CN112814639A - Expansion type staged fracturing process pipe column and fracturing method - Google Patents
Expansion type staged fracturing process pipe column and fracturing method Download PDFInfo
- Publication number
- CN112814639A CN112814639A CN202110153899.0A CN202110153899A CN112814639A CN 112814639 A CN112814639 A CN 112814639A CN 202110153899 A CN202110153899 A CN 202110153899A CN 112814639 A CN112814639 A CN 112814639A
- Authority
- CN
- China
- Prior art keywords
- sealing
- expansion packer
- ball
- capsule expansion
- string
- 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
Links
- 238000000034 method Methods 0.000 title claims abstract description 47
- 230000008569 process Effects 0.000 title claims abstract description 36
- 239000007788 liquid Substances 0.000 claims abstract description 76
- 239000002775 capsule Substances 0.000 claims abstract description 71
- 238000005553 drilling Methods 0.000 claims abstract description 41
- 238000007789 sealing Methods 0.000 claims description 126
- 238000010276 construction Methods 0.000 claims description 12
- 210000000078 claw Anatomy 0.000 claims description 11
- 238000005086 pumping Methods 0.000 claims description 8
- 238000004140 cleaning Methods 0.000 claims description 5
- 235000017166 Bambusa arundinacea Nutrition 0.000 claims description 4
- 235000017491 Bambusa tulda Nutrition 0.000 claims description 4
- 241001330002 Bambuseae Species 0.000 claims description 4
- 235000015334 Phyllostachys viridis Nutrition 0.000 claims description 4
- 239000011425 bamboo Substances 0.000 claims description 4
- 239000012530 fluid Substances 0.000 claims description 3
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 12
- NMJORVOYSJLJGU-UHFFFAOYSA-N methane clathrate Chemical compound C.C.C.C.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O NMJORVOYSJLJGU-UHFFFAOYSA-N 0.000 description 9
- 238000010586 diagram Methods 0.000 description 4
- 239000003345 natural gas Substances 0.000 description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 239000007789 gas Substances 0.000 description 2
- 238000005065 mining Methods 0.000 description 2
- 230000009466 transformation Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 238000009933 burial Methods 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 239000003209 petroleum derivative Substances 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
Images
Classifications
-
- 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
-
- 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
- E21B21/00—Methods or apparatus for flushing boreholes, e.g. by use of exhaust air from motor
-
- 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
- E21B33/126—Packers; Plugs with fluid-pressure-operated elastic cup or skirt
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (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)
- Mechanical Engineering (AREA)
- Consolidation Of Soil By Introduction Of Solidifying Substances Into Soil (AREA)
Abstract
The invention discloses an expansion type staged fracturing process pipe column and a fracturing method, wherein the pipe column comprises a pipe joint connected with a drilling tool, a telescopic assembly connected with the pipe joint, a first capsule expansion packer connected with the telescopic assembly, an ejector connected with the first capsule expansion packer, a second capsule expansion packer connected with the ejector and a ball receiving barrel connected with the second capsule expansion packer, wherein the pipe joint, the telescopic assembly, the first capsule expansion packer, the ejector, the second capsule expansion packer and the ball receiving barrel are sequentially connected and communicated, the telescopic assembly comprises an outer sleeve and an inner sleeve, the outer sleeve is movably arranged in the outer sleeve, a pressure guide channel communicated with the first capsule expansion packer and the second capsule expansion packer is arranged on the outer sleeve, a liquid inlet communicated with the pressure guide channel is arranged on the inner side wall of the outer sleeve, the side wall of the inner sleeve is provided with a liquid outlet communicated with the inner part of the inner sleeve.
Description
Technical Field
The invention relates to the technical field of natural gas hydrate reservoir transformation, in particular to an expansion type staged fracturing process pipe column and a fracturing method.
Background
The natural gas hydrate is a solid mineral which is formed by connecting water and methane molecules through molecular bonds to form a cage-shaped lattice and is formed in a low-temperature and high-pressure environment, is filled or deposited on seabed and land permafrost layers, has the advantages of large reserve, wide distribution, shallow burial, high energy density and the like, can generate 168 standard-volume methane gas and 0.8 standard-volume water by decomposing per unit volume of the natural gas hydrate, and is known as a novel efficient clean alternative energy source with the highest potential.
The natural gas hydrate can directly reach a reservoir stratum of the natural gas hydrate through a shaft built by drilling, the thermodynamic conditions such as the temperature or the pressure of the reservoir stratum are changed, the combination environment of the hydrate is damaged, the natural gas hydrate is promoted to be decomposed into water and natural gas, and then the decomposed natural gas is collected and conveyed to the ground by adopting a natural gas mining process, so that the mining of the hydrate is realized. Because the natural gas hydrate has phase state change, and has larger exploitation difficulty compared with the conventional petroleum and natural gas, the exploitation of the natural gas hydrate is still in an exploration stage so far.
