CN103437747A - Horizontal well infinite-stage sectional transformation method - Google Patents
Horizontal well infinite-stage sectional transformation method Download PDFInfo
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- CN103437747A CN103437747A CN2013103968842A CN201310396884A CN103437747A CN 103437747 A CN103437747 A CN 103437747A CN 2013103968842 A CN2013103968842 A CN 2013103968842A CN 201310396884 A CN201310396884 A CN 201310396884A CN 103437747 A CN103437747 A CN 103437747A
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- 238000011426 transformation method Methods 0.000 title abstract 2
- 230000011218 segmentation Effects 0.000 claims abstract description 24
- 230000009466 transformation Effects 0.000 claims abstract description 18
- 238000007789 sealing Methods 0.000 claims description 25
- 238000000034 method Methods 0.000 claims description 16
- 238000007634 remodeling Methods 0.000 claims description 14
- 230000001186 cumulative effect Effects 0.000 claims description 13
- 230000015572 biosynthetic process Effects 0.000 claims description 8
- 230000033001 locomotion Effects 0.000 claims description 6
- 230000008602 contraction Effects 0.000 claims description 4
- 230000001737 promoting effect Effects 0.000 claims description 4
- 230000000694 effects Effects 0.000 claims description 3
- 230000005284 excitation Effects 0.000 claims description 3
- 238000004891 communication Methods 0.000 abstract description 3
- 238000005488 sandblasting Methods 0.000 abstract description 2
- 238000005516 engineering process Methods 0.000 description 11
- 238000010276 construction Methods 0.000 description 4
- 238000011161 development Methods 0.000 description 3
- 230000018109 developmental process Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000005553 drilling Methods 0.000 description 2
- 238000013459 approach Methods 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 230000003628 erosive effect Effects 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000010338 mechanical breakdown Methods 0.000 description 1
- 239000003209 petroleum derivative Substances 0.000 description 1
- 238000009418 renovation Methods 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
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Abstract
The invention discloses an infinite stage segmentation transformation method for a horizontal well, which comprises the following steps: a. a signal receiver on the sliding sleeve sends a search signal within a set range; b. putting a signal transmitter into the well, wherein when the signal transmitter enters the set range, the signal transmitter receives the search signal and sends a control signal to a signal receiver; c. after the signal receiver receives the control signal, the signal receiver excites the power mechanism to push the piston to move upwards, the sand blasting hole is opened, the internal and external communication channel of the oil pipe is opened, and the ball seat generating barrel of the sliding sleeve generates a ball seat under the action of the piston to implement the first section of transformation; d. after the first-stage reconstruction is finished, a ball is thrown to block the first-stage reservoir, and an internal and external communication channel of the oil pipe is closed; e. and repeating the steps and sequentially carrying out subsequent section reconstruction. The invention has no grade difference, the stage number of the subsection is not limited by the inner diameter of the shaft, and the infinite large-scale staged fracturing reformation can be realized.
Description
Technical field
The present invention relates to a kind of horizontal well infinite stages segmentation remodeling method, belong to the completion renovation technique field of using in oil exploitation.
Background technology
Along with going deep into of exploration and development, shale gas, tight gas reservoir enter the scale development stage, the extensive pressure break mode such as staged fracturing of horizontal well and volume fracturing becomes the agent technology of oil-gas field development gradually, existing staged fracturing technology mainly contains: open hole packer+sliding sleeve staged fracturing technology, drilling bridging plug staged fracturing technology, the single pressure of two envelope staged fracturing technology, jetting staged fracturing technology, but it has certain limitation.Open hole packer+sliding sleeve technology realizes open sliding sleeve because the different differential balls of needs and ball seat coordinate, and can't realize full-bore, and segmentation progression is limited; Though drilling bridging plug can carry out the extensive pressure break of infinite stages, duty cycle is long, and cost is high, can't realize large scale application; The single pressure of two envelopes staged fracturing technology need be dragged to tubing string needs Operating Pressure to coordinate, long construction period; Jetting is because the limited chock pressure difference in addition of the wear-resisting erosion resistance of spray orifice is large, and therefore constructing, hop count is limited, duty cycle is long, scope of construction item is limited.
In prior art, Chinese patent literature disclosed " a kind of ball-casting opened self-locking sliding sleeve ", publication number: CN201972661U, publication date: on 09 14th, 2011, this patent has been set forth pitching when the net horizontal section operation and has been opened pressure break sandblast passage, and locking maintenance production passage is unimpeded, but still adopt the pitching segmentation, segments is limited.
Patent " two-way opening pressure differential sliding sleeve ", publication number: CN201723198U, publication date: 20110126, this utility model is to utilize pressure reduction to promote upper and lower fluid cylinder to move up and down respectively, open passage, can solve the pitching sliding sleeve can not be for the problem of horizontal bare hole well staged fracturing, acidifying tool tubular column first paragraph, but still can't solve the limited problem of segmentation.
Patent " Intelligent sliding sleeve in a kind of selective switch slide bushing assembly ", publication number: CN202125290U, publication date: on 01 25th, 2012, this utility model was to utilize to be lowered to special opening-closing tool, opens and closes intelligent sliding sleeve.The method complicated operation, long construction period.
Other prior art, as patent " staged modified string of open-hole horizontal well ", " staged fracturing string of oil-gas horizontal well ", " barefoot completion hydraulic sand blasting fixed tubular column fracturing strings " etc. are all to adopt pitching to carry out the multistage subsection transformation, there is differential problem, all can't realize infinite stages segmentation transformation demand.
Summary of the invention
The object of the invention is to overcome the problems referred to above that existing staged fracturing technology exists, a kind of horizontal well infinite stages segmentation remodeling method is provided, adopt the present invention without differential, segmentation progression is not limited by the pit shaft internal diameter, can realize the extensive staged fracturing transformation of infinite stages.
For achieving the above object, the technical solution used in the present invention is as follows:
A kind of horizontal well infinite stages segmentation remodeling method, is characterized in that, comprises the steps:
A, by the signal receiver on sliding sleeve, send search signal in setting range;
B, in well, drop into signal projector, when signal projector enters this setting range, signal projector receives search signal, and transmits control signal to signal receiver;
After c, signal receiver receive this control signal, excitation power mechanism, promote piston and move upward, and opens the sandblast hole, open the inside and outside communicating passage of oil pipe, and, under the effect of piston, the ball seat of sliding sleeve generates cylinder and generates ball seat, implements the first paragraph transformation;
After d, first paragraph have been transformed, pitching makes it be seated the ball seat place, and shutoff first paragraph reservoir is closed the inside and outside communicating passage of oil pipe;
E, repetition above-mentioned steps, carry out the subsequent segment transformation successively.
Described sliding sleeve comprises that top connection, ball seat generate cylinder, piston, urceolus and inner core, piston and inner core are arranged in urceolus, the outer wall of described urceolus upper end and top connection is sealedly and fixedly connected, lower end and inner core are sealedly and fixedly connected, described ball seat generates a cylinder upper end and is fixedly connected with the inner wall sealing of top connection, and piston is for generating with ball seat that a cylinder lower end coordinates the generation ball seat and for controlling the unlatching in sandblast hole; Between inner core and urceolus, be provided with for promoting the actuating unit of piston movement.
Be provided with inner core sandblast hole on described inner core, on urceolus, corresponding inner core sandblast hole is provided with urceolus sandblast hole; Before described actuating unit excites, piston closes inner core sandblast hole and urceolus sandblast hole, after actuating unit excites, inner core sandblast hole and urceolus sandblast hole are communicated with formation sandblast hole.
Top between described inner core and urceolus arranges piston, and piston coordinates with inner core and urceolus movable sealing respectively, and bottom arranges actuating unit; After described actuating unit excites, the promotion piston moves upward and coordinates and form ball seat with ball seat generation cylinder.
Described actuating unit comprises the signal receiver set gradually from bottom to up, the igniter of being controlled by signal receiver and the cumulative bullet coordinated with igniter.
The top of described piston is provided with the inner core upper end and coordinates the limited step to piston limit, is provided with two sealing rings on the inner and outer wall of bottom; Before actuating unit excites, between two sealing rings of inner core sandblast hole on inwall, between two sealing rings of urceolus sandblast hole on outer wall.
After described actuating unit excites, piston promotes to be ball seat cylindraceous and generates barrel dliameter to shrinking the formation ball seat.
Described ball seat generates cylinder bottom outer wall and is set to tapered portion, and the inner surface correspondence on piston top is set to tapered portion; When piston moves upward, the tapered portion of piston coordinates promotion ball seat generation barrel dliameter to form ball seat to shrinking with the tapered portion that ball seat generates cylinder.
In described c step, after signal receiver receives this control signal, control the shot point firearm and light the cumulative bullet, the gas push piston that the cumulative bullet produces moves upward, and inner core sandblast hole and urceolus sandblast hole are communicated with, and opens the inside and outside communicating passage of oil pipe.
Employing the invention has the advantages that:
One, the present invention is by the both-way communication between signal projector and signal receiver, and the shot point firearm, light the cumulative bullet and promote piston, reach the intelligent selection open function, simultaneously piston generates cylinder to the epicone seat of kicking off, and forms ball seat, can finally realize the infinite stages transformation.
Two, the technical bottleneck that the present invention has overcome that traditional staged fracturing of horizontal well cost is high, segments is limited etc., reach the intelligent selection switch, simple to operate, quick; In addition, shutoff ball seat internal diameter is identical, and without differential, segmentation progression is not limited by the pit shaft internal diameter, can realize the transformation of infinite stages staged fracturing.
Three, in the present invention, described sliding sleeve comprises that top connection, ball seat generate cylinder, piston, urceolus and inner core, piston and inner core are arranged in urceolus, the outer wall of described urceolus upper end and top connection is sealedly and fixedly connected, lower end and inner core are sealedly and fixedly connected, described ball seat generates a cylinder upper end and is fixedly connected with the inner wall sealing of top connection, and piston is for generating with ball seat that a cylinder lower end coordinates the generation ball seat and for controlling the unlatching in sandblast hole; Be provided with between inner core and urceolus for promoting the actuating unit of piston movement, adopt this structure, because sliding sleeve internal diameter is identical, without differential, thereby realized horizontal well infinite stages segmentation transformation, and after adopting this sliding sleeve, only have piston movement during switch, the mechanical breakdown reduced, improved reliability.
Four, in the present invention, be provided with inner core sandblast hole on described inner core, on urceolus, corresponding inner core sandblast hole is provided with urceolus sandblast hole; Before described actuating unit excites, piston closes inner core sandblast hole and urceolus sandblast hole, after actuating unit excites, inner core sandblast hole and urceolus sandblast hole are communicated with formation sandblast hole, adopt this structure, guaranteed that actuating unit excites the sealing between front each parts, and, after exciting, the sandblast hole can form fast.
Five, in the present invention, the top between described inner core and urceolus arranges piston, and piston coordinates with inner core and urceolus movable sealing respectively, and bottom arranges actuating unit; After described actuating unit excites, the promotion piston moves upward and coordinates and form ball seat with ball seat generation cylinder, adopts this structure, has guaranteed the sealing between piston and inner core and urceolus, and realized the generation of ball seat by the motion of piston, guaranteed carrying out smoothly of postorder transformation.
Six,, in the present invention, the top of described piston is provided with the inner core upper end and coordinates the limited step to piston limit, is provided with two sealing rings on the inner and outer wall of bottom; Before actuating unit excites, between two sealing rings of inner core sandblast hole on inwall, between two sealing rings of urceolus sandblast hole on outer wall; Adopt this structure, guaranteed that actuating unit excites the stability of secondary piston, and urceolus sandblast hole and inner core sandblast hole can reliably be sealed.
Seven,, in the present invention, after described actuating unit excites, piston promotes to be ball seat cylindraceous and generates barrel dliameter to shrinking the formation ball seat, adopts this structure, does not need to arrange in advance ball seat, has guaranteed without differential realization.
Eight, in the present invention, described ball seat generates cylinder bottom outer wall and is set to tapered portion, and the inner surface correspondence on piston top is set to tapered portion; When piston moves upward, the tapered portion of piston coordinates promotion ball seat generation barrel dliameter to form ball seat to shrinking with the tapered portion that ball seat generates cylinder, adopt this mode to coordinate the generation ball seat, guarantee can generate ball seat in communicating passage inside and outside opening oil pipe, all not identical with prior art, improved the reliability that generates ball seat, the ball-off reservoir is more reliable.
Nine, for current horizontal well, large-scale staged fracturing construction has very strong specific aim and compliance in the present invention, this technology can be adapted to the limitless extensive fracturing reforms of horizontal well such as shale gas, tight gas, applying of petroleum gas field, have broad application prospects.
The accompanying drawing explanation
Fig. 1 is the shift sleeve structure schematic diagram in the present invention
Fig. 2 is segmentation reconstruction structure schematic diagram of the present invention
In figure, be labeled as: 1, top connection; 2, ball seat generates cylinder; 3, sealing ring; 4, guide shoe; 5, piston; 6, urceolus; 7, sliding sleeve; 8, packer; 9, cumulative bullet; 10, igniter; 11, signal receiver; 12, inner core; 13, oil pipe; 14, sleeve pipe.
The specific embodiment
Embodiment 1
A kind of horizontal well infinite stages segmentation remodeling method, comprise the steps:
A, by the signal receiver on sliding sleeve, send search signal in setting range;
B, in well, drop into signal projector, when signal projector enters this setting range, signal projector receives search signal, and transmits control signal to signal receiver;
After c, signal receiver receive this control signal, excitation power mechanism, promote piston and move upward, and opens the sandblast hole, open the inside and outside communicating passage of oil pipe, and, under the effect of piston, the ball seat of sliding sleeve generates cylinder and generates ball seat, implements the first paragraph transformation;
After d, first paragraph have been transformed, pitching makes it be seated ball seat and generates the ball seat place that cylinder generates, and shutoff first paragraph reservoir is closed the inside and outside communicating passage of oil pipe;
E, repetition above-mentioned steps, carry out the subsequent segment transformation successively.
The preferred embodiment of the present invention is, as shown in Figure 1, described sliding sleeve 7 comprises that top connection 1, ball seat generate cylinder 2, piston 5, urceolus 6 and inner core 12, piston 5 and inner core 12 are arranged in urceolus 6, the outer wall of described urceolus 6 upper ends and top connection 1 is sealedly and fixedly connected, lower end and inner core 12 are sealedly and fixedly connected, and described ball seat generates cylinder 2 upper ends and is fixedly connected with the inner wall sealing of top connection 1, and piston 5 is for generating with ball seat that cylinder 2 lower ends coordinate the generation ball seat and for controlling the unlatching in sandblast hole; Between inner core 12 and urceolus 6, be provided with for promoting the actuating unit of piston 5 motions.
Further, be provided with inner core sandblast hole on described inner core 12, on urceolus 6, corresponding inner core sandblast hole is provided with urceolus sandblast hole; Before described actuating unit excites, piston 5 sealing inner core sandblast hole and urceolus sandblast holes, after actuating unit excites, inner core sandblast hole and urceolus sandblast hole are communicated with formation sandblast hole.
Further, the top between described inner core 12 and urceolus 6 arranges piston 5, and piston 5 coordinates with inner core 12 and urceolus 6 movable sealings respectively, and bottom arranges actuating unit; After described actuating unit excites, promotion piston 5 moves upward and coordinates and form ball seat with ball seat generation cylinder 2.
In the present invention, described actuating unit comprises the signal receiver 11 set gradually from bottom to up, the igniter 10 of being controlled by signal receiver 11 and the cumulative bullet 9 coordinated with igniter 10.
In the present invention, the top of described piston 5 is provided with inner core 12 upper ends and coordinates the limited step spacing to piston 5, is provided with two sealing rings 3 on the inner and outer wall of bottom; Before actuating unit excites, between two sealing rings 3 of inner core sandblast hole on inwall, between two sealing rings 3 of urceolus sandblast hole on outer wall.
In the present invention, after described actuating unit excites, piston 5 promotes to be ball seat cylindraceous and generates cylinder 2 radial contraction formation ball seats.
In the present invention, described ball seat generates cylinder 2 bottom outer walls and is set to tapered portion, and the inner surface correspondence on piston 5 tops is set to tapered portion; When piston 5 moves upward, the tapered portion of piston 5 coordinates promotion ball seat generation cylinder 2 radial contraction to form ball seat with the tapered portion that ball seat generates cylinder 2.
In described c step, after signal receiver 11 receives this control signal, control shot point firearm 10 and light cumulative bullet 9, the gas push piston 5 that cumulative bullet 9 produces moves upward, and inner core sandblast hole and urceolus sandblast hole are communicated with, and opens the inside and outside communicating passage of oil pipe.
Embodiment 2
As shown in Figure 2, after setting packer 8 and guide shoe 4, will be connected on oil pipe or sleeve pipe with oil pipe 13 or the close sliding sleeve of sleeve pipe 14 external diameters, be lowered to precalculated position.By in well, dropping into low-frequency signal emitter, sent the signal of a coding by signal receiver 11, the signal projector that search enters in effective range approaches, can be to the signal checking of decoding of coding when approaching signal projector receives this signal, after identifying successfully, signal projector can send a high-frequency coding message to the signal receiver 11 be positioned on sleeve, receive this section high frequency message and decoded by signal receiver 11, if the information after identification is coincide, can shot point firearm 10, light cumulative bullet 9, the high energy gas that cumulative bullet 9 produces promotes piston 5, expose the sandblast hole, open the inside and outside communicating passage of oil pipe, simultaneously piston 5 generates cylinder 2 to the epicone seat of kicking off, form ball seat, the transformation of enforcement first paragraph, rear ball-off first paragraph reservoir, transformation second segment reservoir, carry out successively the subsequent segment transformation, because not being subject to the pit shaft internal diameter, do not limit segmentation progression, finally realize the infinite stages transformation.
In the present invention, described signal projector is comprised of microcontroller, high frequency circuit for generating, low frequency receiving circuit.Described signal receiver 11 is by microcontroller, high frequency receiving circuit, low frequencies circuit and bus transfer the electric circuit constitute.Signal projector is identical with signal projector and the signal receiver in other field with signal receiver 11, at this, is not described in detail.
Claims (9)
1. a horizontal well infinite stages segmentation remodeling method, is characterized in that, comprises the steps:
A, by the signal receiver on sliding sleeve, send search signal in setting range;
B, in well, drop into signal projector, when signal projector enters this setting range, signal projector receives search signal, and transmits control signal to signal receiver;
After c, signal receiver receive this control signal, excitation power mechanism, promote piston and move upward, and opens the sandblast hole, open the inside and outside communicating passage of oil pipe, and, under the effect of piston, the ball seat of sliding sleeve generates cylinder and generates ball seat, implements the first paragraph transformation;
After d, first paragraph have been transformed, pitching makes it be seated the ball seat place, and shutoff first paragraph reservoir is closed the inside and outside communicating passage of oil pipe;
E, repetition above-mentioned steps, carry out the subsequent segment transformation successively.
2. a kind of horizontal well infinite stages segmentation remodeling method according to claim 1, it is characterized in that: described sliding sleeve comprises top connection (1), ball seat generates cylinder (2), piston (5), urceolus (6) and inner core (12), piston (5) and inner core (12) are arranged in urceolus (6), the outer wall of described urceolus (6) upper end and top connection (1) is sealedly and fixedly connected, lower end and inner core (12) are sealedly and fixedly connected, described ball seat generates cylinder (2) upper end and is fixedly connected with the inner wall sealing of top connection (1), piston (5) is for generating with ball seat that cylinder (a 2) lower end coordinates the generation ball seat and for controlling the unlatching in sandblast hole, between inner core (12) and urceolus (6), be provided with for promoting the actuating unit of piston (5) motion.
3. a kind of horizontal well infinite stages segmentation remodeling method according to claim 2 is characterized in that: be provided with inner core sandblast hole on described inner core (12), the upper corresponding inner core sandblast of urceolus (6) hole is provided with urceolus sandblast hole; Before described actuating unit excites, piston (5) sealing inner core sandblast hole and urceolus sandblast hole, after actuating unit excites, inner core sandblast hole and urceolus sandblast hole are communicated with formation sandblast hole.
4. according to the described a kind of horizontal well infinite stages segmentation remodeling method of claim 2 or 3, it is characterized in that: the top between described inner core (12) and urceolus (6) arranges piston (5), piston (5) coordinates with inner core (12) and urceolus (6) movable sealing respectively, and bottom arranges actuating unit; After described actuating unit excites, promotion piston (5) moves upward and coordinates and form ball seat with ball seat generation cylinder (2).
5. a kind of horizontal well infinite stages segmentation remodeling method according to claim 4 is characterized in that: described actuating unit comprises the signal receiver (11) set gradually from bottom to up, the igniter (10) of being controlled by signal receiver (11) and the cumulative bullet (9) coordinated with igniter (10).
6. a kind of horizontal well infinite stages segmentation remodeling method according to claim 3, it is characterized in that: the top of described piston (5) is provided with inner core (12) upper end and coordinates the limited step spacing to piston (5), is provided with two sealing rings (3) on the inner and outer wall of bottom; Before actuating unit excites, inner core sandblast hole is positioned between two sealing rings (3) on inwall, and urceolus sandblast hole is positioned between two sealing rings (3) on outer wall.
7. according to claim 2,3,5 or 6 described a kind of horizontal well infinite stages segmentation remodeling methods, it is characterized in that: after described actuating unit excites, piston (5) promotes to be ball seat cylindraceous and generates cylinder (2) radial contraction formation ball seat.
8. a kind of horizontal well infinite stages segmentation remodeling method according to claim 7 is characterized in that: described ball seat generates cylinder (2) bottom outer wall and is set to tapered portion, and the inner surface correspondence on piston (5) top is set to tapered portion; When piston (5), while moving upward, the tapered portion of piston (5) coordinates promotion ball seat generation cylinder (2) radial contraction to form ball seat with the tapered portion that ball seat generates cylinder (2).
9. according to claim 2,3,5,6 or 8 described a kind of horizontal well infinite stages segmentation remodeling methods, it is characterized in that: in described c step, after signal receiver (11) receives this control signal, control shot point firearm (10) and light cumulative bullet (9), the gas push piston (5) that cumulative bullet (9) produces moves upward, inner core sandblast hole and urceolus sandblast hole are communicated with, and open the inside and outside communicating passage of oil pipe.
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| CN103711469A (en) * | 2013-12-27 | 2014-04-09 | 阜新驰宇石油机械有限公司 | Horizontal well switchable type well cementation staged fracturing oil production technology |
| CN107035352A (en) * | 2017-06-08 | 2017-08-11 | 中国石油大学(北京) | A kind of water-jet infinite stages fracturing device and fracturing process |
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| CN107035352A (en) * | 2017-06-08 | 2017-08-11 | 中国石油大学(北京) | A kind of water-jet infinite stages fracturing device and fracturing process |
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