CN110778287A - Use method of double-hydraulic bidirectional anchoring packer - Google Patents
Use method of double-hydraulic bidirectional anchoring packer Download PDFInfo
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- CN110778287A CN110778287A CN201911282730.4A CN201911282730A CN110778287A CN 110778287 A CN110778287 A CN 110778287A CN 201911282730 A CN201911282730 A CN 201911282730A CN 110778287 A CN110778287 A CN 110778287A
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- 238000004873 anchoring Methods 0.000 title claims abstract description 103
- 230000002457 bidirectional effect Effects 0.000 title claims abstract description 89
- 238000000034 method Methods 0.000 title claims abstract description 30
- 238000007789 sealing Methods 0.000 claims abstract description 94
- 238000003825 pressing Methods 0.000 claims abstract description 63
- 239000003129 oil well Substances 0.000 claims abstract description 31
- 239000007788 liquid Substances 0.000 claims description 35
- 238000004519 manufacturing process Methods 0.000 claims description 17
- 230000008569 process Effects 0.000 claims description 15
- 230000008439 repair process Effects 0.000 claims description 9
- 238000010008 shearing Methods 0.000 claims description 8
- 230000001502 supplementing effect Effects 0.000 claims description 8
- 238000000605 extraction Methods 0.000 claims description 7
- 230000009471 action Effects 0.000 claims description 4
- 230000000694 effects Effects 0.000 claims description 4
- 230000009977 dual effect Effects 0.000 claims 3
- 238000012856 packing Methods 0.000 abstract description 8
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 230000002035 prolonged effect Effects 0.000 abstract description 2
- 239000010410 layer Substances 0.000 description 24
- 238000005086 pumping Methods 0.000 description 7
- 229910000831 Steel Inorganic materials 0.000 description 6
- 239000010959 steel Substances 0.000 description 6
- 230000008859 change Effects 0.000 description 4
- 238000013461 design Methods 0.000 description 3
- 230000003044 adaptive effect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 210000005036 nerve Anatomy 0.000 description 2
- 230000007547 defect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 210000000664 rectum Anatomy 0.000 description 1
- 239000002356 single layer Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B33/00—Sealing or packing boreholes or wells
- E21B33/10—Sealing or packing boreholes or wells in the borehole
- E21B33/12—Packers; Plugs
- E21B33/122—Multiple string packers
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- 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
- 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
- E21B33/1265—Packers; Plugs with fluid-pressure-operated elastic cup or skirt with mechanical slips
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Abstract
The invention relates to a use method of a double-hydraulic bidirectional anchoring packer. The technical scheme is as follows: the upper joint is connected with the upper end of the central pipe through a deblocking shear pin, the lower end of the central pipe is connected with the lower joint, a sealing piston is sleeved outside a first hydraulic outlet in the central pipe, the upper side of the sealing piston is connected with a lock spring pressing cap, the lock spring pressing cap is connected with the upper joint through a seat sealing shear pin, and a lock spring is arranged in the lock spring pressing cap; the outside cover of second hydraulic pressure export has seal cover and compensation formula packing element benefit pipe, and the upper end and the sealed piston contact of seal cover, and the lower extreme presses the cover to be connected on the packing element, and the downside that presses the cover on the packing element is equipped with the packing element, and the downside and the packing element of packing element press down the cover cooperation, the lower part that the packing element pressed the cover down passes through the upper cone and cooperates with the leaf spring in the slips cover, makes the slips stretch out and warp the sleeve pipe contact fixedly. The beneficial effects are as follows: the outer diameter of the packer is reduced, the inner drift diameter of the packer is increased, the packer can be used in a deformed casing, the repairing operation and cost of the deformed casing are saved, and the service life of an oil well is prolonged.
Description
Technical Field
The invention relates to an oil extraction device and method in the petroleum industry, in particular to a use method of a double-hydraulic bidirectional anchoring packer.
Background
In the process of oil exploitation, due to the influence of various conditions such as geology, process and the like, an oil well with a large amount of deformed casings is also called a casing deformation well, some of the deformed casings can be repaired, but after most of the repaired casings are repaired, because internal stress still exists in the oil well, more serious secondary deformation still occurs, and even some casings are repaired due to damage. Thus, these modified casings, to achieve efficient production operations, may also be used in another way, specifically: the new special packer suitable for the deformation casing is designed because the existing packer suitable for the layered oil production generally adopts a Y441 bidirectional anchoring packer, namely a hydraulic setting, lifting and unsetting working mode, but the existing conventional Y441 packer has a large outer diameter, such as 115mm in a 5-inch semi TBG casing and 150mm in a 7-inch TBG casing. However, in a casing that has been deformed, such as: 5 half TBG of cun warp the sleeve pipe, can cross the external diameter and be 110mm, long lead to the rule for 1500mm, 7 cun TBG warp the sleeve pipe, can cross the external diameter and be 140mm, long 1500mm lead to the rule, under the degree of deformation like this, corresponding conventional packer all has no way to go into corresponding deformation sleeve intraductally, and the size of reducing the packer on the basis of original structure only can cause interior latus rectum to diminish, can cause the play liquid volume of follow-up oil recovery to drop, and the slips is apart from the intraductal wall interval big, can not realize slips anchoring sleeve intraductal wall. Therefore, it is necessary to design a special packer for a deformed casing well.
Disclosure of Invention
The invention aims to provide a using method of a double-hydraulic bidirectional anchoring packer aiming at the defects in the prior art, the outer diameter of the packer is reduced on the basis of enlarging the inner drift diameter by designing a special packer, and the principle of double-hydraulic driving setting and lifting deblocking is adopted.