The natural gas hydrate mainly exists in a fine silt reservoir with high mud content, the porosity is small, the permeability is extremely low, economic yield is difficult to provide without reservoir transformation, but the structure of the hydrate reservoir is soft and is easy to be hydrated and decomposed when being heated, and a well completion mode of casing well cementation cannot be adopted, so that the cased well staged fracturing process commonly used in the oil and gas industry cannot be applicable, the stratum structure of the hydrate reservoir is loose and weak in strength, the well wall is easy to be squeezed and deformed after being stressed, and effective support cannot be provided for a conventional reusable mechanical packer.
Disclosure of Invention
Aiming at the defects in the prior art, the invention provides an expansion type staged fracturing process pipe column and a fracturing method.
The technical scheme adopted by the invention for solving the technical problems is as follows: constructing an expansion type staged fracturing process pipe column, wherein the pipe column comprises a pipe joint for connecting with a drilling tool, an expansion assembly connected with the pipe joint, a first capsule expansion packer connected with the expansion assembly, an ejector connected with the first capsule expansion packer, a second capsule expansion packer connected with the ejector, and a ball receiving barrel connected with the second capsule expansion packer, wherein the pipe joint, the expansion assembly, the first capsule expansion packer, the ejector, the second capsule expansion packer and the ball receiving barrel are sequentially connected and communicated, the expansion assembly comprises an outer sleeve and an inner sleeve, the inner sleeve is movably arranged in the outer sleeve, the outer sleeve is provided with a pressure guide channel communicated with the first capsule expansion packer and the second capsule expansion packer, the inner side wall of the outer sleeve is provided with a liquid inlet communicated with the pressure guide channel, the side wall of the inner sleeve is provided with a liquid outlet communicated with the inside of the inner sleeve, a first sealing element and a second sealing element are arranged between the inner sleeve and the outer sleeve in a padding mode, the first sealing element and the second sealing element are fixedly arranged on the inner side wall of the outer sleeve respectively and are located on two sides of the liquid inlet respectively, the first end of the inner sleeve is connected and communicated with the pipe joint, and the second end of the inner sleeve is provided with a sealing ball seat used for stopping a sealing ball.
In the invention, the pipe joint is a safety joint, the first end of the ball receiving cylinder is connected and communicated with the second capsule expansion packer, and the second end of the ball receiving cylinder is closed.
In the expansion type staged fracturing process tubular column, the number of the pressure guide channels is two, and the pressure guide channels are arranged on the side wall of the outer sleeve.
In the tubular column for the expansion type staged fracturing process, the inner sleeve is provided with the limiting piece protruding out of the outer wall surface of the inner sleeve, and the inner wall surface of the outer sleeve is provided with the limiting groove for limiting the sliding range of the limiting piece.
In the expansion type staged fracturing process tubular column, a third sealing element is fixedly arranged on the inner side wall of the outer sleeve, and the first sealing element, the second sealing element and the third sealing element are sequentially arranged on the inner side wall of the outer sleeve;
when the limiting piece slides to the end part of the first end of the limiting groove, the liquid outlet is positioned between the first sealing piece and the second sealing piece; when the limiting piece slides to the end part of the second end of the limiting groove, the liquid outlet is positioned between the second sealing piece and the third sealing piece.
In an expandable staged fracturing process string according to the invention, the first seal comprises at least one first seal ring, the second seal comprises at least one second seal ring, and the third seal comprises at least one third seal ring.
In the expansion type staged fracturing process tubular column, the sealing ball seat comprises a top joint fixedly sleeved with the second end of the inner sleeve, a ball seat middle cavity fixedly sleeved with the top joint, a locking ring fixedly arranged at the second end of the ball seat middle cavity, a sealing sliding ring slidably sleeved on the inner side wall of the ball seat middle cavity, and an elastic supporting claw elastically abutted between the sealing sliding ring and the locking ring.
In the expansion type staged fracturing process tubular column, the middle part of the sealing sliding ring is provided with the conical hole, and the inner wall surface of the top joint protrudes out of the inner wall surface of the cavity in the ball seat to form a stopping part for stopping the sealing sliding ring.
In the expansion type staged fracturing process tubular column, a fixed retaining ring is clamped between the sealing slip ring and the elastic supporting claw, and a through hole for the elastic supporting claw to pass through is formed in the side wall of a middle cavity of the ball seat.
