CN106869893A - Perforation/pressure break/packing integrated apparatus and its multistage fracturing process pipe string - Google Patents
Perforation/pressure break/packing integrated apparatus and its multistage fracturing process pipe string Download PDFInfo
- Publication number
- CN106869893A CN106869893A CN201710155635.2A CN201710155635A CN106869893A CN 106869893 A CN106869893 A CN 106869893A CN 201710155635 A CN201710155635 A CN 201710155635A CN 106869893 A CN106869893 A CN 106869893A
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- CN
- China
- Prior art keywords
- pawl spring
- ball seat
- spring ball
- perforation
- pressure break
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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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
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/25—Methods for stimulating production
- E21B43/26—Methods for stimulating production by forming crevices or fractures
- E21B43/261—Separate steps of (1) cementing, plugging or consolidating and (2) fracturing or attacking the formation
-
- 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
- E21B33/00—Sealing or packing boreholes or wells
- E21B33/10—Sealing or packing boreholes or wells in the borehole
- E21B33/12—Packers; Plugs
- E21B33/126—Packers; Plugs with fluid-pressure-operated elastic cup or skirt
-
- 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
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/11—Perforators; Permeators
- E21B43/114—Perforators using direct fluid action on the wall to be perforated, e.g. abrasive jets
Abstract
The invention discloses a kind of perforation/pressure break/packing integrated apparatus, the device does not influence to be segmented series by the way that successively the ball of input same size completes the unlatching step by step of corresponding hydraulic ejector, packer and sand blast sliding sleeve twice；Each hydraulic ejector only carries out the perforating job of correspondence interval, and perforation efficiency is high；Pressing crack construction is carried out by sand blast sliding sleeve, operational discharge capacity is not influenceed；Packer is setting successively, and the pressure-bearing time is short, and sealing effectiveness is relatively reliable, and can real-time monitoring casing pressure (strata pressure) change, can effectively pre- sand-blockage；During construction upper strata, lower floor's packer is unsealed automatically, and tubing string easily rises；The multistage fracturing process pipe string being assembled into using multiple perforation/pressure break/packing integrated apparatus can one-trip string realize that perforation, pressure break, packing are integrated, it is simple to operate, safe and reliable, hydrocarbon contamination during perforation is avoided, construction period is shortened, operating cost is reduced.
Description
Technical field
The present invention relates to low permeability reservoir renovation technique field, more particularly to a kind of perforation/pressure break/packing integrated apparatus
And its multistage fracturing process pipe string.
Background technology
China's oil-gas reservoir is complicated, various, Low Permeability Oil/gas aboundresources, CNPC's production of hydrocarbons and engineering services
Oil field is based oneself upon by enterprise, has carried out fruitful fracturing technique tackling key problem, forms the fracturing technique for differing from one another.In recent years, directly
Well, horizontal well multilevel hierarchy fracturing technique play an important role in low permeability reservoir, thin layer, the fracturing reform of multilayer,
Have become Low Permeability Oil/gas development of resources, improve the agent technology of individual well oil and gas production.
At present, separate stratum fracfturing construction is main is sealed using " packer+sliding sleeve " separate stratum fracfturing, fixed tubular column water-jet waterpower
Every separate stratum fracfturing and oil pipe dragging water-jet separate stratum fracfturing mode.Wherein, before the construction of " packer+sliding sleeve " layered fracturing pipe string
Need to carry out perforation, easily oil-gas Layer is polluted；Fixed tubular column water-jet layered fracturing pipe string interlayer waterpower insulates effect
Cannot be guaranteed；Dragging tubing string water-jet layered fracturing pipe string construction period is more long, and operation is discontinuous, nozzle long-time work
Perforation efficiency is low after work, and packer is repeatedly setting, deblocking, and packer easily fails.
The content of the invention
It is an object of the invention to provide it is a kind of without perforation in advance and can one-trip string realize perforation, pressure break, packing
Perforation/pressure break/packing integrated apparatus.
It is a further object of the present invention to provide a kind of multistage constituted using above-mentioned perforation/pressure break/packing integrated apparatus
Fracturing technology tubing string.
Therefore, technical solution of the present invention is as follows：
A kind of perforation/pressure break/packing integrated apparatus, including outer barrel and be threaded on the inwall of the outer barrel bottom
Central tube；
It is provided with upper pawl spring ball seat, inner cylinder and the lower pawl spring ball seat being sequentially connected from top to bottom on the inside of the outer barrel, and
Three is fixed on the outer barrel by multiple second shear pins being circumferentially disposed on the inner cylinder and the outer barrel
On；Multiple pressure break passages are along the circumferential direction offered on the outer drum outer wall being provided with the inner cylinder, the pressure break passage leads to
Cross the inner cylinder closing being arranged on the inside of the outer barrel；
An annular groove is machined with the inner tank theca, along multiple first shear pins that the outer barrel circumferencial direction is set
Nail passes the outer tube side wall and is located at the bottom of the annular groove, after being cut second shear pin, upper pawl spring
Ball seat, inner cylinder and lower pawl spring ball seat can move down a segment distance and by annular groove to the spacing of first shear pin
Stopping is continued traveling downwardly；
The upper pawl spring ball seat and lower pawl spring ball seat offer the body of through hole, described body one end end including center
Outer wall is provided with annular flange, and is cut along the body circumferencial direction is uniform from multiple tracks is offered vertically with one end end face
Seam, makes the upper pawl spring ball seat top be formed with many claw structures that can be shunk and discharge；The annular of the upper pawl spring ball seat
Flange is located at top, and the annular flange of the lower pawl spring ball seat is located at bottom；Offered on the outer tube inner wall one with it is described
The adaptable first annular groove of the annular flange of upper pawl spring ball seat, the annular flange of the upper pawl spring ball seat is arranged on described the
In one annular groove, the upper pawl spring ball seat is set to be in release conditions, the lower pawl spring ball seat is contraction state；
Second annular groove consistent with the first annular depth of groove, and institute are further opened with the outer tube inner wall
State the neighbouring lower pawl spring ball seat bottom in the second annular groove top to set, after second shear pin is cut, connect successively
Upper pawl spring ball seat, inner cylinder and the lower pawl spring ball seat for connecing are descending, the upper pawl spring ball seat is transformed to contraction state, the lower pawl spring
Ball seat is transformed to release conditions；The axial length of second annular groove and the inner cylinder and the axial direction of the lower pawl spring ball seat
Length is adapted；
Inner sliding sleeve is provided with the outer tube inner wall and below second annular groove, the inner sliding sleeve passes through
Peripherally disposed multiple 3rd shear pins are fixed on the outer barrel；Multiple is offered on the side wall of the outer barrel
The nozzle being along the circumferential direction distributed, for carrying out hydraulic jet perforation operation；On outer tube inner wall and under the spray-hole
Side offers at least 2 along the circumferential direction uniform radial blind holes, is offered vertically and radial blind holes from the outer barrel bottom
The consistent and along the circumferential direction uniform axial blind hole of quantity, every radial blind holes are with axial blind hole difference every described one by one
Correspond to and formed connection and constitute packer feed pathway；The central tube outer sheath is equipped with packing element；The top surface of the packing element is against
On the bottom surface of the outer barrel.
Further, the upper pawl spring ball seat and the lower pawl spring ball seat internal diameter in the released state are all higher than in described
The internal diameter of sliding sleeve；The internal diameter one of the upper pawl spring ball seat and the lower pawl spring ball seat internal diameter and the inner sliding sleeve in contraction state
Cause.
Further, the outer barrel top is threaded with the top connection for connected pipes；Central tube bottom spiral shell
Line is connected with the lower contact for connected pipes.
Further, packing element two ends outer wall caves inward and is formed with for being set with the first packing element protective case and second
The ring-shaped step of packing element protective case, makes the lower surface and described second of the annular boss of the first packing element protective case inner side formation
The upper surface of the annular boss that packing element protective case inner side is formed is press-fitted to the ring-shaped step on the outer wall of the packing element two ends respectively
On end face.
Further, the second packing element protective case downside outer wall caves inward and is formed with ring-shaped step, second glue
Cylinder protective case downside outer wall caves inward and is formed with ring-shaped step, and the second packing element protective case outer sheath is slidingly sealed equipped with one
Cover and the set upside that is slidingly sealed is threadedly coupled fixation with the second packing element protective case, support the set top that is slidingly sealed
On the ring-shaped step lower surface of the second packing element protective case outer wall；The set downside inwall that is slidingly sealed caves inward to be formed
There is ring-shaped step, the set inner side that is slidingly sealed is set with and is fixed with a spacing ring, the spacing ring top is against the cunning
On the lower surface of the ring-shaped step of movable sealing sleeve downside inwall；The lower contact outer wall downside caves inward and is formed with ring-shaped step
And the external diameter of recess is adapted with the internal diameter of described spacing ring；The lower contact outside is set with and is fixed with a back of the body cap, institute
State back of the body cap top and be against described being slidingly sealed on the bottom surface of set and the spacing ring.
A kind of multistage fracturing process pipe string constituted using above-mentioned perforation/pressure break/packing integrated apparatus, including set successively
Multi-openings/pressure break/packing integrated apparatus, sand blast sliding sleeve, hydraulic ejector open in usual, ball-and-seat, screen casing and the guiding put
Head；Each described perforation/pressure break/packing integrated apparatus, between sand blast sliding sleeve, hydraulic ejector and ball-and-seat pass through oil pipe phase
Connect.
Further, the perforation/pressure break/packing integrated apparatus top nearest apart from well head is connected successively by many
The oil pipe for connecing is extended at well head, and a safety joint is also associated between oil pipe.
Further, the described upper pawl spring ball seat and the lower claw in each described perforation/pressure break/packing integrated apparatus
Spring ball seat internal diameter in the same state is consistent；Upper pawl spring ball seat in multiple perforation/pressure break/packing integrated apparatus with
The interior of the lower pawl spring ball seat is sequentially reduced at well head at shaft bottom without leave, and each described perforation/pressure break/packing
Integrated apparatus are provided with two consistent pressure break balls of diameter, and the diameter of pressure break ball and upper pawl spring ball seat, lower pawl spring ball seat and
The internal diameter of inner sliding sleeve is adapted.
Compared with prior art, the perforation/pressure break/packing integrated apparatus put into the ball of same size by priority twice
The unlatching step by step of corresponding hydraulic ejector, packer and sand blast sliding sleeve is completed, does not influence to be segmented series；Each hydraulic ejector
The perforating job of correspondence interval is only carried out, perforation efficiency is high；Pressing crack construction is carried out by sand blast sliding sleeve, operational discharge capacity is not influenceed；
Packer is setting successively, and the pressure-bearing time is short, and sealing effectiveness is relatively reliable, and can real-time monitoring casing pressure (strata pressure) change
Change, can effectively pre- sand-blockage；During construction upper strata, lower floor's packer is unsealed automatically, and tubing string easily rises；Using multiple perforations/
The multistage fracturing process pipe string that pressure break/packing integrated apparatus are assembled into can one-trip string realize perforation, pressure break, mechanical packing
Integration, it is simple to operate, safe and reliable, it is to avoid hydrocarbon contamination during perforation, construction period is shortened, reduce operation
Cost.
Brief description of the drawings
Fig. 1 is the structural representation of perforation/pressure break/packing integrated apparatus of the invention；
Fig. 2 is Fig. 1 close-up schematic views；
Fig. 3 is the structural representation of multistage fracturing process pipe string of the invention；
Fig. 4 is to throw first structural representation of pressure break ball to perforation/pressure break of the invention/packing integrated apparatus；
Fig. 5 is the descending contraction of upper pawl spring ball seat, lower pawl spring ball seat in perforation/pressure break/packing integrated apparatus of the invention
First pressure break ball comes downwards to the structural representation at inner sliding sleeve after descending release；
Fig. 6 is that the dynamic inner sliding sleeve of first pressure break spherical zone in perforation/pressure break/packing integrated apparatus of the invention comes downwards to
Structural representation at central tube；
Fig. 7 is to throw second structural representation of pressure break ball to perforation/pressure break of the invention/packing integrated apparatus；
Fig. 8 is that upper pawl spring ball seat comes downwards to pressure break passage open shape in perforation/pressure break/packing integrated apparatus of the invention
Structural representation under state.
Specific embodiment
Below in conjunction with the accompanying drawings and specific embodiment the present invention is described further, but following embodiments are absolutely not to this hair
It is bright to have any limitation.
As shown in figure 1, perforation/pressure break/packing the integrated apparatus include the top connection being threadedly coupled successively from top to bottom
301st, outer barrel 310, central tube 315 and lower contact 317；Wherein, top connection 301 is threaded in the top inner side of outer barrel 310, under
Joint 317 is threaded in the Basolateral of central tube 315, top connection 301 and lower contact 317 be respectively used to device top and
The oil pipe connection of lower section；
It is provided with upper pawl spring ball seat 302, inner cylinder 303 and the lower pawl spring ball being sequentially connected from top to bottom in the inner side of outer barrel 310
Seat 306, is integrally formed；Upper pawl spring ball seat 302, inner cylinder 303 and the lower pawl spring ball seat 306 being sequentially connected are by circumferentially side
It is fixed on outer barrel 310 to 4~6 the second shear pins 305 being uniformly arranged on inner cylinder 303 and outer barrel 310；
An annular groove is machined with the outer wall of inner cylinder 303 positioned at the top of the second shear pin 305, is justified along outer barrel 310
4~6 the first shear pins 304 that circumferential direction is set pass the side wall of outer barrel 310 and are located at the bottom of annular groove, make second to cut
Cut after pin 305 cut, upper pawl spring ball seat 302, inner cylinder 303 and the lower pawl spring ball seat 306 being sequentially connected can carry out first
It is secondary descending, and Bottom Runby is equal with annular groove axial height, and the first shear pin 304 is faced by annular groove top end wall
It is spacing and stop descending；
Along the circumferential direction offering six on the outer wall of outer barrel 310 positioned at the top of the first shear pin 304 makes in device
The outer pressure break passage 318 for forming connection；Because pressure break passage 318 is arranged on the position of the closure of inner cylinder 303, therefore initial
Under state, all closings of inlet opening 318 are prevented the inside and outside circulation of liquid in well by inner cylinder 303；Pressure break passage 318 is apart from inner cylinder 303
The distance on top makes still to be blocked after inner cylinder 303 is descending for the first time more than the axial length of the annular groove on the outer wall of inner cylinder 303
Inlet opening 318；It is good to ensure the sealing at the structure, respectively processed at the outer wall of the close top of inner cylinder 303 and bottom
There is an annular groove for being built-in with sealing ring；The shearing force of first shear pin 304 is more than second shear pin
305 shearing force；
Upper pawl spring ball seat 302 and lower pawl spring ball seat 306 offer the body of through hole including center, are set on its one end outer wall
There is annular flange, and from multiple tracks is offered vertically along the uniform slot of body circumferencial direction with one end end face, make pawl spring ball
302 tops of seat are formed with many claw structures that can be shunk and discharge by external influence；The convex annular of upper pawl spring ball seat 302
Edge is located at top, and the annular flange of lower pawl spring ball seat 306 is located at bottom；One is offered on the inwall of outer barrel 310 with upper pawl spring ball
The adaptable first annular groove of the annular flange of seat 302, the annular flange of upper pawl spring ball seat 302 is arranged on first annular groove
It is interior, pawl spring ball seat 302 is in release conditions, lower pawl spring ball seat 306 is contraction state；Upper pawl spring ball seat 302 and lower pawl spring
Internal diameter of the ball seat 306 in equal state is consistent；
Second annular groove consistent with first annular depth of groove, and the second ring are further opened with the inwall of outer barrel 310
The neighbouring lower bottom of pawl spring ball seat 306 in connected in star top is set, after the second shear pin 305 is cut, the upper pawl spring being sequentially connected
Ball seat 302, inner cylinder 303 and lower pawl spring ball seat 306 carry out for the first time it is descending, pawl spring ball seat 302 is transformed to contraction state, under
Pawl spring ball seat 306 is transformed to release conditions；
The axial length of the second annular groove is consistent with the axial overall length of inner cylinder 303 and lower pawl spring ball seat 306, makes when the
After one shear pin 304 is cut, upper pawl spring ball seat 302, inner cylinder 303 and the lower pawl spring ball seat 306 being sequentially connected are carried out second
Come downwards to the lower bottom of pawl spring ball seat 306 and be press-fitted to the second annular groove bottom wall stopping, now pressure break passage 318 is opened, with
This simultaneously, upper pawl spring ball seat 302 remains retracted state, and lower pawl spring ball seat 306 remains release conditions；
Inner sliding sleeve 309 is provided with the inwall of outer barrel 310 and below the second annular groove, inner sliding sleeve 309 passes through edge
4~6 the 3rd shear pins 307 that circumferencial direction is set are fixed on outer barrel 310；The internal diameter of inner sliding sleeve 309 and upper pawl spring ball
Seat 302 is consistent with 306 internal diameter in a contracted state of lower pawl spring ball seat, and the internal diameter of inner sliding sleeve 309 is less than upper pawl spring ball seat 302
With 306 internal diameter in the released state of lower pawl spring ball seat, allow to the throwing by upper pawl spring ball seat 302 and lower pawl spring ball seat 306
Ball can not be by inner sliding sleeve 309；The top end face of the inner sliding sleeve 309 is processed as the conical surface being recessed to inner side, forms ball seat；
6~8 nozzles being along the circumferential direction distributed are offered on the side wall of the outer barrel 310 being provided with inner sliding sleeve 309
308, for carrying out hydraulic jet perforation operation；Equally, on the inwall of outer barrel 310 being provided with inner sliding sleeve 309 and positioned at spray
The lower section of perforation 308 offers two along the circumferential direction uniform radial blind holes, and two edges are offered vertically from the bottom of outer barrel 310
The uniform axial blind hole of circumferencial direction, the quantity of radial blind holes is consistent with the quantity of axial blind hole, and every radial blind holes with it is every
Bar axial blind hole is corresponded and forms connection and constitutes packer feed pathway 311 respectively；In an initial condition, inner sliding sleeve 309
Closure makes nozzle 308 and packer feed pathway 311 be closed state at nozzle 308 and packer feed pathway 311；For
Ensure that sealing at the structure is good, be respectively machined with the outer wall of the close top of inner sliding sleeve 309 and bottom one it is built-in
There is the annular groove of sealing ring；
Central tube 315 is threaded on the bottom inwall of outer barrel 310, forms central tube 315 descending to inner sliding sleeve 309
Position limiting structure；Inner sliding sleeve 309 and the interval setting of central tube 315, when inner sliding sleeve 309 is come downwards to 315 top of central tube, open spray
Mouth 308, carries out hydraulic jet perforation operation；Wherein, nozzle 308 is shaped as being introversive without leave in circular cone convergence type, i.e. nozzle 308
It is gradually reduced outward；
The outer sheath of central tube 315 is equipped with packing element 313, and its top is against on the bottom surface of outer barrel 310, bottom is press-fitted to lower contact
On 317 top surface；The first packing element protective case 312 and the second packing element protective case are respectively installed with the top of packing element 313 and low side
314；Specifically,
The top outer wall of packing element 313 caves inward be formed with first annular step and the second ring-shaped step from bottom to top successively,
The bottom outer wall of outer barrel 310 caves inward and is formed with the 3rd ring-shaped step, and the first packing element protective case 312 is threadedly attached in outer barrel
310 outsides, the inwall of the first packing element protective case 312 is central raised to be formed with the annular boss cooperated with the second ring-shaped step,
The bottom of outer barrel 310 is set to be press-fitted on the top surface of packing element 313 by annular boss, the shoulder to the top of packing element 313 is protected, it is high
Press liquid makes packing element 313 expand completion by entering gap between packing element 313 and central tube 315 in feed pathway 311
Set；
As shown in Fig. 2 the bottom outer wall of packing element 313 caves inward be formed with fourth annular step and the 5th from top to bottom successively
Ring-shaped step, the upper inside walls of the second packing element protective case 314 and downside outer wall cave inward and are respectively formed with the 6th annular table
Rank and the 7th ring-shaped step；Second packing element protective case 314 is sleeved on the outer lower portion of packing element 313 and by the 6th ring-shaped step and glue
The fourth annular step and the 5th ring-shaped step of cylinder 313 are cooperated, and the shoulder to packing element 313 is protected；Second glue
The cylinder outer sheath of protective case 314 is slidingly sealed set 316 equipped with one and the upside of set 316 that is slidingly sealed is protected with second packing element
The threaded connection of set 314 is fixed, and 316 tops of set that are slidingly sealed is against on the lower surface of the 7th ring-shaped step；The slip
The downside inwall of sealing shroud 316 caves inward and is formed with the 8th ring-shaped step, described to be slidingly sealed the inner side of set 316 suit and screw thread company
Connect and be fixed with a spacing ring 319, the top of the spacing ring 319 is against on the lower surface of the 8th ring-shaped step；Under described
The outer wall of joint 317 downside caves inward and is formed with the 9th ring-shaped step and in the external diameter of recess and described spacing ring 319
Footpath is adapted；Under original state, one is left between the lower surface of the ring-shaped step of the top of spacing ring 319 and the outer wall of lower contact 317
Section annular space space；When spacing ring 319 is up with packing element expansion, the lower surface of the ring-shaped step of the outer wall of lower contact 317 is to limit
The Top Runby of position ring 319 carries out spacing, prevents the second packing element protective case 314 excessively up；The outside of the lower contact 317 suit
And threaded connection is fixed with a back of the body cap 320, the top of the back of the body cap 320 is against described being slidingly sealed and covers 316 and the spacing ring 319
Bottom surface on.
Additionally, connecting in the threaded connection place of central tube 315 and outer barrel 310, in central tube 315 and the screw thread of lower contact 317
The place of connecing, the threaded connection place of the first packing element protective case 312 and outer barrel 310, the second packing element protective case 314 and it is slidingly sealed set 316
Threaded connection place and be slidingly sealed set 316 with the sealing surface contact position of lower contact 317 be provided with a sealing ring.
As shown in figure 3, for totally four fractured layers designed in target well, the multistage fracturing process pipe string is included successively
Three perforations/pressure break/packing integrated apparatus 3, the second perforation/pressure break/packing integrated apparatus 3, the first perforation/pressure for setting
Split/insulate integrated apparatus 3, sand blast sliding sleeve 4, hydraulic ejector open in usual 5, ball-and-seat 6, screen casing 7 and guide head 8；Each institute
State perforation/pressure break/packing integrated apparatus 3, mutually interconnected by oil pipe 1 between sand blast sliding sleeve 4, hydraulic ejector 5 and ball-and-seat 6
Connect, to ensure that it has certain spacing, different fractured layers can be respectively corresponded in underground.
Wherein, connected successively by many on the perforation/pressure break/packing integrated apparatus 3 top nearest apart from well head
The oil pipe 1 for connecing is extended at well head, and a safety joint 2 is also associated between oil pipe 1.
In addition, sand blast sliding sleeve 4 used in the multistage fracturing process pipe string, hydraulic ejector open in usual 5, ball-and-seat 6, sieve
Pipe 7 and guide head 8 are presently commercially available common equipment.
Upper pawl spring ball seat 302 and the lower pawl spring ball seat 306 in multiple perforation/pressure break/packing integrated apparatus 3
It is interior without leave at well head to being sequentially reduced at the shaft bottom, be easy to control hierarchy pressing crack construction；Each perforation/pressure break/envelope
Two consistent pressure break balls of diameter are provided with every integrated apparatus, and the diameter of pressure break ball is slightly less than pawl spring ball seat and lower pawl spring
Internal diameter when ball seat discharges, and more than the internal diameter of inner sliding sleeve, enables pressure break ball when upper pawl spring ball seat and lower pawl spring ball seat discharge
Enough pass through, and can not pass through under contraction state.Sand blast sliding sleeve 4 is furnished with corresponding pressure break ball.
When carrying out fracturing work using the multistage fracturing process pipe string, multistage fracturing process pipe string is assembled first,
Wherein, the first fractured layer, the second fractured layer, the 3rd fractured layer and the 4th are followed successively by from bottom to top to the pressing crack construction layer for designing
Fractured layer.Specifically, in the multistage fracturing process pipe string sand blast sliding sleeve 4, hydraulic ejector 5 pairs are applied to the first fractured layer
Carry out pressing crack construction；First perforation/pressure break/packing integrated apparatus 3 pairs are applied to carry out pressing crack construction to the second fractured layer；The
Two perforations/pressure break/packing integrated apparatus 3 pairs are applied to carry out pressing crack construction to the 3rd fractured layer；Three perforations/pressure break/envelope
Every integrated apparatus, 3 pairs are applied to carry out pressing crack construction to the 4th fractured layer.Comprise the following steps that：
S1, the multistage fracturing process pipe string that will be connected are transferred to design attitude, and reacting cycle well-flushing is carried out from screen casing 7；
Well-flushing is finished, and puts into low-density ball, and build the pressure closure oil pipe passage in tubing string；
S2, hydraulic jet perforation is carried out from hydraulic ejector open in usual 5 by infusion conventional program, then put into the first order
Pressure break ball opens sand blast sliding sleeve 6, carries out ground floor fracturing work；
After S3, ground floor construction terminate, as shown in figure 4, to putting into the in the first perforation/pressure break/packing integrated apparatus 3
Two layers of first pressure break ball, ball falls within lower pawl spring ball seat 306, builds the pressure, and cuts the second shear pin 305, as shown in figure 5, on
The descending rear release of ball seat, lower pawl spring ball seat 306, first pressure break ball of the second layer is formed after the descending contraction of pawl spring ball seat 302 to continue
It is descending, treat that pressure break ball is fallen within inner sliding sleeve 309, build the pressure, the 3rd shear pin 307 is cut, as shown in fig. 6, inner sliding sleeve 309 is descending
To the top of central tube 315, expose nozzle 318 and feed pathway 311, second layer hydraulic jet perforation operation is carried out, while high pressure
Liquid makes packing element 313 expand completion seat by entering gap between packing element 313 and central tube 315 in feed pathway 311
Envelope, after the completion of second layer hydraulic jet perforation operation, as shown in fig. 7, input second pressure break ball of the second layer falls in upper pawl spring ball
On seat 302, build the pressure, the first shear pin 304 is cut, as shown in figure 8, upper pawl spring ball seat 302, inner cylinder 303 and lower pawl spring ball seat
306 continue traveling downwardly, and open pressure break passage 318, carry out the pressing crack construction operation of the second interval；
After second layer pressing crack construction terminates, in the S3 that repeated the above steps to the second perforation/pressure break/packing integrated apparatus 3
Operation, be sequentially completed hydraulic jet perforation, packer setting and the pressing crack construction operation of third layer section；
After third layer pressing crack construction terminates, in the S3 that repeated the above steps to three perforations/pressure break/packing integrated apparatus 3
Operation, be sequentially completed hydraulic jet perforation, packer setting and the pressing crack construction operation of the 4th interval；Realize that fixed tubular column is penetrated
Hole, pressure break, packer packing are every integrated multistage pressing crack construction.
Claims (8)
1. a kind of perforation/pressure break/packing integrated apparatus, it is characterised in that including outer barrel (310) and be threaded in described outer
Central tube (315) on the inwall of cylinder (310) bottom；
The outer barrel (310) inner side be provided with from top to bottom be sequentially connected upper pawl spring ball seat (302), inner cylinder (303) and under
Pawl spring ball seat (306), and three is by the multiple that is circumferentially disposed on the inner cylinder (303) and the outer barrel (310)
Second shear pin (305) is fixed on the outer barrel (310)；It is being provided with outer barrel (310) outer wall at the inner cylinder (303) place
On along the circumferential direction offer multiple pressure break passages (318)；An annular groove is machined with inner cylinder (303) outer wall, along institute
Multiple first shear pins (304) for stating the setting of outer barrel (310) circumferencial direction pass the outer barrel (310) side wall and are located at described
The bottom of annular groove；
The upper pawl spring ball seat (302) and lower pawl spring ball seat (306) offer the body of through hole, the body one including center
End end outer wall is provided with annular flange, and uniform along the body circumferencial direction from multiple tracks is offered vertically with one end end face
Slot, upper pawl spring ball seat (302) top is formed with many claw structures that can be shunk and discharge, the upper pawl spring ball
The annular flange of seat (302) is located at top, and the annular flange of the lower pawl spring ball seat (306) is located at bottom；In the outer barrel
(310) offer a first annular groove adaptable with the annular flange of the upper pawl spring ball seat (302) on inwall, it is described on
The annular flange of pawl spring ball seat (302) is arranged in the first annular groove, makes the upper pawl spring ball seat (302) in release
State, the lower pawl spring ball seat (306) is contraction state；
Second annular groove consistent with the first annular depth of groove is further opened with the outer barrel (310) inwall, and
Neighbouring lower pawl spring ball seat (306) bottom in second annular groove top is set, and makes the upper pawl spring ball seat (302) and institute
State lower pawl spring ball seat (306) it is descending after be transformed to contraction state and release conditions respectively；The axial direction of second annular groove
Length is adapted with the axial length of the inner cylinder (303) and the lower pawl spring ball seat (306)；
Inner sliding sleeve (309), the interior cunning are provided with the outer barrel (310) inwall and positioned at second annular groove lower section
Set (309) is fixed on the outer barrel (310) by peripherally disposed multiple 3rd shear pins (307)；Described
Multiple nozzles (308) being along the circumferential direction distributed are offered on the side wall of outer barrel (310)；On outer barrel (310) inwall and it is located at
Nozzle (308) lower section offers at least 2 along the circumferential direction uniform radial blind holes, from the outer barrel (310) bottom edge
Axially offer axial blind hole consistent with radial blind holes quantity and along the circumferential direction uniform, every radial blind holes with every
The axial blind hole is corresponded and forms connection and constitutes packer feed pathway (311) respectively；Central tube (315) outside
It is set with packing element (313)；The top surface of the packing element is against on the bottom surface of the outer barrel (310).
2. perforation/pressure break/packing integrated apparatus according to claim 1, it is characterised in that the upper pawl spring ball seat
And the lower pawl spring ball seat (306) internal diameter in the released state is all higher than the internal diameter of the inner sliding sleeve (309) (302)；It is described
The internal diameter one of upper pawl spring ball seat (302) and the lower pawl spring ball seat (306) internal diameter and the inner sliding sleeve (309) in contraction state
Cause.
3. perforation/pressure break/packing integrated apparatus according to claim 2, it is characterised in that outer barrel (310) top
End is threaded with top connection (301)；Central tube (315) bottom is threaded with lower contact (317).
4. perforation/pressure break/packing integrated apparatus according to claim 3, it is characterised in that the packing element (313) two
End outer wall caves inward the annular being formed with for being set with the first packing element protective case (312) and the second packing element protective case (314)
Step, makes the lower surface of the annular boss of the first packing element protective case (312) inner side formation and the second packing element protective case
(314) upper surface of the annular boss that inner side is formed is press-fitted to the ring-shaped step on the outer wall of the packing element (313) two ends respectively
On end face.
5. perforation/pressure break/packing integrated apparatus according to claim 4, it is characterised in that the second packing element protection
Set (314) downside outer wall is caved inward and is formed with ring-shaped step, and the second packing element protective case (314) outer sheath is slided equipped with one
Sealing shroud (316) and it is described be slidingly sealed set (316) upside be threadedly coupled fixation with the second packing element protective case (314), make
Described set (316) top that is slidingly sealed is against on the ring-shaped step lower surface of the second packing element protective case (314) outer wall；It is described
It is slidingly sealed set (316) downside inwall to cave inward and be formed with ring-shaped step, set (316) inner side that is slidingly sealed is set with and consolidates
Surely there is a spacing ring (319), the spacing ring (319) top is against the annular for being slidingly sealed set (316) downside inwall
On the lower surface of step；Lower contact (317) outer wall downside cave inward be formed with the external diameter of ring-shaped step and recess with
The internal diameter of described spacing ring (319) is adapted；The lower contact outside is set with and is fixed with a back of the body cap (320), the back of the body cap
(320) top is against described being slidingly sealed on the bottom surface of set (316) and the spacing ring (319).
6. the multistage that a kind of perforation/pressure break/packing integrated apparatus using as any one of claim 2~5 are constituted
Fracturing technology tubing string, it is characterised in that including the multi-openings/pressure break/packing integrated apparatus (3), the sandblasting cunning that set gradually
Set (4), hydraulic ejector open in usual (5), ball-and-seat (6), screen casing (7) and guide head (8)；Each perforation/pressure break/packing one
Body makeup is put and be connected with each other by oil pipe (1) between (3), sand blast sliding sleeve (4), hydraulic ejector (5) and ball-and-seat (6).
7. multistage fracturing process pipe string according to claim 6, it is characterised in that the perforation nearest apart from well head/
Pressure break/packing integrated apparatus (3) top is extended at well head by many oil pipes being sequentially connected (1), between oil pipe (1)
It is also associated with a safety joint (2).
8. multistage fracturing process pipe string according to claim 6, it is characterised in that each described perforation/pressure break/packing one
Internal diameter of the described upper pawl spring ball seat (302) with the lower pawl spring ball seat (306) in the same state during body makeup is put is consistent；It is many
Upper pawl spring ball seat (302) and the lower pawl spring ball seat (306) in the individual perforation/pressure break/packing integrated apparatus (3) it is interior
It is sequentially reduced at shaft bottom at well head without leave, and each the perforation/pressure break/packing integrated apparatus (3) is matched somebody with somebody
There is the consistent pressure break ball of two diameters.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710155635.2A CN106869893B (en) | 2017-03-16 | 2017-03-16 | Perforation/pressure break/packing integrated apparatus and its multistage fracturing process pipe string |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108166965A (en) * | 2018-02-27 | 2018-06-15 | 中国石油集团渤海钻探工程有限公司 | A kind of abrasive perforating, pressure break and packing integrated apparatus |
| CN109469470A (en) * | 2018-12-20 | 2019-03-15 | 中国海洋石油集团有限公司 | A kind of horizontal well naked eye staged fracturing equipment |
| CN112483009A (en) * | 2019-09-12 | 2021-03-12 | 中国石油化工股份有限公司 | Fracturing connector and well cementation tubular column comprising same |
| CN114592845A (en) * | 2022-02-21 | 2022-06-07 | 太原理工大学 | Repeatable hydraulic jet slotting and fracturing combined operation device and use method |
| CN114876370A (en) * | 2022-06-01 | 2022-08-09 | 中国石油大学(北京) | Multi-point directional jet drilling tool and method of use |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6446727B1 (en) * | 1998-11-12 | 2002-09-10 | Sclumberger Technology Corporation | Process for hydraulically fracturing oil and gas wells |
| CN2866812Y (en) * | 2005-10-18 | 2007-02-07 | 中国石油天然气股份有限公司 | Natural gas well separate fracturing merging-layer extracting integral tubelar column |
| CN202544829U (en) * | 2012-04-24 | 2012-11-21 | 中国石油天然气股份有限公司 | Drivepipe sliding sleeve |
| CN103184856A (en) * | 2013-02-28 | 2013-07-03 | 中国石油天然气集团公司 | Hydraulic jet packer applicable to multilevel hydraulic jet fracturing |
| CN103266875A (en) * | 2013-02-28 | 2013-08-28 | 中国石油集团川庆钻探工程有限公司长庆井下技术作业公司 | Fracturing operation method of multistage hydraulic jet staged fracturing tubular column |
| CN104153752A (en) * | 2014-08-26 | 2014-11-19 | 中国石油集团川庆钻探工程有限公司长庆井下技术作业公司 | Hydraulic jetting tubing sand filling stratified multi-stage fracturing technology for horizontal well |
| CN104481487A (en) * | 2014-11-12 | 2015-04-01 | 中国石油化工股份有限公司 | Multi-stage, multi-gap and multi-section fracturing method for horizontal well |
| CN105715225A (en) * | 2014-12-03 | 2016-06-29 | 爱迪斯新技术有限责任公司 | Step-by-step pressure-guide packer, step-by-step pressure-guide layering fracturing device and fracturing method |
| CN105986780A (en) * | 2015-02-15 | 2016-10-05 | 赵华 | Permanent type plug-control sand blasting slide sleeve, fracturing string and plug-control staged fracturing technique |
-
2017
- 2017-03-16 CN CN201710155635.2A patent/CN106869893B/en active Active
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6446727B1 (en) * | 1998-11-12 | 2002-09-10 | Sclumberger Technology Corporation | Process for hydraulically fracturing oil and gas wells |
| CN2866812Y (en) * | 2005-10-18 | 2007-02-07 | 中国石油天然气股份有限公司 | Natural gas well separate fracturing merging-layer extracting integral tubelar column |
| CN202544829U (en) * | 2012-04-24 | 2012-11-21 | 中国石油天然气股份有限公司 | Drivepipe sliding sleeve |
| CN103184856A (en) * | 2013-02-28 | 2013-07-03 | 中国石油天然气集团公司 | Hydraulic jet packer applicable to multilevel hydraulic jet fracturing |
| CN103266875A (en) * | 2013-02-28 | 2013-08-28 | 中国石油集团川庆钻探工程有限公司长庆井下技术作业公司 | Fracturing operation method of multistage hydraulic jet staged fracturing tubular column |
| CN104153752A (en) * | 2014-08-26 | 2014-11-19 | 中国石油集团川庆钻探工程有限公司长庆井下技术作业公司 | Hydraulic jetting tubing sand filling stratified multi-stage fracturing technology for horizontal well |
| CN104481487A (en) * | 2014-11-12 | 2015-04-01 | 中国石油化工股份有限公司 | Multi-stage, multi-gap and multi-section fracturing method for horizontal well |
| CN105715225A (en) * | 2014-12-03 | 2016-06-29 | 爱迪斯新技术有限责任公司 | Step-by-step pressure-guide packer, step-by-step pressure-guide layering fracturing device and fracturing method |
| CN105986780A (en) * | 2015-02-15 | 2016-10-05 | 赵华 | Permanent type plug-control sand blasting slide sleeve, fracturing string and plug-control staged fracturing technique |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108166965A (en) * | 2018-02-27 | 2018-06-15 | 中国石油集团渤海钻探工程有限公司 | A kind of abrasive perforating, pressure break and packing integrated apparatus |
| CN108166965B (en) * | 2018-02-27 | 2023-09-05 | 中国石油集团渤海钻探工程有限公司 | Sand blasting perforation, fracturing and packing integrated device |
| CN109469470A (en) * | 2018-12-20 | 2019-03-15 | 中国海洋石油集团有限公司 | A kind of horizontal well naked eye staged fracturing equipment |
| CN112483009A (en) * | 2019-09-12 | 2021-03-12 | 中国石油化工股份有限公司 | Fracturing connector and well cementation tubular column comprising same |
| CN112483009B (en) * | 2019-09-12 | 2022-11-25 | 中国石油化工股份有限公司 | Fracturing connector and well cementation tubular column comprising same |
| CN114592845A (en) * | 2022-02-21 | 2022-06-07 | 太原理工大学 | Repeatable hydraulic jet slotting and fracturing combined operation device and use method |
| CN114876370A (en) * | 2022-06-01 | 2022-08-09 | 中国石油大学(北京) | Multi-point directional jet drilling tool and method of use |
| CN114876370B (en) * | 2022-06-01 | 2023-03-28 | 中国石油大学(北京) | Multi-point directional jet drilling tool and method of use thereof |
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