CN102330546B - Open hole staged fracturing well completion pipe string provided with controllable valve and hydraulic control switching pipe string - Google Patents
Open hole staged fracturing well completion pipe string provided with controllable valve and hydraulic control switching pipe string Download PDFInfo
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- CN102330546B CN102330546B CN201110291724.2A CN201110291724A CN102330546B CN 102330546 B CN102330546 B CN 102330546B CN 201110291724 A CN201110291724 A CN 201110291724A CN 102330546 B CN102330546 B CN 102330546B
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Abstract
The invention discloses an open hole staged fracturing well completion pipe string provided with a controllable valve and a hydraulic control switching pipe string, which are suitable for well completion processes of horizontal wells and straight wells. The hydraulic control switching pipe string is tripped to open and close the open hole staged fracturing well completion pipe string provided with the controllable valve, so that multilayer-section fracturing well completion construction is realized, and development requirements of low-permeability oil reservoirs and unconventional oil and gas resources are met. The pipe string is sequentially connected with a drill stem running tool, a top suspension packer, a hydraulic control switching retention cylinder, a switchable control valve, an open hole fracturing packer connected with the control valve, a shaft isolating valve and a bottom circulating valve from top to bottom by using a bushing. The hydraulic control switching pipe string comprises a hydraulic control switching tool and a continuous oil pipe; and a set of hydraulic control switching tool is connected to the bottom of the continuous oil pipe. The switchable control valve has the internal drift diameter of the same size; sand fracturing well completion can be performed on a stratum by using the bushing; and thus, requirements of large-displacement and large-scale fracturing reconstruction are met, the crack length, the crack number and the flow guide capacity are increased, and the production capacity and the recovery ratio are effectively increased.
Description
Technical field
The present invention relates to the completion system of petroleum industry, particularly settle bore hole staged fracturing completion tubular column and the pilot-controlled switch tubing string of controlled valve, be applicable to the well-completing process of horizontal well and straight well, be lowered to a pilot-controlled switch tubing string and open and close the bore hole staged fracturing completion tubular column of settling controlled valve, realize the pressure break completion construction of multi-section multi-layer, meet the exploitation needs of low-permeability oil deposit and unconventional petroleum resources.
Background technology
At present, utilizing staged fracturing of horizontal well renovation technique to improve the unconventional development of resources application scales such as low-permeability oil deposit and shale oil gas progressively strengthens.But current conventional horizontal well open hole packer segmentation well completion, as: the fracturing integrated tubing string of horizontal well completion that application number is 200920248979.9, by pitching, open step by step sliding sleeve staged fracturing technology, for allow the ball that drops into can by, arrive the pressure break well completion interval of below, the ball seat internal diameter of below must be less than the ball seat internal diameter of upper level, the impact that arranged by the classification of ball seat size, its number of fragments and pressure break scale are all very limited, and have affected correctional effect; And this sliding sleeve is pitching sliding sleeve, ball opens sliding sleeve after dropping into, and the later stage cannot close while producing again.As the later stage will selectively produce or during the transformation of refracturing repeatedly, need close sliding sleeve, this integrated pipe column integral body cannot be used.Can only again in this tubing string, be lowered to oil pipe fracturing string, carry out staged fracturing in small-scale pipe, therefore in the follow-up construction after completion, can not meet user demand., easily there is operating trouble in the structure relative complex of the fracturing integrated tubing string of this utility model completion simultaneously.In the exploitation of low-permeability oil deposit and unconventional petroleum resources, straight well for multistage pressure break, particularly tubular column structure complexity, the high horizontal well of technical requirements also do not have a kind of casing fracturing completion method can solve an above-mentioned difficult problem, are restricting the exploitation of low-permeability oil deposit and unconventional petroleum resources.
Summary of the invention
The object of this invention is to provide bore hole staged fracturing completion tubular column and the pilot-controlled switch tubing string of settling controlled valve, solve in current sleeve pipe staged fracturing completion construction, the staged fracturing technology of opening step by step sliding sleeve by pitching is affected by radial sector arrangement in ball seat, the problem that number of fragments and pressure break scale are restricted, improve the correctional effect on stratum, improve pressure break scale and efficiency.
