CN205778794U - The latus rectum segmented fracturing devices such as one - Google Patents
The latus rectum segmented fracturing devices such as one Download PDFInfo
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- CN205778794U CN205778794U CN201620470060.4U CN201620470060U CN205778794U CN 205778794 U CN205778794 U CN 205778794U CN 201620470060 U CN201620470060 U CN 201620470060U CN 205778794 U CN205778794 U CN 205778794U
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- 210000000078 claw Anatomy 0.000 claims description 17
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- 238000004873 anchoring Methods 0.000 claims description 11
- 230000000903 blocking effect Effects 0.000 claims description 9
- 239000012530 fluid Substances 0.000 claims description 9
- 238000010008 shearing Methods 0.000 claims description 7
- 241000242541 Trematoda Species 0.000 claims description 5
- 230000000694 effects Effects 0.000 claims description 5
- 239000000463 material Substances 0.000 claims description 2
- 239000007788 liquid Substances 0.000 abstract description 11
- 238000010276 construction Methods 0.000 abstract description 6
- 238000012856 packing Methods 0.000 abstract description 6
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- 235000017166 Bambusa arundinacea Nutrition 0.000 description 7
- 235000017491 Bambusa tulda Nutrition 0.000 description 7
- 241001330002 Bambuseae Species 0.000 description 7
- 235000015334 Phyllostachys viridis Nutrition 0.000 description 7
- 239000011425 bamboo Substances 0.000 description 7
- 230000009466 transformation Effects 0.000 description 6
- 238000005516 engineering process Methods 0.000 description 4
- 230000003993 interaction Effects 0.000 description 4
- 238000005086 pumping Methods 0.000 description 4
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- 238000004140 cleaning Methods 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
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- 230000000712 assembly Effects 0.000 description 1
- 238000000429 assembly Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 230000003116 impacting effect Effects 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
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- 239000002195 soluble material Substances 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
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Abstract
nullThe utility model discloses the latus rectum segmented fracturing devices such as one，Including fracturing sliding bush and sliding sleeve opener，In sliding sleeve, sealing drum length reduces the most step by step，Every grade of anchor fluke length component and sealing drum length one_to_one corresponding，If being shorter than sealing drum, sliding sleeve opener continues to slide to next stage，Until meeting the sealing drum of corresponding length，By opener pump to most going up a sliding sleeve，Anchor fluke assembly locking sealing drum，Shear pin is cut off in pressurization，Anchor fluke drives sealing drum to glide，Open sliding sleeve，Anchor fluke assembly departs from sealing drum disengaging because squeezing contracting inclined-plane，This opener slides onto at next sliding sleeve，Until after opening the most next sliding sleeve，This opener terminates at shoulder block together with sealing drum is descending，Improve discharge capacity in cylinder，Break up closure rupture disk，Liquid enters hydraulic cavities，Packing element assembly seal shaft，After pressure break completes，Set pushing cylinder to dissolve，Packing element assembly unseals.This utility model can realize batch level open sliding sleeve and construction terminate after ensure that full pit shaft internal diameter is consistent.
Description
Technical Field
The utility model particularly relates to a latus rectum staged fracturing device.
Background
At present, two modes of casing cementing and multistage open hole packer and sliding sleeve are mainly adopted for completion of shale gas horizontal wells.
The well completion mode of the multistage open hole packer and the pitching graded sliding sleeve can save casing well cementation cost, and the reservoir transformation construction speed is high, but on one hand, the well completion mode limits the scale of reservoir transformation due to limited stage number of segmentation and limited drift diameter of toe well section; on the other hand, when the sliding sleeve fails and cannot be opened, only the corresponding well section can be abandoned, and the space of the shaft left after operation and construction is limited, so that subsequent measures cannot be taken basically; meanwhile, the sealing effect of each stage of packer is difficult to detect, so that the long-term sealing property cannot be ensured.
For casing well cementation and completion, a pumping bridge plug and perforation combined technology can be adopted for segmented reservoir transformation, the number of segmented stages is not limited, large-scale fracturing transformation can be realized, a complete casing well bore space can be left after operation, follow-up measure operation is convenient to take, but the construction speed is low and the operation period is long; the casing packer and the sliding sleeve pipe column can be put into the casing packer after perforation to be subjected to segmented transformation, but the segmented progression and the transformation scale are small, and the operation pipe column is difficult to pull out when a sand fracturing mode is adopted.
Aiming at the defects of the two well completion modes, in recent years, a casing sliding sleeve staged fracturing technology is applied abroad on a large scale, a unit introduces and applies a TAP (test access port) and other stepless sliding sleeve technologies and carries out domestic research, and a unit researches a pitching type casing sliding sleeve and an intelligent sliding sleeve technology, but the graded sliding sleeves cannot simultaneously guarantee the full shaft and other drift diameters and the batch-level opening sliding sleeve to fracture.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a latus rectum staged fracturing device, it can realize in the same fracturing sliding sleeve that the wholesale level of all sliding sleeves is opened, and guarantee after the construction that the whole well bore internal diameter is unanimous.
