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CN119062281A - Open hole cluster sliding sleeve fracturing completion device and method - Google Patents

Open hole cluster sliding sleeve fracturing completion device and method Download PDF

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Publication number
CN119062281A
CN119062281A CN202310637012.4A CN202310637012A CN119062281A CN 119062281 A CN119062281 A CN 119062281A CN 202310637012 A CN202310637012 A CN 202310637012A CN 119062281 A CN119062281 A CN 119062281A
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CN
China
Prior art keywords
sliding sleeve
cluster
pressure
fracturing
open hole
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN202310637012.4A
Other languages
Chinese (zh)
Inventor
赵文龙
田志华
韩光耀
谢寿昌
李一强
丁坤
董小卫
赵云峰
王万彬
舒明媚
王飞文
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Petrochina Co Ltd
Original Assignee
Petrochina Co Ltd
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Publication date
Application filed by Petrochina Co Ltd filed Critical Petrochina Co Ltd
Priority to CN202310637012.4A priority Critical patent/CN119062281A/en
Publication of CN119062281A publication Critical patent/CN119062281A/en
Pending legal-status Critical Current

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    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21B—EARTH OR ROCK 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
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21B—EARTH OR ROCK 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
    • E21B33/122—Multiple string packers
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B41/00—Equipment or details not covered by groups E21B15/00 - E21B40/00
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21B—EARTH OR ROCK 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
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00—Energy generation through renewable energy sources
    • Y02E10/10—Geothermal energy

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  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Geology (AREA)
  • Mining & Mineral Resources (AREA)
  • Physics & Mathematics (AREA)
  • Environmental & Geological Engineering (AREA)
  • Fluid Mechanics (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Safety Valves (AREA)

Abstract

The invention provides an open hole cluster type sliding sleeve fracturing completion device and method, which belong to the technical field of oil and gas field development, and comprise an isolator, a differential pressure sliding sleeve, a first pressure-holding sliding sleeve, an open hole packer, a sleeve and a multi-cluster sliding sleeve structure, wherein the inner diameters of the multi-cluster sliding sleeve structure are sequentially increased from bottom to top, each multi-cluster sliding sleeve structure comprises a second pressure-holding sliding sleeve and a multi-cluster sliding sleeve, the inner diameters of the second pressure-holding sliding sleeve and the multi-cluster sliding sleeve in each multi-cluster sliding sleeve structure are the same, the limit of the inner diameter of a shaft on the number of the sliding sleeves is reduced, the number of the sliding sleeves is increased, so that fracturing of a long horizontal section open hole well is realized, a mode that one multi-cluster sliding sleeve structure is opened by one rupture ball is adopted, the multi-cluster sliding sleeve and the rupture channels of the second pressure-holding sliding sleeve in each multi-cluster sliding sleeve structure are simultaneously opened, the displacement requirements on fracturing equipment are reduced, the diameter of a rupture disc is designed based on the orifice plate throttling differential pressure principle, and the fracturing effect of the device is ensured.

Description

Open hole cluster type sliding sleeve fracturing well completion device and method
Technical Field
The invention belongs to the technical field of oil and gas field development, and particularly relates to a device and a method for fracturing and completing a well by using an open hole cluster type sliding sleeve.
Background
Aiming at the tight and stable oil and gas reservoirs with few post-treatment measures, the open hole horizontal well has the advantages of convenient construction, low completion cost, high yield and the like, and the open hole packer and the sliding sleeve partial pressure technology which are developed in a targeted way provide a sharp tool for the fine transformation of the reservoirs for the open hole horizontal well, and the open hole horizontal well has practical requirements and field application in the oilfield field every year. However, as the length of the horizontal section is continuously increased, the original ball-throwing type naked eye partial pressure process has poor adaptability to the long horizontal section naked eye well due to the limitation of the number of segments, specifically, the existing ball-throwing type naked eye partial pressure process adopts a mode of opening a sliding sleeve by one ball, in order to enable the sliding sleeve to be sequentially opened, the inner diameter of the sliding sleeve is larger and larger from bottom to top, but the maximum inner diameter of the sliding sleeve is limited due to the limitation of the inner diameter of a shaft, and the number of the sliding sleeves is limited, so that the maximum adaptation to the length of the horizontal section is shorter, and the exploitation requirement cannot be met.
At present, the prior art is urgently needed to be optimized and improved or new technology is researched and developed to solve the difficult problem and meet the requirement of fine modification of the open hole well with a long horizontal section.
The utility model discloses a cluster type fracturing sliding sleeve in a Chinese patent CN203201542U, which belongs to the field of oil and gas well fracturing matched tools. The fracturing sliding sleeve comprises an upper joint, a lower joint, an outer sliding sleeve and a ball seat, wherein the upper joint and the lower joint are respectively arranged at two ends of the outer sliding sleeve in a threaded mode, the upper joint and the lower joint are respectively positioned with the outer sliding sleeve through a fastening pin A and a fastening pin B, the ball seat is arranged in the outer sliding sleeve between the upper joint and the lower joint through a piston, and the outer sliding sleeve is fixed with the piston through a shearing pin. The utility model can be used for multistage fracturing operation of a horizontal well, and a plurality of cluster sliding sleeves and one ball-throwing fracturing sliding sleeve can be adopted for cooperation in the fracturing operation, so that a foundation is provided for improving the number of stages, increasing the fracturing transformation scale and improving the oil gas yield. The fracturing sliding sleeve solves the problems that the existing fracturing sliding sleeve adopts ball seats and fracturing balls with different specifications to segment, the stratum treatment area and the yield are limited to a certain extent, and the fracturing sliding sleeve is particularly suitable for fracturing construction of oil and gas wells. One section of each cluster sliding sleeve is opened, and meanwhile, a cluster of sliding sleeves are opened, and a cluster fracturing channel is opened, so that liquid is discharged, a certain displacement is required to be increased when the next cluster of sliding sleeves are opened, so that the opening pressure difference of the sliding sleeves is ensured, and the subsequent cluster opening difficulty can occur due to the limitation of ground fracturing equipment, shaft conditions and the like.
