CN216714335U - Safe releasing device between packers and safe disconnection system between packers - Google Patents

Safe releasing device between packers and safe disconnection system between packers Download PDF

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Publication number
CN216714335U
CN216714335U CN202220153712.7U CN202220153712U CN216714335U CN 216714335 U CN216714335 U CN 216714335U CN 202220153712 U CN202220153712 U CN 202220153712U CN 216714335 U CN216714335 U CN 216714335U
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China
Prior art keywords
barrel
locking
locking claw
boss
releasing
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CN202220153712.7U
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Chinese (zh)
Inventor
皮婷婷
尚磊
陈金莉
孟令祥
陈亚丽
邹峰梅
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China Petroleum and Chemical Corp
Petroleum Engineering Technology Research Institute of Sinopec Zhongyuan Oilfield Co
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China Petroleum and Chemical Corp
Petroleum Engineering Technology Research Institute of Sinopec Zhongyuan Oilfield Co
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Priority to CN202220153712.7U priority Critical patent/CN216714335U/en
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Publication of CN216714335U publication Critical patent/CN216714335U/en
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Abstract

The utility model relates to a safe releasing device between packers and a safe disconnection system between the packers, wherein the safe releasing device between the packers comprises a locking claw cylinder, the upper end of the locking claw cylinder is provided with an upper joint, and the lower end of the locking claw cylinder is assembled with a lower releasing cylinder; the lower end part of the locking claw cylinder is provided with a boss locking claw, and the inner wall of the lower releasing cylinder is provided with a locking groove; an inner bushing is arranged in the locking claw barrel, an annular groove is formed in the inner bushing, the inner bushing is provided with a locking position at which the annular groove and the boss locking claw are vertically staggered to keep the boss locking claw clamped in the locking groove, the annular groove and the boss locking claw are correspondingly arranged to enable the boss locking claw to swing inwards to a releasing position in the annular groove, and a shear pin used for keeping the inner bushing at the locking position is arranged between the locking claw barrel and the inner bushing; the safety disconnection system between the packers comprises a releasing rod device matched with the safety releasing device between the packers. The utility model effectively solves the technical problem that the releasing device in the prior art is not easy to disengage due to poor elastic deformation capability of the releasing lug.

