for low-permeability oil deposit must carry out pressure break with
Improve near wellbore zone oil-gas Layer permeability, for Multilateral Wells pressure break, when one of them well is carried out pressure break,
Oil gas in another branch well hole easily enters main hole by window threeway, has bigger well control risk.
Summary of the invention:
The technical problem to be solved in the present invention is to provide a kind of Multilateral Wells pressure break window isolating tool and technique, should
Device is arranged on window top, passes through branch's threeway, it is achieved that effectively packing window top main hole and bottom
Non-pressure break branch well hole, prevents fluid in branch well hole from entering the well control risk that main hole brings.Overcome existing
Having Multilateral Wells pressure break, when one of them well is carried out pressure break, the oil gas in another branch well hole easily passes through
Window threeway enters main hole, has the deficiency of bigger well control risk.
The technical solution used in the present invention is: a kind of Multilateral Wells pressure break window isolating tool, including sending into pipe
Joint, send into pipe, exterior central tube, inner central tube, ball, washing pipe and time intubate；Send into the connection of pipe upper end to send
Entering pipe joint, feeding pipe outer sheath locks equipped with inner central tube and by lock dog of giving up, and ball seat is by pin of giving up
Nail is connected to send on inside pipe wall and block lock dog of giving up, and sends into pipe bottom inwall and connects interstage sleeve, inner central tube
Outer sheath locks equipped with exterior central tube and by lock dog, and deblocking urceolus is connected to outside exterior central tube, returns insertion tube
It is connected to unseal on outer tube inner wall by deblocking pin, returns insertion tube and block lock dog, return insertion tube upper end outer wall thread
Connecting horn mouth, deblocking stop collar is placed in horn mouth lower end and is connected to unseal on the inwall of urceolus upper end, packing element
Being placed in deblocking urceolus lower end and be sleeved on outside exterior central tube, upper piston is placed in packing element lower end, upper piston lower end
Being provided with the end face matched with exterior central tube outer step, be provided with fluid cylinder outside upper piston, fluid cylinder bottom is provided with
Lower piston, fluid cylinder lower end connects lock ring set, and lock ring puts and is provided with lock ring, and lock ring is sleeved on lower piston, under
The threaded cone of piston, slip sleeve is connected in cone by cone pin, and cone lower end is provided with card
Watt, slips is arranged on slip spider, and slip sleeve lower end connects lower contact, lower contact, washing pipe, jointing
Be sequentially connected with, return intubate by returning plug core pipe, V-shaped seal ring group and tapered cannula head form, connection connects
Head lower end connects back to plug core pipe, returns and is set with V-shaped seal ring group on plug core pipe, returns plug core
Pipe lower end connects tapered cannula head.
A kind of Multilateral Wells pressure break window packing technique using above-mentioned Multilateral Wells pressure break window isolating tool, should
Processing step is as follows: by drilling rod by isolating tool G.I.H, incites somebody to action back and is inserted to bottom fracturing string under intubating
Top is returned in insertion tube, and the 5-10 ton that pressurizes；When setting, hydraulic drive upper piston, complete the swollen envelope of packing element, push away
Dynamic lower piston is cut off cone pin thus is firmly anchored on sleeve pipe by slips；Continue to increase hydraulic pressure value, until
Cutting off give up pin pressure release, lock dog of giving up loses support and makes inner central tube depart from sending into pipe, thus real
Now send into pipe to give up, trip out drilling tool；
During pressure break, fracturing string insertion pipe in top is inserted into back in insertion tube by horn mouth, thus sets up pressure
Split sealing passage to carry out pressure break, pressure break mode can be pressure break in sleeve pipe and bore hole；
After fracturing liquid discharging completes, inject Oil layer protective solution to fractured well ophthalmic, top fracturing string is proposed
Well head, and under enter fishing spear, fishing spear is introduced back insertion tube by horn mouth, above carries drilling tool, offset will be solved
Nail is cut off, and returns insertion tube and loses be connected thus up with deblocking urceolus, and lock dog loses and supports so that inside and outside center
Pipe is mutually disengaged, and returns insertion tube and hangs conjunction deblocking stop collar and drive deblocking urceolus and exterior central tube up, and packing element depends on
Retract by natural resiliency；Exterior central tube is hung with upper piston and is closed, and drives fluid cylinder up, and fluid cylinder inner convex platform is hung under closing
Piston stroking upward, and band movable cone is up thus is retracted by slips, slip sleeve makes card with the urceolus of lower contact composition
Watt return to the initial position before grappling, it is achieved slips unseals；Slips drives slip spider, inner central tube, washing pipe
And return intubate up, thus realize salvage, first point of well pressing crack construction is fully completed；Enter another under starting
A set of window isolating tool carries out another branch's fracturing work.
The invention has the beneficial effects as follows: apparatus of the present invention are arranged on window top, pass through branch's threeway, it is achieved
Effective packing window top main hole and bottom non-pressure break branch well hole, prevent fluid in branch well hole from entering
The well control risk that main hole brings.
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 structural representation of the present invention.
