CN110067527B - Downhole sealing cylinder repairing tool - Google Patents
Downhole sealing cylinder repairing tool Download PDFInfo
- Publication number
- CN110067527B CN110067527B CN201910508364.3A CN201910508364A CN110067527B CN 110067527 B CN110067527 B CN 110067527B CN 201910508364 A CN201910508364 A CN 201910508364A CN 110067527 B CN110067527 B CN 110067527B
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- sealing
- central tube
- piston
- cylinder
- assembly
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- 238000007789 sealing Methods 0.000 title claims abstract description 188
- 239000007788 liquid Substances 0.000 claims abstract description 64
- 230000008439 repair process Effects 0.000 claims abstract description 40
- 239000003292 glue Substances 0.000 claims abstract description 23
- 230000000712 assembly Effects 0.000 claims abstract description 13
- 238000000429 assembly Methods 0.000 claims abstract description 13
- 230000000903 blocking effect Effects 0.000 claims abstract description 6
- 230000009471 action Effects 0.000 claims abstract description 5
- 229920001971 elastomer Polymers 0.000 claims description 52
- 239000004568 cement Substances 0.000 claims description 17
- 239000012530 fluid Substances 0.000 claims description 9
- 238000003825 pressing Methods 0.000 claims description 5
- 238000010276 construction Methods 0.000 claims 2
- 230000000694 effects Effects 0.000 abstract description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 8
- 239000000853 adhesive Substances 0.000 description 7
- 230000001070 adhesive effect Effects 0.000 description 7
- 239000003129 oil well Substances 0.000 description 7
- 238000002347 injection Methods 0.000 description 5
- 239000007924 injection Substances 0.000 description 5
- 238000012423 maintenance Methods 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 4
- 239000004576 sand Substances 0.000 description 3
- 229910000639 Spring steel Inorganic materials 0.000 description 2
- 239000002981 blocking agent Substances 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 238000002955 isolation Methods 0.000 description 2
- 239000010410 layer Substances 0.000 description 2
- 238000005065 mining Methods 0.000 description 2
- 229920002635 polyurethane Polymers 0.000 description 2
- 239000004814 polyurethane Substances 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005465 channeling Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 239000011229 interlayer Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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
- E21B23/00—Apparatus for displacing, setting, locking, releasing or removing tools, packers or the like in boreholes or wells
- E21B23/08—Introducing or running tools by fluid pressure, e.g. through-the-flow-line tool systems
- E21B23/10—Tools specially adapted therefor
-
- 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
Landscapes
- 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)
- Pistons, Piston Rings, And Cylinders (AREA)
- Working Measures On Existing Buildindgs (AREA)
Abstract
The invention provides a repair tool for an underground sealing cylinder, which relates to the technical field of oilfield equipment and comprises a central tube; the sealing assemblies are at least two groups of the sealing assemblies, sleeved outside the central tube and respectively positioned at two sides of the liquid glue repairing assembly; the maximum outer diameter of the sealing component can be enlarged under the action of external force so as to seal the annular space between the central tube and the inner sealing surface of the sealing cylinder; and the liquid glue repairing assembly is sleeved outside the central tube, an annular cavity is formed in the liquid glue repairing assembly, a first piston is arranged in the annular cavity, a first cavity on one side of the first piston is communicated with the inside of the central tube through a first through hole, a second cavity on the other side of the first piston is communicated with the annular space through a discharge hole, and a blocking piece which is opened under pressure is arranged at the discharge hole. The technical effect of low well repair cost is achieved.
Description
Technical Field
The invention relates to the technical field of oilfield equipment, in particular to a downhole sealing cylinder repairing tool.
Background
With the continuous progress and development of oilfield development technology, for old wells for many years during production and water injection, the underground sealing cylinder is greatly damaged due to the fact that the underground sealing cylinder is pulled down to be matched with the sealing rod for sealing, so that interlayer isolation and oil jacket isolation are impossible. When mining and water injection, separate mining and separate water injection are needed, and in order to achieve fine production and water injection, the oil layers and the oil jackets are required to be isolated. For a new well, the inner sealing surface of the sealing cylinder on the external sand control pipe column is complete and has no damage, and the sealing rod is sealed reliably, but for an old well which is produced or filled with water for several years, the underground sealing cylinder is started and started, the sealing surface of the sealing cylinder of the inner sealing surface of the sealing cylinder generates ravines, the sealing effect can not be achieved by matching with the traditional sealing rod, and well control risks can be generated due to sealing leakage.
When the sand control pipe column works underground for a long time, the production pipe column passing through the sealing barrel can damage the inner sealing surface of the sealing barrel for a certain time, after passing through the sealing barrel for many times, the inner sealing surface of the sealing barrel is scratched, sealing cannot be formed with the sealing rod, a channeling layer is formed when oil extraction and water injection are caused, and when the sealing barrel at the top cannot form sealing with the sealing rod, the annular space of an oil sleeve can be pressurized, and well control risks are generated. When the well control risk occurs, the well is shut down or overhauled, a sand control pipe column is started, and the well completion operation is performed again, so that higher well repairing cost is generated.
Accordingly, providing a downhole seal cartridge repair tool that reduces workover costs is an important technical problem to be solved by those skilled in the art.