The invention discloses a binary ball throwing counting cluster type sliding sleeve in a Chinese patent application CN112709549A, which comprises a cluster assembly and a segmented sliding sleeve which are arranged in a well, wherein the clustered sliding sleeve comprises a clustered body, a first sliding sleeve and a plurality of first rupture discs, the first sliding sleeve is sleeved in the clustered body, a plurality of first mounting holes are formed in the side wall of the clustered body in the radial direction, one first rupture disc is arranged in each first mounting hole, the segmented sliding sleeve comprises a segmented body and a second sliding sleeve, a ball seat and a bearing sliding sleeve which are arranged in the segmented body, the ball seat is positioned between the second sliding sleeve and the bearing sliding sleeve, a plurality of second mounting holes are formed in the side wall of the segmented body in the radial direction, and one second rupture disc is arranged in each second mounting hole. According to the binary ball-throwing counting cluster type sliding sleeve, the lock core assembly and the sliding sleeve clamping position are arranged in the cluster type sliding sleeve, and the binary counting guided by the pressure build-up in the pipe after ball throwing is realized through the cooperation of the clamping groove with the trapezoid gradient and the lock core designed at the arc top end, so that staged fracturing is realized, the design is ingenious, and the operation is simple. The patent cluster structure is a counter structure, the number of balls passing through each cluster of sliding sleeves is solidified according to the designed number of segments and clusters before the pipe column enters the well, and each cluster of sliding sleeves is opened when each cluster of sliding sleeves passes through different numbers of balls, firstly, the structure is complex, the process stability is difficult to ensure, and secondly, once the underground complex condition occurs, when spare balls need to be thrown, the original designed opening sequence of the sliding sleeves can be broken.
Disclosure of Invention
Aiming at the problems in the prior art, the invention provides a device and a method for fracturing and completing a well by using an open hole cluster type sliding sleeve, which aim to solve the technical problems of realizing fracturing of a long horizontal section open hole well and reducing the discharge capacity requirement on fracturing equipment during fracturing.
In order to solve the technical problems, the invention provides an open hole cluster type sliding sleeve fracturing completion device, which comprises an isolator, a differential pressure sliding sleeve, a first pressure-holding sliding sleeve, an open hole packer, a sleeve and a multi-section multi-cluster sliding sleeve structure;
The isolator, the differential pressure sliding sleeve, the first pressure-holding sliding sleeve and the multi-cluster sliding sleeve structure are sequentially connected in series on the sleeve from bottom to top, an open hole packer is arranged between the differential pressure sliding sleeve and the first pressure-holding sliding sleeve, and the open hole packer is arranged between the first pressure-holding sliding sleeve and the multi-cluster sliding sleeve structure;
the inner diameters of the differential pressure sliding sleeve, the first pressure-holding sliding sleeve and the multi-cluster sliding sleeve structure are sequentially increased from bottom to top;
The multi-section multi-cluster sliding sleeve structure is connected through an open hole packer, the inner diameter of the multi-section multi-cluster sliding sleeve structure is sequentially increased from bottom to top, each multi-section multi-cluster sliding sleeve structure comprises a second pressure-holding sliding sleeve and a multi-cluster sliding sleeve, the open hole packer is arranged between the second pressure-holding sliding sleeve and the multi-cluster sliding sleeve, the second pressure-holding sliding sleeve is connected to the lower part of the multi-cluster sliding sleeve, the second pressure-holding sliding sleeve is connected to the upper part of the first pressure-holding sliding sleeve, and the inner diameters of the second pressure-holding sliding sleeve and the multi-cluster sliding sleeve in each multi-section multi-cluster sliding sleeve structure are the same.
Further, the multi-cluster sliding sleeve structure comprises a plurality of multi-cluster sliding sleeves, and open hole packers are arranged among the plurality of multi-cluster sliding sleeves.
Further, an open hole packer is arranged between the second pressure-holding sliding sleeve and the first pressure-holding sliding sleeve.
Further, the device comprises a plurality of first pressure-holding sliding sleeves.
Further, the inner diameters of the first pressure holding sliding sleeves are sequentially increased from bottom to top.
Further, the multi-cluster sliding sleeve comprises a lower joint, a sliding sleeve outer cylinder, a sliding sleeve inner cylinder and an upper joint, wherein the sliding sleeve outer cylinder is connected above the lower joint, the upper joint is connected with the inner wall of the sliding sleeve outer cylinder, and the sliding sleeve inner cylinder is connected with the inner wall of the upper joint.
Further, the axes of the lower joint, the sliding sleeve outer cylinder, the sliding sleeve inner cylinder and the upper joint are overlapped.
Further, the inner barrel of the sliding sleeve is connected with the inner wall of the upper joint through pins.
Further, the upper joint is in threaded connection with the outer barrel of the sliding sleeve.
Further, the lower connector is in threaded connection with the outer barrel of the sliding sleeve.
Further, a groove is formed in the inner wall of the sliding sleeve outer barrel.
Further, a split ball seat is arranged on the inner barrel of the sliding sleeve.
Further, the split ball seat comprises a protruding portion and an insert, a through hole is formed in the protruding portion, and the insert is arranged in the through hole.
Further, a rupture hole is formed in the upper joint, and a rupture structure is arranged in the rupture hole.
Further, the rupture structure includes a rupture disc disposed in the rupture aperture.
Further, the diameter of the rupture disc is based on orifice plate restriction pressure differential principle.
Further, according to the Bernoulli equation, the diameter of the rupture disc is calculated as follows:
Wherein d is the diameter of the rupture disc;
q is displacement;
alpha is the flow coefficient;
ρ is the fluid density.
ΔP is the difference in internal and external pressure of the pipe column at the point after the rupture disc is ruptured.
A method for fracturing and completing a well by using an open hole cluster type sliding sleeve comprises the following steps of:
Step S1, after a pipe column enters a well to a designed position, pressing a setting open hole packer, opening a differential pressure sliding sleeve to carry out head end fracturing, and providing a ball feeding pump liquid channel for the next section;
step S2, putting a fracturing ball into a shaft to realize the opening and fracturing of a first pressure-holding sliding sleeve;
step 3, continuously throwing a fracturing ball into the well bore, and after the fracturing ball opens the multi-cluster sliding sleeve and the second pressure-holding sliding sleeve in the first multi-cluster sliding sleeve structure, increasing the pump pressure to realize the complete opening of fracturing channels of the multi-cluster sliding sleeve and the second pressure-holding sliding sleeve;
and S4, repeating the step S3, and sequentially opening the multi-cluster sliding sleeve and the second pressure-holding sliding sleeve and opening the fracturing channel in other multi-cluster sliding sleeve structures from bottom to top.