The other technical scheme adopted by the invention for solving the technical problem is as follows: the method for fracturing the expansion type staged fracturing process pipe column is based on the expansion type staged fracturing process pipe column and comprises the following steps:
connecting the string and the drilling tool, running the string into the wellbore, and adjusting the depth of the string so that the injector is aligned with the target zone;
pumping cleaning liquid into the pipe column through a drilling tool to clean the pipe column and the shaft;
dropping a sealing ball into the pipe string from the drilling tool;
dragging a drilling tool to drive a liquid outlet on an inner sleeve to move between a first sealing element and a second sealing element, wherein the inner sleeve is communicated with a pressure guide channel through the liquid outlet and the liquid inlet, pumping liquid into the pipe column through the drilling tool to enable a sealing ball to be in contact with a sealing ball seat to form sealing, and enabling the liquid to enter a first capsule expansion packer and a second capsule expansion packer through the pressure guide channel to enable the first capsule expansion packer and the second capsule expansion packer to be expanded and fixed in a shaft;
promote the liquid outlet that the drilling tool drove on the inner skleeve and remove outside first sealing member and the second sealing member, continue to pump into liquid to this tubular column through the drilling tool, liquid promotes the ball sealer and supports to push away the ball sealer and make the ball sealer open, and the ball sealer breaks away from the ball sealer, and the ball sealer gets into and connects a ball section of thick bamboo, and this sprayer and interior sleeve pipe intercommunication and jet liquid carry out fracturing construction.
The implementation of the expansion type staged fracturing process pipe column and the fracturing method has the following beneficial effects: when the expansion type staged fracturing technology tubular column is used, the tubular column and the drilling tool are connected, the tubular column is put into a shaft, and the depth of the tubular column is adjusted, so that the ejector is aligned to a target layer. And pumping cleaning liquid into the pipe column through the drilling tool to clean the pipe column and the shaft. A sealing ball is dropped into the string from the drilling tool. Drag the liquid outlet on the drilling tool drive inner skleeve and remove to between first sealing member and the second sealing member, the inner skleeve passes through liquid outlet and inlet intercommunication with the pressure guide channel, through the drilling tool to this tubular column internal pump annotate liquid for the ball sealer forms sealedly with the contact of sealed ball seat, and liquid makes first capsule inflation packer and the inflation of second capsule inflation packer and be fixed in the pit shaft through leading in pressure channel entering first capsule inflation packer and the inflation packer of second capsule. By using the tubular column, the expansion and retraction of the first capsule expansion packer and the second capsule expansion packer can be controlled in a mode of adjusting the telescopic assembly, so that the whole tubular column is effectively sealed. Promote the liquid outlet that the drilling tool drove on the inner skleeve and remove outside first sealing member and the second sealing member, continue to pump into liquid to this tubular column through the drilling tool, liquid promotes the ball sealer and supports to push away the ball sealer and make the ball sealer open, and the ball sealer breaks away from the ball sealer, and the ball sealer gets into and connects a ball section of thick bamboo, and this sprayer and interior sleeve pipe intercommunication and jet liquid carry out fracturing construction. After fracturing construction is accomplished, can stop the pump and annotate liquid, the position of adjustment flexible subassembly makes inlet and liquid outlet position relative, and the liquid in first capsule inflation packer and the second capsule inflation packer flows back to in the inner skleeve, and first capsule inflation packer and the second capsule inflation packer retract and loosen and seal and separate. At the moment, the position of the pipe column can be adjusted, and then the steps are repeated to continue fracturing construction.
Drawings
The invention will be further described with reference to the accompanying drawings and examples, in which:
FIG. 1 is a schematic diagram of the configuration of an expanding staged fracturing process string according to the present invention;
FIG. 2 is a schematic diagram of a first cross-sectional configuration of an expanding staged fracturing process string according to the present invention;
FIG. 3 is a schematic diagram of a second cross-sectional configuration of an expanding staged fracturing process string according to the present invention;
FIG. 4 is a schematic diagram of a telescoping assembly in an expandable staged fracturing process string according to the present invention;
FIG. 5 is a schematic cross-sectional view of a sealing ball seat in an expandable staged fracturing process string in accordance with the present invention;
fig. 6 is a schematic cross-sectional exploded view of a sealing ball seat in an expandable staged fracturing process string according to the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, embodiments of the present invention will be described in detail with reference to the accompanying drawings.