Disclosure of Invention
The invention aims to provide a downhole sealing cylinder repairing tool which is used for solving the technical problem that the cost for repairing the inner sealing surface of a sealing cylinder is high in the prior art.
The embodiment of the invention provides a downhole sealing cylinder repairing tool, which comprises a central tube;
the sealing assemblies are at least two groups of the sealing assemblies, sleeved outside the central tube and respectively positioned at two sides of the liquid glue repairing assembly; the maximum outer diameter of the sealing assembly can be increased under the action of external force so as to seal the annular space between the central tube and the inner sealing surface of the sealing cylinder;
and the liquid glue repairing assembly is sleeved outside the central tube, an annular cavity is formed in the liquid glue repairing assembly, a first piston is arranged in the annular cavity, a first cavity on one side of the first piston is communicated with the inside of the central tube through a first through hole, a second cavity on the other side of the first piston is communicated with the annular space through a discharge hole, and a blocking piece which is opened under pressure is arranged at the discharge hole.
The ninth possible implementation manner provided by the embodiment of the present invention, wherein the liquid glue repairing assembly includes a liquid glue cylinder sleeved outside the central tube, and the annular cavity is formed between an inner wall of the liquid glue cylinder and an outer wall of the central tube;
the outer wall of the central tube is fixedly provided with a first sealing ring table for sealing the top of the liquid rubber cylinder and a second sealing ring table for sealing the bottom of the liquid rubber cylinder.
A ninth possible implementation manner provided by the embodiment of the present invention, wherein the plugging piece adopts a rupture disc, and the rupture disc is located in the discharge port;
the discharge hole is a stepped hole, and a fixing sleeve for pressing the rupture disc is arranged in the discharge hole;
the outer wall of the fixed sleeve is in threaded connection with the inner wall of the discharge hole.
The ninth possible implementation manner provided by the embodiment of the present invention, wherein the sealing assemblies are provided with two groups, namely, a first sealing assembly and a second sealing assembly, which are respectively located above and below the liquid glue repairing assembly;
the first sealing assembly comprises a first hydraulic cylinder, a second piston, a first thrust sleeve and a first rubber cylinder which are sequentially arranged from top to bottom;
the top end of the first hydraulic cylinder is in sealing connection with the upper joint, the second piston is positioned between the first hydraulic cylinder and the central pipe, and the bottom end of the first rubber cylinder is in abutting connection with the first sealing ring table;
the central tube is provided with a second through hole, and liquid in the central tube can drive the second piston to move after passing through the second through hole so as to extrude the first rubber cylinder.
A ninth possible implementation manner provided by the embodiment of the present invention, wherein a first locking ring for preventing the first thrust sleeve from moving towards the second piston is disposed between the second piston and the first thrust sleeve;
the center tube outer wall is provided with first latch, first catch inner wall is provided with the second latch, the extending direction of first latch is towards first thrust collar, the extending direction of second latch is towards the top connection.
The ninth possible implementation manner provided by the embodiment of the present invention, wherein the second sealing assembly includes a second hydraulic cylinder, and a third piston, a second thrust sleeve and a second rubber sleeve sequentially arranged from bottom to top;
the top end of the second hydraulic cylinder is in sealing connection with the lower joint, the third piston is positioned between the second hydraulic cylinder and the central pipe, and the bottom end of the second rubber cylinder is in abutting connection with the second sealing ring table;
the central tube is provided with a third through hole, and liquid in the central tube can drive the third piston to move after passing through the third through hole so as to extrude the second rubber cylinder.
A sixth possible implementation manner provided by the embodiment of the present invention, wherein a second locking ring for preventing the second thrust sleeve from moving towards the third piston is disposed between the third piston and the second thrust sleeve;
the outer wall of the central tube is provided with a third latch, the inner wall of the second locking ring is provided with a fourth latch, the extending direction of the third latch faces the second thrust sleeve, and the extending direction of the fourth latch faces the lower joint.
According to a seventh possible implementation manner provided by the embodiment of the present invention, the second piston is connected to the first hydraulic cylinder through a pin, the third piston is connected to the second hydraulic cylinder through a pin, and the shear strength of the pin is smaller than the maximum compression strength of the rupture disc.
The eighth possible implementation manner provided by the embodiment of the present invention, wherein the central tube includes a first central tube, a second central tube and a third central tube that are sequentially connected in a sealing manner from top to bottom;
the first central tube is connected with the upper joint, and the third central tube is connected with the lower joint;
the first sealing ring table is fixedly arranged on the outer wall of the second central tube, and the second sealing ring table is fixedly arranged on the outer wall of the third central tube.
According to a ninth possible implementation manner provided by the embodiment of the present invention, the first central tube, the second central tube and the third central tube are in an integrated structure.
The beneficial effects are that:
the embodiment of the invention provides a downhole sealing cylinder repairing tool, which comprises a central tube; the sealing assemblies are at least two groups of the sealing assemblies, sleeved outside the central tube and respectively positioned at two sides of the liquid glue repairing assembly; the maximum outer diameter of the sealing assembly can be enlarged under the action of external force so as to seal the annular space between the central tube and the inner sealing surface of the oil well sealing cylinder; and the liquid glue repairing assembly is sleeved outside the central tube, an annular cavity is formed in the liquid glue repairing assembly, a first piston is arranged in the annular cavity, a first cavity on one side of the first piston is communicated with the inside of the central tube through a first through hole, a second cavity on the other side of the first piston is communicated with the space through a discharge hole, and a blocking piece which is opened under pressure is arranged at the discharge hole.