The utility model provides a technical scheme that its technical problem adopted is:
the staged fracturing device with the same drift diameter comprises a fracturing sliding sleeve and a sliding sleeve opening tool for opening all sliding sleeves in the fracturing sliding sleeve; wherein,
the fracturing sliding sleeve is characterized in that at least one sliding sleeve is arranged on the fracturing sliding sleeve, adjacent sliding sleeves are connected through a sleeve, the inner diameter of the sleeve is equal to that of the sliding sleeve, the sliding sleeve comprises an upper joint and a lower joint which are connected in a sealing mode and a sealing barrel which is used for sealing all fluid channels on the upper joint, the sealing barrel is connected with the upper joint through a shearing pin, a squeezing boss is arranged in the lower joint, a blocking shoulder is arranged between the sealing barrel and the squeezing boss in the upper joint of the lowest sliding sleeve, and the lengths of all the sealing barrels in the fracturing sliding sleeve are equal;
the sliding sleeve opening tool comprises a central shaft, an expandable rubber sleeve mechanism and a push sleeve mechanism which are respectively sleeved on the lower part and the middle part of the central shaft in a sliding way, and an anchoring locking block mechanism which is axially fixed and sleeved on the upper part of the central shaft, wherein a positioning shaft shoulder is arranged at the bottom of the central shaft, the bottom of the push sleeve mechanism, which is contacted with the rubber sleeve mechanism, is of a soluble structure, the anchoring locking block mechanism comprises a cylindrical body and a fluke component, the cylindrical body is erected at the top of the central shaft, a hydraulic cavity is formed between the cylindrical body and the push sleeve mechanism, a blocking rupture disc is arranged in the hydraulic cavity, a sealing element is arranged outside the lower port of the hydraulic cavity, the upper port of the sealing element is communicated with a groove arranged on the periphery of the cylindrical body, a plurality of fluke components are arranged in the groove through a movable ejector pin, each fluke component comprises an upper fluke and a lower fluke, the squeezing inclined plane is used for squeezing and shrinking the fluke assembly to lock or loosen the sealing cylinder after being contacted with the sealing cylinder or the squeezing boss, and the stopping straight plane is used for axially limiting the whole sliding sleeve opening tool after being contacted with the stopping shoulder.
According to the technical scheme, the device comprises a plurality of fracturing sliding sleeves and a plurality of sliding sleeve opening tools which are configured with the plurality of fracturing sliding sleeves, the length of a sealing barrel of each fracturing sliding sleeve is reduced step by step from top to bottom, the length of each stage of fluke component corresponds to the length of the sealing barrel one by one, and if the length of each stage of fluke component is shorter than that of the sealing barrel, the sliding sleeve opening tools continue to slide to the next stage until the sliding sleeve inner sealing barrel with the corresponding length is met.
According to the technical scheme, the rubber sleeve mechanism comprises a middle rubber sleeve, end rubber sleeves arranged at two ends of the middle rubber sleeve and a back ring arranged at the outer end of each end rubber sleeve, and the middle rubber sleeve and the end rubber sleeves and the back rings are connected through inclined planes.
According to the technical scheme, the soluble structure is a setting push cylinder made of soluble materials, and the push cylinder mechanism further comprises a piston fixedly mounted at the upper end of the setting push cylinder.
According to the technical scheme, the upper anchor claw and the lower anchor claw are connected in a hinged mode, a blocking groove is formed between the upper anchor claw and the lower anchor claw, a plate spring is arranged in the blocking groove, a cover plate is installed on the plate spring, and two ends of the cover plate are installed on the cylindrical body.
According to the technical scheme, the thickness of the lower anchor fluke is smaller than the distance between the retaining shoulder and the compression boss.
According to the technical scheme, the anchoring locking block mechanism further comprises an unlocking ejector pin arranged in the hollow cylindrical body through an unlocking pin, a first gap is formed between the unlocking ejector pin and the central shaft, an ejector pin groove is formed in the periphery of the unlocking ejector pin and located above the movable ejector pin, and one end of the movable ejector pin penetrates through the cylindrical body and is pressed on the unlocking ejector pin.
According to the technical scheme, a second gap is formed between the cylindrical body and the cylinder pushing mechanism, a channel is arranged at the upper end of the central shaft, the blocking rupture disc is arranged in the channel, two ends of the channel are respectively communicated with the first gap and the second gap, a through hole communicated with the first gap is formed in the groove, and the through hole, the first gap, the channel and the second gap form a communicated hydraulic cavity.