The invention provides a use method of a double-hydraulic bidirectional anchoring packer, which adopts the technical scheme that the method comprises the following steps:
first, the device is run into a deformed casing in the well: the device is characterized in that a blind plug (5), a second group of double-hydraulic bidirectional anchoring packers (15), a first group of double-hydraulic bidirectional anchoring packers (7) and an oil pump barrel (11) are sequentially connected from bottom to top, the device is lowered into a deformed casing through an oil pipe and lowered to a set position, the second group of double-hydraulic bidirectional anchoring packers (15) are located between a second oil layer region (3) and a first oil layer region (4), and the first group of double-hydraulic bidirectional anchoring packers (7) are located above the first oil layer region (4);
secondly, setting a packer: high-pressure liquid is pumped into the oil pipe from the well mouth, the high-pressure liquid flows along the oil pipe to the oil well pump barrel (11), then continuously downwards passes through the first group of double-hydraulic bidirectional anchoring packers (7) and the second group of double-hydraulic bidirectional anchoring packers (15) and finally reaches the blind plug (5), high-pressure liquid is sprayed out along the first hydraulic outlet (A) and the second hydraulic outlet (B) of the first group of double-hydraulic bidirectional anchoring packers (7) and the second group of double-hydraulic bidirectional anchoring packers (15) to respectively push the sealing piston (7.5) and the sealing sleeve (7.9) to apply force downwards, and the setting shear pin (7.2) is sheared, the movement is continued, the slip (7.20) is pushed out to be propped against the inner wall of the deformation sleeve, and the rubber sleeve (7.13) is extruded and deformed to contact the inner wall of the deformed sleeve to form a sealing and isolating function, so that the setting of the first group of double-hydraulic bidirectional anchoring packers (7) and the second group of double-hydraulic bidirectional anchoring packers (15) is completed;
third, lower plunger completion: a plunger (12) of the oil well pump is put into the oil pipe from the well mouth, the plunger (12) of the oil well pump is put into an oil well pump barrel (11), then, the operation site is cleaned, and oil extraction production is started;
fourthly, workover treatment: after a period of oil production, well repair operation is required; firstly, lifting a plunger (12) of the oil well pump out of a well mouth, then, operating an oil lifting pipe from the well mouth, shearing deblocking shear pins (7.6) of a first group of double-hydraulic bidirectional anchoring packers (7) and a second group of double-hydraulic bidirectional anchoring packers (15) under the lifting action force of the oil pipe, then, continuously lifting the oil pipe, withdrawing slips (7.20) of the first group of double-hydraulic bidirectional anchoring packers (7) and the second group of double-hydraulic bidirectional anchoring packers (15), retracting a rubber sleeve (7.13), completing deblocking operation of the packers, and after deblocking the packers, smoothly lifting the whole device out of the well mouth from a deformation sleeve to further carry out well repair.
Preferably, the double-hydraulic bidirectional anchoring packer comprises an upper connector (7.1), a seat sealing shear pin (7.2), a lock spring (7.3), a lock spring pressing cap (7.4), a sealing piston (7.5), a deblocking shear pin (7.6), a central pipe (7.8), a sealing sleeve (7.9), a fixed sealing ring (7.10), a compensation type rubber barrel pipe supplementing (7.11), a rubber barrel upper pressing sleeve (7.12), a rubber barrel (7.13), a rubber barrel lower pressing sleeve (7.14), an upper cone (7.16), a slip sleeve (7.18), a plate spring (7.19), a slip (7.20) and a lower connector (7.21), wherein the upper connector (7.1) is connected with the upper end of the central pipe (7.8) through the deblocking shear pin (7.6), the lower end of the central pipe (7.8) is connected with the lower connector (7.21), a first hydraulic outlet (A) and a second hydraulic outlet (B) are arranged in the central pipe (7.8), the upper side of the piston sealing cap (7.5) is connected with the piston sealing piston (7.5), the lock spring pressure cap (7.4) is connected with the upper joint (7.1) through a seat seal shear pin (7.2), and a lock spring (7.3) is arranged in the lock spring pressure cap (7.4); the outer side of the second hydraulic outlet (B) is sleeved with a sealing sleeve (7.9) and a compensation type rubber sleeve supplementing pipe (7.11), the upper end of the sealing sleeve (7.9) is in contact with a sealing piston (7.5), the lower end of the sealing sleeve is connected with a rubber sleeve upper pressing sleeve (7.12), a rubber sleeve (7.13) is arranged on the lower side of the rubber sleeve upper pressing sleeve (7.12), the lower side of the rubber sleeve (7.13) is matched with a rubber sleeve lower pressing sleeve (7.14), and the lower portion of the rubber sleeve lower pressing sleeve (7.14) is matched with a plate spring (7.19) in a slip sleeve (7.18) through an upper cone (7.16) so that a slip (7.20) extends out to be in contact with and fixed with the deformation sleeve (2).
Preferably, the setting operation of the double-hydraulic bidirectional anchoring packer comprises the following specific processes:
when high-pressure liquid is sprayed out along a first hydraulic outlet (A) of a first group of double-hydraulic bidirectional anchoring packers (7), the high-pressure liquid pushes a sealing piston (7.5) to move downwards, the sealing piston (7.5) drives a locking spring pressing cap (7.4) to shear a setting shear pin (7.2) and move downwards, a locking spring (7.3) is further driven to move downwards, the locking spring (7.3) is matched with the outer wall of an upper connector (7.1), so that the locking spring (7.3) can only move downwards in a single direction, and the position of the locking spring pressing cap (7.4) is locked;
when high-pressure liquid is sprayed out along a second hydraulic outlet (B) of a second group of double-hydraulic bidirectional anchoring packers (15), the high-pressure liquid pushes a compensation type rubber sleeve compensating pipe (7.11) to move downwards, the lower end of the compensation type rubber sleeve compensating pipe (7.11) pushes an upper cone (7.16) to move downwards to push a slip (7.20) out of a slip sleeve (7.18), the upper end of the compensation type rubber sleeve compensating pipe (7.11) pulls a sealing sleeve (7.9) to move downwards, after the slip (7.20) is tightly bitten and fixed with the inner wall of a deformation sleeve, the compensation type rubber sleeve compensating pipe (7.11) continues to drive a rubber sleeve upper pressing sleeve (7.12) to move downwards, and a rubber sleeve lower pressing sleeve (7.14) is blocked by the upper cone (7.16), so that a rubber sleeve (7.13) is extruded and deformed, the inner wall of the deformation sleeve is sealed, and the sealing effect is realized.