As shown in fig. 1 to 3, in the first embodiment of the expandable staged fracturing process string of the present invention, the string 100 comprises a pipe joint 2 for connecting with a drilling tool 1, a telescopic assembly 3 connected with the pipe joint 2, a first capsule expansion packer 4 connected with the telescopic assembly 3, an injector 5 connected with the first capsule expansion packer 4, a second capsule expansion packer 6 connected with the injector 5, and a ball receiving barrel 7 connected with the second capsule expansion packer 6, wherein the pipe joint 2, the telescopic assembly 3, the first capsule expansion packer 4, the injector 5, the second capsule expansion packer 6, and the ball receiving barrel 7 are sequentially connected and communicated, the telescopic assembly 3 comprises an outer sleeve 9 and an inner sleeve 8, the inner sleeve 8 is movably arranged in the outer sleeve 9, the outer sleeve 9 is provided with a pressure guide passage 10 capable of communicating with the first capsule expansion packer 4 and the second capsule expansion packer 6, a liquid inlet 11 communicated with the pressure guide channel 10 is arranged on the inner side wall of the outer sleeve 9, a liquid outlet 12 communicated with the inner part of the inner sleeve 8 is arranged on the side wall of the inner sleeve 8, a first sealing element 13 and a second sealing element 14 are arranged between the inner sleeve 8 and the outer sleeve 9 in a padding mode, the first sealing element 13 and the second sealing element 14 are fixedly arranged on the inner side wall of the outer sleeve 9 respectively and are located on two sides of the liquid inlet 11 respectively, the first end of the inner sleeve 8 is connected and communicated with the pipe joint 2, and a sealing ball seat 15 used for stopping a sealing ball 16 is arranged at the second end of the.
In using the expandable staged fracturing process string 100 of the present invention, the string 100 and the drilling tool 1 are connected, the string 100 is run into the wellbore, and the depth of the string 100 is adjusted so that the jets 5 are directed at the target zone. A cleaning fluid is pumped into the pipe string 100 through the drilling tool 1 to clean the pipe string 100 and the shaft. A sealing ball 16 is thrown into the pipe string 100 from the drilling tool 1. Dragging the drilling tool 1 to drive a liquid outlet 12 on the inner sleeve 8 to move to a position between a first sealing part 13 and a second sealing part 14, communicating the inner sleeve 8 and a pressure guide channel 10 through the liquid outlet 12 and a liquid inlet 11, pumping liquid into the pipe column 100 through the drilling tool 1, enabling a sealing ball 16 to be in contact with a sealing ball seat 15 to form sealing, and enabling the liquid to enter a first capsule expansion packer 4 and a second capsule expansion packer 6 through the pressure guide channel 10 to enable the first capsule expansion packer 4 and the second capsule expansion packer 6 to expand and be fixed in a shaft. By using the string 100, the expansion and retraction of the first capsule expansion packer 4 and the second capsule expansion packer 6 can be controlled by adjusting the telescoping assembly 3, thereby achieving effective packing of the entire string 100. Promote drilling tool 1 and drive liquid outlet 12 on the inner skleeve 8 and remove outside first sealing member 13 and second sealing member 14, continue to pump the liquid body in this tubular column 100 through drilling tool 1, liquid promotes sealing ball 16 and supports and pushes away sealing ball seat 15 and make sealing ball seat 15 open, and sealing ball 16 breaks away from sealing ball seat 15, and sealing ball 16 gets into and connects a ball section of thick bamboo 7, and this sprayer 5 and interior sleeve pipe intercommunication and jet liquid carry out fracturing construction. After fracturing construction is completed, pumping of liquid can be stopped, the position of the telescopic assembly 3 is adjusted to enable the liquid inlet 11 to be opposite to the liquid outlet 12, liquid in the first capsule expansion packer 4 and the second capsule expansion packer 6 flows back to the inner sleeve 8, and the first capsule expansion packer 4 and the second capsule expansion packer 6 retract and are loosened to be sealed. At this point, the position of the pipe string 100 can be adjusted, and then the steps are repeated to continue the fracturing operation.
Preferably, the pipe joint 2 is a safety joint to facilitate emergency disconnection of the drilling tool 1 and the pipe string 100, and when an accident such as drill sticking occurs in the downhole tool string, the pipe string 100 cannot be pulled out, and the safety joint can separate the drilling tool 1 from the pipe string 100 by means of ball throwing and pressing. It will be appreciated that the ball-receiving sleeve 7 is connected to and communicates with the second capsule expansion packer 6 at a first end and the ball-receiving sleeve 7 is closed at a second end.
In the present embodiment, there are two pressure guide channels 10, and the pressure guide channels 10 are disposed on the side wall of the outer sleeve 9.
As shown in fig. 4, the inner sleeve 8 is provided with a stopper 17 protruding from an outer wall surface of the inner sleeve 8, and the inner wall surface of the outer sleeve 9 is provided with a stopper groove 18 for limiting a sliding range of the stopper 17. When the drill 1 is dragged to drive the inner sleeve 8 to slide in the outer sleeve 9, the limiting part 17 on the inner sleeve 8 can only move in the limiting groove 18.