Further, in step S1, after the open hole packer is set by pressing, the pump pressure is increased to the designed opening pressure of the differential pressure sliding sleeve, and then the differential pressure sliding sleeve is opened to perform head end fracturing.
According to the open hole cluster type sliding sleeve fracturing completion device, the multi-section multi-cluster sliding sleeve structure is arranged, the first multi-cluster sliding sleeve, the second multi-cluster sliding sleeve and the second pressure-holding sliding sleeve in each section of multi-cluster sliding sleeve structure are the same in inner diameter, the limitation of the inner diameter of a shaft on the arrangement number of the sliding sleeves is reduced, the more the arrangement number of the sliding sleeves is, the longer the horizontal length of a tubular column is, and therefore fracturing of a long horizontal section open hole well is achieved; the method has the advantages that a mode that one rupture ball opens a section of multi-cluster sliding sleeve structure is adopted, a plurality of multi-cluster sliding sleeves and rupture channels of a second pressure-holding sliding sleeve in each section of multi-cluster sliding sleeve structure are simultaneously opened, the displacement requirement for fracturing equipment during fracturing is reduced, when the first multi-cluster sliding sleeve, the second multi-cluster sliding sleeve and the second pressure-holding sliding sleeve sequentially open the rupture channels, the pressure release effect of a first opened rupture hole is avoided, the displacement of the fracturing equipment is further improved to realize the subsequent rupture phenomenon of the rupture disc, the diameter of the rupture disc is designed based on the orifice plate throttling differential pressure principle, the complete rupture opening of the rupture disc is ensured, and the rupture effect of the device is ensured.
According to the open hole cluster type sliding sleeve fracturing completion method, a section of multi-cluster sliding sleeve structure is opened through one fracturing ball, after the multi-cluster sliding sleeve and the second fracturing sliding sleeve are arranged in each section of multi-cluster sliding sleeve structure, the pumping pressure is increased, the mode that all fracturing channels of the multi-cluster sliding sleeve and the second fracturing sliding sleeve are opened is achieved, the displacement requirement on fracturing equipment during fracturing is reduced, and the phenomenon that all subsequent fracturing can be achieved only by further improving the displacement of the fracturing equipment due to the pressure release effect of the first opened fracturing holes when the first multi-cluster sliding sleeve, the second multi-cluster sliding sleeve and the second fracturing sliding sleeve sequentially open the fracturing channels is avoided.
Drawings
FIG. 1 is a schematic illustration of an embodiment of an open hole clustered sliding sleeve fracturing completion apparatus of the present invention.
FIG. 2 is a schematic diagram of a multi-cluster sliding sleeve structure of an open hole clustered sliding sleeve fracturing completion device of the invention.
Fig. 3 is a schematic diagram of a closed state of a first pressure-holding sliding sleeve or a second pressure-holding sliding sleeve of an open hole cluster type sliding sleeve fracturing completion device.
Fig. 4 is a schematic diagram of an open state of a first pressure-holding sliding sleeve or a second pressure-holding sliding sleeve of an open hole cluster type sliding sleeve fracturing completion device.
The hydraulic fracturing device comprises a 1-isolator, a 2-differential pressure sliding sleeve, a 3-first pressure-blocking sliding sleeve, a 4-first-section multi-cluster sliding sleeve structure, a 5-open hole packer, a 6-second-section multi-cluster sliding sleeve structure, a 7-first multi-cluster sliding sleeve, an 8-second multi-cluster sliding sleeve, a 9-second pressure-blocking sliding sleeve, a 10-sleeve, a 41-upper joint, a 42-rupture disc, a 43-pin, a 44-sliding sleeve inner cylinder, a 45-split ball seat, a 46-sliding sleeve outer cylinder, a 47-lower joint, a 451-bulge part, a 452-plug, a 461-groove, a 31-pressure-blocking sliding sleeve lower joint, a 32-pressure-blocking sliding sleeve outer cylinder, a 33-pressure-blocking sliding sleeve inner cylinder, a 34-pressure-blocking sliding sleeve upper joint, a 35-shear pin, a 36-sealing ring, a 331-boss and a 321-fracturing through hole.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments. All other embodiments, based on the embodiments of the invention, which are apparent to those of ordinary skill in the art without inventive faculty, are intended to be within the scope of the invention.
Thus, the following detailed description of the embodiments of the invention, as presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, based on the embodiments of the invention, which are apparent to those of ordinary skill in the art without inventive faculty, are intended to be within the scope of the invention.
It should be noted that like reference numerals and letters refer to like items in the following figures, and thus once an item is defined in one figure, no further definition or explanation thereof is necessary in the following figures.
In the present invention, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed, directly connected, indirectly connected via an intermediate medium, or in communication with each other between two elements or in an interaction relationship between two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.
In order to better understand the purpose, structure and function of the present invention, the following describes the open hole cluster type sliding sleeve fracturing completion device and method in detail.
The direction away from the vertical well is referred to herein as "down" and the direction toward the vertical well is referred to as "up".
Example 1:
As shown in fig. 1, a first embodiment of an open hole cluster type sliding sleeve fracturing completion device of the invention comprises an isolator 1, a differential pressure sliding sleeve 2, a first pressure holding sliding sleeve 3, an open hole packer 5, a sleeve 10 and a multi-cluster sliding sleeve structure;
the isolator 1, the differential pressure sliding sleeve 2, the first pressure-building sliding sleeve 3 and the multi-cluster sliding sleeve structure are sequentially connected in series on the sleeve from bottom to top, the differential pressure sliding sleeve 2 is connected with the first pressure-building sliding sleeve 3 through the open hole packer 5, and the first pressure-building sliding sleeve 3 is connected with the multi-cluster sliding sleeve structure through the open hole packer 5;
The inner diameters of the differential pressure sliding sleeve 2, the first pressure-holding sliding sleeve 3 and the multi-cluster sliding sleeve structure are sequentially increased from bottom to top;
The quantity of many cluster sliding sleeve structures is the multistage, connects through bore hole packer 5 between the multistage many cluster sliding sleeve structures, and the internal diameter of multistage many cluster sliding sleeve structure increases in proper order from the bottom up, and every section many cluster sliding sleeve structure all includes second and presses sliding sleeve 9 and many cluster sliding sleeve, and second presses sliding sleeve 9 to connect in the below of many cluster sliding sleeve, and second presses sliding sleeve 9 to connect in the top of first pressing sliding sleeve 3, and the second in every section many cluster sliding sleeve structure presses sliding sleeve 9 and the internal diameter of many cluster sliding sleeve the same.