Preferably, the dual-hydraulic bidirectional anchoring packer is subjected to deblocking operation in the following specific process:
firstly, an oil pipe is lifted from a well mouth, the oil pipe drives an upper joint (7.1) of a first group of double-hydraulic bidirectional anchoring packers (7) to upwards apply force, and the positions of a sealing piston (7.5), a sealing sleeve (7.9) and a rubber sleeve upper pressure sleeve (7.12) are further fixed without moving upwards due to the fact that a locking spring (7.3) fixes a locking spring pressure cap (7.4); after the pulling force of the lifting is larger than the shearing force of the unsealing shear pin (7.6), the unsealing shear pin (7.6) can be cut off, and because the upper end of the central pipe (7.8) is connected with the upper joint (7.1) through the unsealing shear pin (7.6), after the unsealing shear pin (7.6) is sheared, the upper joint (7.1) is loosened from the central pipe (7.8), so that the slips (7.20) are retracted, the rubber barrel (7.13) is retracted, and the unsealing operation is completed.
Compared with the prior art, the invention has the following beneficial effects:
the newly designed packer has the advantages that the outer diameter is reduced, the inner drift diameter is increased, the setting is firm, the deblocking is convenient, the use of the packer in a deformed casing is mainly realized, and thus, a casing deformation well is prevented from being repaired by the casing, so that the repairing operation and the cost of the deformed casing are saved, meanwhile, the damage generated in the repairing process of the casing and the internal stress generated by the repairing process are reduced, and the strange phenomenon of the repeated repairing process of the casing is avoided; meanwhile, due to the stress in the repaired casing, the phenomenon that the tools which are put in the casing cannot be taken out possibly due to secondary deformation to cause the overhaul of the oil well is avoided, so that the service life of the oil well is prolonged to a great extent;
secondly, because the casing deformation well is not damaged in mechanical repair, the shape of a deformation sleeve of the casing deformation well is in a relatively stable state, and the outer diameter of a special packer which is set in is small, the inner drift diameter is large, the liquid outlet amount is not influenced, so that a set tool is easy to take out, and the use is safer.
Drawings
FIG. 1 is a schematic structural view of the upper half of the present invention;
FIG. 2 is a schematic structural view of the lower half of the present invention;
FIG. 3 is a schematic structural view of the present invention in use;
FIG. 4 is a schematic diagram of a reversing opener;
FIG. 5 is a schematic view of a C-C configuration of a reversing opener;
FIG. 6 is a schematic view of the connection of the top sub to a second embodiment of the base pipe;
in the upper diagram: the device comprises a manual well bottom (1), a deformation sleeve (2), a second oil layer area (3), a first oil layer area (4), a blind plug (5), a ball seat (6), a first group of double-hydraulic bidirectional anchoring packers (7), a sealing steel ball (8), a first hydraulic switch (9), a reversing opener (10), an oil well pump barrel (11), an oil well pump plunger (12), a reversing opener shear pin (13), a second hydraulic switch (14) and a second group of double-hydraulic bidirectional anchoring packers (15);
the sealing device comprises an upper joint (7.1), a setting shear pin (7.2), a lock spring (7.3), a lock spring pressing cap (7.4), a sealing piston (7.5), a deblocking shear pin (7.6), a limiting support bulge (7.7), a central pipe (7.8), a sealing sleeve (7.9), a fixed sealing ring (7.10), a compensation type rubber sleeve filling pipe (7.11), a rubber sleeve upper pressing sleeve (7.12), a rubber sleeve (7.13), a rubber sleeve lower pressing sleeve (7.14), a liner pipe retaining ring (7.15), an upper cone (7.16), a deblocking shear ring (7.17), a slip sleeve (7.18), a plate spring (7.19), a slip (7.20), a lower joint (7.21), a shear ring mounting groove (7.22) and a shear ring anti-dropping nail (7.23); opener main body (10.1) and reversing hole (10.2).
Detailed Description
The preferred embodiments of the present invention will be described in conjunction with the accompanying drawings, and it will be understood that they are described herein for the purpose of illustration and explanation and not limitation.
The upper rubber cylinder pressing sleeve (7.12), the rubber cylinder (7.13) and the lower rubber cylinder pressing sleeve (7.14) are positioned on the outer side of the compensation type rubber cylinder pipe supplementing (7.11), so that the distance between the rubber cylinder (7.13) and the deformation sleeve (2) is shortened; and the upper end of the compensation type rubber cylinder pipe supplementing (7.11) protrudes outwards and is provided with a sealing ring, and the lower end of the compensation type rubber cylinder pipe supplementing is movably connected with a liner pipe retaining ring (7.15) for limiting and preventing dropping during deblocking.
The upper part of the upper cone (7.16) is of a cylindrical structure, the lower part of the upper cone is of a cone structure, and the spacing distance between the slip sleeve (7.18) and the rubber sleeve lower pressing sleeve (7.14) is the setting distance.
The upper pressing sleeve (7.12) of the rubber cylinder is of a cylindrical structure, the wall thickness of the upper side is smaller than that of the lower side, and the wall thickness of the lower side is equal to that of the rubber cylinder (7.13); the wall thickness of the upper side is reduced to be equal to that of the sealing sleeve (7.9), and the sealing sleeve (7.9) pushes the upper pressing sleeve (7.12) of the rubber sleeve to move downwards during setting.
And a fixed sealing ring (7.10) is arranged between the sealing sleeve (7.9) and the central pipe (7.8), and the fixed sealing ring (7.10) is positioned on the upper side of the second hydraulic outlet (B).
The upper end of the lock spring pressing cap (7.4) is connected with the outer wall of the upper joint (7.1) through a seat seal shear pin (7.2), and the lower end of the lock spring pressing cap (7.4) is connected with a sealing piston (7.5); the inner side of the lock spring pressing cap (7.4) is connected with a lock spring (7.3), and the inner wall of the lock spring (7.3) is provided with teeth which are matched with the teeth on the outer wall of the upper joint (7.1), and can only move downwards under the pushing of the lock spring pressing cap (7.4); the tooth can be designed into a right-angled triangle structure, so that the lock spring can only move downwards but not move upwards, locking and fixing are realized, and of course, the tooth can be designed into other conventional structures, so that the lock spring meets the requirement.
The lower extreme of top connection (7.1) be connected through deblocking shear pin (7.6) and the upper end of center tube (7.8), just the lower extreme of top connection (7.1) is equipped with spacing support arch (7.7).