Technical solution of the present invention can reach above-mentioned purpose:
Settling the bore hole staged fracturing completion tubular column of controlled valve, is that jointed rod running tool 3, top hanging packer 5, pilot-controlled switch are detained cylinder 2, can open use sleeve pipe 1 successively from top to bottom
closecontrol valve 4 and
withthe bore hole fracturing packer 6 of its connection, pit shaft barrier valve 8 and bottom cycle valve 7.In tubing string, at least connect one group can switching control pilot 4 and
withthe bore hole fracturing packer 6 of its connection.When pressure break completion is carried out in multistage stratum, need in tubing string, configure many groups can switching control pilot 4 and connected bore hole fracturing packer 6, one group of its bottom can switching control pilot 4 below without installing again bore hole fracturing packer 6 additional.
For opening and closing the pilot-controlled switch tubing string of the bore hole staged fracturing completion tubular column of settling controlled valve, comprise pilot-controlled switch instrument 10 and coiled tubing 9, a set of pilot-controlled switch instrument 10 is connected to coiled tubing 9 bottoms.Pilot-controlled switch instrument 10 comprises switching tools top connection 10-1, adjustable ring 10-2, drives cylinder 10-5, mechanism for opening/closing, central tube 10-8, piston 10-9 and switching tools lower contact 10-11, switching tools top connection 10-1, central tube 10-8 are connected successively with switching tools lower contact 10-11, in its outside, connect successively adjustable ring 10-2, mechanism for opening/closing, driving cylinder 10-5 and piston 10-9, between piston 10-9 and driving cylinder 10-5, baffle ring 10-6 and spring 10-7 are installed; It is corresponding with the inner chamber of piston 10-9 that the body of central tube 10-8 is provided with inlet opening.
The present invention has following significant effect and progress:
1, in pressure break completion tubular column of the present invention, the interior latus rectum that can switching control pilot adopts same size, do not use pitching method, the problem that does not exist interior latus rectum to dwindle step by step, what can guarantee that each pressure break well completion interval all uses maximum inner diameter can switching control pilot implements casing fracturing completion.Can adopt sleeve pipe sand fracturing completion to stratum, meet the needs of large discharge capacity, extensive fracturing reform, increase fracture length, crack quantity and flow conductivity, effectively improve production capacity and recovery ratio.
2, at the horizontal segment of horizontal well or a plurality of pressure break well completion intervals of straight well, can in bore hole staged fracturing completion tubular column, place as required a plurality of can switching control pilot, its can switching control pilot design specifications unified, interior latus rectum is large, can use same set of pilot-controlled switch instrument to complete keying that can switching control pilot for a plurality of pressure break completions, pressure break divides number of stages unrestricted, meets the needs of large discharge capacity, extensive fracturing reform.
3, the pressing crack construction of a plurality of fractured intervals can complete continuously, without pilot-controlled switch tubing string is proposed to ground, easy to operate, has improved pressure break efficiency, saves pressure break expense and well-completing process simple, safe and reliable, greatly reduces construction cost.
4,, without perforation, perforating job expense and activity duration have been saved.
5, in later stage production, can use pilot-controlled switch instrument, be lowered in pressure break completion tubular column, optionally open or close that any one pressure break completion uses can switching control pilot, meet the requirement of selective production and refracturing transformation, having solved prior art pressure break completion tubular column can not be repeated to open, close, can not selectively produce the difficult problem with refracturing, there is significant economic benefit and social benefit.
Accompanying drawing explanation
Fig. 1 be can switching control pilot in the present invention structural representation.
Fig. 2 is the structural representation of pilot-controlled switch instrument in the present invention.
Fig. 3 is the working state schematic representation can switching control pilot in pilot-controlled switch TO pressure break completion tubular column in the present invention time.
Fig. 4 is that in the present invention, pilot-controlled switch instrument cuts out in pressure break completion tubular column the working state schematic representation can switching control pilot time.
Fig. 5 is the structural representation of settling the bore hole staged fracturing completion tubular column of controlled valve in the present invention.
Fig. 6 is the structural representation of pilot-controlled switch tubing string in the present invention.