Through setting up second that the internal diameter is the same in many clusters sliding sleeve structure and holding down pressure sliding sleeve 9 and many clusters sliding sleeve, reduced the pit shaft internal diameter and set up the restriction of quantity to the sliding sleeve, increased the horizontal length of tubular column like this to realize the fracturing of long horizontal segment open hole well.
Example 2:
as shown in fig. 1, a second embodiment of an open hole cluster type sliding sleeve fracturing completion device of the invention comprises an isolator 1, a differential pressure sliding sleeve 2, a first pressure holding sliding sleeve 3, an open hole packer 5, a sleeve 10 and a multi-cluster sliding sleeve structure;
the isolator 1, the differential pressure sliding sleeve 2, the first pressure-building sliding sleeve 3 and the multi-cluster sliding sleeve structure are sequentially connected in series on the sleeve from bottom to top, the differential pressure sliding sleeve 2 is connected with the first pressure-building sliding sleeve 3 through the open hole packer 5, and the first pressure-building sliding sleeve 3 is connected with the multi-cluster sliding sleeve structure through the open hole packer 5;
The inner diameters of the differential pressure sliding sleeve 2, the first pressure-holding sliding sleeve 3 and the multi-cluster sliding sleeve structure are sequentially increased from bottom to top;
The quantity of many cluster sliding sleeve structures is the multistage, connects through bore hole packer 5 between the multistage many cluster sliding sleeve structures, and the internal diameter of multistage many cluster sliding sleeve structure increases in proper order from the bottom up, and every section many cluster sliding sleeve structure all includes second and presses sliding sleeve 9 and many cluster sliding sleeve, and second presses sliding sleeve 9 to connect in the below of many cluster sliding sleeve, and second presses sliding sleeve 9 to connect in the top of first pressing sliding sleeve 3, and the second in every section many cluster sliding sleeve structure presses sliding sleeve 9 and the internal diameter of many cluster sliding sleeve the same.
Through setting up second that the internal diameter is the same in many clusters sliding sleeve structure and holding down pressure sliding sleeve 9 and many clusters sliding sleeve, reduced the pit shaft internal diameter and set up the restriction of quantity to the sliding sleeve, increased the horizontal length of tubular column like this to realize the fracturing of long horizontal segment open hole well.
The present embodiment is different from the first embodiment in that:
The multi-cluster sliding sleeve structure comprises a plurality of multi-cluster sliding sleeves, so that the horizontal length of the tubular column is increased, and the fracturing of the open hole well with a long horizontal section is realized;
The device comprises a multi-section multi-cluster sliding sleeve structure, wherein the inner diameters of the multi-section multi-cluster sliding sleeve structure are sequentially increased from bottom to top, so that the fracturing balls are opened from a first-section multi-cluster sliding sleeve structure positioned at the lowest part;
the device comprises a plurality of first pressure-holding sliding sleeves 3, wherein the inner diameters of the plurality of first pressure-holding sliding sleeves 3 are sequentially increased from bottom to top, and thus the fracturing balls are opened from the first pressure-holding sliding sleeves 3 positioned at the lowest position.
Example 3:
As shown in fig. 1, a third embodiment of an open hole cluster type sliding sleeve fracturing completion device of the invention comprises an isolator 1, a differential pressure sliding sleeve 2, a first pressure holding sliding sleeve 3, an open hole packer 5, a sleeve 10 and a multi-cluster sliding sleeve structure;
the isolator 1, the differential pressure sliding sleeve 2, the first pressure-building sliding sleeve 3 and the multi-cluster sliding sleeve structure are sequentially connected in series on the sleeve from bottom to top, the differential pressure sliding sleeve 2 is connected with the first pressure-building sliding sleeve 3 through the open hole packer 5, and the first pressure-building sliding sleeve 3 is connected with the multi-cluster sliding sleeve structure through the open hole packer 5;
The inner diameters of the differential pressure sliding sleeve 2, the first pressure-holding sliding sleeve 3 and the multi-cluster sliding sleeve structure are sequentially increased from bottom to top;
The quantity of many cluster sliding sleeve structures is the multistage, connects through bore hole packer 5 between the multistage many cluster sliding sleeve structures, and the internal diameter of multistage many cluster sliding sleeve structure increases in proper order from the bottom up, and every section many cluster sliding sleeve structure all includes second and presses sliding sleeve 9 and many cluster sliding sleeve, and second presses sliding sleeve 9 to connect in the below of many cluster sliding sleeve, and second presses sliding sleeve 9 to connect in the top of first pressing sliding sleeve 3, and the second in every section many cluster sliding sleeve structure presses sliding sleeve 9 and the internal diameter of many cluster sliding sleeve the same.
Through setting up second that the internal diameter is the same in many clusters sliding sleeve structure and holding down pressure sliding sleeve 9 and many clusters sliding sleeve, reduced the pit shaft internal diameter and set up the restriction of quantity to the sliding sleeve, increased the horizontal length of tubular column like this to realize the fracturing of long horizontal segment open hole well.
The multi-cluster sliding sleeve structure comprises a plurality of multi-cluster sliding sleeves, so that the horizontal length of the tubular column is increased, and the fracturing of the open hole well with a long horizontal section is realized;
The device comprises a multi-section multi-cluster sliding sleeve structure, wherein the inner diameters of the multi-section multi-cluster sliding sleeve structure are sequentially increased from bottom to top, so that the fracturing balls are opened from a first-section multi-cluster sliding sleeve structure positioned at the lowest part;
the device comprises a plurality of first pressure-holding sliding sleeves 3, wherein the inner diameters of the plurality of first pressure-holding sliding sleeves 3 are sequentially increased from bottom to top, and thus the fracturing balls are opened from the first pressure-holding sliding sleeves 3 positioned at the lowest position.
The present embodiment is different from the above embodiments in that:
as shown in fig. 2, the multi-cluster sliding sleeve comprises a lower joint 47, a sliding sleeve outer cylinder 46, a sliding sleeve inner cylinder 44 and an upper joint 41, wherein the sliding sleeve outer cylinder 46 is connected above the lower joint 47, the upper joint 41 is connected with the inner wall of the sliding sleeve outer cylinder 46, the sliding sleeve inner cylinder 44 is connected with the upper joint 41 through a pin 43, and the sliding sleeve inner cylinder 44 is attached to the inner wall of the sliding sleeve outer cylinder 46;
The upper joint 41 is in threaded connection with the sliding sleeve outer cylinder 46, and the lower joint 47 is in threaded connection with the sliding sleeve outer cylinder 46;
The sliding sleeve inner barrel 44 is provided with a split ball seat 45, the split ball seat 45 comprises a protruding portion 451 and an insert 452, a through hole is formed in the protruding portion 451, and the insert 452 is arranged in the through hole;
A groove 461 is arranged on the inner wall of the sliding sleeve outer cylinder 46;
The upper joint 41 is also provided with a through hole, a pin 43 is arranged in the through hole, and the pin 43 limits the axial displacement of the sliding sleeve inner cylinder 44;
The upper joint 41 is provided with a rupture hole in which a rupture structure is arranged, the rupture structure comprises a rupture disc 42, and the rupture disc 42 is arranged at the upper part of the rupture hole;
Multiple rupture discs 42 of a multi-cluster sliding sleeve structure are difficult to break simultaneously in an absolute sense due to machining errors, when part of the rupture discs break first and then liquid is discharged, displacement loss is caused, pumping pressure is reduced, the remaining rupture discs of the section are not enough to be opened, and the problem can be solved by continuously increasing the displacement, but the displacement is limited due to the limitations of pump trucks, reservoirs and the like in practical field implementation. The solution of the patent is to design the diameter of the rupture discs based on the orifice plate throttling differential pressure principle, wherein under different displacement conditions, the number of the rupture discs 42 of a section of sliding sleeve is different from the diameter of the rupture discs 42, and the number and the diameter of the rupture discs 42 are matched with the displacement. To ensure that the rupture disc 42 is fully ruptured, the outside-tube restriction pressure differential should still be higher than the rupture pressure of the rupture disc 42 when only one of the rupture discs 42 of a segment of the sliding sleeve remains unopened.
The basic principle of orifice plate restriction pressure differential is based on the Bernoulli equation, and the equation for determining the diameter of rupture disc 42 is as follows:
Wherein d is the diameter of the rupture disc;
q is displacement;
A flow coefficient, related to the structure and shape of the rupture disc;
ρ, fluid density;
ΔP is the difference in internal and external pressure of the pipe column at the point after the rupture disc is ruptured.
This patent relates to the design and calculation of the diameter of rupture disc 42 and does not relate to the flow coefficient determination of rupture discs of different configurations and shapes.
As shown in fig. 3 and 4, the first pressure-building sliding sleeve 3 and the second pressure-building sliding sleeve 9 have the same structure, the first pressure-building sliding sleeve 3 comprises a pressure-building sliding sleeve lower joint 31, a pressure-building sliding sleeve outer barrel 32, a pressure-building sliding sleeve inner barrel 33 and a pressure-building sliding sleeve upper joint 34, the pressure-building sliding sleeve outer barrel 32 is connected with the upper side of the pressure-building sliding sleeve lower joint 31 in a threaded manner, the pressure-building sliding sleeve upper joint 34 is connected with the upper side of the pressure-building sliding sleeve outer barrel 32 in a threaded manner, the pressure-building sliding sleeve inner barrel 33 is arranged in the pressure-building sliding sleeve outer barrel 32, the pressure-building sliding sleeve inner barrel 33 is connected with the pressure-building sliding sleeve outer barrel 32 through shear pins 35, and a sealing ring 36 is arranged in the circumferential direction of the pressure-building sliding sleeve inner barrel 33.
The inner wall of the pressure-holding sliding sleeve inner cylinder 33 is circumferentially provided with a boss 331, and the pressure-holding sliding sleeve outer cylinder 32 is provided with a fracturing through hole 321.
The working process of the open hole cluster type sliding sleeve fracturing completion device provided by the invention is as follows:
Taking the device comprising two sections of multi-cluster sliding sleeve structures and each section of multi-cluster sliding sleeve structure comprising two multi-cluster sliding sleeves as an example for explanation;
the inner diameters of the first multi-cluster sliding sleeve 7, the second multi-cluster sliding sleeve 8 and the second pressure-holding sliding sleeve 9 in the second-section multi-cluster sliding sleeve structure 6 are the same in size, but the inner diameter of the sliding sleeve in the second-section multi-cluster sliding sleeve structure 6 is larger than the inner diameter of the sliding sleeve in the first-section multi-cluster sliding sleeve structure 4.
An open hole packer 5 is arranged between the first section multi-cluster sliding sleeve structure 4 and the second section multi-cluster sliding sleeve structure 6. The diameter of the rupture ball matched with the first section multi-cluster sliding sleeve structure 4 or the second section multi-cluster sliding sleeve structure 6 is slightly larger than the inner diameter of the split ball seat 45 of the sliding sleeve inner cylinder 44.
After the pipe column enters a well to a designed position, pressing a setting open hole packer 5, increasing a certain pump pressure to the designed opening pressure of a differential pressure sliding sleeve 2 during fracturing, opening the differential pressure sliding sleeve 2 to start first-stage fracturing, and providing a ball feeding pump liquid channel for the next stage;
Putting a fracturing ball matched with the inner diameter of the first pressure-holding sliding sleeve 3 positioned at the lowest position into a shaft, wherein the fracturing ball cannot pass through a boss 331 of the first pressure-holding sliding sleeve 3, the fracturing ball acts on the boss 331 to exert axial force, the pressure-holding sliding sleeve inner cylinder 33 is subjected to axial force, a shear pin 35 is sheared by the shear force, the pressure-holding sliding sleeve inner cylinder 33 slides along the inner wall of the pressure-holding sliding sleeve outer cylinder 32, a fracturing through hole 321 is not blocked by the pressure-holding sliding sleeve inner cylinder 33 any more, the first pressure-holding sliding sleeve 3 is opened, liquid in the pressure-holding sliding sleeve inner cylinder 33 flows out from the fracturing through hole 321, and a fracturing channel is opened;
Then continuously sequentially throwing fracturing balls matched with the inner diameters of other first pressure-holding sliding sleeves 3, sequentially opening the other first pressure-holding sliding sleeves 3 to open a fracturing channel, and completing fracturing of reservoirs at the other first pressure-holding sliding sleeves 3;
Next, a rupture ball is opened and the first multi-cluster sliding sleeve structure 4 is fractured:
The inner diameters of the first multi-cluster sliding sleeve 7, the second multi-cluster sliding sleeve 8 and the second pressure-holding sliding sleeve 9 in the first-section multi-cluster sliding sleeve structure 4 are the same.
Pressing and throwing a fracturing ball corresponding to the inner diameter of the first multi-cluster sliding sleeve structure 4 into a shaft, wherein the fracturing ball cannot pass through a split ball seat 45 of the first multi-cluster sliding sleeve 7, the fracturing ball acts on a bulge 451 to exert axial force, the sliding sleeve inner barrel 44 is acted by axial force, the pin 43 is sheared by shearing force, the sliding sleeve inner barrel 44 slides along the inner wall of the sliding sleeve outer barrel 46, the first multi-cluster sliding sleeve is opened, the rupture disc 42 is exposed, but a fracturing channel is not opened, the sliding sleeve inner barrel 44 continues to slide, an insert 452 falls into a groove 461 on the sliding sleeve outer barrel 46, the inner diameter of the split ball seat 45 is increased, and the fracturing ball passes through the first multi-cluster sliding sleeve 7;
the rupture ball reaches the split ball seat 45 of the second multi-cluster sliding sleeve 8, the second multi-cluster sliding sleeve 8 is opened, the rupture disc 42 is exposed, but the fracturing channel is not opened, the sliding sleeve inner cylinder 44 continues to slide, the plug 452 falls into the groove 461 on the sliding sleeve outer cylinder 46, the inner diameter of the split ball seat 45 is enlarged, and the rupture ball passes through the second multi-cluster sliding sleeve 8;
The fracturing ball reaches in the second pressure-holding sliding sleeve 9, the fracturing ball reaches the boss 331 of the second pressure-holding sliding sleeve 9 and can not pass through, the fracturing ball acts on the boss 331 to exert an axial force, the pressure-holding sliding sleeve inner cylinder 33 is acted by the axial force, the shear pin 35 is sheared by the shearing force, the pressure-holding sliding sleeve inner cylinder 33 slides along the inner wall of the pressure-holding sliding sleeve outer cylinder 32, the fracturing through hole 321 is not blocked by the pressure-holding sliding sleeve inner cylinder 33 any more, the first pressure-holding sliding sleeve 3 is opened, liquid in the pressure-holding sliding sleeve inner cylinder 33 flows out of the fracturing through hole 321, the fracturing channel of the second pressure-holding sliding sleeve 9 is opened, the fracturing channels of the first-section multi-cluster sliding sleeve structure 4 are not opened, but the fracturing channels of the first multi-cluster sliding sleeve 7 and the second multi-cluster sliding sleeve 8 are continuously increased in pumping pressure (increased displacement) to a certain value, the fracturing disc 42 is broken after being subjected to liquid pressure, and the fracturing channels of the first-section multi-cluster sliding sleeve 4 are opened completely, and fracturing is carried out.
Next, a rupture ball opening and fracturing of the second-stage multi-cluster sliding sleeve structure 6 is performed:
the second-stage multi-cluster sliding sleeve structure 6 is opened and fractured in the same manner as the first-stage multi-cluster sliding sleeve structure 4.
According to the open hole cluster type sliding sleeve fracturing completion device, a multi-section multi-cluster sliding sleeve structure is arranged, the inner diameters of a first multi-cluster sliding sleeve 7, a second multi-cluster sliding sleeve 8 and a second pressure-holding sliding sleeve 9 in each section of multi-cluster sliding sleeve structure are the same, the limit of the inner diameter of a shaft to the arrangement number of the sliding sleeves is reduced, the larger the arrangement number of the sliding sleeves is, the longer the horizontal length of a tubular column is, so that fracturing of a long horizontal section open hole well is realized, a mode that one rupture ball opens one section of multi-cluster sliding sleeve structure is adopted, the rupture channels of the multi-cluster sliding sleeve and the second pressure-holding sliding sleeve 9 in each section of multi-cluster sliding sleeve structure are simultaneously opened, the displacement requirement on fracturing equipment is reduced, the pressure relief effect of the first multi-cluster sliding sleeve 7, the second multi-cluster sliding sleeve 8 and the second pressure-holding sliding sleeve 9 which are opened in sequence is avoided, the phenomenon that the subsequent rupture of the rupture disc 42 can be realized only by further improving the displacement of the first opened rupture holes is required, and the diameter of the rupture disc 42 is designed based on the orifice plate throttling differential pressure principle, and the whole rupture effect of the rupture disc 42 is ensured.
Example 4:
The invention discloses a method for fracturing and completing an open hole cluster type sliding sleeve, which is used for the open hole cluster type sliding sleeve fracturing and completing device and comprises the following steps:
step S1, after a pipe column enters a well to a designed position, pressing a setting open hole packer 5, pressing fracturing fluid into the pipe column to open a pressure difference sliding sleeve 2 for head end fracturing, and providing a ball feeding pump fluid channel for the next section;
step S2, putting a fracturing ball into a shaft to realize the opening and fracturing of the first pressure-holding sliding sleeve 3;
Step S3, continuously throwing fracturing balls into a shaft, and after the fracturing balls open the multi-cluster sliding sleeve and the second pressure-holding sliding sleeve 9 in the first-stage multi-cluster sliding sleeve structure 4, increasing the pump pressure to realize the complete opening of fracturing channels of the multi-cluster sliding sleeve and the second pressure-holding sliding sleeve 9;
step S4, repeating the step S3, and sequentially opening the multi-cluster sliding sleeve and the second pressure-holding sliding sleeve 9 in the other multi-cluster sliding sleeve structures 4 from bottom to top and opening the fracturing channels;
Step S1, during fracturing, the pump pressure is increased to the design opening pressure of the differential pressure sliding sleeve 2, and the differential pressure sliding sleeve 2 is opened to start head end fracturing;
According to the open hole cluster type sliding sleeve fracturing completion method, a section of multi-cluster sliding sleeve structure is opened through one fracturing ball, after the multi-cluster sliding sleeve and the second fracturing sliding sleeve 9 are arranged in each section of multi-cluster sliding sleeve structure 4, the pumping pressure is increased, the mode that all fracturing channels of the multi-cluster sliding sleeve and the second fracturing sliding sleeve 9 are opened is achieved, the displacement requirement on fracturing equipment in fracturing is reduced, and the phenomenon that all subsequent fracturing can be achieved only by further improving the displacement of the fracturing equipment due to the pressure release effect of the first opened fracturing holes when the first multi-cluster sliding sleeve 7, the second multi-cluster sliding sleeve 8 and the second fracturing sliding sleeve 9 are opened successively is avoided.
The above description is only of the preferred embodiments of the present invention and is not intended to limit the present invention, but various modifications and variations can be made to the present invention by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention are included in the protection scope of the present invention.

Claims (19)

1.一种裸眼簇式滑套压裂完井装置，其特征在于，包括隔离器、压差滑套、第一憋压滑套、裸眼封隔器、套管以及多段多簇滑套结构；1. An open hole cluster sliding sleeve fracturing completion device, characterized in that it includes an isolator, a differential pressure sliding sleeve, a first pressure holding sliding sleeve, an open hole packer, a casing and a multi-stage multi-cluster sliding sleeve structure; 隔离器、压差滑套、第一憋压滑套以及多簇滑套结构依次从下到上串联在套管上，压差滑套与第一憋压滑套之间设置有裸眼封隔器，第一憋压滑套与多簇滑套结构之间设置有裸眼封隔器；The isolator, the pressure differential sliding sleeve, the first pressure holding sliding sleeve and the multi-cluster sliding sleeve structure are sequentially connected in series on the casing from bottom to top, an open hole packer is arranged between the pressure differential sliding sleeve and the first pressure holding sliding sleeve, and an open hole packer is arranged between the first pressure holding sliding sleeve and the multi-cluster sliding sleeve structure; 压差滑套、第一憋压滑套以及多簇滑套结构的内径从下到上依次增大；The inner diameters of the differential pressure sliding sleeve, the first pressure holding sliding sleeve and the multi-cluster sliding sleeve structure increase from bottom to top; 多段多簇滑套结构之间通过裸眼封隔器连接，多段多簇滑套结构的内径从下到上依次增大，每段多簇滑套结构均包括第二憋压滑套和多簇滑套，第二憋压滑套和多簇滑套之间设置有裸眼封隔器，第二憋压滑套连接在多簇滑套的下方，第二憋压滑套连接在第一憋压滑套的上方，每段多簇滑套结构中的第二憋压滑套和多簇滑套的内径相同。The multi-section multi-cluster sliding sleeve structures are connected by open hole packers. The inner diameter of the multi-section multi-cluster sliding sleeve structures increases from bottom to top. Each section of the multi-cluster sliding sleeve structure includes a second pressure-holding sliding sleeve and a multi-cluster sliding sleeve. An open hole packer is arranged between the second pressure-holding sliding sleeve and the multi-cluster sliding sleeve. The second pressure-holding sliding sleeve is connected below the multi-cluster sliding sleeve. The second pressure-holding sliding sleeve is connected above the first pressure-holding sliding sleeve. The inner diameters of the second pressure-holding sliding sleeve and the multi-cluster sliding sleeve in each section of the multi-cluster sliding sleeve structure are the same. 2.根据权利要求1所述的裸眼簇式滑套压裂完井装置，其特征在于，每段多簇滑套结构包括多个多簇滑套，多个多簇滑套之间设置有裸眼封隔器。2. The open hole cluster sliding sleeve fracturing completion device according to claim 1 is characterized in that each section of the multi-cluster sliding sleeve structure includes a plurality of multi-cluster sliding sleeves, and an open hole packer is arranged between the plurality of multi-cluster sliding sleeves. 3.根据权利要求1所述的裸眼簇式滑套压裂完井装置，其特征在于，第二憋压滑套与第一憋压滑套之间设置有裸眼封隔器。3. The open hole cluster sleeve fracturing completion device according to claim 1, characterized in that an open hole packer is provided between the second pressure holding sliding sleeve and the first pressure holding sliding sleeve. 4.根据权利要求1所述的裸眼簇式滑套压裂完井装置，其特征在于，包括多个第一憋压滑套。4. The open hole cluster sliding sleeve fracturing completion device according to claim 1, characterized in that it comprises a plurality of first pressure holding sliding sleeves. 5.根据权利要求4所述的裸眼簇式滑套压裂完井装置，其特征在于，多个第一憋压滑套的内径从下到上依次增大。5. The open hole cluster sliding sleeve fracturing completion device according to claim 4, characterized in that the inner diameters of the plurality of first pressure holding sliding sleeves increase sequentially from bottom to top. 6.根据权利要求1所述的裸眼簇式滑套压裂完井装置，其特征在于，多簇滑套包括下接头、滑套外筒、滑套内筒以及上接头，滑套外筒连接在下接头的上方，上接头与滑套外筒的内壁连接，滑套内筒与上接头的内壁连接。6. The open hole cluster sliding sleeve fracturing completion device according to claim 1 is characterized in that the multi-cluster sliding sleeve includes a lower joint, a sliding sleeve outer tube, a sliding sleeve inner tube and an upper joint, the sliding sleeve outer tube is connected above the lower joint, the upper joint is connected to the inner wall of the sliding sleeve outer tube, and the sliding sleeve inner tube is connected to the inner wall of the upper joint. 7.根据权利要求6所述的裸眼簇式滑套压裂完井装置，其特征在于，下接头、滑套外筒、滑套内筒以及上接头的轴线重合。7. The open hole cluster sliding sleeve fracturing completion device according to claim 6, characterized in that the axes of the lower joint, the sliding sleeve outer tube, the sliding sleeve inner tube and the upper joint coincide. 8.根据权利要求6所述的裸眼簇式滑套压裂完井装置，其特征在于，滑套内筒与上接头的内壁通过销钉连接。8. The open hole cluster sliding sleeve fracturing completion device according to claim 6, characterized in that the inner tube of the sliding sleeve is connected to the inner wall of the upper joint by pins. 9.根据权利要求6所述的裸眼簇式滑套压裂完井装置，其特征在于，上接头与滑套外筒螺纹连接。9. The open hole cluster sliding sleeve fracturing completion device according to claim 6, characterized in that the upper joint is threadedly connected to the outer tube of the sliding sleeve. 10.根据权利要求6所述的裸眼簇式滑套压裂完井装置，其特征在于，下接头与滑套外筒螺纹连接。10. The open hole cluster sliding sleeve fracturing completion device according to claim 6, characterized in that the lower joint is threadedly connected to the outer tube of the sliding sleeve. 11.根据权利要求6所述的裸眼簇式滑套压裂完井装置，其特征在于，滑套外筒的内壁上设置有凹槽。11. The open hole cluster sliding sleeve fracturing completion device according to claim 6, characterized in that a groove is provided on the inner wall of the sliding sleeve outer cylinder. 12.根据权利要求11所述的裸眼簇式滑套压裂完井装置，其特征在于，滑套内筒上设置有分体球座。12. The open hole cluster sliding sleeve fracturing completion device according to claim 11, characterized in that a split ball seat is provided on the inner tube of the sliding sleeve. 13.根据权利要求12所述的裸眼簇式滑套压裂完井装置，其特征在于，分体球座包括凸起部分和插件，凸起部分内部设置有通孔，插件设置在通孔中。13. The open hole cluster sliding sleeve fracturing completion device according to claim 12, characterized in that the split ball seat comprises a raised portion and a plug-in unit, a through hole is arranged inside the raised portion, and the plug-in unit is arranged in the through hole. 14.根据权利要求6所述的裸眼簇式滑套压裂完井装置，其特征在于，上接头上开设有破裂孔，破裂孔中设置有破裂结构。14. The open hole cluster sliding sleeve fracturing completion device according to claim 6, characterized in that a rupture hole is opened on the upper joint, and a rupture structure is arranged in the rupture hole. 15.根据权利要求14所述的裸眼簇式滑套压裂完井装置，其特征在于，破裂结构包括破裂盘，破裂盘设置在破裂孔中。15 . The open hole cluster sliding sleeve fracturing completion device according to claim 14 , wherein the rupture structure comprises a rupture disk, and the rupture disk is arranged in the rupture hole. 16.根据权利要求15所述的裸眼簇式滑套压裂完井装置，其特征在于，所述破裂盘的直径基于孔板节流压差原理得到。16 . The open hole cluster sliding sleeve fracturing completion device according to claim 15 , wherein the diameter of the rupture disk is obtained based on the orifice plate throttling pressure difference principle. 17.根据权利要求16所述的裸眼簇式滑套压裂完井装置，其特征在于，依据伯努利方程，破裂盘的直径的计算公式如下：17. The open hole cluster sliding sleeve fracturing completion device according to claim 16, characterized in that, according to the Bernoulli equation, the calculation formula of the diameter of the rupture disk is as follows: 式中：d为破裂盘直径；Where: d is the rupture disk diameter; q为排量；q is the displacement; α为流量系数；α is the flow coefficient; ρ为流体密度；ρ is the fluid density; △P为破裂盘破裂后管柱内外压差值。△P is the pressure difference between the inside and outside of the tubing string after the rupture disk ruptures. 18.一种裸眼簇式滑套压裂完井方法，其特征在于，使用权利要求1所述的裸眼簇式滑套压裂完井装置，包括以下步骤：18. An open hole cluster sleeve fracturing completion method, characterized in that the open hole cluster sleeve fracturing completion device according to claim 1 is used, comprising the following steps: 步骤S1：管柱入井至设计位置后，打压坐封裸眼封隔器，打开压差滑套进行首段压裂，并为下一段提供送球泵液通道；Step S1: After the tubing string is put into the well to the designed position, the open hole packer is pressurized to seal, the differential pressure sleeve is opened to perform the first stage fracturing, and a ball pump fluid channel is provided for the next stage; 步骤S2：向井筒内投入压裂球，实现第一憋压滑套的开启和压裂；Step S2: inserting a fracturing ball into the wellbore to open the first pressure-holding sliding sleeve and perform fracturing; 步骤S3：继续向井筒内投入压裂球，压裂球打开第一段多簇滑套结构中多簇滑套和第二憋压滑套后，提高泵压，实现多簇滑套和第二憋压滑套压裂通道的全部开启；Step S3: continue to put fracturing balls into the wellbore, and after the fracturing balls open the multi-cluster sliding sleeves and the second pressure-holding sliding sleeves in the first-stage multi-cluster sliding sleeve structure, increase the pump pressure to fully open the fracturing channels of the multi-cluster sliding sleeves and the second pressure-holding sliding sleeves; 步骤S4：重复步骤S3，从下至上依次实现其他多簇滑套结构中多簇滑套和第二憋压滑套的打开及压裂通道的开启。Step S4: repeat step S3 to sequentially open the multi-cluster sliding sleeves and the second pressure-holding sliding sleeve in other multi-cluster sliding sleeve structures and open the fracturing channels from bottom to top. 19.根据权利要求18所述的裸眼簇式滑套压裂完井方法，其特征在于，所述步骤S1中，打压坐封裸眼封隔器后，提高泵压至压差滑套的设计开启压力，再打开压差滑套进行首段压裂。19. The open hole cluster sleeve fracturing completion method according to claim 18, characterized in that in said step S1, after the open hole packer is pressurized and sealed, the pump pressure is increased to the designed opening pressure of the differential pressure sleeve, and then the differential pressure sleeve is opened to perform the first stage of fracturing.
CN202310637012.4A 2023-05-31 2023-05-31 Open hole cluster sliding sleeve fracturing completion device and method Pending CN119062281A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN119373457A (en) * 2025-01-02 2025-01-28 西安洛科电子科技股份有限公司 A full-diameter multi-stage cementing and fracturing intelligent sliding sleeve

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN119373457A (en) * 2025-01-02 2025-01-28 西安洛科电子科技股份有限公司 A full-diameter multi-stage cementing and fracturing intelligent sliding sleeve

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