The lower end of the sealing piston (7.5) is arranged below the first hydraulic outlet (A), the inner side of the lower end is in sliding fit with the central pipe (7.8), the outer side of the lower end is in contact fit with the sealing sleeve (7.9), the inner wall of the middle lower part of the sealing piston (7.5) is in sliding fit with the limiting supporting protrusion (7.7), and the outer side of the upper end of the sealing piston (7.5) is in threaded connection with the locking spring pressing cap (7.4).
The invention provides a using method of a double-hydraulic bidirectional anchoring packer, which is applied to a deformed casing, adopts a plunger pump to pump oil, does not produce oil layer by layer and comprises the following processes:
first, the device is run into a deformed casing in the well: the device is characterized in that a blind plug (5), a second group of double-hydraulic bidirectional anchoring packers (15), a first group of double-hydraulic bidirectional anchoring packers (7) and an oil pump barrel (11) are sequentially connected from bottom to top, the device is lowered into a deformed casing through an oil pipe and lowered to a set position, the second group of double-hydraulic bidirectional anchoring packers (15) are located between a second oil layer region (3) and a first oil layer region (4), and the first group of double-hydraulic bidirectional anchoring packers (7) are located above the first oil layer region (4);
secondly, setting a packer: high-pressure liquid is pumped into the oil pipe from the well mouth, the high-pressure liquid flows along the oil pipe to the oil well pump barrel (11), then continuously downwards passes through the first group of double-hydraulic bidirectional anchoring packers (7) and the second group of double-hydraulic bidirectional anchoring packers (15) and finally reaches the blind plug (5), high-pressure liquid is sprayed out along the first hydraulic outlet (A) and the second hydraulic outlet (B) of the first group of double-hydraulic bidirectional anchoring packers (7) and the second group of double-hydraulic bidirectional anchoring packers (15) to respectively push the sealing piston (7.5) and the sealing sleeve (7.9) to apply force downwards, and the setting shear pin (7.2) is sheared, the movement is continued, the slip (7.20) is pushed out to be propped against the inner wall of the deformation sleeve, and the rubber sleeve (7.13) is extruded and deformed to contact the inner wall of the deformed sleeve to form a sealing and isolating function, so that the setting of the first group of double-hydraulic bidirectional anchoring packers (7) and the second group of double-hydraulic bidirectional anchoring packers (15) is completed;
third, lower plunger completion: a plunger (12) of the oil well pump is put into the oil pipe from the well mouth, the plunger (12) of the oil well pump is put into an oil well pump barrel (11), then, the operation site is cleaned, and oil extraction production is started;
fourthly, workover treatment: after a period of oil production, well repair operation is required; firstly, lifting a plunger (12) of the oil well pump out of a well mouth, then, operating an oil lifting pipe from the well mouth, shearing deblocking shear pins (7.6) of a first group of double-hydraulic bidirectional anchoring packers (7) and a second group of double-hydraulic bidirectional anchoring packers (15) under the lifting action force of the oil pipe, then, continuously lifting the oil pipe, withdrawing slips (7.20) of the first group of double-hydraulic bidirectional anchoring packers (7) and the second group of double-hydraulic bidirectional anchoring packers (15), retracting a rubber sleeve (7.13), completing deblocking operation of the packers, and after deblocking the packers, smoothly lifting the whole device out of the well mouth from a deformation sleeve to further carry out well repair.
Preferably, the setting operation of the double-hydraulic bidirectional anchoring packer comprises the following specific processes:
when high-pressure liquid is sprayed out along a first hydraulic outlet (A) of a first group of double-hydraulic bidirectional anchoring packers (7), the high-pressure liquid pushes a sealing piston (7.5) to move downwards, the sealing piston (7.5) drives a locking spring pressing cap (7.4) to shear a setting shear pin (7.2) and move downwards, a locking spring (7.3) is further driven to move downwards, the locking spring (7.3) is matched with the outer wall of an upper connector (7.1), so that the locking spring (7.3) can only move downwards in a single direction, and the position of the locking spring pressing cap (7.4) is locked;
when high-pressure liquid is sprayed out along a second hydraulic outlet (B) of a second group of double-hydraulic bidirectional anchoring packers (15), the high-pressure liquid pushes a compensation type rubber sleeve compensating pipe (7.11) to move downwards, the lower end of the compensation type rubber sleeve compensating pipe (7.11) pushes an upper cone (7.16) to move downwards to push a slip (7.20) out of a slip sleeve (7.18), the upper end of the compensation type rubber sleeve compensating pipe (7.11) pulls a sealing sleeve (7.9) to move downwards, after the slip (7.20) is tightly bitten and fixed with the inner wall of a deformation sleeve, the compensation type rubber sleeve compensating pipe (7.11) continues to drive a rubber sleeve upper pressing sleeve (7.12) to move downwards, and a rubber sleeve lower pressing sleeve (7.14) is blocked by the upper cone (7.16), so that a rubber sleeve (7.13) is extruded and deformed, the inner wall of the deformation sleeve is sealed, and the sealing effect is realized.
Preferably, the dual-hydraulic bidirectional anchoring packer is subjected to deblocking operation in the following specific process:
firstly, an oil pipe is lifted from a well mouth, the oil pipe drives an upper joint (7.1) of a first group of double-hydraulic bidirectional anchoring packers (7) to upwards apply force, and the positions of a sealing piston (7.5), a sealing sleeve (7.9) and a rubber sleeve upper pressure sleeve (7.12) are further fixed without moving upwards due to the fact that a locking spring (7.3) fixes a locking spring pressure cap (7.4); after the pulling force of the lifting is larger than the shearing force of the unsealing shear pin (7.6), the unsealing shear pin (7.6) can be cut off, and because the upper end of the central pipe (7.8) is connected with the upper joint (7.1) through the unsealing shear pin (7.6), after the unsealing shear pin (7.6) is sheared, the upper joint (7.1) is loosened from the central pipe (7.8), so that the slips (7.20) are retracted, the rubber barrel (7.13) is retracted, and the unsealing operation is completed.