The specific embodiment
Below in conjunction with accompanying drawing, the present invention is described in further detail:
Settling the bore hole staged fracturing completion tubular column of controlled valve, is that jointed rod running tool 3, top hanging packer 5, pilot-controlled switch are detained cylinder 2, can open use sleeve pipe 1 successively from top to bottom
closecontrol valve 4 and
withthe bore hole fracturing packer 6 of its connection, pit shaft barrier valve 8 and bottom cycle valve 7.In tubing string, at least connect one group can switching control pilot 4 and
withthe bore hole fracturing packer 6 of its connection.When pressure break completion is carried out in multistage stratum, need in tubing string, configure many groups can switching control pilot 4 and connected bore hole fracturing packer 6, one group of its bottom can switching control pilot 4 below without installing again bore hole fracturing packer 6 additional.
Can comprise outer sleeve 4-3 and inner sliding sleeve 4-7 by switching control pilot 4, outer sleeve 4-3 is provided with fluid course 4-6, and inner sliding sleeve 4-7 is loaded in outer sleeve 4-3, and outer sleeve 4-3 two ends connect top connection 4-1 and lower contact 4-9.The inner circle of the upper sleeve of inner sliding sleeve 4-7 is provided with opens with hook shoulder 4-4, is opening with being provided with positioning bar on the cylindrical shell below hook shoulder 4-4, and inner sliding sleeve 4-7 bottom cylindrical shell inner circle is provided with closes with hook shoulder 4-8; The outside of positioning bar is provided with positioning boss 4-10.In the fluid course 4-6 of outer sleeve 4-3 overhead cylinder inner circle, be provided with and open with detent 4-2 and close and use detent 4-11, open with detent 4-2 and close and use detent 4-11 all to coordinate location with the positioning boss 4-10 of inner sliding sleeve 4-7
.when using the mechanism for opening/closing of pilot-controlled switch instrument 10 to open or close can switching control pilot 4 time, the positioning boss 4-10 of inner sliding sleeve 4-7 falls into and opens with detent 4-2 or close with detent 4-11, and the inner sliding sleeve 4-7 after opening or closing is located.In outer sleeve 4-3 inner circle, top connection 4-1 is more than or equal to the cylindrical shell length of inner sliding sleeve 4-7 to the distance of fluid course 4-6 upper port, avoids the cylindrical shell of inner sliding sleeve 4-7 to block fluid course 4-6.Junction at both sides, top connection 4-1 and the lower contact 4-9 of the fluid course 4-6 of outer sleeve 4-3 is equipped with seal, in figure, with seal 4-5, represents.
It is cylindrical body that two ends are provided with thread that pilot-controlled switch instrument is detained cylinder 2, and its internal diameter is greater than the external diameter of the pilot-controlled switch instrument 10 on pilot-controlled switch tubing string, and its annular space area of passage equals the area of passage of supporting sleeve pipe.When upper extract control switch tubing string carries out pressure break completion practice, pilot-controlled switch instrument 10 can be trapped in pilot-controlled switch instrument delay cylinder 2 and reduce chock pressure difference, avoids tool wear.
For opening and closing the pilot-controlled switch tubing string of the bore hole staged fracturing completion tubular column of settling controlled valve, comprise pilot-controlled switch instrument 10 and coiled tubing 9, a set of pilot-controlled switch instrument 10 is connected to coiled tubing 9 bottoms.Pilot-controlled switch instrument 10 comprises switching tools top connection 10-1, adjustable ring 10-2, drives cylinder 10-5, mechanism for opening/closing, central tube 10-8, piston 10-9 and switching tools lower contact 10-11, switching tools top connection 10-1, central tube 10-8 are connected successively with switching tools lower contact 10-11, in its outside, connect successively adjustable ring 10-2, mechanism for opening/closing, driving cylinder 10-5 and piston 10-9, between piston 10-9 and driving cylinder 10-5, baffle ring 10-6 and spring 10-7 are installed; It is corresponding with the inner chamber of piston 10-9 that the body of central tube 10-8 is provided with inlet opening.Mechanism for opening/closing comprises keying operating block 10-3 and drive block 10-4, opens and closes operating block 10-3 and drive block 10-4 hinge and connects; The one end that opens and closes operating block 10-3 is release slope, and its outside is provided with hook draw-in groove, this hook draw-in groove with can switching control pilot in the unlatching of inner sliding sleeve 4-7 with hook shoulder 4-4, coordinate or coordinate with closing with hook shoulder 4-8, the outside of drive block 10-4 is arc; Open and close the non-release slope end of operating block 10-3 and one end hinge of drive block 10-4 and connect, open and close the release slope end of operating block 10-3 and the other end of drive block 10-4 and connect with the top of switching tools top connection 10-1 and the upper end hinge of driving cylinder 10-5 respectively; This mechanism for opening/closing is at least provided with three covers, is axially disposed within switching tools top connection 10-1 and drives between cylinder 10-5.The place of being tightly connected at switching tools lower contact 10-11 and piston 10-9 is provided with sealing ring, in Fig. 2, with sealing ring 10-10, represents.The working state schematic representation that opens or closes the pilot-controlled switch instrument 10 can switching control pilot 4 time is represented by Fig. 3 and Fig. 4.In Fig. 3 and Fig. 4, B represents to be equipped with pressure break completion tubular column that can switching control pilot 4; A represents pilot-controlled switch tubing string.
Use coiled tubing to connect a set of pilot-controlled switch instrument in its bottom, be in a set of pilot-controlled switch tubing string, connect 10, one of two pilot-controlled switch instruments can switching control pilot 4 for opening, another can switching control pilot 4 for closing.Two pilot-controlled switch instruments 10 closure on tubing string is contrary or relatively, makes the installation direction of keying operating block 10-3 of two pilot-controlled switch instruments 10 contrary or relatively.
take the concrete construction method that construction is example in horizontal well
First according to stratum need to configure can switching control pilot 4 quantity and by the bore hole staged fracturing completion tubular column G.I.H connecting, concrete technology is as follows:
1, this process pipe string is used and can behind switching sliding sleeve 4 installation sites, be carried out connecting of completion tubular column in definite staged fracturing sum of series pressure break completion, the completion tubular column G.I.H direct circulation connecting is replaced, pit shaft barrier valve 8 is closed in pitching, having suppressed a plurality of bore hole fracturing packers 6 sets, continue to have suppressed top hanging packer 5 and set and give up, after full well pressure testing is qualified, trip out drilling rod running tool 3.
2, the wellhead assembly of salable coiled tubing 9 is installed, referring to connecting pilot-controlled switch tubing string tubing string in Fig. 6.
when needs staged fracturing completion, the casing fracturing work progress of each well section is as follows:
A: for pilot-controlled switch tubing string is beaten hydraulic pressure, hydraulic pressure enters in the central tube 10-8 of pilot-controlled switch instrument 10 from coiled tubing 9, inlet opening from body enters in piston 10-9, promote piston 10-9 Compress Spring 10-7, piston 10-9 promotes to drive cylinder 10-5 simultaneously, thereby drive drive block 10-4, make to open and close operating block 10-3 and stretch out, block the hook shoulder 4-4 for unlatching on can the inner sliding sleeve 4-7 of switching control pilot 4.That by pilot-controlled switch instrument 10, opens interval of interest in bore hole staged fracturing completion tubular column can switching control pilot 4;
B: be the release of pilot-controlled switch tubing string, the keying operating block 10-3 that makes pilot-controlled switch instrument 10 departs from hook shoulder 4-4 with unlatching that can switching control pilot 4;
C: upper extract control switch tubing string, make two pilot-controlled switch instruments 10 all enter pilot-controlled switch instrument and be detained in cylinder 2, from well head pressure break completion tubular column, carry out pressure break, complete the casing fracturing construction of this section;
D: transfer pilot-controlled switch tubing string, for pilot-controlled switch tubing string is beaten hydraulic pressure, hydraulic pressure enters in central tube 10-8 from coiled tubing 9, inlet opening from body enters in piston 10-9, promote piston 10-9 Compress Spring 10-7, simultaneously piston 10-9 promotes to drive a cylinder 10-5, thereby drives drive block 10-4 to make to open and close to block when operating block 10-3 stretches out closing with hook shoulder 4-8 on can the inner sliding sleeve 4-7 of switching control pilot 4.Liquid for plugging circulation road 4-6, that by pilot-controlled switch instrument 10, closes interval of interest in bore hole staged fracturing completion tubular column can switching control pilot 4;
E: be the release of pilot-controlled switch tubing string, make the keying operating block 10-3 of pilot-controlled switch instrument 10 and can closing with hook shoulder 4-8 of switching control pilot 4 depart from;
F: above carry or transfer pilot-controlled switch tubing string to new interval of interest and repeat above-mentioned operation continuation construction; Or pilot-controlled switch tubing string is carried to ground, normally carried out follow-up construction.