Further, a third sealing element 19 is fixedly arranged on the inner side wall of the outer sleeve 9, and the first sealing element 13, the second sealing element 14 and the third sealing element 19 are sequentially arranged on the inner side wall of the outer sleeve 9.
Specifically, when the limiting member 17 slides to the first end of the limiting groove 18, the liquid outlet 12 is located between the first sealing member 13 and the second sealing member 14; when the limiting member 17 slides to the second end of the limiting groove 18, the liquid outlet 12 is located between the second sealing member 14 and the third sealing member 19.
Preferably, the first seal 13 comprises at least one first sealing ring, the second seal 14 comprises at least one second sealing ring, and the third seal 19 comprises at least one third sealing ring.
In the present embodiment, the first seal 13 is preferably two first seal rings, the second seal 14 is preferably two second seal rings, and the third seal 19 is preferably two third seal rings.
Preferably, the inner side wall of the outer sleeve 9 is provided with an annular groove for fixedly embedding and accommodating the first sealing ring, the second sealing ring and the third sealing ring, and the first sealing ring, the second sealing ring and the third sealing ring are respectively fixed in the annular groove.
As shown in fig. 5 and 6, the sealing ball seat 15 includes a top connector 20 fixedly connected to the second end of the inner sleeve 8, a ball seat cavity 21 fixedly connected to the top connector 20, a locking ring 22 fixedly disposed at the second end of the ball seat cavity 21, a sealing slip ring 23 slidably disposed on the inner sidewall of the ball seat cavity 21, and an elastic support claw 24 elastically abutting between the sealing slip ring 23 and the locking ring 22.
Furthermore, a conical hole 25 is formed in the middle of the sealing slip ring 23, and the inner wall surface of the top adapter 20 protrudes from the inner wall surface of the ball seat middle cavity 21 to form a stopping portion 26 for stopping the sealing slip ring 23. A fixed retaining ring 27 is clamped between the sealing slip ring 23 and the elastic supporting claw 24, and a through hole 28 for the elastic supporting claw 24 to pass through is formed on the side wall of the ball seat middle cavity 21.
When the liquid outlet 12 slides to a position between the second sealing element 14 and the third sealing element 19, the liquid outlet 12 is no longer communicated with the pressure guide channel 10, pressure is continuously injected into the inner sleeve 8, the sealing ring is pushed to push the sealing slide ring 23 by hydraulic pressure, the sealing slide ring 23 is pushed to push the elastic supporting claw 24 by fixed blocking, the elastic supporting claw 24 expands, the sealing ball seat 15 is opened, and the sealing ball 16 falls from the sealing ball seat 15 and enters the ball receiving cylinder 7.
In another embodiment of the present invention, there is provided a method for fracturing an expandable staged fracturing process string 100, the method for fracturing being based on the expandable staged fracturing process string 100 described above, the method for fracturing comprising:
s101, connecting the string 100 and the drilling tool 1, running the string 100 into the wellbore, and adjusting the depth of the string 100 so that the injector 5 is directed at the target zone.
S102, a cleaning fluid is pumped into the string 100 through the drilling tool 1, and the string 100 and the shaft are cleaned.
S103, the seal ball 16 is put into the string 100 from the drill 1.
S104, the drilling tool 1 is dragged to drive the liquid outlet 12 on the inner sleeve 8 to move to a position between the first sealing part 13 and the second sealing part 14, the inner sleeve 8 is communicated with the pressure guide channel 10 through the liquid outlet 12 and the liquid inlet 11, liquid is pumped into the pipe column 100 through the drilling tool 1, the sealing ball 16 is in contact with the sealing ball seat 15 to form sealing, and the liquid enters the first capsule expansion packer 4 and the second capsule expansion packer 6 through the pressure guide channel 10 to enable the first capsule expansion packer 4 and the second capsule expansion packer 6 to expand and be fixed in a shaft.
S105, the drilling tool 1 is pushed to drive the liquid outlet 12 on the inner sleeve 8 to move to the outside of the first sealing piece 13 and the second sealing piece 14, liquid is pumped into the pipe column 100 continuously through the drilling tool 1, the liquid pushes the sealing ball 16 to push the sealing ball seat 15 and open the sealing ball seat 15, the sealing ball 16 is separated from the sealing ball seat 15, the sealing ball 16 enters the ball receiving barrel 7, and the ejector 5 is communicated with the inner sleeve and ejects liquid to perform fracturing construction.