The utility model discloses the beneficial effect who produces is: the utility model has relatively low requirements on the well body quality and the running operation of a pipe column, can realize batch-level opening, when a certain fracturing sliding sleeve needs to be fractured, the sliding sleeve opening tool is pumped to the uppermost sliding sleeve position of the fracturing sliding sleeve, the fluke component is popped out all around to achieve the purpose of automatically locking the sealing cylinder, the pressure is applied to the shaft, under the action of pressure difference, the shearing pin is cut off, the fluke drives the sealing cylinder to slide downwards, the fluid passage of the joint on the sliding sleeve is opened, under the action of the compression inclined plane and the compression boss, the fluke component is separated from the sealing cylinder, the sliding sleeve opening tool slides downwards to the next sliding sleeve position, each sliding sleeve is sequentially opened, until the lowermost sliding sleeve is opened, the sliding sleeve opening tool and the sealing cylinder move downwards to the lower shoulder position, the discharge capacity in the shaft is improved, when the pressure in the shaft rises to the designed value, the plugging rupture disc is broken, hydraulic pressure chamber intercommunication, liquid get into hydraulic pressure chamber, promote the push cylinder mechanism extrusion packing element subassembly, make the sealed pit shaft of packing element subassembly inflation, for the fracturing creation condition of this fracturing sliding sleeve, so follow supreme fracturing of accomplishing each fracturing sliding sleeve from the bottom after, sit and seal the push cylinder and slowly dissolve, the packing element subassembly shrink can the deblocking. The utility model discloses it has the unblock thimble still to design, after all packing element subassemblies deblocking are accomplished, the unblock thimble of a sliding sleeve opening tool above the striking, make activity knock pin fall into in the knock pin recess of unblock thimble, fluke subassembly and sealed section of thick bamboo throw off, at last under the thrust action of liquid in the pit shaft, unblock tool and the most sliding sleeve opening tool of top slide down together, strike next sliding sleeve opening tool in proper order, realize breaking away from of next sliding sleeve opening tool fluke subassembly and sealed section of thick bamboo, last unblock tool and all sliding sleeve opening tools slide to the shaft bottom together, the pit shaft resumes original size, all sliding sleeve latus rectum are the same and unanimous with matched with sleeve pipe internal diameter, guarantee follow-up measure operation space.
Drawings
The invention will be further explained with reference to the drawings and examples, wherein:
fig. 1 is a schematic structural view of a sliding sleeve opening tool in an embodiment of the present invention;
fig. 2 is a schematic structural view of the sliding sleeve in the embodiment of the present invention;
FIG. 3 is a schematic view of the sliding sleeve opening tool as it passes through a sliding sleeve assembly that is not intended to be opened;
FIG. 4 is a schematic view of the condition of the slide opening tool reaching and anchoring the uppermost slide of a designated slide assembly to be opened;
FIG. 5 is a schematic view showing a state in which the sliding sleeve opening tool shears the shear pin to open the sliding sleeve and prepares for automatic unlocking to go down;
FIG. 6 is a schematic view of the state of the slide opening tool when it reaches the anchoring position and opens the lowermost slide of the specified slide assembly to be opened;
FIG. 7 is a schematic view of the rubber sleeve assembly expanding the sealing sleeve when the plugging rupture disk of the sliding-sleeve opener is broken;
fig. 8 is a schematic view of the sliding sleeve opener descending after the pushing mechanism dissolves and unseals the rubber sleeve assembly.
In the figure: 1-unlocking thimble, 1.1-thimble groove, 2-cylinder body, 2.1-groove, 2.2-through hole, 3-anchor jaw, 3.1-compression inclined plane, 3.2-stopping straight plane, 3.3-baffle groove, 4-cover plate, 5-plate spring, 6-unlocking pin, 7-movable thimble, 8-sealing element, 9-central shaft, 9.1-positioning shaft shoulder, 9.2-channel, 10-blocking rupture disk, 11-piston, 12-pushing cylinder mechanism, 12.1-sitting sealing pushing cylinder, 12.2-piston, 14-rubber cylinder component, 14.1-back ring, 14.2-end rubber cylinder, 14.3-middle rubber cylinder, 15-upper joint, 15.1-stopping shoulder, 15.2-fluid channel, 17-sealing cylinder, 18-shearing pin, 19-lower joint, fluid channel, and the like, 19.1-squeezing boss, 20-upper fluke, 100-hydraulic cavity, 100.1-first gap and 100.2-second gap.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the invention.
The staged fracturing device comprises a fracturing sliding sleeve and a sliding sleeve opening tool for opening all sliding sleeves in the fracturing sliding sleeve; wherein,
as shown in fig. 2, at least one sliding sleeve is arranged on the fracturing sliding sleeve, adjacent sliding sleeves are connected through a sleeve, the inner diameter of the sleeve is equal to that of the sliding sleeve, the sliding sleeve comprises an upper joint 15 and a lower joint 19 which are connected in a sealing manner, and a sealing barrel 17 which is used for sealing all fluid passages 15.2 on the upper joint 15, the sealing barrel 17 is connected with the upper joint 15 through a shearing pin 18, a compression boss 19.1 is arranged in the lower joint 19, a blocking shoulder 15.1 is arranged between the sealing barrel 17 and the compression boss 19.1 in the upper joint of the lowest sliding sleeve, the lengths of all sealing barrels in the fracturing sliding sleeve are equal, wherein the sealing barrel 17 is connected with the upper joint in a sealing manner through a sealing ring arranged in four O-ring grooves on the sealing barrel, and the compression boss 19.1 has a larger chamfer angle;
as shown in fig. 1, the sliding sleeve opener comprises a central shaft 9, an expandable rubber sleeve mechanism 14 and a push sleeve mechanism 12 which are respectively sleeved on the lower part and the middle part of the central shaft 9 in a sliding manner, and an anchoring locking block mechanism which is axially fixed on the upper part of the central shaft 9 and sleeved on the central shaft 9, wherein a positioning shaft shoulder 9.1 is arranged at the bottom of the central shaft 9 and used for limiting the rubber sleeve mechanism, the bottom of the push sleeve mechanism 12, which is in contact with the rubber sleeve mechanism 14, is of a soluble structure, the anchoring locking block mechanism comprises a cylindrical body 2 and fluke components, the cylindrical body 2 is erected on the top of the central shaft 9, a hydraulic cavity 100 is formed between the cylindrical body and the push sleeve mechanism 12, a plugging rupture disc 10 is arranged in the hydraulic cavity 100, a sealing element 8 is arranged outside a lower port of the hydraulic cavity 100, the sealing element 8 is specifically a piston cylinder, an upper port of the sealing element is communicated with, the fluke component comprises an upper fluke 20 and a lower fluke 3, wherein the outer side of the lower fluke 3 is provided with a squeezing inclined plane 3.1 and a stopping straight surface 3.2, the squeezing inclined plane 3.1 is used for squeezing and contracting the fluke component to lock or loosen the sealing cylinder 17 after being contacted with the sealing cylinder 17 or the squeezing boss 19.1, and the stopping straight surface 3.2 is used for axially limiting the whole sliding sleeve opening tool after being contacted with the shoulder 15.1.
The utility model discloses a preferred embodiment, the device include a plurality of fracturing sliding sleeves and with a plurality of sliding sleeve opening tool that a plurality of fracturing sliding sleeves disposed mutually, the sealed section of thick bamboo length from the top down of each fracturing sliding sleeve reduces step by step, every grade of fluke subassembly length and sealed section of thick bamboo length one-to-one, if the shortages in sealed section of thick bamboo then sliding sleeve opening tool continues to slide to one-level down, until meeting the sliding sleeve internal seal section of thick bamboo that corresponds length. That is to say, the sliding sleeve opening tool is the one-to-one relation with the fracturing sliding sleeve, and the distance between two flukes of every sliding sleeve opening tool is different, and is the decreasing relation from top to bottom, and the length of the sealed cylinder in the last fracturing sliding sleeve is greater than the length of the sealed cylinder in the next fracturing sliding sleeve adjacent to it, and is greater than the distance between the upper fluke and the lower fluke of the sliding sleeve opening tool that disposes with this next fracturing sliding sleeve, when throwing the sliding sleeve opening tool into the pit shaft, every sliding sleeve opening tool can only open the sliding sleeve of the fracturing sliding sleeve that suits with it.
In the preferred embodiment of the present invention, as shown in fig. 1, the glue cylinder mechanism 14 includes a middle glue cylinder 14.3, end glue cylinders 14.2 disposed at two ends of the middle glue cylinder 14.3, and a back ring 14.1 disposed at the outer end of each end glue cylinder 14.2, and the middle glue cylinder 14.3 is connected to the end glue cylinder 14.2 and the end glue cylinder 14.2 are connected to the back ring 14.1 through inclined planes.
In the preferred embodiment of the present invention, as shown in fig. 1, the dissolvable structure is a setting pusher 12.1 made of dissolvable material, and the pusher mechanism 12 further includes a piston 12.2 fixedly mounted on the upper end of the setting pusher 12.1.
In the preferred embodiment of the present invention, as shown in fig. 1, the upper anchor claw 20 and the lower anchor claw 3 are connected by hinge, a retaining groove 3.3 is provided between the upper anchor claw and the lower anchor claw, a plate spring 5 is provided in the retaining groove 3.3, a cover plate 4 is installed on the plate spring 5, and both ends of the cover plate 4 are installed on the cylindrical body 2. Specifically, two flukes are installed on the tube-shape body through activity knock pin 7 respectively, and the face that two flukes are relative is the right angle face to play the effect of pressing from both sides tight sealed section of thick bamboo, the face that two flukes deviate from mutually is the crowded inclined plane that contracts.
In the preferred embodiment of the present invention, as shown in fig. 1 and 2, the thickness of the lower anchor 3 is smaller than the distance between the retaining shoulder 15.1 and the pinching boss 1901.
In the preferred embodiment of the present invention, as shown in fig. 1, the anchoring lock block mechanism further includes an unlocking thimble 1 installed in the hollow tubular body 2 through an unlocking pin 6, a first gap 100.1 is provided between the unlocking thimble 1 and the central shaft 9, a thimble groove 1.1 is provided above the movable thimble 7 in the periphery of the unlocking thimble 1, and one end of the movable thimble 7 passes through the tubular body 2 and presses against the unlocking thimble 1.
In the preferred embodiment of the present invention, as shown in fig. 1, a second gap 100.2 is provided between the tubular body 2 and the pushing cylinder mechanism 12, a channel 9.2 is provided at the upper end of the central shaft 9, specifically, the upper port of the channel 9.2 is provided at the end surface of the central shaft 9, other lower ports are provided at the periphery of the central shaft 9, the plugging rupture disk 10 is provided in the channel 9.2, both ends of the channel 9.2 are respectively communicated with the first gap 100.1 and the second gap 100.2, a through hole 2.2 communicated with the first gap 100.1 is provided in the groove 2.1, and the through hole 2.2, the first gap 100.1, the channel 9.2 and the second gap 100.2 form a communicated hydraulic chamber 100.
As shown in fig. 3-7, an equal-path staged fracturing method includes the following steps:
s1, cleaning all fracturing sliding sleeves in the shaft;
s2, pumping the sliding sleeve opening tool to the uppermost sliding sleeve of the fracturing sliding sleeve to be fractured;
s3, when the lower fluke 3 reaches the position of the sealing cylinder 17 of the sliding sleeve, the fluke assembly extends outwards to lock the sealing cylinder 17 under the interaction of the compression inclined plane 3.1 and the sealing cylinder 17;
s4, adding a certain pressure in the shaft, shearing the shear pin 18, driving the sealing cylinder 17 to slide downwards for a certain distance by the fluke assembly, and opening the sliding sleeve;
s5, continuously pressurizing, driving the sealing cylinder 17 to continuously slide to the squeezing boss 19.1 in the lower joint by the fluke component, and automatically separating the fluke component from the sealing cylinder 17 to slide to the next sliding sleeve under the interaction of the squeezing inclined plane 3.1 and the squeezing boss 19.1;
s6, repeating the steps S3 to S5, opening all sliding sleeves of the fracturing sliding sleeves one by one from top to bottom until the lowest sliding sleeve is opened, sliding the sealing cylinder downwards to stop at the position of the stop shoulder 15.1 together with the sliding sleeve opening tool, continuing to pressurize the shaft, breaking the plugging rupture disc 10, opening the hydraulic cavity 100 of the sliding sleeve opening tool, allowing liquid in the shaft to enter the hydraulic cavity, allowing the liquid entering the hydraulic cavity to push the cylinder pushing mechanism 12 to slide downwards under the action of the pressure of the stationary night column, allowing the rubber cylinder assembly 14 to expand to seal the shaft, and fracturing the fracturing sliding sleeves after sealing is completed;
s7, repeating the steps S2 to S6, and fracturing after respectively opening the sliding sleeves of the fracturing sliding sleeves one by one;
s8, after each fracturing sliding sleeve completes fracturing for a certain time, the dissolvable structure at the bottom of the pushing cylinder mechanism 12 slowly dissolves in a fracturing fluid environment, and the rubber cylinder assembly 14 is unsealed.
In a preferred embodiment of the present invention, as illustrated in fig. 8, the method further comprises the steps of: s9, after the rubber sleeve assemblies of all the sliding sleeve opening tools are unsealed, an unlocking tool is put into the shaft, the unlocking thimble 1 of the sliding sleeve opening tool which is put into the shaft finally is pumped and impacted, the unlocking pin 6 is cut off, the unlocking thimble 1 slides downwards until the movable thimble 7 slides into the thimble groove 1.1 of the unlocking thimble 1, the anchor fluke assembly is separated from the sealing cylinder 17, the unlocking tool and the uppermost sliding sleeve opening tool slide downwards together under the action of the liquid pressure in the shaft, the next sliding sleeve opening tool is impacted in sequence, the anchor fluke assembly of the next sliding sleeve opening tool is separated from the sealing cylinder 17, and finally the unlocking tool and all the sliding sleeve opening tools slide to the bottom of the shaft together.
As shown in fig. 3 to 8, the staged fracturing method, when applied, includes the following steps:
s1, cleaning all fracturing sliding sleeves in the shaft;
s2, pumping the sliding sleeve opening tool to the uppermost sliding sleeve of the fracturing sliding sleeve to be fractured;
s3, when the sliding sleeve opening tool is pumped to the corresponding sliding sleeve, the lower anchor claw 3 reaches the position of the sealing cylinder 17 of the sliding sleeve, and the lower anchor claw 3 extends outwards under the elastic force of the plate spring 5 to lock the sealing cylinder 17;
s4, increasing pumping displacement to increase the pressure difference between the upper part and the lower part of the sliding sleeve opening tool so as to cut the sliding sleeve sealing cylinder cutting pin 18, and at the moment, the lower anchor fluke 3 of the sliding sleeve opening tool drives the sealing cylinder 17 to slide downwards for a certain distance to open the sliding sleeve;
s5, continuously pressurizing, driving the sealing cylinder 17 to continuously slide to the position of the compression boss 19.1 in the lower joint by the lower fluke 3, and automatically separating the lower fluke 3 from the sealing cylinder 17 to slide downwards to the next sliding sleeve under the interaction of the compression inclined plane of the lower fluke 3 and the compression boss 19.1;
s6, repeating the steps S3 to S5, opening all the middle sliding sleeves of the fracturing sliding sleeves one by one from top to bottom until the lowest stopping end sliding sleeve is opened, sliding the sealing cylinder downwards to stop at the stopping shoulder together with the sliding sleeve opening tool, because the sliding position of the squeezing boss in the lower joint and the lower fluke is lengthened, the squeezing boss can not generate interaction force and the fluke can not automatically separate from the sealing cylinder 17, the pressure in the shaft is continuously applied, the discharge capacity in the shaft is improved, the plugging rupture disk 10 is broken, so that the through hole, the second gap, the channel and the first gap of the sliding sleeve opening tool form a communicated hydraulic cavity, liquid in the shaft enters the hydraulic cavity, the liquid entering the hydraulic cavity pushes the piston 12.2 to drive the setting push cylinder 12.1 to slide downwards under the action of the pressure of the static night pillar, so that the rubber sleeve component 14 is expanded to seal the shaft, and the fracturing of the fracturing sliding sleeve can be carried out after the sealing is finished;
s7, repeating the steps S2 to S6, and fracturing after respectively opening the fracturing sliding sleeves one by one;
s8, when the fracturing of each fracturing sliding sleeve is completed and the design time is reached, the setting sliding sleeve 12.1 automatically and slowly dissolves in the fracturing fluid environment, and the rubber sleeve component 14 is unsealed;
s9, after the rubber sleeve components of all the sliding sleeve opening tools are unsealed, a special unlocking tool is put into the shaft, the unlocking thimble 1 of the sliding sleeve opening tool which is finally put into the shaft is pumped and impacted, the unlocking pin 6 is cut off, the unlocking thimble 1 slides downwards until the movable thimble 7 slides into the thimble groove 1.1 of the unlocking thimble 1, the lower anchor claw 3 is separated from the sealing cylinder 17, under the action of the liquid pressure in the shaft, the sliding sleeve opening tool is separated from the end-stop sliding sleeve and slides downwards to the next sliding sleeve opening tool and impacts with the unlocking thimble, all the sliding sleeve opening tools are separated from the corresponding end-stop sliding sleeves in sequence, and then the sliding sleeve opening tools can be completely fished out of the shaft or pushed to the bottom of the shaft by adopting a continuous oil pipe.
The utility model discloses can realize criticizing the level and open the sliding sleeve, and guarantee that the whole well bore internal diameter is unanimous after the construction.
The utility model has relatively low requirements on the well body quality and the running operation of the pipe column, batch opening can be realized, when fracturing is carried out from bottom to top, the sliding sleeve opening tool matched with the lowest fracturing sliding sleeve is pumped to the uppermost sliding sleeve of the fracturing sliding sleeve, because the distance between the two anchor claws of the sliding sleeve opening tool is less than the length of the sealing barrel above the fracturing sliding sleeve, the sliding sleeve opening tool can smoothly pass through the fracturing sliding sleeve above, and because the distance between the two anchor claws of the sliding sleeve opening tool is slightly more than the length of the sealing barrel of the fracturing sliding sleeve, the sliding sleeve opening tool is stopped at the uppermost sliding sleeve of the fracturing sliding sleeve, the anchor claws are popped out all around under the elastic action of the plate spring, the aim of automatically locking the sealing barrel is achieved, pressurization is carried out to the shaft, under the action of pressure difference, the shearing pin is cut off, the anchor claw component drives the sealing barrel to slide downwards, opening a fluid passage of an upper joint of the sliding sleeve, separating the anchor claw assembly from the sealing cylinder under the action of a squeezing inclined plane, moving the sliding sleeve opening tool downwards to the next sliding sleeve, sequentially opening each sliding sleeve until the lowest sliding sleeve is opened, then moving the sliding sleeve opening tool and the sealing cylinder downwards to stop at a lower stop shoulder, increasing the discharge capacity in a shaft, breaking a blocking rupture disk when the pressure in the shaft rises to a designed value, enabling a through hole of the cylindrical body to be communicated with a passage of a central shaft, enabling liquid to enter a hydraulic cavity, pushing a piston to drive a sitting sealing push cylinder to extrude the rubber cylinder assembly, enabling the rubber cylinder assembly to expand to seal the shaft, creating conditions for fracturing of the fracturing sliding sleeve, and thus after fracturing of each fracturing sliding sleeve is completed from bottom to top, slowly dissolving the sitting sealing push cylinder, enabling the rubber cylinder assembly to be unsealed, then impacting an unlocking thimble of the uppermost sliding sleeve opening tool, enabling a movable thimble to fall into a thimble groove of the unlocking thimble, the fluke assembly is separated from the sealing barrel, finally, under the thrust action of liquid in the shaft, the unlocking tool and the uppermost sliding sleeve opening tool slide downwards together to sequentially impact the next sliding sleeve opening tool, so that the fluke of the next sliding sleeve opening tool is separated from the sealing barrel, finally, the unlocking tool and all sliding sleeve opening tools slide to the bottom of the shaft together, the shaft recovers the original size, the drift diameters of all sliding sleeves are the same and are consistent with the inner diameter of a matched sleeve, and the working space of follow-up measures is ensured.
It will be understood that modifications and variations can be made by persons skilled in the art in light of the above teachings and all such modifications and variations are considered to be within the scope of the invention as defined by the following claims.
Claims (8)
1. The equal-drift-diameter segmented fracturing device is characterized by comprising a fracturing sliding sleeve and a sliding sleeve opening tool for opening all sliding sleeves in the fracturing sliding sleeve; wherein,
the fracturing sliding sleeve is characterized in that at least one sliding sleeve is arranged on the fracturing sliding sleeve, adjacent sliding sleeves are connected through a sleeve, the inner diameter of the sleeve is equal to that of the sliding sleeve, the sliding sleeve comprises an upper connector (15) and a lower connector (19) which are connected in a sealing mode and a sealing barrel (17) which is used for sealing all fluid channels (15.2) on the upper connector (15), the sealing barrel (17) is connected with the upper connector (15) through a shearing pin (18), a squeezing boss (19.1) is arranged in the lower connector (19), a blocking shoulder (15.1) is arranged between the sealing barrel (17) and the squeezing boss (19.1) in the upper connector of the lowest sliding sleeve, and the lengths of all the sealing barrels in the fracturing sliding sleeve are equal;
the sliding sleeve opening tool comprises a central shaft (9), an expandable rubber sleeve mechanism (14) and a push sleeve mechanism (12) which are respectively sleeved with the lower part and the middle part of the central shaft (9) in a sliding manner, and an anchoring lock block mechanism which is sleeved on the upper part of the central shaft in an axial fixing manner, wherein a positioning shaft shoulder (9.1) is arranged at the bottom of the central shaft (9), the bottom of the push sleeve mechanism (12) which is contacted with the rubber sleeve mechanism (14) is of a soluble structure, the anchoring lock block mechanism comprises a cylindrical body (2) and an anchor claw component, the cylindrical body (2) is erected at the top of the central shaft (9), a hydraulic cavity (100) is formed between the cylindrical body and the push sleeve mechanism (12), a blocking rupture disc (10) is arranged in the hydraulic cavity (100), a sealing element (8) is arranged on the outer side of a lower port of the hydraulic cavity (100), and the upper port of the sliding sleeve opening tool is communicated with, a plurality of the fluke subassembly is installed through activity knock pin (7) in recess (2.1), the fluke subassembly includes fluke (20) and lower fluke (3), the outside of fluke (3) is equipped with crowded inclined plane (3.1) and backstop straight face (3.2) that contracts down, crowded inclined plane (3.1) that contracts be used for with sealed cylinder (17) or crowded boss (19.1) contact back make the fluke subassembly take place to crowd and contract in order to lock or loosen sealed cylinder (17), backstop straight face (3.2) be used for with keep off and carry out axial spacing to whole sliding sleeve opening tool after shoulder (15.1) contact.
2. The device of claim 1, wherein the device comprises a plurality of fracturing sliding sleeves and a plurality of sliding sleeve opening tools which are configured with the plurality of fracturing sliding sleeves, the length of the sealing barrel of each fracturing sliding sleeve is gradually reduced from top to bottom, the length of each stage of fluke assembly corresponds to the length of the sealing barrel one by one, and if the length of each stage of fluke assembly is shorter than the length of the sealing barrel, the sliding sleeve opening tools continue to slide to the next stage until the sliding sleeve inner sealing barrel with the corresponding length is met.
3. The device according to claim 1, characterized in that the glue cylinder mechanism (14) comprises a middle glue cylinder (14.3), end glue cylinders (14.2) arranged at both ends of the middle glue cylinder (14.3) and a back ring (14.1) arranged at the outer end of each end glue cylinder (14.2), and the middle glue cylinder (14.3) and the end glue cylinders (14.2) are connected through an inclined plane and the end glue cylinders (14.2) and the back ring (14.1) are connected through an inclined plane.
4. The device according to claim 1, characterized in that the dissolvable structure is a setting pusher (12.1) made of a dissolvable material, the pusher mechanism (12) further comprising a piston (12.2) fixedly mounted at the upper end of the setting pusher (12.1).
5. The device according to claim 1, characterized in that the upper fluke and the lower fluke (3) are connected by a hinge, a retaining groove (3.3) is provided between the upper and lower flukes, a plate spring (5) is provided in the retaining groove (3.3), a cover plate (4) is mounted on the plate spring (5), and both ends of the cover plate (4) are mounted on the cylindrical body (2).
6. Device according to claim 1, characterized in that the thickness of the lower fluke (3) is smaller than the distance between the retaining shoulder (15.1) and the pinching projection (19.1).
7. The device according to claim 1, wherein the anchoring lock block mechanism further comprises an unlocking thimble (1) installed in the hollow cylindrical body (2) through an unlocking pin (6), a first gap (100.1) is formed between the unlocking thimble (1) and the central shaft (9), a thimble groove (1.1) is formed in the periphery of the unlocking thimble (1) above the movable thimble (7), and one end of the movable thimble (7) penetrates through the cylindrical body (2) and presses against the unlocking thimble (1).
8. The device according to claim 7, characterized in that a second gap (100.2) is arranged between the cylindrical body (2) and the pusher mechanism (12), a channel (9.2) is arranged at the upper end of the central shaft (9), the plugging rupture disc (10) is arranged in the channel (9.2), two ends of the channel (9.2) are respectively communicated with the first gap (100.1) and the second gap (100.2), a through hole (2.2) communicated with the first gap (100.1) is arranged in the groove (2.1), and the through hole (2.2), the first gap (100.1), the channel (9.2) and the second gap (100.2) form a communicated hydraulic cavity (100).
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| Application Number | Priority Date | Filing Date | Title |
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| CN201620470060.4U CN205778794U (en) | 2016-05-20 | 2016-05-20 | The latus rectum segmented fracturing devices such as one |
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| CN201620470060.4U CN205778794U (en) | 2016-05-20 | 2016-05-20 | The latus rectum segmented fracturing devices such as one |
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| CN205778794U true CN205778794U (en) | 2016-12-07 |
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| CN105822278A (en) * | 2016-05-20 | 2016-08-03 | 中石化石油工程技术服务有限公司 | Equal-drift-diameter staged fracturing device and method |
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| CN114059963A (en) * | 2020-07-31 | 2022-02-18 | 中国石油化工股份有限公司 | Underground pipe column and hydraulic opening tool for opening sliding sleeve switch |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105822278A (en) * | 2016-05-20 | 2016-08-03 | 中石化石油工程技术服务有限公司 | Equal-drift-diameter staged fracturing device and method |
| CN107757925A (en) * | 2017-10-20 | 2018-03-06 | 中国工程物理研究院总体工程研究所 | Parachute compartment separating mechanism |
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| CN114059963A (en) * | 2020-07-31 | 2022-02-18 | 中国石油化工股份有限公司 | Underground pipe column and hydraulic opening tool for opening sliding sleeve switch |
| CN113356849A (en) * | 2021-07-15 | 2021-09-07 | 吕梁学院 | Device for controlling stoping roadway entry based on hydraulic fracturing pressure relief |
| CN113356849B (en) * | 2021-07-15 | 2023-08-15 | 吕梁学院 | Device for controlling stope roadway retention based on hydraulic fracturing pressure relief |
| CN114016948A (en) * | 2022-01-05 | 2022-02-08 | 海塔石油科技有限公司 | Soluble multi-stage separate-layer fracturing packer for oil and gas well and using method thereof |
| CN114016948B (en) * | 2022-01-05 | 2022-03-18 | 海塔石油科技有限公司 | Soluble multi-stage separate-layer fracturing packer for oil and gas well and using method thereof |
| CN114837612A (en) * | 2022-04-22 | 2022-08-02 | 中海油能源发展股份有限公司 | Diameter-variable sliding sleeve opening and closing tool |
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