Claims (9)
1. settle the bore hole staged fracturing completion tubular column of controlled valve, it is characterized in that, use sleeve pipe (1) from top to bottom successively jointed rod running tool (3), top hanging packer (5), pilot-controlled switch be detained cylinder (2), can switching control pilot (4) and with the bore hole fracturing packer (6), pit shaft barrier valve (8) and the bottom cycle valve (7) that can switching control pilot (4) be connected; Can comprise outer sleeve (4-3) and inner sliding sleeve (4-7) by switching control pilot (4), outer sleeve (4-3) is provided with fluid course (4-6), inner sliding sleeve (4-7) is loaded in outer sleeve (4-3), and outer sleeve (4-3) two ends connect top connection (4-1) and lower contact (4-9).
2. the bore hole staged fracturing completion tubular column of arrangement controlled valve according to claim 1, it is characterized in that, the inner circle of described inner sliding sleeve (4-7) upper sleeve is provided with opens with hook shoulder (4-4), on the cylindrical shell of opening with hook shoulder (4-4) below, be provided with positioning bar, inner sliding sleeve (4-7) bottom cylindrical shell inner circle is provided with closes with hook shoulder (4-8), and the outside of positioning bar is provided with positioning boss (4-10); Cylindrical shell inner circle above the fluid course (4-6) of outer sleeve (4-3) is provided with opens with detent (4-2) and closes with detent (4-11), opens with detent (4-2) and close with detent (4-11) all to coordinate with the positioning boss (4-10) of inner sliding sleeve (4-7).
3. the bore hole staged fracturing completion tubular column of arrangement controlled valve according to claim 2, it is characterized in that, in described outer sleeve (4-3) inner circle, top connection (4-1) is more than or equal to the cylindrical shell length of inner sliding sleeve (4-7) to the distance of fluid course (4-6) upper port; Junction in both sides, top connection (4-1) and the lower contact (4-9) of the fluid course (4-6) of outer sleeve (4-3) is equipped with seal.
4. the bore hole staged fracturing completion tubular column of arrangement controlled valve according to claim 1, it is characterized in that, it is the cylindrical body that two ends are provided with thread that described pilot-controlled switch instrument is detained cylinder (2), and the internal diameter of cylindrical body is greater than the external diameter of the pilot-controlled switch instrument (10) on pilot-controlled switch tubing string
,pilot-controlled switch instrument is detained the area of passage that cylinder (2) annular space area of passage equals supporting sleeve pipe.
5. for opening and closing the pilot-controlled switch tubing string of the bore hole staged fracturing completion tubular column of arrangement controlled valve claimed in claim 1, it is characterized in that, comprise pilot-controlled switch instrument (10) and coiled tubing (9), a set of pilot-controlled switch instrument is connected to coiled tubing (9) bottom, pilot-controlled switch instrument (10) comprises switching tools top connection (10-1), adjustable ring (10-2), drive cylinder (10-5), mechanism for opening/closing, central tube (10-8), piston (10-9) and switching tools lower contact (10-11), switching tools top connection (10-1), central tube (10-8) is connected successively with switching tools lower contact (10-11), switching tools top connection (10-1) and central tube (10-8) screwed connection, in its outside, connect successively adjustable ring (10-2), mechanism for opening/closing, drive cylinder (10-5) and piston (10-9), between piston (10-9) and driving cylinder (10-5), baffle ring (10-6) and spring (10-7) are installed, mechanism for opening/closing comprises keying operating block (10-3) and drive block (10-4), opens and closes operating block (10-3) and connects with drive block (10-4) hinge.
6. pilot-controlled switch tubing string according to claim 5, is characterized in that, it is corresponding with the inner chamber of piston (10-9) that the body of described central tube (10-8) is provided with inlet opening.