Detailed description of the invention:
As it is shown in figure 1, a kind of Multilateral Wells pressure break window isolating tool, including send into pipe joint 1, send into pipe 2,
Exterior central tube 9, inner central tube 13, ball 21, washing pipe 28 and return intubate；Send into pipe 2 upper end and connect feeding pipe
Joint 1, feeding pipe 2 outer sheath locks equipped with inner central tube 13 and by lock dog 23 of giving up, and ball seat 24 leads to
Cross pin 25 of giving up to be connected to send on pipe 2 inwall and block lock dog 23 of giving up, send into pipe 2 bottom inwall even
Connect interstage sleeve 27, to prevent ball seat 24 from falling into bottom.Inner central tube 13 outer sheath equipped with exterior central tube 9 and leads to
Crossing lock dog 7 to lock, deblocking urceolus 5 is connected to outside exterior central tube 9, returns insertion tube 6 by deblocking pin 8
It is connected to unseal on urceolus 5 inwall, returns insertion tube 6 and block lock dog 7, return insertion tube 6 upper end outer wall thread and connect loudspeaker
Mouth 3, horn mouth 3 primarily serves and guides pressure break to return plug in instrument and fishing tool enters back the purpose of insertion tube 6.
Deblocking stop collar 4 is placed in horn mouth 3 lower end and is connected to unseal on the inwall of urceolus 5 upper end, and the two acts primarily as
To limiting back insertion tube 6 and unseal the effect of stroke, packing element 10 is placed in deblocking urceolus 5 lower end and is sleeved on outer center
Outside pipe 9, upper piston 11 is placed in packing element 10 lower end, and upper piston 11 lower end is provided with and exterior central tube 9 between outer land
The end face that rank match, is provided with fluid cylinder 12 outside upper piston 11, fluid cylinder 12 bottom is provided with lower piston 16,
Fluid cylinder 12 lower end connects lock ring set 15, and lock ring set 15 is provided with lock ring 14, and lock ring 14 is sleeved on lower piston
On 16, the threaded cone in lower piston 16 lower end 19, slip sleeve 18 is connected to cone by cone pin 17
On body 19, cone 19 lower end is provided with slips 20, and slips 20 is arranged on slip spider 22, slip sleeve 18 times
End connects lower contact 26, it is ensured that can only return to initial position when slips 20 unseals, slips 20 when preventing from unsealing
Abjection causes unsealing unsuccessfully, and lower contact 26, washing pipe 28, jointing 29 are sequentially connected with, and returns and intubates by returning
Plug core pipe 30, V-shaped seal ring group 31 and tapered cannula 32 composition, jointing 29 lower end connects
Return plug core pipe 30, return and be set with V-shaped seal ring group 31 on plug core pipe 30, return plug core pipe
30 lower ends connect tapered cannula 32.
A kind of Multilateral Wells pressure break window packing technique using above-mentioned Multilateral Wells pressure break window isolating tool, should
Processing step is as follows: by drilling rod by isolating tool G.I.H, incites somebody to action back and is inserted to bottom fracturing string under intubating
Top is returned in insertion tube, and the 5-10 ton that pressurizes；When setting, hydraulic drive upper piston 11, complete packing element 10 swollen
Envelope, promotes lower piston 16 to cut off cone pin 17 thus is firmly anchored on sleeve pipe by slips 20；Continue to increase
Adding hydraulic pressure value, until cutting off give up pin 25 pressure release, lock dog 23 of giving up loses support and makes inner central tube
13 depart from sending into pipe 2, thus realize sending into pipe 2 and give up, and trip out drilling tool；
During pressure break, fracturing string insertion pipe in top is inserted into back in insertion tube 6 by horn mouth 3, thus builds
Vertical pressure break sealing passage is to carry out pressure break, and pressure break mode can be pressure break in sleeve pipe and bore hole；
After fracturing liquid discharging completes, inject Oil layer protective solution to fractured well ophthalmic, top fracturing string is proposed
Well head, and under enter fishing spear, fishing spear is introduced back insertion tube 6 by horn mouth 3, above carries drilling tool, will unseal
Pin 8 is cut off, and returns insertion tube 6 and loses be connected thus up with deblocking urceolus 5, lock dog 7 lose support thus
Make interior exterior central tube be mutually disengaged, return insertion tube 6 hang close deblocking stop collar 4 and drive deblocking urceolus 5 and outer in
Heart pipe 9 is up, and packing element 10 relies on natural resiliency to retract；Exterior central tube 9 is hung with upper piston 11 and is closed, and drives
Fluid cylinder 12 is up, and it is up that fluid cylinder 12 inner convex platform hangs conjunction lower piston 16, and band movable cone 19 is up thus incites somebody to action
Slips 20 is retracted, and it is initial that the urceolus that slip sleeve 18 and lower contact 26 form makes that slips 20 returns to before grappling
Position, it is achieved slips unseals；Slips 20 drive slip spider 22, inner central tube 13, washing pipe 28 and return intubate
Up, thus realize salvaging, first point of well pressing crack construction is fully completed；Another set of window is entered under starting
Isolating tool carries out another branch's fracturing work.