When the sealing operation is required, a worker presses the inside of the central pipe, so that liquid in the central pipe can drive the sealing assembly to work, the maximum outer diameter of the sealing assembly is enlarged, and the sealing assembly can perform pre-sealing operation on an annular space between the sealing surface in the sealing cylinder and the central pipe; then staff improves the pressure of the liquid in the center tube for liquid in the center tube is glued and is restoreed the subassembly and begin to work, liquid in the center tube flows into first cavity in through first through-hole, then promote first piston and remove, make first piston can exert pressure to the restoration glue, thereby make the shutoff piece on the discharge gate open, then first piston promotes restoration glue and flows to the annular space from the discharge gate, and through the blocking of upper and lower seal assembly, can effectually avoid the restoration glue that liquid glue restoration subassembly released to flow and lose, make restoration glue can be full of the space between upper and lower seal assembly, and restoration glue can restore the gully on the sealing face in the sealing cylinder, make the inner wall of sealing face in the sealing cylinder can realize sealedly with seal assembly, thereby accomplish the sealing of annular space between sealing face in the sealing cylinder and the center tube, consequently, need not the staff and promote the sealing cylinder to the earth's surface and restore, reduce cost of maintenance.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are needed in the description of the embodiments or the prior art will be briefly described, and it is obvious that the drawings in the description below are some embodiments of the present invention, and other drawings can be obtained according to the drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of the overall structure of a downhole seal cartridge repair tool according to an embodiment of the present invention;
FIG. 2 is a partial schematic view of an upper portion of a downhole seal cartridge repair tool according to an embodiment of the present invention;
FIG. 3 is a partial enlarged view at B in FIG. 2;
FIG. 4 is a partial schematic view of a middle portion of a downhole seal cartridge repair tool according to an embodiment of the present invention;
FIG. 5 is an enlarged view of a portion of FIG. 4 at A;
FIG. 6 is a partial schematic view of the lower portion of a downhole seal cartridge repair tool provided in an embodiment of the invention;
FIG. 7 is an enlarged view of a portion of FIG. 6 at C;
FIG. 8 is a schematic illustration of a first locking ring in a downhole seal cartridge repair tool according to an embodiment of the present invention;
FIG. 9 is a schematic illustration of a second locking ring in a downhole seal cartridge repair tool according to an embodiment of the present invention.
Icon:
100-upper joint; 200-lower joint;
310-a first central tube; 301-a first sealing ring table; 302-a second sealing ring table; 311-a second through hole; 312-first latch; 320-a second central tube; 321-a first through hole; 330-a third center tube; 331-a third through hole; 332-third latch;
400-liquid glue repairing assembly; 410-a liquid rubber cylinder; 411-a discharge hole; 420-a first piston; 430-rupture disc; 440-repairing glue; 450-fixing sleeve;
500-a first seal assembly; 510-a first hydraulic cylinder; 520-a second piston; 530-a first thrust collar; 540-a first rubber cylinder; 550-a first locking ring; 551-first gap; 560-second latch;
600-a second seal assembly; 610-a second hydraulic cylinder; 620-a third piston; 630-a second thrust sleeve; 640-a second rubber cylinder; 650-a second lock ring; 651-second gap; 660-fourth latch;
700-pins.
Detailed Description
The following description of the embodiments of the present invention will be made apparent and fully in view of the accompanying drawings, in which some, but not all embodiments of the invention are shown. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
In the description of the present invention, it should be understood that the directions or positional relationships indicated by the terms "center", "upper", "lower", "top", "bottom", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present invention and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present invention.
Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present invention, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.
In the present invention, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly and include, for example, either fixedly attached, detachably attached, or integrally formed; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the 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.
The invention will now be described in further detail by way of specific examples of embodiments in connection with the accompanying drawings.
Referring to FIGS. 1-7, an embodiment of the present invention provides a downhole seal cartridge repair tool comprising a base pipe; the sealing assemblies are at least two groups of sealing assemblies, sleeved outside the central tube and respectively positioned at two sides of the liquid cement repairing assembly 400; the maximum outer diameter of the sealing component can be enlarged under the action of external force so as to seal the annular space between the central tube and the inner sealing surface of the sealing cylinder; the liquid cement restoration assembly 400 is sleeved outside the central pipe, an annular cavity is formed in the liquid cement restoration assembly, a first piston 420 is arranged in the annular cavity, a first cavity on one side of the first piston 420 is communicated with the inside of the central pipe through a first through hole 321, a second cavity on the other side of the first piston 420 is communicated with the annular space through a discharge hole 411, and the discharge hole 411 is provided with a plugging piece which is opened under pressure;
when the sealing operation is required, a worker presses the inside of the central pipe, so that liquid in the central pipe can drive the sealing assembly to work, the maximum outer diameter of the sealing assembly is enlarged, and the sealing assembly can perform pre-sealing operation on an annular space between the sealing surface in the sealing cylinder and the central pipe; then staff improves the pressure of the liquid in the center tube for the liquid cement restoration subassembly 400 begins to work, liquid in the center tube flows into first cavity from the center tube through first through hole 321, then promote first piston 420 and remove, make first piston 420 can exert pressure on restoration rubber 440, thereby make the shutoff piece on the discharge gate 411 open, then first piston 420 promotes restoration rubber 440 and flows to the annular space from the discharge gate 411 in, and through the blocking of upper and lower seal assembly, can effectually avoid the restoration rubber 440 that the liquid cement restoration subassembly released to flow out, make restoration rubber 440 can be full of the space between upper and lower seal assembly, and restoration rubber 440 can restore the gully on the seal face in the seal cylinder, make the inner wall of seal face in the seal cylinder can realize sealedly with seal assembly, thereby accomplish the seal of seal face in the seal cylinder and annular space between the center tube, consequently, the staff is not required to promote the seal cylinder to the earth's surface and restore, reduce maintenance cost.