It should be noted that:
because the oil well is a casing change well, the outer diameter of the tool is smaller than that of a common tool, so certain difficulty is brought to the implementation of the process, and therefore, a casing change well packer, namely a special packer for a deformation casing pipe is specially designed, and the packer is characterized by small outer diameter and large inner diameter of the used casing pipe, so that the design also adopts the characteristics which are not available on some common packers: 1. the original double-layer pipe structure is changed into a single-layer pipe, so that the purpose is to strive for a larger expansion amount for the slips and the rubber cylinder, realize a small outer diameter, and realize anchoring and sealing with the inner wall of the deformed sleeve.
Specifically, the original Y441-115 is a special packer suitable for a 5 North Tunnel boring machine (5) TBG casing, the outer diameter of the packer is phi 115mm, the minimum inner diameter is only phi 48mm, and the requirements of the 5 North Tunnel boring machine (5) TBG deformation casing are as follows: the conventional packer cannot be put in the packer by passing through a gauge with the outer diameter of 110mm and the length of 1500 mm; y441-150 is a special packer suitable for 7TBG casing, the outer diameter of the packer is phi 150mm, the minimum inner diameter is only phi 62mm, and the general specification requirements of the 7TBG casing are as follows: the external diameter is 140mm, the through gauge of 1500mm long, like this, the conventional packer can't be put into too;
the newly designed special packer is suitable for a special packer of a 5 nerve TBG casing, has the outer diameter of 108mm, and meets the requirement of the general rule of a 5 nerve TBG deformable casing; the packer is suitable for a special packer of a 7TBG casing pipe, the outer diameter of the packer is 138mm, and the requirement of a standard gauge of the 7TBG deformation casing pipe is met.
In addition, the inner diameter of the Y441-108 of the newly designed special packer is phi 55mm, the maximum adaptive size can reach phi 128mm, the inner diameter of the Y441-138 is phi 66mm, the maximum adaptive size is phi 170mm, and the experiment proves that the sealing differential pressure is more than 35mpa, so that the special packer is an ideal sleeve variable seal. The special packer adopts double hydraulic drive, and simultaneously, in order to increase the outer diameter of the tool and reduce the length of the tool as much as possible, the tool adopts a method of unifying the setting distance and the unsetting distance to shorten the length of the tool, specifically, the original Y441-115 or Y441-155 is 1.3 meters in total length and is a single cylinder, while the tool of the design is 0.78 meters in length and is double cylinders.
As the oil well is a casing change well, the process selects specially designed casing change seal, and adopts the principle of hydraulic drive setting such as Y441 and lifting for unsealing, the creeping of the casing can be prevented due to the anchoring function of the slips, the problem that the setting and the opening of a special reversing opener are separated into two steps for preventing the unreal setting of the Y441 can be solved, and the normal production of the plunger of the oil well pump can be realized after the reversing channel is opened.
In addition, it should be noted that the first hydraulic switch (9), the second hydraulic switch (14) and the like adopted by the invention all adopt the existing mature devices, and are already applied on site in the victory oil field, and in addition, the hydraulic switches mentioned in the Chinese patent publication No. 103510928B with the patent name of "a layered oil production device" are not detailed any more.
Embodiment 2, referring to fig. 3, the present invention can be applied to a deformed casing and adopts a layered oil production technology, and the specific structure is as follows: the oil pumping pump comprises a blind plug (5), a first group of double-hydraulic bidirectional anchoring packers (7), a first hydraulic switch (9), a reversing opener (10), an oil pumping cylinder (11), a second hydraulic switch (14) and a second group of double-hydraulic bidirectional anchoring packers (15), wherein the upper end of the oil pumping cylinder (11) is connected with an oil pipe, the lower end of the oil pumping cylinder is connected with the reversing opener (10), the lower part of the reversing opener (10) is connected with the first group of double-hydraulic bidirectional anchoring packers (7), the lower part of the first group of double-hydraulic bidirectional anchoring packers (7) is connected with the first hydraulic switch (9), the lower part of the first hydraulic switch (9) is connected with the second hydraulic switch (14) through the second group of double-hydraulic bidirectional anchoring packers (15), the lower part of the second hydraulic switch (14) is connected with a short section; through setting of a first group of double-hydraulic bidirectional anchoring packers (7) and a second group of double-hydraulic bidirectional anchoring packers (15), a first oil layer area (4) and a second oil layer area (3) are separated in a deformed casing (2), a first hydraulic switch (9) is arranged on the first oil layer area (4), a second hydraulic switch (14) is arranged on the second oil layer area (3), and the two oil production areas are controlled respectively; high-pressure liquid is injected into a wellhead between the deformed casing (2) and the oil pipe, and the high-pressure liquid enters the first hydraulic switch (9) and the second hydraulic switch (14) through the reversing opener (10) to realize the control of the layered mining; the oil pumping operation is realized by putting the oil pumping pump plunger (12) into the oil pumping pump barrel (11).
Referring to the attached drawings 4-5, the reversing opener (10) comprises an opener main body (10.1), reversing holes (10.2), a ball seat (6), a sealing steel ball (8) and reversing opener shear pins (13), wherein joints are respectively arranged at two ends of the opener main body (10.1), a plurality of reversing holes (10.2) are formed in the middle of the opener main body, the ball seat (6) is fixed through the reversing opener shear pins (13), and the reversing holes (10.2) are blocked through the outer wall of the ball seat (6); when the blind plug is needed to work, the sealing steel ball (8) is put in, the ball seat (6) is knocked off, and the sealing steel ball (8) and the ball seat (6) fall above the blind plug (5) at the bottom of the well.
The outer wall of the ball seat (6) is provided with a circle of shear pin grooves (6.1) which are used for being matched with shear pins (13) of the reversing opener.