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 (2)
1. a Multilateral Wells pressure break window isolating tool, including sending into pipe joint (1), sending into pipe (2), outer
Central canal (9), inner central tube (13), ball (21), washing pipe (28) and return intubate；It is characterized in that: send
Enter pipe (2) upper end to connect and send into pipe joint (1), send into pipe (2) outer sheath equipped with inner central tube (13) and
Being locked by lock dog of giving up (23), ball seat (24) is connected to send into pipe (2) by pin of giving up (25)
On inwall and block lock dog of giving up (23), send into pipe (2) bottom inwall and connect interstage sleeve (27), inner central tube
(13) outer sheath is equipped with exterior central tube (9) and by lock dog (7) locking, and deblocking urceolus (5) is connected to
Exterior central tube (9) outside, returns insertion tube (6) and is connected to unseal urceolus (5) inwall by deblocking pin (8)
On, return insertion tube (6) and block lock dog (7), return insertion tube (6) upper end outer wall thread and connect horn mouth (3), solve
Envelope stop collar (4) is placed in horn mouth (3) lower end and is connected to unseal on the inwall of urceolus (5) upper end, packing element
(10) being placed in deblocking urceolus (5) lower end and be sleeved on exterior central tube (9) outside, upper piston (11) is placed in
Packing element (10) lower end, upper piston (11) lower end is provided with the end face matched with exterior central tube (9) outer step,
Being provided with fluid cylinder (12) outside upper piston (11), fluid cylinder (12) bottom is provided with lower piston (16), fluid cylinder (12)
Lower end connects lock ring set (15), and lock ring set (15) is provided with lock ring (14), and lock ring (14) is sleeved on lower work
On plug (16), the threaded cone in lower piston (16) lower end (19), slip sleeve (18) passes through cone pin
Nail (17) is connected in cone (19), and cone (19) lower end is provided with slips (20), and slips (20) is pacified
Being contained on slip spider (22), slip sleeve (18) lower end connects lower contact (26), lower contact (26), washing pipe
(28), jointing (29) be sequentially connected with, return intubate by return plug core pipe (30), V-shaped seal ring group
(31) forming with tapered cannula head (32), jointing (29) lower end connects back to plug core pipe (30),
Return and be set with V-shaped seal ring group (31) on plug core pipe (30), go back to plug core pipe (30) lower end even
Connect tapered cannula head (32).
2. one kind uses the Multilateral Wells pressure break according to the Multilateral Wells pressure break window isolating tool described in claim 1
Window packing technique, it is characterised in that: this processing step is as follows: by drilling rod by isolating tool G.I.H,
To back and be inserted to fracturing string top, bottom under intubating and return in insertion tube, and the 5-10 ton that pressurizes；When setting, hydraulic thrust
Dynamic upper piston (11), completes packing element (10) swollen envelope, promotes lower piston (16) to cut off cone pin (17)
Thus slips (20) is firmly anchored on sleeve pipe；Continue to increase hydraulic pressure value, until cutting off pin of giving up (25)
And pressure release, lock dog of giving up (23) loses support and makes inner central tube (13) depart from sending into pipe (2), from
And realize sending into pipe (2) and give up, trip out drilling tool；
During pressure break, top fracturing string is inserted pipe and is inserted into back in insertion tube (6) by horn mouth (3),
Thus set up pressure break seal passage to carry out pressure break, pressure break mode can be pressure break in sleeve pipe and bore hole；
After fracturing liquid discharging completes, inject Oil layer protective solution to fractured well ophthalmic, top fracturing string is proposed
Well head, and under enter fishing spear, fishing spear is introduced back insertion tube (6) by horn mouth (3), above carries drilling tool,
Deblocking pin (8) is cut off, returns insertion tube (6) and be connected thus up with unsealing urceolus (5) and losing, lock dog
(7) lose support so that interior exterior central tube is mutually disengaged, return insertion tube (6) hang close deblocking stop collar (4)
And driving deblocking urceolus (5) and exterior central tube (9) up, packing element (10) relies on natural resiliency to retract；Outward
Central canal (9) is hung with upper piston (11) and is closed, and drives fluid cylinder (12) up, and fluid cylinder (12) inner convex platform is hung
Close lower piston (16) up, and band movable cone (19) is up thus is retracted by slips (20), slip sleeve (18)
The urceolus formed with lower contact (26) make slips (20) return to grappling before initial position, it is achieved slips unseals；
Slips (20) drive slip spider (22), inner central tube (13), washing pipe (28) and return intubate up, thus
Realizing salvaging, first point of well pressing crack construction is fully completed；Enter another set of window isolating tool under starting to carry out
Another branch's fracturing work.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410562083.3A CN104373073B (en) | 2014-10-21 | A kind of Multilateral Wells pressure break window isolating tool and technique |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410562083.3A CN104373073B (en) | 2014-10-21 | A kind of Multilateral Wells pressure break window isolating tool and technique |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104373073A CN104373073A (en) | 2015-02-25 |
| CN104373073B true CN104373073B (en) | 2017-01-04 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20200927 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. |