Further, after fracturing construction is completed, pumping of liquid can be stopped, the position of the telescopic assembly 3 is adjusted to enable the liquid inlet 11 to be opposite to the liquid outlet 12, liquid in the first capsule expansion packer 4 and the second capsule expansion packer 6 flows back into the inner sleeve 8, and the first capsule expansion packer 4 and the second capsule expansion packer 6 retract and are separated in a loosening mode. At this time, the position of the pipe string 100 can be adjusted, and then the steps S101 to S105 are repeated to continue the fracturing construction.
After the construction is completed, the string 100 is lifted out, and the wellbore is cleaned, completing the fracturing construction.
In addition, in the present invention, unless otherwise expressly specified or limited, the terms "connected," "stacked," and the like are to be construed broadly, e.g., as meaning permanently connected, detachably connected, or integrally formed; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
The above description is only an embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes performed by the present specification and drawings, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.
Claims (10)
1. The expansion type staged fracturing process pipe column is characterized in that the pipe column (100) comprises a pipe joint (2) used for being connected with a drilling tool (1), a telescopic assembly (3) connected with the pipe joint (2), a first capsule expansion packer (4) connected with the telescopic assembly (3), an ejector (5) connected with the first capsule expansion packer (4), a second capsule expansion packer (6) connected with the ejector (5), and a ball receiving barrel (7) connected with the second capsule expansion packer (6), wherein the pipe joint (2), the telescopic assembly (3), the first capsule expansion packer (4), the ejector (5), the second capsule expansion packer (6) and the ball receiving barrel (7) are sequentially connected and communicated, the telescopic assembly (3) comprises an outer sleeve (9) and an inner sleeve (8), the inner sleeve (8) is movably arranged in the outer sleeve (9), the outer sleeve (9) is provided with a pressure guide channel (10) which can be communicated with the first capsule expansion packer (4) and the second capsule expansion packer (6), a liquid inlet (11) communicated with the pressure guide channel (10) is arranged on the inner side wall of the outer sleeve (9), a liquid outlet (12) communicated with the inner part of the inner sleeve (8) is arranged on the side wall of the inner sleeve (8), a first sealing element (13) and a second sealing element (14) are arranged between the inner sleeve (8) and the outer sleeve (9) in a cushioning manner, the first sealing element (13) and the second sealing element (14) are respectively and fixedly arranged on the inner side wall of the outer sleeve (9) and are respectively positioned at two sides of the liquid inlet (11), the first end of the inner sleeve (8) is connected and communicated with the pipe joint (2), and a sealing ball seat (15) for stopping the sealing ball (16) is arranged at the second end of the inner sleeve (8).
2. The expandable staged fracturing process string according to claim 1, wherein the pipe joint (2) is a safety joint, the first end of the ball receiving cylinder (7) is connected and communicated with the second capsule expansion packer (6), and the second end of the ball receiving cylinder (7) is closed.
3. The expandable staged fracturing string as claimed in claim 1, wherein the number of the pressure guide channels (10) is two, and the pressure guide channels (10) are arranged on the side wall of the outer sleeve (9).
4. The expandable staged fracturing process string according to claim 1, wherein a limiting piece (17) protruding from the outer wall surface of the inner sleeve (8) is arranged on the inner sleeve (8), and a limiting groove (18) for limiting the sliding range of the limiting piece (17) is arranged on the inner wall surface of the outer sleeve (9).
5. The expandable staged fracturing string as recited in claim 4, wherein a third seal (19) is further fixed on the inner side wall of the outer sleeve (9), and the first seal (13), the second seal (14) and the third seal (19) are sequentially arranged on the inner side wall of the outer sleeve (9);
when the limiting piece (17) slides to the first end of the limiting groove (18), the liquid outlet (12) is positioned between the first sealing piece (13) and the second sealing piece (14); when the limiting piece (17) slides to the second end of the limiting groove (18), the liquid outlet (12) is located between the second sealing piece (14) and the third sealing piece (19).
6. The expandable staged fracturing string according to claim 5, wherein the first seal (13) comprises at least one first seal ring, the second seal (14) comprises at least one second seal ring, and the third seal (19) comprises at least one third seal ring.
7. The expandable staged fracturing process string according to claim 1, wherein the sealing ball seat (15) comprises a top joint (20) fixedly sleeved with the second end of the inner sleeve (8), a ball seat middle cavity (21) fixedly sleeved with the top joint (20), a locking ring (22) fixedly arranged at the second end of the ball seat middle cavity (21), a sealing slide ring (23) slidably sleeved on the inner side wall of the ball seat middle cavity (21), and an elastic support claw (24) elastically abutted between the sealing slide ring (23) and the locking ring (22).