The invention is applied to a layered oil production device of an oil deformation cased well, and the using method comprises the following processes:
first, the device is run into a deformed casing in the well: the device comprises a blind plug (5), a second hydraulic switch (14), a second group of double-hydraulic two-way anchoring packers (15), a first hydraulic switch (9), a first group of double-hydraulic two-way anchoring packers (7), a reversing opener (10) and an oil well pump barrel (11) which are sequentially connected from bottom to top, and then the device is put into a deformation casing through an oil pipe and is put down to a set position, so that the second group of double-hydraulic two-way anchoring packers (15) are positioned between a second oil layer region (3) and a first oil layer region (4), the first group of double-hydraulic two-way anchoring packers (7) are positioned above the first oil layer region (4), the second hydraulic switch (14) corresponds to the second oil layer region (3), and the first hydraulic switch (9) corresponds to the first oil layer region (4);
secondly, setting a packer: high-pressure liquid is pumped into an oil pipe from a well mouth, the high-pressure liquid extends into an oil pipe along the oil pipe until an oil pump barrel (11), then the high-pressure liquid continuously downwards enters a first group of double-hydraulic two-way anchoring packers (7), a first hydraulic switch (9), a second group of double-hydraulic two-way anchoring packers (15) and a second hydraulic switch (14) through a reversing opener (10), finally the high-pressure liquid reaches a blind plug (5), the high-pressure liquid is sprayed out along a first hydraulic outlet (A) and a second hydraulic outlet (B) of the first group of double-hydraulic two-way anchoring packers (7) and the second group of double-hydraulic two-way anchoring packers (15), a sealing piston (7.5) and a sealing sleeve (7.9) are respectively pushed to apply force downwards and a seat seal shear pin (7.2) is sheared, the movement is continuously carried out, so that a slip (7.20) is jacked to the inner wall of a deformed sleeve, and, forming a sealing and packing function, and completing setting of a first group of double-hydraulic bidirectional anchoring packers (7) and a second group of double-hydraulic bidirectional anchoring packers (15);
thirdly, the reversing opener is switched on: a sealing steel ball (8) is thrown into the oil pipe from the wellhead, and the sealing steel ball (8) passes through the oil pipe and an oil pump barrel (11) and falls onto a ball seat (6) in a reversing opener (10), so that the ball seat (6) is knocked down until the ball seat falls above a blind plug (5); after the ball seat (6) falls down, the reversing hole (10.2) is exposed, so that a cavity between the oil pipe and the casing pipe is communicated with an inner cavity of the oil pipe above the first group of double-hydraulic bidirectional anchoring packers (7), and high-pressure liquid is conveniently injected from the cavity between the oil pipe and the casing pipe to realize reversing control of the first hydraulic switch (9) and the second hydraulic switch (14);
fourth, lower plunger completion: a plunger (12) of the oil well pump is put into the oil pipe from the well mouth, the plunger (12) of the oil well pump is put into an oil well pump barrel (11), then, the operation site is cleaned, and oil extraction production is started;
fifthly, reversing operation: determining to carry out oil extraction production on the second oil layer area (3) or the first oil layer area (4) according to oil well geological data, pressurizing a cavity between a sleeve and an oil pipe through a well mouth, enabling pressure to enter a central pipe column through a reversing hole (10.2) of a reversing opener (10), controlling the reversing of a first hydraulic switch (9) and a second hydraulic switch (14), realizing the reversing control of the hydraulic switches, and further realizing the oil extraction production operation of the second oil layer area (3) or the first oil layer area (4);
sixthly, workover: after a period of oil production, well repair operation is required; firstly, lifting a plunger (12) of the oil well pump out of a well mouth, then, operating an oil lifting pipe from the well mouth, shearing deblocking shear pins (7.6) of a first group of double-hydraulic bidirectional anchoring packers (7) and a second group of double-hydraulic bidirectional anchoring packers (15) under the lifting action force of the oil pipe, then, continuously lifting the oil pipe, withdrawing slips (7.20) of the first group of double-hydraulic bidirectional anchoring packers (7) and the second group of double-hydraulic bidirectional anchoring packers (15), retracting a rubber sleeve (7.13), completing deblocking operation of the packers, and after deblocking the packers, smoothly lifting the whole device out of the well mouth from a deformation sleeve to further carry out well repair.
The setting operation of the packer is as follows:
when high-pressure liquid is sprayed out along a first hydraulic outlet (A) of a first group of double-hydraulic bidirectional anchoring packers (7), the high-pressure liquid pushes a sealing piston (7.5) to move downwards, the sealing piston (7.5) drives a locking spring pressing cap (7.4) to shear a setting shear pin (7.2) and move downwards, a locking spring (7.3) is further driven to move downwards, the locking spring (7.3) is matched with the outer wall of an upper connector (7.1), so that the locking spring (7.3) can only move downwards in a single direction, and the position of the locking spring pressing cap (7.4) is locked;
when high-pressure liquid is sprayed out along a second hydraulic outlet (B) of a second group of double-hydraulic bidirectional anchoring packers (15), the high-pressure liquid pushes a compensation type rubber sleeve compensating pipe (7.11) to move downwards, the lower end of the compensation type rubber sleeve compensating pipe (7.11) pushes an upper cone (7.16) to move downwards to push a slip (7.20) out of a slip sleeve (7.18), the upper end of the compensation type rubber sleeve compensating pipe (7.11) pulls a sealing sleeve (7.9) to move downwards, after the slip (7.20) is tightly bitten and fixed with the inner wall of a deformation sleeve, the compensation type rubber sleeve compensating pipe (7.11) continues to drive a rubber sleeve upper pressing sleeve (7.12) to move downwards, and a rubber sleeve lower pressing sleeve (7.14) is blocked by the upper cone (7.16), so that a rubber sleeve (7.13) is extruded and deformed, the inner wall of the deformation sleeve is sealed, and the sealing effect is realized.
The unsealing operation of the packer is as follows:
firstly, an oil pipe is lifted from a well mouth, the oil pipe drives an upper joint (7.1) of a first group of double-hydraulic bidirectional anchoring packers (7) to upwards apply force, and the positions of a sealing piston (7.5), a sealing sleeve (7.9) and a rubber sleeve upper pressure sleeve (7.12) are further fixed without moving upwards due to the fact that a locking spring (7.3) fixes a locking spring pressure cap (7.4); after the pulling force of the lifting is larger than the shearing force of the unsealing shear pin (7.6), the unsealing shear pin (7.6) can be cut off, and because the upper end of the central pipe (7.8) is connected with the upper joint (7.1) through the unsealing shear pin (7.6), after the unsealing shear pin (7.6) is sheared, the upper joint (7.1) is loosened from the central pipe (7.8), so that the slips (7.20) are retracted, the rubber barrel (7.13) is retracted, and the unsealing operation is completed.