In the practical and practical process of the prior art, scratches and ravines can appear on the sealing surface in the sealing cylinder along with the increase of the service time, in the prior art, the sealing cylinder of the oil well casing is put forward to the outside, and then repair or replacement is carried out by staff, so that the maintenance time is long, and the maintenance cost is high. The downhole sealing cylinder repairing tool provided by the embodiment can complete sealing operation even if scratches and ravines appear on the inner wall of the sealing cylinder of the oil well casing when sealing the sealing cylinder of the oil well casing, and can repair the inner wall of the sealing cylinder of the oil well casing.
It should be noted that, the annular cavity is a space between the first hydraulic cylinder 510 and the second center tube 320, the first cavity is a space between the first piston 420 and the third center tube 330 (the second sealing ring platform 302), and the second cavity is a space between the first piston 420 and the first sealing ring platform 301; and before work, the worker fills the second cavity with repair gel 440.
Referring to fig. 1, in an alternative of the present embodiment, the central tube includes a first central tube 310, a second central tube 320, and a third central tube 330, which are hermetically connected in sequence from top to bottom; the first center tube 310 is connected to the upper joint 100, and the third center tube 330 is connected to the lower joint 200.
The center tubes are arranged into the first center tube 310, the second center tube 320 and the third center tube 330, so that the assembly of the underground sealing cylinder can be facilitated; and in the processing and manufacturing process, the requirement of flatness or other characteristics of the central tube can be met more easily.
Specifically, the outer wall of the first central tube 310 is screwed with the inner wall of the upper joint 100, and a sealing ring is disposed between the first central tube 310 and the upper joint 100.
An inner wall of one end of the second central tube 320 is in threaded connection with an outer wall of one end of the first central tube 310, which is far away from the upper joint 100, and a sealing ring is arranged between the first central tube 310 and the second central tube 320. The outer wall of the other end of the second central tube 320 is in threaded connection with the inner wall of the third central tube 330, and a sealing ring is arranged between the second central tube 320 and the third central tube 330.
An outer wall of an end of the third central tube 330 remote from the second central tube 320 is screw-coupled with the lower joint 200, and a sealing ring is provided between the third central tube 330 and the lower joint 200.
And, the second center tube 320 is provided with a first sealing ring stage 301 for supporting and sealing the sealing assembly at the outer wall.
The third center tube 330 is provided with a second sealing ring land 302 on the outer wall for supporting and sealing the seal assembly.
Referring to fig. 4 and 5, in an alternative version of the present embodiment, a fluid paste repair assembly 400 includes a fluid paste cylinder 410, a first piston 420, a rupture disc 430, and a repair paste 440; the liquid rubber cylinder 410 is sleeved outside the second central tube 320, one end of the liquid rubber cylinder 410 is connected with the second central tube 320 in a sealing way, and the other end of the liquid rubber cylinder 410 is connected with the third central tube 330 in a sealing way; an annular cavity is reserved between the liquid rubber cylinder 410 and the second central tube 320, the first piston 420 is arranged in the annular cavity, the first piston 420 divides the annular cavity into a first cavity and a second cavity, the second cavity is provided with a discharge hole 411, and before the liquid rubber cylinder is used, a worker fills repair rubber 440 in the second cavity; the first cavity is provided with a first through hole 321, and the first through hole 321 is used for driving the liquid of the first piston 420 to flow into the annular cavity from the central pipe and driving the first piston 420 to move towards the discharge hole 411; rupture disc 430 is positioned within discharge port 411.
Specifically, when the sealing operation needs to be performed between the downhole sealing cylinder repairing tool and the sealing surface in the sealing cylinder, the sealing operation is performed to the inside of the central pipe, the liquid in the central pipe can enter between the second central pipe 320 and the hydraulic cylinder 410 sleeve from the first through hole 321, and the liquid can push the first piston 420 to move towards the upper joint 100, so that the first piston 420 presses the repairing adhesive 440, the repairing adhesive 440 can press the rupture disc 430, when the pressure reaches the compressive strength of the rupture disc 430, the rupture disc 430 can be crushed, and the repairing adhesive 440 can be discharged from the discharge hole 411 into the annular cavity between the downhole sealing cylinder repairing tool and the sealing surface in the sealing cylinder, and the repairing and sealing operation on the sealing cylinder on the oil well casing is completed.
It should be noted that the seal assembly has completed a pre-sealing operation prior to breaking of the rupture disc 430 to ensure that the repair gel 440 discharged from the discharge port 411 is operating in the designated working area to complete the sealing repair of the seal cartridge on the well casing.
It should be noted that the first piston 420 is a rubber piston, so that the repair adhesive 440 between the liquid adhesive cylinder 410 and the second center tube 320 is prevented from overflowing from the first piston 420.
It should be noted that the repair adhesive 440 is a liquid adhesive that cures when exposed to oil or water. For example: oily polyurethane blocking agents or aqueous polyurethane blocking agents.
Referring to fig. 4 and 5, in an alternative embodiment, a discharge hole 411 is a stepped hole, and a fixing sleeve 450 for pressing the rupture disc 430 is disposed in the discharge hole 411; the outer wall of the fixing sleeve 450 is screw-coupled with the inner wall of the discharge port 411.
Specifically, the discharge hole 411 is provided in a stepped hole shape, so that the fracturing disc is convenient to install, is positioned at the stepped part of the discharge hole 411 and is pressed by the fixing sleeve 450.
Wherein, be provided with the sealing washer between fracturing dish and the discharge gate 411, guarantee the leakproofness of discharge gate 411, avoid because oil, gas or water enter into in the hydraulic cylinder 410 from discharge gate 411 and lead to repair glue 440 to take place to harden unable follow discharge gate 411.
Referring to fig. 1, in an alternative of the present embodiment, the sealing assembly includes a first sealing assembly 500 and a second sealing assembly 600; the first sealing assembly 500 is located above the liquid cement repair assembly 400 and the second sealing assembly 600 is located below the liquid cement repair assembly 400.
Specifically, seal assemblies are arranged above and below the liquid cement repair assembly 400, after the first seal assembly 500 and the second seal assembly 600 finish pre-sealing work, repair cement 440 can be discharged from the discharge hole 411, the space between the first seal assembly 500 and the second seal assembly 600 can be fully expanded by the repair cement 440, after the arrangement, scratches and ravines on the inner wall of the seal cylinder on the oil well sleeve can be better repaired by the seal cement, and sealing work can be better performed.
Referring to fig. 2 and 3, in an alternative of the present embodiment, a first sealing assembly 500 includes a first hydraulic cylinder 510, a second piston 520, a first thrust collar 530, and a first rubber cylinder 540; one end of the first hydraulic cylinder 510 is in sealing connection with the upper joint 100, the other end of the first hydraulic cylinder 510 is in abutting connection with the first thrust sleeve 530, one end of the first thrust sleeve 530 far away from the first hydraulic cylinder 510 is in abutting connection with the first rubber cylinder 540, and one end of the first rubber cylinder 540 far away from the first thrust sleeve 530 is in abutting connection with the second central tube 320; the first central tube 310 is provided with a second through hole 311, and a second piston 520 is positioned between the first hydraulic cylinder 510 and the first central tube 310; the liquid in the central tube passes through the second through hole 311 to drive the second piston 520 to move, and the second piston 520 can press the first rubber cylinder 540 by pushing the first thrust sleeve 530.
Referring to fig. 3, in an alternative of the present embodiment, a first lock ring 550 for preventing the first thrust sleeve 530 from moving toward the second piston 520 is provided between the second piston 520 and the first thrust sleeve 530; the outer wall of the first central tube 310 is provided with a first latch 312, the inner wall of the first locking ring 550 is provided with a second latch 560, the extending direction of the first latch 312 faces the first thrust sleeve 530, and the extending direction of the second latch 560 faces the upper joint 100.
Specifically, when the first sealing assembly 500 is required to perform pre-sealing, the first sealing assembly is pressed into the central pipe, the liquid in the central pipe can enter between the first hydraulic cylinder 510 and the first central pipe 310 from the second through hole 311, the liquid in the central pipe can drive the second piston 520 to move, the second piston 520 can push the first locking ring 550 under the driving of the liquid, the first locking ring 550 pushes the first thrust sleeve 530, the first thrust sleeve 530 pushes the first rubber cylinder 540, so that the first rubber cylinder 540 is extruded, the middle part of the first rubber cylinder 540 is bulged, and the pre-sealing work between the underground sealing cylinder and the sealing surface in the sealing cylinder is completed.
The first locking ring 550 is sleeved outside the first central tube 310, the second latch 560 on the inner wall of the first locking ring 550 is matched with the first latch 312 on the outer wall of the first central tube 310, and the first latch 312 can block the second latch 560 from moving towards the upper connector 100, so that the first locking ring 550 can only move towards the lower connector 200. With this arrangement, when the second piston 520 pushes the first locking ring 550, the first locking ring 550 can move toward the lower joint 200, so as to press the first rubber sleeve 540, when the worker stops pressing in the central tube, the second piston 520 does not continue to press the first locking ring 550, at this time, the first latch 312 of the outer wall of the first central tube 310 can limit the movement of the first locking ring 550 toward the upper joint 100 (the rebound force of the first rubber sleeve 540 makes the first locking ring 550 have a tendency to move toward the upper joint 100), so that the first locking ring 550 continues to press the first thrust sleeve 530, that is, the first thrust sleeve 530 continues to press the first rubber sleeve 540, so that the first rubber sleeve 540 can stably complete the sealing operation for a long period of time.
Referring to fig. 8, a first notch 551 is formed in the first locking ring 550, and when the second piston 520 pushes the first locking ring 550 to move, the first locking ring 550 can expand and move toward the first thrust sleeve 530. Such that the second latch 560 can move relative to the first latch 312.
The first locking ring 550 is made of spring steel and has a certain elastic force.
Referring to fig. 6 and 7, in an alternative of the present embodiment, the second sealing assembly 600 includes a second hydraulic cylinder 610, a third piston 620, a second thrust collar 630, and a second rubber cylinder 640; one end of the second hydraulic cylinder 610 is in sealing connection with the lower joint 200, the other end of the second hydraulic cylinder is in abutting connection with the second thrust sleeve 630, one end of the second thrust sleeve 630 far away from the second hydraulic cylinder 610 is in abutting connection with the second rubber cylinder 640, and one end of the second rubber cylinder 640 far away from the second thrust sleeve 630 is in abutting connection with the third central tube 330; the third central tube 330 is provided with a third through hole 331, and the third piston 620 is positioned between the second hydraulic cylinder 610 and the third central tube 330; the liquid in the central tube passes through the third through hole 331 to drive the third piston 620 to move, and the third piston 620 can press the second rubber cylinder 640 by pushing the second thrust sleeve 630.
In an alternative of this embodiment, a second lock ring 650 is provided between the third piston 620 and the second thrust sleeve 630 for preventing the second thrust sleeve 630 from moving toward the third piston 620; the outer wall of the third central tube 330 is provided with a third latch 332, the inner wall of the second lock ring 650 is provided with a fourth latch 660, the extending direction of the third latch 332 faces the second thrust sleeve 630, and the extending direction of the fourth latch 660 faces the lower joint 200.
Specifically, when the second sealing assembly 600 is required to perform pre-sealing, the second sealing assembly is pressed into the central pipe, the liquid in the central pipe can enter between the second hydraulic cylinder 610 and the third central pipe 330 from the third through hole 331, the liquid can drive the third piston 620 to move, the third piston 620 can push the second locking ring 650 under the driving of the liquid, the second locking ring 650 pushes the second thrust sleeve 630, the second thrust sleeve 630 pushes the second rubber cylinder 640, so that the second rubber cylinder 640 is extruded, the middle part of the second rubber cylinder 640 is bulged, and the pre-sealing work between the underground sealing cylinder and the sealing surface in the sealing cylinder is completed.
The second locking ring 650 is sleeved outside the third central tube 330, the fourth latch 660 on the inner wall of the second locking ring 650 is matched with the third latch 332 on the outer wall of the third central tube 330, and the third latch 332 can block the fourth latch 660 from moving towards the lower joint 200, so that the fourth locking ring can only move towards the upper joint 100. With this arrangement, when the third piston 620 pushes the second locking ring, the second locking ring 650 can move toward the upper joint 100, so as to press the second rubber 640, when the worker stops pressing in the central tube, the third piston 620 will not continue to press the first locking ring 550, at this time, the third latch 332 of the outer wall of the third central tube 330 will limit the movement of the second locking ring 650 toward the lower joint 200 (the rebound force of the second rubber 640 will cause the second locking ring 650 to have a tendency to move toward the lower joint 200), so that the second ring continues to press the second thrust sleeve 630, i.e., the second thrust sleeve 630 continues to press the second rubber 640, so that the second rubber 640 can stably complete the sealing operation for a long period of time.
It should be noted that when the worker presses the central tube, the first seal assembly 500 and the second seal assembly 600 perform the pre-sealing operation at the same time when the pressure reaches a certain level.
Referring to fig. 9, a second gap 651 is formed in the second lock ring 650, and when the third piston 620 pushes the second lock ring 650 to move, the second lock ring 650 can expand and move toward the second thrust sleeve 630. So that the fourth latch 660 can move relative to the third latch 332.
The second locking ring 650 is made of spring steel and has a certain elastic force.
In an alternative to this embodiment, second piston 520 is coupled to first cylinder 510 via pin 700, third piston 620 is coupled to second cylinder 610 via pin 700, and the maximum shear stress of pin 700 is less than the maximum compressive strength of rupture disc 430.
Specifically, the second piston 520 is connected to the first hydraulic cylinder 510 via the pin 700, and when the second piston 520 is driven by the fluid, the second piston 520 first shears the pin 700 and then drives the first lock ring 550 to move.
The third piston 620 is connected to the second hydraulic cylinder 610 through the pin 700, and when the third piston 620 is driven by the fluid, the third piston 620 first shears the pin 700 and then drives the second lock ring 650 to move.
It should be noted that the maximum shear stress of pin 700 is less than the maximum compressive strength of rupture disc 430, and by this arrangement, it is ensured that the seal assembly will operate prior to the operation of the fluid repair assembly 400.
It should be noted that the first sealing ring 301 and the second central tube 320 are integrated, and the second sealing ring 302 and the third central tube 330 are integrated.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present invention, and not for limiting the same; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the invention.
Claims (10)
1. A downhole seal cartridge repair tool, comprising:
a central tube;
the sealing assemblies are at least two groups of sealing assemblies, are sleeved outside the central tube and are respectively positioned at two sides of the liquid glue repairing assembly (400); the maximum outer diameter of the sealing assembly can be increased under the action of external force so as to seal the annular space between the central tube and the inner sealing surface of the sealing cylinder; and
the liquid cement restoration assembly (400) is sleeved outside the central tube, an annular cavity is formed in the liquid cement restoration assembly, a first piston is arranged in the annular cavity, a first cavity positioned at one side of the first piston is communicated with the inside of the central tube through a first through hole (321), a second cavity positioned at the other side of the first piston is communicated with the annular space through a discharge hole (411), and a blocking piece which is opened under pressure is arranged at the discharge hole (411);
the second cavity is filled with repair gel (440);
when the inside of the central tube is pressurized, the liquid in the central tube can drive the sealing assembly to work so as to enlarge the maximum outer diameter of the sealing assembly, and the sealing assembly can perform pre-sealing work on an annular space between the sealing surface in the sealing cylinder and the central tube; the pressure of the liquid in the central tube is increased, so that the liquid cement repairing assembly (400) starts to work, the liquid in the central tube flows into the first cavity from the central tube through the first through hole (321), then the first piston (420) is pushed to move, the first piston (420) can press the repairing cement (440) so that a sealing piece on the discharge hole (411) is opened, and the first piston (420) pushes the repairing cement (440) to flow from the discharge hole (411) to the annular space.
2. The downhole seal cartridge repair tool of claim 1, wherein the hydraulic fluid repair assembly (400) comprises a hydraulic fluid cylinder (410) sleeved outside the base pipe and the annular cavity is formed between an inner wall of the hydraulic fluid cylinder (410) and an outer wall of the base pipe;
the outer wall of the central tube is fixedly provided with a first sealing ring table (301) for sealing the top of the liquid rubber cylinder (410) and a second sealing ring table (302) for sealing the bottom of the liquid rubber cylinder (410).
3. The downhole seal cartridge repair tool of claim 2, wherein the closure employs a rupture disc (430), and the rupture disc (430) is located within the discharge port (411);
the discharge hole (411) is a stepped hole, and a fixing sleeve (450) for pressing the rupture disc (430) is arranged in the discharge hole (411);
the outer wall of the fixed sleeve (450) is in threaded connection with the inner wall of the discharge hole (411).
4. A downhole sealing cartridge repair tool according to claim 3, wherein the sealing assemblies are provided in two sets, a first sealing assembly (500) and a second sealing assembly (600), respectively, above and below the fluid cement repair assembly (400);
the first sealing assembly (500) comprises a first hydraulic cylinder (510), a second piston (520), a first thrust sleeve (530) and a first rubber cylinder (540) which are sequentially arranged from top to bottom;
the top end of the first hydraulic cylinder (510) is connected with the upper joint (100) in a sealing way, the second piston (520) is positioned between the first hydraulic cylinder (510) and the central pipe, and the bottom end of the first rubber cylinder (540) is abutted with the first sealing ring table (301);
the central tube is provided with a second through hole (311), and liquid in the central tube can drive the second piston (520) to move after passing through the second through hole (311) so as to extrude the first rubber cylinder (540).
5. The downhole seal cartridge repair tool of claim 4, wherein a first lock ring (550) is disposed between the second piston (520) and the first thrust sleeve (530) for preventing movement of the first thrust sleeve (530) toward the second piston (520);
the center tube outer wall is provided with first latch (312), first catch (550) inner wall is provided with second latch (560), the extending direction of first latch (312) orientation first thrust sleeve (530), the extending direction of second latch (560) orientation top connection (100).
6. The downhole seal cartridge repair tool of claim 4 or 5, wherein the second seal assembly (600) comprises a second hydraulic cylinder (610), and a third piston (620), a second thrust sleeve (630), and a second cartridge (640) disposed in sequence from bottom to top;
the top end of the second hydraulic cylinder (610) is connected with the lower joint (200) in a sealing way, the third piston (620) is positioned between the second hydraulic cylinder (610) and the central pipe, and the bottom end of the second rubber cylinder (640) is abutted with the second sealing ring table (302);
the central tube is provided with a third through hole (331), and liquid in the central tube can drive the third piston (620) to move after passing through the third through hole (331) so as to extrude the second rubber cylinder (640).
7. The downhole seal cartridge repair tool of claim 6, wherein a second lock ring (650) is disposed between the third piston (620) and the second thrust sleeve (630) for preventing movement of the second thrust sleeve (630) toward the third piston (620);
the outer wall of the central tube is provided with a third latch (332), the inner wall of the second locking ring (650) is provided with a fourth latch (660), the extending direction of the third latch (332) faces the second thrust sleeve (630), and the extending direction of the fourth latch (660) faces the lower joint (200).
8. The downhole seal cartridge repair tool of claim 6, wherein the second piston (520) is connected to the first hydraulic cylinder (510) by a pin (700), the third piston (620) is connected to the second hydraulic cylinder (610) by a pin (700), and the shear strength of the pin (700) is less than the maximum compressive strength of the rupture disc (430).