8. The expansion type staged fracturing process string as claimed in claim 7, wherein a conical hole (25) is formed in the middle of the sealing slip ring (23), and the inner wall surface of the top joint (20) protrudes out of the inner wall surface of the ball seat middle cavity (21) to form a stopping part (26) for stopping the sealing slip ring (23).
9. The expandable staged fracturing string as claimed in claim 8, wherein a fixed retaining ring (27) is clamped between the sealing slide ring (23) and the elastic support claw (24), and a through hole (28) for the elastic support claw (24) to pass through is arranged on the side wall of the ball seat middle cavity (21).
10. An expansion type staged fracturing process pipe column fracturing method, which is based on any one of the expansion type staged fracturing process pipe columns 1-9, is characterized by comprising the following steps:
connecting the string (100) and the drilling tool (1), running the string (100) into the wellbore, and adjusting the depth of the string (100) so that the injector (5) is directed at the target zone;
pumping cleaning fluid into the pipe column (100) through the drilling tool (1) to clean the pipe column (100) and a shaft;
-dropping a sealing ball (16) from the drilling tool (1) into the string (100);
dragging a drilling tool (1) to drive a liquid outlet (12) on an inner sleeve (8) to move to a position between a first sealing element (13) and a second sealing element (14), wherein the inner sleeve (8) is communicated with a pressure guide channel (10) through the liquid outlet (12) and a liquid inlet (11), pumping liquid into the pipe column (100) through the drilling tool (1), so that a sealing ball (16) is in contact with a sealing ball seat (15) to form sealing, and the liquid enters a first capsule expansion packer (4) and a second capsule expansion packer (6) through the pressure guide channel (10) to enable the first capsule expansion packer (4) and the second capsule expansion packer (6) to be expanded and fixed in a shaft;
promote drilling tool (1) and drive liquid outlet (12) on inner skleeve (8) and remove outside first sealing member (13) and second sealing member (14), continue to pump liquid in tubular column (100) through drilling tool (1), liquid promotion ball sealer (16) support and push away sealing ball seat (15) and make sealing ball seat (15) open, ball sealer (16) break away from sealing ball seat (15), ball sealer (16) get into and receive a ball section of thick bamboo (7), sprayer (5) and interior sleeve pipe intercommunication and jet liquid carry out fracturing construction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110153899.0A CN112814639A (en) | 2021-02-04 | 2021-02-04 | Expansion type staged fracturing process pipe column and fracturing method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110153899.0A CN112814639A (en) | 2021-02-04 | 2021-02-04 | Expansion type staged fracturing process pipe column and fracturing method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112814639A true CN112814639A (en) | 2021-05-18 |
Family
ID=75861220
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110153899.0A Pending CN112814639A (en) | 2021-02-04 | 2021-02-04 | Expansion type staged fracturing process pipe column and fracturing method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112814639A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113494264A (en) * | 2021-07-09 | 2021-10-12 | 中煤科工集团西安研究院有限公司 | Water-resisting layer reinforced grouting transformation device and method based on staged fracturing |
| CN113719264A (en) * | 2021-09-09 | 2021-11-30 | 中国石油化工股份有限公司 | Fracturing device for realizing high-efficiency supporting of compact reservoir volume fracturing |
| CN113846972A (en) * | 2021-10-26 | 2021-12-28 | 国能神东煤炭集团有限责任公司 | Hole expanding device and hole expanding method |
| CN114370272A (en) * | 2021-12-30 | 2022-04-19 | 中矿科创(北京)煤炭技术有限公司 | Directional hydraulic top cutting method and device |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4823882A (en) * | 1988-06-08 | 1989-04-25 | Tam International, Inc. | Multiple-set packer and method |
| US20100132954A1 (en) * | 2007-03-31 | 2010-06-03 | Specialised Petroleum Services Group Limited | Ball seat assembly and method of controlling fluid flow through a hollow body |
| US20160168956A1 (en) * | 2013-02-25 | 2016-06-16 | Baker Hughes Incorporated | Actuation mechanisms for downhole assemblies and related downhole assemblies and methods |
| CN207229085U (en) * | 2017-09-29 | 2018-04-13 | 华鼎鸿基石油工程技术(北京)有限公司 | Without throttling dual channel straddle test tubing string |