Embodiment 3, the difference between the dual-hydraulic bidirectional anchoring packer provided by the invention and embodiment 2 is as follows: comprises an upper joint (7.1), a seat seal shear pin (7.2), a lock spring (7.3), a lock spring pressing cap (7.4), a seal piston (7.5), a deblocking shear ring (7.17), a central tube (7.8), a seal sleeve (7.9), a fixed seal ring (7.10), a compensation type rubber tube filling tube (7.11), a rubber tube upper pressing sleeve (7.12), a rubber tube (7.13), a rubber tube lower pressing sleeve (7.14), an upper cone (7.16), a slip sleeve (7.18), a plate spring (7.19), a slip (7.20) and a lower joint (7.21), wherein the upper joint (7.1) is connected with the upper end of the central tube (7.8) through the deblocking shear ring (7.17), the lower end of the central tube (7.8) is connected with the lower joint (7.21), a first hydraulic outlet (A) and a second hydraulic outlet (B) are arranged in the central tube (7.8), the outer side of the first hydraulic outlet (A) is sleeved with the piston (7.5), and the piston (7.5) is connected with the upper pressing cap (7.4), the lock spring pressure cap (7.4) is connected with the upper joint (7.1) through a seat seal shear pin (7.2), and a lock spring (7.3) is arranged in the lock spring pressure cap (7.4); the outer side of the second hydraulic outlet (B) is sleeved with a sealing sleeve (7.9) and a compensation type rubber sleeve supplementing pipe (7.11), the upper end of the sealing sleeve (7.9) is in contact with a sealing piston (7.5), the lower end of the sealing sleeve is connected with a rubber sleeve upper pressing sleeve (7.12), a rubber sleeve (7.13) is arranged on the lower side of the rubber sleeve upper pressing sleeve (7.12), the lower side of the rubber sleeve (7.13) is matched with a rubber sleeve lower pressing sleeve (7.14), and the lower portion of the rubber sleeve lower pressing sleeve (7.14) is matched with a plate spring (7.19) in a slip sleeve (7.18) through an upper cone (7.16) so that a slip (7.20) extends out to be in contact with and fixed with the deformation sleeve (2).
Referring to fig. 6, upper joint (7.1) lower extreme is equipped with spacing support protrusion (7.7), and is equipped with shear ring mounting groove (7.22) on spacing support protrusion (7.7), shear ring mounting groove (7.22) in install deblocking shear ring (7.17), the outside is equipped with shear ring anticreep nail 7.23, this shear ring mounting groove (7.22) can adopt a plurality of arc walls, installation deblocking shear ring (7.17) in the arc wall, the characteristics of adopting the deblocking shear ring can increase the engaging force, the area of increase connection, avoid the high strength of setting shear nail requirement, reduce the intensity requirement of material, still can satisfy the needs of deblocking.
The above description is only a few of the preferred embodiments of the present invention, and any person skilled in the art may modify the above-described embodiments or modify them into equivalent ones. Therefore, any simple modifications or equivalent substitutions made in accordance with the technical solution of the present invention are within the scope of the claims of the present invention.
Claims (4)
1. A use method of a double-hydraulic bidirectional anchoring packer is characterized by comprising the following steps:
first, the device is run into a deformed casing in the well: the device is characterized in that a blind plug (5), a second group of double-hydraulic bidirectional anchoring packers (15), a first group of double-hydraulic bidirectional anchoring packers (7) and an oil pump barrel (11) are sequentially connected from bottom to top, the device is lowered into a deformed casing through an oil pipe and lowered to a set position, the second group of double-hydraulic bidirectional anchoring packers (15) are located between a second oil layer region (3) and a first oil layer region (4), and the first group of double-hydraulic bidirectional anchoring packers (7) are located above the first oil layer region (4);
secondly, setting a packer: high-pressure liquid is pumped into the oil pipe from the well mouth, the high-pressure liquid flows along the oil pipe to the oil well pump barrel (11), then continuously downwards passes through the first group of double-hydraulic bidirectional anchoring packers (7) and the second group of double-hydraulic bidirectional anchoring packers (15) and finally reaches the blind plug (5), high-pressure liquid is sprayed out along the first hydraulic outlet (A) and the second hydraulic outlet (B) of the first group of double-hydraulic bidirectional anchoring packers (7) and the second group of double-hydraulic bidirectional anchoring packers (15) to respectively push the sealing piston (7.5) and the sealing sleeve (7.9) to apply force downwards, and the setting shear pin (7.2) is sheared, the movement is continued, the slip (7.20) is pushed out to be propped against the inner wall of the deformation sleeve, and the rubber sleeve (7.13) is extruded and deformed to contact the inner wall of the deformed sleeve to form a sealing and isolating function, so that the setting of the first group of double-hydraulic bidirectional anchoring packers (7) and the second group of double-hydraulic bidirectional anchoring packers (15) is completed;
third, lower plunger completion: a plunger (12) of the oil well pump is put into the oil pipe from the well mouth, the plunger (12) of the oil well pump is put into an oil well pump barrel (11), then, the operation site is cleaned, and oil extraction production is started;
fourthly, workover treatment: after a period of oil production, well repair operation is required; firstly, lifting a plunger (12) of the oil well pump out of a well mouth, then, operating an oil lifting pipe from the well mouth, shearing deblocking shear pins (7.6) of a first group of double-hydraulic bidirectional anchoring packers (7) and a second group of double-hydraulic bidirectional anchoring packers (15) under the lifting action force of the oil pipe, then, continuously lifting the oil pipe, withdrawing slips (7.20) of the first group of double-hydraulic bidirectional anchoring packers (7) and the second group of double-hydraulic bidirectional anchoring packers (15), retracting a rubber sleeve (7.13), completing deblocking operation of the packers, and after deblocking the packers, smoothly lifting the whole device out of the well mouth from a deformation sleeve to further carry out well repair.
2. The method of using a dual hydraulic bi-directional anchoring packer as recited in claim 1, further comprising: the dual-hydraulic bidirectional anchoring packer comprises an upper connector (7.1), a seat sealing shear pin (7.2), a lock spring (7.3), a lock spring pressing cap (7.4), a sealing piston (7.5), a deblocking shear pin (7.6), a central tube (7.8), a sealing sleeve (7.9), a fixed sealing ring (7.10), a compensation type rubber tube filling tube (7.11), a rubber tube upper pressing sleeve (7.12), a rubber tube (7.13), a rubber tube lower pressing sleeve (7.14), an upper cone (7.16), a slip sleeve (7.18), a plate spring (7.19), a slip (7.20) and a lower connector (7.21), wherein the upper connector (7.1) is connected with the upper end of the central tube (7.8) through the deblocking shear pin (7.6), the lower end of the central tube (7.8) is connected with the lower connector (7.21), a first hydraulic outlet (A) and a second hydraulic outlet (B) are arranged in the central tube (7.8), the outer side of the first hydraulic outlet (A) is connected with the piston sealing cap (7.5), and the piston sealing cap (7.5) is connected with the piston pressing cap (7.10), the lock spring pressure cap (7.4) is connected with the upper joint (7.1) through a seat seal shear pin (7.2), and a lock spring (7.3) is arranged in the lock spring pressure cap (7.4); the outer side of the second hydraulic outlet (B) is sleeved with a sealing sleeve (7.9) and a compensation type rubber sleeve supplementing pipe (7.11), the upper end of the sealing sleeve (7.9) is in contact with a sealing piston (7.5), the lower end of the sealing sleeve is connected with a rubber sleeve upper pressing sleeve (7.12), a rubber sleeve (7.13) is arranged on the lower side of the rubber sleeve upper pressing sleeve (7.12), the lower side of the rubber sleeve (7.13) is matched with a rubber sleeve lower pressing sleeve (7.14), and the lower portion of the rubber sleeve lower pressing sleeve (7.14) is matched with a plate spring (7.19) in a slip sleeve (7.18) through an upper cone (7.16) so that a slip (7.20) extends out to be in contact with and fixed with the deformation sleeve (2).
3. The method of using a dual hydraulic bi-directional anchoring packer as recited in claim 1, further comprising: the setting operation of the double-hydraulic bidirectional anchoring packer comprises the following specific processes:
when high-pressure liquid is sprayed out along a first hydraulic outlet (A) of a first group of double-hydraulic bidirectional anchoring packers (7), the high-pressure liquid pushes a sealing piston (7.5) to move downwards, the sealing piston (7.5) drives a locking spring pressing cap (7.4) to shear a setting shear pin (7.2) and move downwards, a locking spring (7.3) is further driven to move downwards, the locking spring (7.3) is matched with the outer wall of an upper connector (7.1), so that the locking spring (7.3) can only move downwards in a single direction, and the position of the locking spring pressing cap (7.4) is locked;
when high-pressure liquid is sprayed out along a second hydraulic outlet (B) of a second group of double-hydraulic bidirectional anchoring packers (15), the high-pressure liquid pushes a compensation type rubber sleeve compensating pipe (7.11) to move downwards, the lower end of the compensation type rubber sleeve compensating pipe (7.11) pushes an upper cone (7.16) to move downwards to push a slip (7.20) out of a slip sleeve (7.18), the upper end of the compensation type rubber sleeve compensating pipe (7.11) pulls a sealing sleeve (7.9) to move downwards, after the slip (7.20) is tightly bitten and fixed with the inner wall of a deformation sleeve, the compensation type rubber sleeve compensating pipe (7.11) continues to drive a rubber sleeve upper pressing sleeve (7.12) to move downwards, and a rubber sleeve lower pressing sleeve (7.14) is blocked by the upper cone (7.16), so that a rubber sleeve (7.13) is extruded and deformed, the inner wall of the deformation sleeve is sealed, and the sealing effect is realized.
4. The method of using a dual hydraulic bi-directional anchoring packer as recited in claim 1, further comprising: the deblocking operation of the double-hydraulic bidirectional anchoring packer comprises the following specific processes:
firstly, an oil pipe is lifted from a well mouth, the oil pipe drives an upper joint (7.1) of a first group of double-hydraulic bidirectional anchoring packers (7) to upwards apply force, and the positions of a sealing piston (7.5), a sealing sleeve (7.9) and a rubber sleeve upper pressure sleeve (7.12) are further fixed without moving upwards due to the fact that a locking spring (7.3) fixes a locking spring pressure cap (7.4); after the pulling force of the lifting is larger than the shearing force of the unsealing shear pin (7.6), the unsealing shear pin (7.6) can be cut off, and because the upper end of the central pipe (7.8) is connected with the upper joint (7.1) through the unsealing shear pin (7.6), after the unsealing shear pin (7.6) is sheared, the upper joint (7.1) is loosened from the central pipe (7.8), so that the slips (7.20) are retracted, the rubber barrel (7.13) is retracted, and the unsealing operation is completed.
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| CN201911282730.4A CN110778287A (en) | 2019-12-13 | 2019-12-13 | Use method of double-hydraulic bidirectional anchoring packer |
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| CN201911282730.4A CN110778287A (en) | 2019-12-13 | 2019-12-13 | Use method of double-hydraulic bidirectional anchoring packer |
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| CN110778287A true CN110778287A (en) | 2020-02-11 |
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| CN112127827A (en) * | 2020-10-22 | 2020-12-25 | 中国海洋石油集团有限公司 | Large-drift-diameter packer |
| CN113294119A (en) * | 2020-02-21 | 2021-08-24 | 中国石油天然气股份有限公司 | Packer and well completion structure |
| CN114320215A (en) * | 2021-12-29 | 2022-04-12 | 西安宇星石油机械新技术开发有限公司 | Hydraulic internal pressurization packer with expansion joint |
| CN115234191A (en) * | 2022-07-25 | 2022-10-25 | 中国石油化工股份有限公司 | Double-sealing anti-back-tooth packer |
| CN115370316A (en) * | 2022-09-01 | 2022-11-22 | 惟其信石油机械(天津)有限公司 | Double-anchoring high-pressure packer |
| CN117988758A (en) * | 2024-03-29 | 2024-05-07 | 西安宇星石油机械新技术开发有限公司 | Hydraulic internal energy storage lockable bidirectional anchoring slip packer for fracturing |
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| CN112127827A (en) * | 2020-10-22 | 2020-12-25 | 中国海洋石油集团有限公司 | Large-drift-diameter packer |
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