7. pilot-controlled switch tubing string according to claim 5, it is characterized in that, one end of described keying operating block (10-3) is release slope, its outside is provided with hook draw-in groove, this hook draw-in groove with can switching control pilot (4) in the hook shoulder for unlatching (4-4) of inner sliding sleeve (4-7) coordinate or coordinate with closing with hook shoulder (4-8), the outside of drive block (10-4) is arc; Open and close the non-release slope end of operating block (10-3) and one end hinge of drive block (10-4) and connect, open and close the release slope end of operating block (10-3) and the other end of drive block (10-4) and connect with the top of switching tools top connection (10-1) and the upper end hinge of driving cylinder (10-5) respectively; This mechanism for opening/closing is at least provided with three covers, is axially disposed within switching tools top connection (10-1) and drives between cylinder (10-5).
8. according to the pilot-controlled switch tubing string described in claim 5 or 7, it is characterized in that, described keying operating block (10-3) on one side hook draw-in groove be right-angle side, another side is hypotenuse.
9. pilot-controlled switch tubing string according to claim 5, it is characterized in that, the described bottom that a set of pilot-controlled switch instrument is connected to coiled tubing (9), refer to and in a pilot-controlled switch tubing string, connect two pilot-controlled switch instruments (10), the closure of two pilot-controlled switch instruments (10) on tubing string is contrary or relative.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110291724.2A CN102330546B (en) | 2011-09-30 | 2011-09-30 | Open hole staged fracturing well completion pipe string provided with controllable valve and hydraulic control switching pipe string |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110291724.2A CN102330546B (en) | 2011-09-30 | 2011-09-30 | Open hole staged fracturing well completion pipe string provided with controllable valve and hydraulic control switching pipe string |
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| CN102330546A CN102330546A (en) | 2012-01-25 |
| CN102330546B true CN102330546B (en) | 2014-05-07 |
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| CN102330546B (en) * | 2011-09-30 | 2014-05-07 | 中国石油化工股份有限公司 | Open hole staged fracturing well completion pipe string provided with controllable valve and hydraulic control switching pipe string |
| US9995111B2 (en) * | 2012-12-21 | 2018-06-12 | Resource Well Completion Technologies Inc. | Multi-stage well isolation |
| CN103711456A (en) * | 2013-12-16 | 2014-04-09 | 东营市福利德石油科技开发有限责任公司 | Hydraulic switching tool for deep-water oil well |
| EP2982828A1 (en) * | 2014-08-08 | 2016-02-10 | Welltec A/S | Downhole valve system |
| CN105041283B (en) * | 2014-11-10 | 2017-09-15 | 中国石油化工股份有限公司 | Formula of helping pull a cart full-bore fracturing tool and control method |
| CN106437618B (en) * | 2016-09-06 | 2019-01-18 | 中国石油天然气股份有限公司 | Segmented well completion pipe column, segmented reconstruction pipe column and oil well reconstruction device |
| US10590748B2 (en) * | 2017-09-22 | 2020-03-17 | Statoil Gulf Services LLC | Reservoir stimulation method and apparatus |
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| CN110965978B (en) * | 2020-01-03 | 2024-07-30 | 中国石油天然气股份有限公司 | Horizontal well repeated fracturing tool and horizontal well repeated fracturing process method |
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| CN114427419B (en) * | 2020-09-25 | 2023-12-01 | 中国石油化工股份有限公司 | Stage fracturing completion string for unlimited full-drift-diameter oil and gas well |
| CN114482958B (en) * | 2020-10-26 | 2024-06-18 | 中国石油化工股份有限公司 | Casing well cementation full-drift diameter infinite stage fracturing completion device and fracturing completion method thereof |
| CN114482957B (en) * | 2020-10-26 | 2024-05-24 | 中国石油化工股份有限公司 | Open hole full-drift diameter infinite stage staged fracturing completion device and fracturing completion method thereof |
| CN112324384B (en) * | 2020-11-30 | 2022-06-10 | 中国石油集团渤海钻探工程有限公司 | Non-well killing operation process method applying pressure control switch valve |
| CN115992695B (en) * | 2021-10-18 | 2024-09-24 | 中国石油化工股份有限公司 | Novel underground intelligent measurement and control device, system and method |
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