9. The downhole seal cartridge repair tool of claim 6, wherein the base pipe comprises a first base pipe (310), a second base pipe (320), and a third base pipe (330) sealingly connected in sequence from top to bottom;
the first central tube (310) is connected with the upper joint (100), and the third central tube (330) is connected with the lower joint (200);
the hydraulic cylinder (410) is sleeved outside the second central tube (320), the first hydraulic cylinder (510) is sleeved outside the first central tube (310), and the second hydraulic cylinder (610) is sleeved outside the third central tube (330);
the first sealing ring table (301) is fixedly arranged on the outer wall of the second central tube (320), and the second sealing ring table (302) is fixedly arranged on the outer wall of the third central tube (330).
10. The downhole seal cartridge repair tool of claim 9, wherein the first seal ring land (301) is of unitary construction with the second base pipe (320), and the second seal ring land (302) is of unitary construction with the third base pipe (330).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910508364.3A CN110067527B (en) | 2019-06-12 | 2019-06-12 | Downhole sealing cylinder repairing tool |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910508364.3A CN110067527B (en) | 2019-06-12 | 2019-06-12 | Downhole sealing cylinder repairing tool |
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| CN110067527B true CN110067527B (en) | 2023-09-29 |
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Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1902375A (en) * | 2003-11-25 | 2007-01-24 | 贝克休斯公司 | Swelling layer inflatable |
| CA2568945A1 (en) * | 2006-06-02 | 2007-12-02 | Innicor Subsurface Technologies Inc. | Low pressure-set packer |
| CN102155251A (en) * | 2011-02-28 | 2011-08-17 | 河南理工大学 | Waterpower hole packer |
| CN102459808A (en) * | 2009-05-11 | 2012-05-16 | 贝克休斯公司 | Fracturing with telescoping members and sealing the annular space |
| CN103195389A (en) * | 2013-04-19 | 2013-07-10 | 四机赛瓦石油钻采设备有限公司 | Suspension packer for open hole well completion |
| CN104736793A (en) * | 2012-09-18 | 2015-06-24 | 国际壳牌研究有限公司 | Expansion assembly, top anchor and method for expanding a tubular in a wellbore |
| CN105545221A (en) * | 2016-03-04 | 2016-05-04 | 中国石油化工股份有限公司江汉油田分公司石油工程技术研究院 | Shale gas well no-killing production tubular column capable of being lifted up and put down under no pressure and construction method |
| CN109372463A (en) * | 2018-12-10 | 2019-02-22 | 东营市瑞丰石油技术发展有限责任公司 | Static pressure type bypasses packer |
| CN208900073U (en) * | 2018-08-17 | 2019-05-24 | 东营市瑞丰石油技术发展有限责任公司 | Hanging packer for horizontal well fracturing |
| CN210317236U (en) * | 2019-06-12 | 2020-04-14 | 天津凯雷油田技术有限公司 | Repairing tool for underground sealing cylinder |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8047298B2 (en) * | 2009-03-24 | 2011-11-01 | Halliburton Energy Services, Inc. | Well tools utilizing swellable materials activated on demand |
| US8215394B2 (en) * | 2009-06-09 | 2012-07-10 | Baker Hughes Incorporated | Control line patch |
| US8162054B2 (en) * | 2009-08-24 | 2012-04-24 | Halliburton Energy Services Inc. | Methods and apparatuses for releasing a chemical into a well bore upon command |
-
2019
- 2019-06-12 CN CN201910508364.3A patent/CN110067527B/en active Active
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1902375A (en) * | 2003-11-25 | 2007-01-24 | 贝克休斯公司 | Swelling layer inflatable |
| CA2568945A1 (en) * | 2006-06-02 | 2007-12-02 | Innicor Subsurface Technologies Inc. | Low pressure-set packer |
| CN102459808A (en) * | 2009-05-11 | 2012-05-16 | 贝克休斯公司 | Fracturing with telescoping members and sealing the annular space |
| CN102155251A (en) * | 2011-02-28 | 2011-08-17 | 河南理工大学 | Waterpower hole packer |
| CN104736793A (en) * | 2012-09-18 | 2015-06-24 | 国际壳牌研究有限公司 | Expansion assembly, top anchor and method for expanding a tubular in a wellbore |
| CN103195389A (en) * | 2013-04-19 | 2013-07-10 | 四机赛瓦石油钻采设备有限公司 | Suspension packer for open hole well completion |
| CN105545221A (en) * | 2016-03-04 | 2016-05-04 | 中国石油化工股份有限公司江汉油田分公司石油工程技术研究院 | Shale gas well no-killing production tubular column capable of being lifted up and put down under no pressure and construction method |
| CN208900073U (en) * | 2018-08-17 | 2019-05-24 | 东营市瑞丰石油技术发展有限责任公司 | Hanging packer for horizontal well fracturing |
| CN109372463A (en) * | 2018-12-10 | 2019-02-22 | 东营市瑞丰石油技术发展有限责任公司 | Static pressure type bypasses packer |
| CN210317236U (en) * | 2019-06-12 | 2020-04-14 | 天津凯雷油田技术有限公司 | Repairing tool for underground sealing cylinder |
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| CN110067527A (en) | 2019-07-30 |
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