| CN108166965A (en) * | 2018-02-27 | 2018-06-15 | 中国石油集团渤海钻探工程有限公司 | A kind of abrasive perforating, pressure break and packing integrated apparatus |
| CN208040345U (en) * | 2018-04-16 | 2018-11-02 | 大庆市地油石油机械有限公司 | The inflatable packer of stepped setting |
| CN214576949U (en) * | 2021-02-04 | 2021-11-02 | 广州海洋地质调查局 | Expansion type staged fracturing process pipe column |
-
2021
- 2021-02-04 CN CN202110153899.0A patent/CN112814639A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4823882A (en) * | 1988-06-08 | 1989-04-25 | Tam International, Inc. | Multiple-set packer and method |
| US20100132954A1 (en) * | 2007-03-31 | 2010-06-03 | Specialised Petroleum Services Group Limited | Ball seat assembly and method of controlling fluid flow through a hollow body |
| US20160168956A1 (en) * | 2013-02-25 | 2016-06-16 | Baker Hughes Incorporated | Actuation mechanisms for downhole assemblies and related downhole assemblies and methods |
| CN207229085U (en) * | 2017-09-29 | 2018-04-13 | 华鼎鸿基石油工程技术(北京)有限公司 | Without throttling dual channel straddle test tubing string |
| CN108166965A (en) * | 2018-02-27 | 2018-06-15 | 中国石油集团渤海钻探工程有限公司 | A kind of abrasive perforating, pressure break and packing integrated apparatus |
| CN208040345U (en) * | 2018-04-16 | 2018-11-02 | 大庆市地油石油机械有限公司 | The inflatable packer of stepped setting |
| CN214576949U (en) * | 2021-02-04 | 2021-11-02 | 广州海洋地质调查局 | Expansion type staged fracturing process pipe column |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113494264A (en) * | 2021-07-09 | 2021-10-12 | 中煤科工集团西安研究院有限公司 | Water-resisting layer reinforced grouting transformation device and method based on staged fracturing |
| CN113719264A (en) * | 2021-09-09 | 2021-11-30 | 中国石油化工股份有限公司 | Fracturing device for realizing high-efficiency supporting of compact reservoir volume fracturing |
| CN113719264B (en) * | 2021-09-09 | 2023-02-07 | 中国石油化工股份有限公司 | Realize fracturing unit of high-efficient support of tight reservoir volume fracturing |
| CN113846972A (en) * | 2021-10-26 | 2021-12-28 | 国能神东煤炭集团有限责任公司 | Hole expanding device and hole expanding method |
| CN113846972B (en) * | 2021-10-26 | 2023-08-11 | 国能神东煤炭集团有限责任公司 | Reaming device and reaming method |
| CN114370272A (en) * | 2021-12-30 | 2022-04-19 | 中矿科创(北京)煤炭技术有限公司 | Directional hydraulic top cutting method and device |
| CN114370272B (en) * | 2021-12-30 | 2024-05-07 | 中矿科创(北京)煤炭技术有限公司 | Directional hydraulic roof cutting method and device thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN112814639A (en) | Expansion type staged fracturing process pipe column and fracturing method | |
| US10337297B2 (en) | Downhole method and apparatus | |
| US8312921B2 (en) | Method and apparatus for selective treatment of a perforated casing | |
| US7004248B2 (en) | High expansion non-elastomeric straddle tool | |
| CA3065156A1 (en) | Downhole patch setting tool | |
| MXPA05000551A (en) | Wellbore sealing system and method. | |
| CN103392050A (en) | Downhole tools | |
| US20140216754A1 (en) | Fracpoint optimization using icd technology | |
| AU2015279426B2 (en) | Downhole stimulation system | |
| CN115324550B (en) | Hydraulic coiled tubing dragging fracturing tool and technological method | |
| CN214576949U (en) | Expansion type staged fracturing process pipe column | |
| CN112267864A (en) | Repeated fracturing device and method for large-displacement horizontal well | |
| US6390196B1 (en) | Method and apparatus for completing a well for producing hydrocarbons or the like | |
| CN110017127B (en) | Acid fracturing water control integrated device, acid fracturing water control pipe column and acid fracturing water control method | |
| CN108952665B (en) | Hydraulic slotting device of semi-submersible drilling platform or drilling ship | |
| GB2418690A (en) | Expansion device | |
| CN113006750B (en) | Construction tool and method for improving recovery ratio of low-permeability reservoir horizontal well | |
| CN114183076B (en) | Hydraulic jet drilling pipe column and hydraulic jet drilling method | |
| WO2014207086A1 (en) | Downhole annular base structure | |
| CN114320215A (en) | Hydraulic internal pressurization packer with expansion joint | |
| CN207131368U (en) | One kind packing bridge blinding bunch tube | |
| EP3472426B1 (en) | Fracturing method using in situ fluid | |
| CN116988754A (en) | Underground slotted pipe column and method for making micro-cracks by stratum | |
| NO347014B1 (en) | Well tool device with injection fluid system | |
| CN118088168A (en) | Reservoir transformation method and system for in-situ leaching production well |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |