CN105822278B - It is a kind of to wait latus rectums segmented fracturing device and method - Google Patents
It is a kind of to wait latus rectums segmented fracturing device and method Download PDFInfo
- Publication number
- CN105822278B CN105822278B CN201610341730.7A CN201610341730A CN105822278B CN 105822278 B CN105822278 B CN 105822278B CN 201610341730 A CN201610341730 A CN 201610341730A CN 105822278 B CN105822278 B CN 105822278B
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- Prior art keywords
- sliding sleeve
- anchor fluke
- sealing drum
- fracturing
- opener
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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
-
- 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
- E21B33/128—Packers; Plugs with a member expanded radially by axial pressure
- E21B33/1285—Packers; Plugs with a member expanded radially by axial pressure by fluid pressure
-
- 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
- E21B34/00—Valve arrangements for boreholes or wells
- E21B34/06—Valve arrangements for boreholes or wells in wells
- E21B34/14—Valve arrangements for boreholes or wells in wells operated by movement of tools, e.g. sleeve valves operated by pistons or wire line tools
Abstract
The invention discloses a kind of equal latus rectums segmented fracturing device and methods,Device includes fracturing sliding bush and sliding sleeve opener,Sliding sleeve interior sealing tube length degree reduces step by step from top to bottom,Every grade of anchor fluke length component is corresponded with sealing drum length,Sliding sleeve opener continues to slide to next stage if shorter than sealing drum,Until meeting the sealing drum of corresponding length,Opener is pumped to a most upper sliding sleeve,Anchor fluke component locks sealing drum,Shear pin is cut in pressurization,Anchor fluke drives sealing drum to glide,Open sliding sleeve,Anchor fluke component is detached from sealing drum disengaging because squeezing contracting inclined-plane,The opener slides onto at next sliding sleeve,Until after opening most next sliding sleeve,The opener is terminated in together with sealing drum downlink at shoulder block,Improve discharge capacity in cylinder,Break up closure rupture disk,Liquid enters hydraulic cavities,Packing element component seal shaft,After the completion of pressure break,Set pushing cylinder dissolving,Packing element component unseals.The present invention may be implemented batch grade open sliding sleeve and ensure that full pit shaft internal diameter is consistent after constructing.
Description
Technical field
Present invention relates particularly to a kind of equal latus rectums segmented fracturing device and methods.
Background technology
The completion of shale gas horizontal well mainly uses casing cementing, multistage open hole packer to add both sides of sliding sleeve at present
Formula.
Multistage open hole packer adds the completion mode of pitching classification sliding sleeve that can save casing cementing expense, and reservoir reconstruction is applied
The speed of work is fast, but the completion mode, on the one hand since the series of segmentation is limited, the latus rectum of toe well section is limited, limits storage
The scale of layer transformation；On the other hand when sliding sleeve failure cannot be opened, corresponding well section, the well left after job execution can only be given up
Cylinder space is also limited, can not follow up substantially；At the same time, since the sealing effect of packers at different levels is difficult to detect,
So long term seal can not ensure.
For casing cementing completion, pumping bridge plug may be used and carry out segmentation reservoir reconstruction with perforation combined tech, be segmented
There is no limit may be implemented massive hydraulic fracture transformation, complete cased borehole space can be left after operation, convenient for taking series
Follow-up operation, but this mode speed of application is slower, and duty cycle is long；Tripping in casing packer after perforation can also be used
Sliding sleeve tubing string is added to carry out segmentation transformation, but segmentation sum of series transformation scale is all smaller, when using sand fracturing mode, it is difficult to rise
Go out working string.
For the defect of both above completion modes, external large-scale application sliding sleeve of bushing staged fracturing skill in recent years
Art, the country also has unit introduction using TAP etc. without differential sliding sleeve technology and has carried out production domesticization research, while also having unit to throwing
Ball-type sliding sleeve of bushing and intelligent sliding sleeve technology are studied, but these classification sliding sleeves cannot ensure that full pit shaft etc. is logical simultaneously
Diameter and batch grade open sliding sleeve carry out pressure break.
Invention content
The purpose of the present invention is to provide a kind of equal latus rectums segmented fracturing device and methods, it may be implemented same pressure break and slides
Batch grade of all sliding sleeves opens and ensures that full pit shaft internal diameter is consistent after constructing in set.
The technical solution adopted by the present invention to solve the technical problems is：
A kind of equal latus rectums segmented fracturing device, the device include fracturing sliding bush and for opening institute in the fracturing sliding bush
There is the sliding sleeve opener of sliding sleeve；Wherein,
It is disposed at least one sliding sleeve on the fracturing sliding bush, by casing connection between adjacent sliding sleeve, described sleeve pipe
Internal diameter is equal with the internal diameter of sliding sleeve, and the sliding sleeve includes the top connection being tightly connected and lower contact and connect on described for sealing
The sealing drum of all fluid channels on head, is connected between the sealing drum and top connection by shear pin, in the lower contact
It is located at sealing drum equipped with crowded contracting boss, in the top connection of most next sliding sleeve and squeezes between contracting boss equipped with shoulder block, the pressure break
The equal length of all sealing drums in sliding sleeve；
The sliding sleeve opener includes central shaft, be slidably located in respectively the central shaft lower part and middle part it is expansible
Packing element component and pushing cylinder mechanism and axial restraint be sleeved on the anchoring closing piece mechanism on the central shaft top, the center
The bottom of axis is equipped with positioning shaft shoulder, and the pushing cylinder mechanism is solvable solution structure, the anchoring with the bottom that packing element attached components touch
Closing piece mechanism includes cylindrical body and anchor fluke component, and the cylindrical body is erected at the top of the central shaft, and is pushed away with described
Hydraulic cavities are formed between cylinder mechanism, closure rupture disk is provided in the hydraulic cavities, is arranged on the outside of the lower port of the hydraulic cavities
There is sealing element, port is connected to the groove for being opened in the cylindrical body periphery thereon, and multiple anchor fluke components pass through activity
Ejector pin is mounted in the groove, and the anchor fluke component includes upper anchor fluke and lower anchor fluke, and the outside of the lower anchor fluke, which is equipped with, squeezes contracting
Inclined-plane and backstop are faced directly, and the crowded contracting inclined-plane is used to make anchor fluke component occur to squeeze contracting after contacting with the sealing drum or crowded contracting boss
To lock or unclamp the sealing drum, the backstop is faced directly for being carried out to entire sliding sleeve opener after being contacted with the shoulder block
Axial limiting.
According to the above technical scheme, which includes multiple fracturing sliding bushs and more with the multiple fracturing sliding bush phase configuration
The sealing drum length of a sliding sleeve opener, each fracturing sliding bush reduces step by step from top to bottom, every grade of anchor fluke length component and sealing
Tube length degree corresponds, and sliding sleeve sliding sleeve opener continues to slide to next stage if shorter than sealing drum, until meeting corresponding length
Sliding sleeve interior sealing cylinder.
According to the above technical scheme, the packing element component includes intermediate packing element, the end glue at the intermediate packing element both ends is arranged
Cylinder and back band in each end packing element outer end is set, between the intermediate packing element and end packing element, the end packing element and back band it
Between connected by inclined-plane.
According to the above technical scheme, the solvable solution structure is to set pushing cylinder, the pushing cylinder machine by what soluble material made
Structure further includes being fixedly mounted on the piston for setting pushing cylinder upper end.
According to the above technical scheme, it by being articulated and connected between the upper anchor fluke and lower anchor fluke, is set between the upper and lower anchor fluke
There is retaining groove, flat spring is provided in the retaining groove, cover board is installed on the flat spring, the both ends of the cover board are mounted on tubular
On ontology.
According to the above technical scheme, the maximum outer profile of the lower anchor fluke is located at the shoulder block and squeezes between contracting boss.
According to the above technical scheme, the anchoring closing piece mechanism further includes being mounted on hollow cylindrical body by unlocking pin
Interior unlock thimble, is equipped with the first gap between unlock thimble and the central shaft, the periphery of the unlock thimble is located at activity
The top of ejector pin is equipped with ejector pin groove, and one end of the activity ejector pin passes through cylindrical body top pressure on unlock thimble.
According to the above technical scheme, between the cylindrical body and pushing cylinder mechanism be equipped with the second gap, the central shaft it is upper
End is equipped with channel, closures rupture disk setting in channel, the both ends in the channel respectively with the first gap and the second gap
Connection, the groove is interior to be equipped with the through-hole being connected to first gap, the through-hole, the first gap, channel and the second gap
Form the hydraulic cavities of connection.
Correspondingly, the present invention provides a kind of equal latus rectums staged fracturing method, include the following steps：
S1, all fracturing sliding bushs in pit shaft are cleaned；
S2, above-mentioned sliding sleeve opener is pumped at a most upper sliding sleeve for the fracturing sliding bush for waiting for pressure break；
When S3, instantly anchor fluke reach the position of the sealing drum of the sliding sleeve, in the case where squeezing the interaction of contracting inclined-plane and sealing drum,
The protruding latching sealing drum of anchor fluke component；
S4, to increasing certain pressure in pit shaft, shear pin is cut, at this point, anchor fluke component drives sealing drum slide downward
A distance opens sliding sleeve；
S5, continue to pressurize, anchor fluke component drives sealing drum to continue to slide to the crowded contracting boss in lower contact, is squeezing
With under the interaction of crowded contracting boss, anchor fluke component automatically disengages sealing drum and slides to next sliding sleeve on contracting inclined-plane；
S6, step S3 to S5 is repeated, opens all sliding sleeves of the fracturing sliding bush one by one from top to bottom, until opening most next
After a sliding sleeve, sealing drum glide downwards are terminated in together with the sliding sleeve opener at shoulder block, continue, to pressurizeing in pit shaft, to break up
Block rupture disk so that the hydraulic cavities of the sliding sleeve opener are got through, and the liquid in pit shaft enters hydraulic cavities, into hydraulic cavities
Liquid under the action of liquid column hydrostatic pressure, push pushing cylinder mechanism slide downward so that packing element component is expanded with seal shaft, close
The pressure break of the fracturing sliding bush can be carried out after the completion of envelope；
S7, step S2 to S6 is repeated, pressure break is carried out after opening the sliding sleeve of each fracturing sliding bush one by one respectively；
S8, when each fracturing sliding bush complete pressure break after a certain period of time, the solvable solution structure of pushing cylinder actuator base is in fracturing fluid
It is slowly dissolved in environment, unseals packing element component.
According to the above technical scheme, this method further includes step：S9, the packing element component deblocking when all sliding sleeve openers
Afterwards, unlocking tool is put into pit shaft, is pumped and is hit the unlock thimble of the sliding sleeve opener of last input pit shaft, cut solution
Lock pin is followed closely so that unlock thimble slide downward realizes anchor fluke component until movable ejector pin slides into the ejector pin groove of unlock thimble
With the disengaging of sealing drum, in pit shaft under the action of fluid pressure, unlocking tool and a most upper sliding sleeve opener together to
Next sliding sleeve opener is hit in lower landing successively, realizes the de- of next sliding sleeve opener anchor fluke component and sealing drum
From last unlocking tool slides together with all sliding sleeve openers to shaft bottom.
The beneficial effect comprise that：The requirement that the present invention operates wellbore quality and tubing string tripping in is relatively low,
Batch grade may be implemented to open, when needing pressure break fracturing sliding bush, which is pumped to the fracturing sliding bush most
At a upper sliding sleeve, anchor fluke component pops up around, achievees the purpose that lock sealing drum automatically, pressurize into pit shaft, in pressure difference
Under the action of, shear pin is cut, and anchor fluke drives sealing drum slide downward, opens the fluid channel of the sliding sleeve top connection,
Under the action of squeezing contracting inclined-plane and squeezing contracting boss, anchor fluke component is detached from sealing drum, which slides onto downwards next
At a sliding sleeve, each sliding sleeve is opened successively, until after opening most next sliding sleeve, the sliding sleeve opener is together with sealing drum downlink
It terminates at lower shoulder block, improves discharge capacity in pit shaft, when well cylinder pressure is increased to design value, blocks rupture disk and be breached, hydraulic pressure
Chamber is connected to, and liquid enters hydraulic cavities, is pushed pushing cylinder mechanism to squeeze packing element component, is made packing element component Expansion sealing pit shaft, for the pressure
The pressure break for splitting sliding sleeve creates conditions, and after the pressure break for so completing each fracturing sliding bush from bottom to up, sets pushing cylinder and slowly dissolves, packing element
Component is shunk, and is unsealed.The present invention is also devised with unlock thimble, after the completion of the deblocking of all packing element components, hits most upper one
The unlock thimble of a sliding sleeve opener makes movable ejector pin fall into the ejector pin groove of unlock thimble, anchor fluke component and sealing drum
It disengages, finally under the thrust of well liquid within the cartridge, unlocking tool and a most upper sliding sleeve opener slide downwardly together,
Next sliding sleeve opener is hit successively, realizes the disengaging of next sliding sleeve opener anchor fluke component and sealing drum, finally
Unlocking tool is slid together with all sliding sleeve openers to shaft bottom, and pit shaft restores original size, all sliding sleeve latus rectums it is identical and
It is consistent with matched casing inner diameter, ensure follow-up working space.
Description of the drawings
Present invention will be further explained below with reference to the attached drawings and examples, in attached drawing：
Fig. 1 is the structural schematic diagram of sliding sleeve opener in the embodiment of the present invention；
Fig. 2 is the structural schematic diagram of sliding sleeve in the embodiment of the present invention；
Fig. 3 be sliding sleeve opener by it is non-designated need the slide bushing assembly opened when status diagram；
Fig. 4 is state when sliding sleeve opener reaches and be anchored the slide bushing assembly most upper sliding sleeve that specified needs are opened
Schematic diagram；
Fig. 5 is that sliding sleeve opener cuts shear pin opening sliding sleeve and prepares state signal of the automatic unlocking to downlink when
Figure；
Fig. 6 sliding sleeve openers reach shape when being anchored and open slide bushing assembly most next sliding sleeve that specified needs are opened
State schematic diagram；
State signal when Fig. 7 is packing element component Expansion sealing casing when the closure rupture disk of sliding sleeve opener is breached
Figure；
The status diagram that Fig. 8 is sliding sleeve opener when pushing cylinder mechanism dissolves and unseals downlink after packing element component.
In figure：1- unlock thimble, 1.1- ejector pins groove, 2- cylindrical bodies, 2.1- grooves, 2.2- through-holes, anchor fluke under 3-,
It is close that 3.1- squeezes contracting inclined-plane, 3.2- backstops are faced directly, 3.3- retaining grooves, 4- cover boards, 5- flat springs, 6- unlock pin, 7- activities ejector pin, 8-
Sealing, 9- central shafts, 9.1- positioning shaft shoulders, the channels 9.2-, 10- block rupture disk, 11- pistons, 12- pushing cylinders mechanism, 12.1- and sit
Seal pushing cylinder, 12.2- pistons, 14- packing elements component, 14.1- back bands, the ends 14.2- packing element, packing element among 14.3-, 15- top connections,
15.1- shoulder blocks, 15.2- fluid channels, 17- sealing drums, 18- shear pins, 19- lower contacts, 19.1- squeeze contracting boss, the upper anchors of 20-
Pawl, 100- hydraulic cavities, the first gaps 100.1-, the second gaps 100.2-.
Specific implementation mode
In order to make the purpose , technical scheme and advantage of the present invention be clearer, with reference to the accompanying drawings and embodiments, right
The present invention is further elaborated.It should be appreciated that described herein, specific examples are only used to explain the present invention, not
For limiting the present invention.
A kind of equal latus rectums segmented fracturing device, the device include fracturing sliding bush and for opening all cunnings in fracturing sliding bush
The sliding sleeve opener of set；Wherein,
As shown in Fig. 2, being disposed at least one sliding sleeve on fracturing sliding bush, pass through casing connection, casing between adjacent sliding sleeve
Internal diameter it is equal with the internal diameter of sliding sleeve, sliding sleeve includes the top connection 15 being tightly connected and lower contact 19 and for sealing top connection
The sealing drum 17 of all fluid channels 15.2, is connected between sealing drum 17 and top connection 15 by shear pin 18 on 15, under connect
First 19 interior are equipped with squeeze contracting boss 19.1, are located in the top connection of most next sliding sleeve between sealing drum 17 and crowded contracting boss 19.1 and set
There is a shoulder block 15.1, the equal length of all sealing drums in fracturing sliding bush, wherein sealing drum 17 is O-shaped by being arranged on four
Sealing ring in ring recess is tightly connected with top connection, and squeezing contracting boss 19.1 has bigger chamfering；
As shown in Figure 1, sliding sleeve opener includes central shaft 9, be slidably located in respectively 9 lower part of central shaft and middle part can
The packing element component 14 and pushing cylinder mechanism 12 and axial restraint of expansion are sleeved on the anchoring closing piece mechanism on 9 top of central shaft, in
The bottom of mandrel 9 is equipped with positioning shaft shoulder 9.1, for being limited to packing element component, pushing cylinder mechanism 12 and 14 phase of packing element component
The bottom of contact is solvable solution structure, and anchoring closing piece mechanism includes cylindrical body 2 and anchor fluke component, during cylindrical body 2 is erected at
The top of mandrel 9, and hydraulic cavities 100 are formed between pushing cylinder mechanism 12, it is provided in hydraulic cavities 100 and blocks rupture disk 10, liquid
It presses and is provided with sealing element 8 on the outside of the lower port of chamber 100, sealing element 8 is specially piston cylinder, port and is opened in cylindrical body thereon
The groove 2.1 of 2 peripheries is connected to, and multiple anchor fluke components are mounted on by movable ejector pin 7 in groove 2.1, and anchor fluke component includes upper anchor
The outside of pawl 20 and lower anchor fluke 3, lower anchor fluke 3 is equipped with crowded contracting inclined-plane 3.1 and backstop faces 3.2 directly, and crowded contracting inclined-plane 3.1 is used for and sealing
Cylinder 17 or crowded contracting boss 19.1 make anchor fluke component occur to squeeze contracting to lock or unclamp sealing drum 17 after contacting, and backstop faces 3.2 use directly
Axial limiting is carried out to entire sliding sleeve opener after being contacted with shoulder block 15.1.
In a preferred embodiment of the invention, the device include multiple fracturing sliding bushs and with the multiple fracturing sliding bush phase
Multiple sliding sleeve openers of configuration, the sealing drum length of each fracturing sliding bush reduce step by step from top to bottom, and every grade of anchor fluke component is long
Degree is corresponded with sealing drum length, and sliding sleeve sliding sleeve opener continues to slide to next stage if shorter than sealing drum, until meeting
The sliding sleeve interior sealing cylinder of corresponding length.That is, sliding sleeve opener and fracturing sliding bush are one-to-one relationships, it is each sliding
The distance between set two anchor flukes of opener are different, taper off relationship from top to bottom, a upper fracturing sliding bush interior sealing
The length of cylinder is more than the length of next fracturing sliding bush interior sealing cylinder adjacent thereto, and is more than and next fracturing sliding bush phase
The distance between the upper anchor fluke of the sliding sleeve opener of configuration and lower anchor fluke, when launching sliding sleeve opener into pit shaft, each
Sliding sleeve opener can only open the sliding sleeve of matched fracturing sliding bush.
In a preferred embodiment of the invention, as shown in Figure 1, packing element component 14 includes intermediate packing element 14.3, is arranged in
Between 14.3 both ends of packing element end packing element 14.2 and back band 14.1 in each 14.2 outer end of end packing element is set, intermediate packing element 14.3
It is connect between the packing element 14.2 of end, between end packing element 14.2 and back band 14.1 by inclined-plane.
In a preferred embodiment of the invention, as shown in Figure 1, solvable solution structure is to be pushed away by setting of making of soluble material
Cylinder 12.1, pushing cylinder mechanism 12 further includes being fixedly mounted on the piston 12.2 for setting 12.1 upper end of pushing cylinder.
In a preferred embodiment of the invention, as shown in Figure 1, by being articulated and connected between upper anchor fluke 20 and lower anchor fluke 3,
It is equipped with retaining groove 3.3 between upper and lower anchor fluke, is provided with flat spring 5 in retaining groove 3.3, cover board 4 is installed on flat spring 5, cover board 4
Both ends are mounted on cylindrical body 2.Specifically, two anchor flukes are mounted on by movable ejector pin 7 on cylindrical body respectively, two anchors
The opposite face of pawl is right-angle surface, and to play the role of pinch seal cylinder, the face that two anchor flukes are away from each other is to squeeze contracting inclined-plane.
In a preferred embodiment of the invention, as shown in Figure 1 and Figure 2, the maximum outer profile of lower anchor fluke 3 is located at shoulder block 15.1
Between crowded contracting boss 19.1.
In a preferred embodiment of the invention, as shown in Figure 1, anchoring closing piece mechanism further includes being installed by unlocking pin 6
Unlock thimble 1 in hollow cylindrical body 2 unlocks and is equipped with the first gap 100.1 between thimble 1 and central shaft 9, unlock top
The top that the periphery of needle 1 is located at movable ejector pin 7 is equipped with ejector pin groove 1.1, and one end of movable ejector pin 7 passes through 2 top pressure of cylindrical body
On unlock thimble 1.
In a preferred embodiment of the invention, as shown in Figure 1, being equipped between second between cylindrical body 2 and pushing cylinder mechanism 12
The upper end of gap 100.2, central shaft 9 is equipped with channel 9.2, specifically, the upper port in channel 9.2 is opened in the end face of central shaft 9,
His lower port is opened on the periphery of central shaft 9, is blocked rupture disk 10 and is arranged in channel 9.2, the both ends in channel 9.2 respectively with
First gap 100.1 is connected to the second gap 100.2, and the through-hole 2.2 being connected to the first gap 100.1 is equipped in groove 2.1, is led to
Hole 2.2, the first gap 100.1, channel 9.2 and the second gap 100.2 form the hydraulic cavities 100 being connected to.
As shown in Fig. 3-Fig. 7, a kind of equal latus rectums staged fracturing method includes the following steps：
S1, all fracturing sliding bushs in pit shaft are cleaned；
S2, sliding sleeve opener is pumped at a most upper sliding sleeve for the fracturing sliding bush for waiting for pressure break；
When S3, instantly anchor fluke 3 reach the position of the sealing drum 17 of the sliding sleeve, crowded contracting inclined-plane 3.1 is mutual with sealing drum 17
Under effect so that the protruding latching sealing drum of anchor fluke component 17；
S4, to increasing certain pressure in pit shaft, shear pin 18 is cut, at this point, anchor fluke component drives sealing drum 17 downward
A distance is slided, sliding sleeve is opened；
S5, continue to pressurize, anchor fluke component drives sealing drum 17 to continue the crowded contracting boss 19.1 slided in lower contact
Place, in the case where squeezing contracting inclined-plane 3.1 and squeezing the interaction of contracting boss 19.1, anchor fluke component automatically disengages sealing drum 17 and slides to next
At a sliding sleeve；
S6, step S3 to S5 is repeated, opens all sliding sleeves of the fracturing sliding bush one by one from top to bottom, until opening most next
After a sliding sleeve, sealing drum glide downwards are terminated in together with the sliding sleeve opener at shoulder block 15.1, are continued to pressurizeing in pit shaft,
It breaks up and blocks rupture disk 10 so that the hydraulic cavities 100 of the sliding sleeve opener are got through, and the liquid in pit shaft enters hydraulic cavities, into
Enter the liquid in hydraulic cavities under the action of liquid column hydrostatic pressure, pushes 12 slide downward of pushing cylinder mechanism so that packing element component 14 expands
It opens with seal shaft, the pressure break of the fracturing sliding bush can be carried out after the completion of sealing；
S7, step S2 to S6 is repeated, pressure break is carried out after opening the sliding sleeve of each fracturing sliding bush one by one respectively；
S8, when each fracturing sliding bush complete pressure break after a certain period of time, the solvable solution structure of 12 bottom of pushing cylinder mechanism is in pressure break
Pendular ring slowly dissolves in border, deblocking packing element component 14.
In a preferred embodiment of the invention, as described in Figure 8, this method further includes step：S9, when all sliding sleeves open
The packing element component solution of tool is honored as a queen, and unlocking tool is put into pit shaft, pumps and the sliding sleeve for hitting last input pit shaft opens work
The unlock thimble 1 of tool cuts unlock pin 6 so that unlock 1 slide downward of thimble, until movable ejector pin 7 slides into unlock thimble 1
Ejector pin groove 1.1 in, realize anchor fluke component and sealing drum 17 disengaging, in pit shaft under the action of fluid pressure, unlock work
Tool and a most upper sliding sleeve opener slide downwardly together, hit next sliding sleeve opener successively, realize next cunning
The disengaging of opener anchor fluke component and sealing drum 17 is covered, last unlocking tool slides together with all sliding sleeve openers to well
Bottom.
As shown in Fig. 3-Fig. 8, staged fracturing method in specific application, includes the following steps：
S1, all fracturing sliding bushs in pit shaft are cleaned；
S2, above-mentioned sliding sleeve opener is pumped at a most upper sliding sleeve for the fracturing sliding bush for waiting for pressure break；
S3, when sliding sleeve opener is pumped to corresponding sliding sleeve, lower anchor fluke 3 reaches the position of the sealing drum 17 of the sliding sleeve
It sets, lower anchor fluke 3 is protruding under the elastic force effect of flat spring 5, to lock sealing drum 17；
S4, increase pump displacement, making sliding sleeve opener, pressure difference increase causes 18 quilt of sliding sleeve sealing drum shear pin up and down
It cuts, at this point, the lower anchor fluke 3 of the sliding sleeve opener drives 17 slide downward a distance of sealing drum, opens sliding sleeve；
S5, continue to pressurize, lower anchor fluke 3 drives sealing drum 17 to continue the crowded contracting boss 19.1 slided in lower contact
Place, in the case where lower anchor fluke 3 squeezes contracting inclined-plane and squeezes the interaction of contracting boss 19.1, lower anchor fluke 3 automatically disengages sealing drum 17 to downslide
At row to next sliding sleeve；
S6, step S3 to S5 is repeated, opens all intermediate sliding sleeves of the fracturing sliding bush one by one from top to bottom, until opening most
After next not-go-end sliding sleeve, sealing drum glide downwards are terminated in together with the sliding sleeve opener at shoulder block, due in lower contact
The position lengthening that can slide of crowded contracting boss and lower anchor fluke, cause its cannot generate interaction force and anchor fluke cannot automatically with
Sealing drum 17 is detached from, and continues, to pressurizeing in pit shaft, to improve discharge capacity in pit shaft, break up and block rupture disk 10 so that the sliding sleeve is opened
The through-hole of tool, the second gap, channel and the first gap form the hydraulic cavities being connected to, and the liquid in pit shaft enters hydraulic cavities,
Into the liquid in hydraulic cavities under the action of liquid column hydrostatic pressure, the drive of piston 12.2 is pushed to set 12.1 slide downward of pushing cylinder,
So that the expansion of packing element component 14 can carry out the pressure break of the fracturing sliding bush with seal shaft after the completion of sealing；
S7, step S2 to S6 is repeated, pressure break is carried out after opening each fracturing sliding bush one by one respectively；
S8, when each fracturing sliding bush complete pressure break reach design time after, set pushing cylinder 12.1 in fracturing fluid environment from
It is dynamic slowly to dissolve, deblocking packing element component 14；
S9, it is honored as a queen when the packing element component solution of all sliding sleeve openers, special unlocking tool is put into pit shaft, pump
And the unlock thimble 1 of the sliding sleeve opener of the last input pit shaft of shock, cut unlock pin 6 so that unlock thimble 1 to downslide
It is dynamic, until movable ejector pin 7 slides into the ejector pin groove 1.1 of unlock thimble 1, the disengaging of lower anchor fluke 3 and sealing drum 17 is realized, in well
Under the action of liquid within the cartridge pressure, sliding sleeve opener is disengaged with not-go-end sliding sleeve and glide downwards to next sliding sleeve opens work
Tool, and unlock thimble is hit therewith, so that all sliding sleeve openers is disengaged with corresponding not-go-end sliding sleeve successively, then the company of can be used
Sliding sleeve opener is all salvaged pit shaft or pushes to shaft bottom by continuous oil pipe.
The present invention may be implemented batch grade open sliding sleeve and ensure that full pit shaft internal diameter is consistent after constructing.
The requirement that the present invention operates wellbore quality and tubing string tripping in is relatively low, and batch grade may be implemented and open, when under
When supreme progress pressure break, sliding sleeve opener compatible with most next fracturing sliding bush is first pumped to the fracturing sliding bush most
At a upper sliding sleeve, because the distance between two anchor fluke of sliding sleeve opener is less than the length of the fracturing sliding bush upper seal cylinder
Degree, so the sliding sleeve opener can be smoothly by the fracturing sliding bush of top, and because of two anchor fluke of sliding sleeve opener
The distance between be slightly larger than the fracturing sliding bush sealing drum length so that the sliding sleeve opener stops at the fracturing sliding bush
A most upper sliding sleeve at, anchor fluke flat spring elastic force effect under pop up around, achieve the purpose that lock sealing drum automatically,
It pressurizes into pit shaft, under the action of pressure difference, shear pin is cut, and anchor fluke component drives sealing drum slide downward, and opening should
The fluid channel of sliding sleeve top connection, under the action of crowded contracting inclined-plane, anchor fluke component and sealing drum are detached from, the sliding sleeve opener to
Under slide onto at next sliding sleeve, open each sliding sleeve successively, until after opening most next sliding sleeve, which connects
It is terminated at lower shoulder block with sealing drum downlink, improves discharge capacity in pit shaft, when well cylinder pressure is increased to design value, block rupture disk
It is breached, the through-hole of cylindrical body is connected to the channel of central shaft, and liquid enters hydraulic cavities, is pushed piston driving to set pushing cylinder and is squeezed
Moulding cartridge module makes packing element component Expansion sealing pit shaft, creates conditions for the pressure break of the fracturing sliding bush, so complete from bottom to up
It after the pressure break of each fracturing sliding bush, sets pushing cylinder and slowly dissolves, packing element component is shunk, and is unsealed, then hit a most upper sliding sleeve
The unlock thimble of opener makes movable ejector pin fall into the ejector pin groove of unlock thimble, and anchor fluke component is disengaged with sealing drum, most
Afterwards under the thrust of well liquid within the cartridge, unlocking tool and a most upper sliding sleeve opener slide downwardly together, hit successively
Hit next sliding sleeve opener, realize the disengaging of next sliding sleeve opener anchor fluke and sealing drum, last unlocking tool with
All sliding sleeve openers are slid together to shaft bottom, and pit shaft restores original size, all sliding sleeve latus rectums it is identical and with it is matched
Casing inner diameter is consistent, ensures follow-up working space.
It should be understood that for those of ordinary skills, it can be modified or changed according to the above description,
And all these modifications and variations should all belong to the protection domain of appended claims of the present invention.
Claims (10)
1. a kind of equal latus rectums segmented fracturing device, which is characterized in that the device includes fracturing sliding bush and for opening the pressure
Split the sliding sleeve opener of all sliding sleeves in sliding sleeve；Wherein,
It is disposed at least one sliding sleeve on the fracturing sliding bush, passes through casing connection, the internal diameter of described sleeve pipe between adjacent sliding sleeve
Equal with the internal diameter of sliding sleeve, the sliding sleeve includes the top connection being tightly connected（15）And lower contact（19）And it is described for sealing
Top connection（15）Upper all fluid channels（15.2）Sealing drum（17）, the sealing drum（17）With top connection（15）Between pass through
Shear pin（18）Connection, the lower contact（19）Interior be equipped with squeezes contracting boss（19.1）, position in the top connection of most next sliding sleeve
In sealing drum（17）With crowded contracting boss（19.1）Between be equipped with shoulder block（15.1）, the length of all sealing drums in the fracturing sliding bush
It is equal；
The sliding sleeve opener includes central shaft（9）, be slidably located in the central shaft respectively（9）Lower part and middle part are expanded
The packing element component opened（14）With pushing cylinder mechanism（12）And axial restraint is sleeved on the anchoring closing piece machine on the central shaft top
Structure, the central shaft（9）Bottom be equipped with positioning shaft shoulder（9.1）, the pushing cylinder mechanism（12）With packing element component（14）It is in contact
Bottom be solvable solution structure, the anchoring closing piece mechanism includes cylindrical body（2）With anchor fluke component, the cylindrical body（2）
It is erected at the central shaft（9）Top, and with the pushing cylinder mechanism（12）Between form hydraulic cavities（100）, the hydraulic cavities
（100）Inside it is provided with closure rupture disk（10）, the hydraulic cavities（100）Lower port on the outside of be provided with sealing element（8）, the upper end
Mouthful be opened in the cylindrical body（2）The groove of periphery（2.1）Connection, multiple anchor fluke components pass through movable ejector pin（7）
Mounted on the groove（2.1）Interior, the anchor fluke component includes upper anchor fluke（20）With lower anchor fluke（3）, the lower anchor fluke（3）It is outer
Side, which is equipped with, squeezes contracting inclined-plane（3.1）It is faced directly with backstop（3.2）, the crowded contracting inclined-plane（3.1）For with the sealing drum（17）Or it squeezes
Contracting boss（19.1）Anchor fluke component is set to occur to squeeze contracting to lock or unclamp the sealing drum after contact（17）, the backstop faces directly
（3.2）For with the shoulder block（15.1）Axial limiting is carried out to entire sliding sleeve opener after contact.
2. equal latus rectums segmented fracturing device according to claim 1, which is characterized in that the device includes multiple fracturing sliding bushs
And multiple sliding sleeve openers with the multiple fracturing sliding bush phase configuration, the sealing drum length of each fracturing sliding bush is from top to bottom
Reduce step by step, every grade of anchor fluke length component is corresponded with sealing drum length, and sliding sleeve opener continues if shorter than sealing drum
Next stage is slided to, until meeting the sliding sleeve interior sealing cylinder of corresponding length.
3. equal latus rectums segmented fracturing device according to claim 1, which is characterized in that the packing element component（14）Including
Intermediate packing element（14.3）, be arranged in the intermediate packing element（14.3）The end packing element at both ends（14.2）And it is arranged in each end packing element
（14.2）The back band of outer end（14.1）, the intermediate packing element（14.3）With end packing element（14.2）Between, the end packing element（14.2）
With back band（14.1）Between connected by inclined-plane.
4. equal latus rectums segmented fracturing device according to claim 1, which is characterized in that the solvable solution structure is by solvable
Property material make set pushing cylinder（12.1）, the pushing cylinder mechanism（12）Further include being fixedly mounted on described to set pushing cylinder（12.1）
The piston of upper end（12.2）.
5. equal latus rectums segmented fracturing device according to claim 1, which is characterized in that the upper anchor fluke and lower anchor fluke（3）
Between by articulated connection, retaining groove is equipped between the upper and lower anchor fluke（3.3）, the retaining groove（3.3）Inside it is provided with flat spring
（5）, the flat spring（5）On cover board is installed（4）, the cover board（4）Both ends be mounted on cylindrical body（2）On.
6. equal latus rectums segmented fracturing device according to claim 1, which is characterized in that the lower anchor fluke（3）Maximum it is outer
Profile is located at the shoulder block（15.1）With crowded contracting boss（19.1）Between.
7. equal latus rectums segmented fracturing device according to claim 1, which is characterized in that the anchoring closing piece mechanism further includes
By unlocking pin（6）Mounted on hollow cylindrical body（2）Interior unlock thimble（1）, the unlock thimble（1）With central shaft
（9）Between be equipped with the first gap（100.1）, the unlock thimble（1）Periphery be located at movable ejector pin（7）Top be equipped with ejector pin
Groove（1.1）, the activity ejector pin（7）One end pass through cylindrical body（2）Top pressure is in unlock thimble（1）On.
8. equal latus rectums segmented fracturing device according to claim 7, which is characterized in that the cylindrical body（2）With pushing cylinder
Mechanism（12）Between be equipped with the second gap（100.2）, the central shaft（9）Upper end be equipped with channel（9.2）, the closure rupture
Disk（10）It is arranged in channel（9.2）It is interior, the channel（9.2）Both ends respectively with the first gap（100.1）With the second gap
（100.2）Connection, the groove（2.1）It is interior to be equipped with and first gap（100.1）The through-hole of connection（2.2）, the through-hole
（2.2）, the first gap（100.1）, channel（9.2）With the second gap（100.2）Form the hydraulic cavities of connection（100）.
9. a kind of equal latus rectums staged fracturing method based on any one of the claim 1-8 equal latus rectums segmented fracturing devices,
It is characterized by comprising the following steps：
S1, all fracturing sliding bushs in pit shaft are cleaned；
S2, the sliding sleeve opener described in claim 1 is pumped at a most upper sliding sleeve for the fracturing sliding bush for waiting for pressure break；
S3, instantly anchor fluke（3）Reach the sealing drum of the sliding sleeve（17）Position when, on crowded contracting inclined-plane（3.1）With sealing drum（17）
Interaction under, the protruding latching sealing drum of anchor fluke component（17）；
S4, to increasing certain pressure in pit shaft, cut shear pin（18）, at this point, anchor fluke component drives sealing drum（17）Downwards
A distance is slided, sliding sleeve is opened；
S5, continue to pressurize, anchor fluke component drives sealing drum（17）Continue the crowded contracting boss slided in lower contact（19.1）
Place, on crowded contracting inclined-plane（3.1）With crowded contracting boss（19.1）Interaction under, anchor fluke component automatically disengages sealing drum（17）It slides
At to next sliding sleeve；
S6, step S3 to S5 is repeated, opens all sliding sleeves of the fracturing sliding bush one by one from top to bottom, until opening most next cunning
After set, sealing drum glide downwards terminate in shoulder block together with the sliding sleeve opener（15.1）Place, continues, to pressurizeing in pit shaft, to hit
Broken seal blocks up rupture disk（10）So that the hydraulic cavities of the sliding sleeve opener（100）It gets through, the liquid in pit shaft enters hydraulic cavities,
Into the liquid in hydraulic cavities under the action of liquid column hydrostatic pressure, pushing cylinder mechanism is pushed（12）Slide downward so that packing element component
（14）Expansion can carry out the pressure break of the fracturing sliding bush with seal shaft after the completion of sealing；
S7, step S2 to S6 is repeated, pressure break is carried out after opening corresponding each fracturing sliding bush of fractured interval one by one respectively；
S8, when each fracturing sliding bush complete pressure break after a certain period of time, pushing cylinder mechanism（12）The solvable solution structure of bottom is in fracturing fluid
It is slowly dissolved in environment, unseals packing element component（14）.
10. waiting latus rectums staged fracturing method as claimed in claim 9, which is characterized in that further include step：S9, it is somebody's turn to do when all
The packing element component solution of sliding sleeve opener is honored as a queen, and unlocking tool is put into pit shaft, pumps and hit the cunning of last input pit shaft
Cover the unlock thimble of opener（1）, cut unlock pin（6）So that unlock thimble（1）Slide downward, until movable ejector pin
（7）Slide into unlock thimble（1）Ejector pin groove（1.1）It is interior, realize anchor fluke component and sealing drum（17）Disengaging, the liquid in pit shaft
Under the action of body pressure, unlocking tool and a most upper sliding sleeve opener slide downwardly together, hit next sliding sleeve successively
Opener realizes next sliding sleeve opener anchor fluke component and sealing drum（17）Disengaging, last unlocking tool with it is all
Sliding sleeve opener is slid together to shaft bottom.
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| CN106761640B (en) * | 2016-11-17 | 2018-01-23 | 东北石油大学 | Underground full-bore infinite stages sliding pin sliding sleeve switch |
| CN106677737A (en) * | 2017-03-10 | 2017-05-17 | 北京奥赛旗石油科技开发有限公司 | Sealing assembly and sealing equipment |
| EP3662137B1 (en) * | 2017-08-02 | 2023-02-15 | GeoDynamics, Inc. | Opening a casing with a hydraulic-powered setting tool |
| CN112049606B (en) * | 2020-09-30 | 2024-02-06 | 中国石油天然气集团有限公司 | Time-delay opening toe end sliding sleeve and opening method thereof |
| CN113898315B (en) * | 2021-12-08 | 2022-03-01 | 西安维克特睿油气技术有限公司 | Unlimited-level switchable full-bore sliding sleeve assembly |
| CN114517660A (en) * | 2022-02-28 | 2022-05-20 | 哈尔滨艾拓普科技有限公司 | Full-bore infinite staged fracturing sliding sleeve based on intelligent label control and implementation method |
| CN115653541B (en) * | 2022-12-23 | 2023-03-21 | 哈尔滨艾拓普科技有限公司 | Intelligent key label-based segmented multi-cluster fracturing intelligent sliding sleeve system and method |
| CN116084905B (en) * | 2023-03-13 | 2023-07-18 | 大庆市璞庆钻采设备制造有限公司 | Sand blaster for oilfield stratum fracturing |
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| CN202125289U (en) * | 2011-06-22 | 2012-01-25 | 中国石油化工股份有限公司 | Sliding sleeve assembly of selective switch |
| CN103032058A (en) * | 2011-10-03 | 2013-04-10 | 克拉玛依特隆油田技术服务有限责任公司 | Horizontal multi-stage fracturing sliding sleeve of an oil field and opening tool |
| CN202431261U (en) * | 2011-10-03 | 2012-09-12 | 克拉玛依特隆油田技术服务有限责任公司 | Oil field horizontal well multi-section press cracking slide sleeve and opening tool |
| CN103132969B (en) * | 2011-12-05 | 2016-01-06 | 中国石油化工股份有限公司 | Oil well staged fracturing sliding sleeve and device thereof and using method |
| US8459365B1 (en) * | 2012-08-21 | 2013-06-11 | Thru Tubing Solutions, Inc. | Apparatus for creating bidirectional rotary force or motion in a downhole device and method for using same |
| CN204225847U (en) * | 2014-10-28 | 2015-03-25 | 中国石油集团西部钻探工程有限公司 | Well cementation sliding sleeve |
| CN104895529A (en) * | 2015-06-09 | 2015-09-09 | 中国石油集团渤海钻探工程有限公司 | Underseal opening type full-bore cementing sliding sleeve |
| CN205189848U (en) * | 2015-06-10 | 2016-04-27 | 北京日升恒诚能源技术开发有限公司 | Discodactylous that breaks end well cementation fracturing sliding sleeve |
| CN105401917B (en) * | 2015-10-26 | 2017-08-15 | 东北石油大学 | Full-bore infinite stages protruding shaft switching regulator fracturing sliding bush |
| CN205778794U (en) * | 2016-05-20 | 2016-12-07 | 中石化石油工程技术服务有限公司 | The latus rectum segmented fracturing devices such as one |
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