Description

Safe releasing device between packers and safe disconnection system between packers
Technical Field
The utility model belongs to the technical field of taking out packers from a well, and particularly relates to a safety releasing device between packers and a safety disconnecting system between packers.
Background
In the water injection development stage of an oil field, the packer is widely applied, is connected to a downhole pipe column and is a downhole tool for sealing and isolating an oil pipe and an oil and gas well casing or an open hole well wall annular space. However, due to the large diameter of the packer, with the extension of the downhole production time, the packer can not be normally unset due to the corrosion of the setting component (such as slips, etc.), or the packer can be buried due to the gradual deposition of impurities in the upper ring space of the packer, so that the packer cannot be normally unset, and further the pipe column connected with the packer cannot be normally raised. Use two-stage packer as an example, can normally the deblocking when upper packer, and when subordinate packer was blocked, because the tubular column is whole can't realize releasing the card through lifting, transferring, consequently can only carry out salvage after the cover mills to higher level packer, but like this not only can lead to operating time long, construction cost is high, and intact higher level packer is also destroyed moreover. Therefore, it is necessary to provide a release device between two adjacent packers to disconnect the two packers.
The conventional safety releasing device for oil-gas wells mainly comprises a mechanical type safety releasing device and a hydraulic type safety releasing device, wherein the mechanical type safety releasing device can be divided into a reverse buckling type safety releasing device and a shear pin type safety releasing device according to different releasing actions. The upper joint and the lower joint of the back-off safety releasing device are connected through left-handed threads, and when a pipe column is stuck in the well, the pipe column can be withdrawn by rotating the pipe column to the right; the shear pin type safety releasing device is connected with an upper joint and a lower joint through shear pins, when a pipe column is clamped in the underground, the shear pins can be sheared by lifting or lowering the pipe column to a designed tonnage, and the pipe column is withdrawn. However, the conventional mechanical safety releasing device has certain disadvantages, such as the reverse buckle type is easy to rotate and disengage automatically, and the shear pin type is easy to be cut off by mistake during the releasing. The hydraulic safety releasing device generally generates pressure difference inside a tool through ball throwing and pressure holding, and a driving tool realizes the releasing function, for example, the hydraulic ball throwing type safety joint disclosed in the Chinese utility model patent with the publication number of CN206503572U is the mode. The hydraulic ball-throwing safety joint comprises a lower joint and an anti-rotation short section spliced on the lower joint, wherein a sealing sliding sleeve is inserted into the anti-rotation short section, and the sealing sliding sleeve is connected with the anti-rotation short section through a shear pin; prevent being provided with on the rotary sub-section and giving up the convex, be provided with on the lower clutch and give up the concave, when giving up the convex card income give up concave in, the lower clutch with prevent that the rotary sub-section is connected and is formed a whole, when giving up the convex and giving up concave stagger, the lower clutch with prevent that the rotary sub-section can throw off from top to bottom. An avoiding groove is formed in the sealing sliding sleeve, and when the releasing projection corresponds to the avoiding groove, the releasing projection can swing inwards to be separated from the releasing recess.
The hydraulic ball throwing type safety joint in the prior art can realize the disengagement of an upper pipe column and a lower pipe column, but in actual use, because the releasing lug is positioned at the middle position of the anti-rotation short section, the internal folding and deforming capacity is poor, after long-time use, even if the releasing lug corresponds to the avoiding groove, the releasing lug can not be folded and separated from the releasing lug, and finally the upper pipe column and the lower pipe column can not be disengaged.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide a safe releasing device between packers, which aims to solve the technical problem that the releasing device in the prior art is not easy to release due to poor elastic deformation capability of a releasing lug; the utility model also aims to provide a safe disconnecting system between packers to solve the problem.
In order to realize the purpose, the safe releasing device between the packers adopts the following technical scheme:
a safety releasing device between packers comprises a locking claw barrel, wherein an upper joint used for being connected with an upper packer is arranged at the upper end of the locking claw barrel, a lower releasing barrel used for being connected with a lower packer is assembled outside the lower end of the locking claw barrel in a sliding mode, and the lower releasing barrel is matched with the locking claw barrel through a spline sleeve to achieve rotation stopping; at least two boss locking claws are arranged at the end part of the lower end of the locking claw barrel at intervals along the circumferential direction, locking grooves corresponding to the boss locking claws are formed in the inner wall of the lower releasing barrel, the boss locking claws are clamped into the locking grooves to prevent the lower releasing barrel from falling off downwards from the locking claw barrel, and the boss locking claws can be radially inwards retracted to be separated from the locking grooves and enable the locking claw barrel and the lower releasing barrel to be separated from each other vertically; an inner bushing is assembled in the locking claw barrel in a sliding mode, and an annular groove is formed in the outer wall of the inner bushing; the neck bush is provided with a locking position, wherein the annular groove and the boss locking claw are vertically staggered to keep the boss locking claw in the clamping locking groove, the annular groove and the boss locking claw are correspondingly arranged to enable the boss locking claw to swing inwards to a releasing position in the annular groove, a shear pin used for keeping the neck bush at the locking position is arranged between the locking claw barrel and the neck bush, and the neck bush can be used for outwards supporting the boss locking claw and keeping the boss locking claw in the clamping locking groove when in the locking position.
The beneficial effects of the above technical scheme are that: the utility model arranges the safety releasing device between the packers connected between the upper packer and the lower packer, when the upper packer can be normally unset and the lower packer is stuck, downward acting force can be applied to the upper end of the inner lining, under the action of the action, the shear pin which keeps the inner bushing at the locking position can be sheared, the inner bushing is pressed to slide downwards until the inner bushing is positioned at the releasing position, the boss locking claw clamped into the locking groove is arranged corresponding to the annular groove, the boss locking claw can swing into the annular groove and be separated from the locking groove, or when the locking claw barrel is pulled upwards, the boss locking claw can be separated from the locking groove and swings inwards to the annular groove, so that the locking claw barrel and the lower releasing barrel can be separated up and down to realize the lifting of the upper packer, meanwhile, the clamped lower isolator can be conveniently milled, so that the operation time can be reduced, and the construction cost can be reduced; because the boss locking claw is located the lower extreme tip of a locking claw section of thick bamboo, can increase the ability that the boss locking claw warp inwards like this, even long-time use also can guarantee the ability that the boss locking claw warp inwards, can guarantee promptly that a locking claw section of thick bamboo and the lower normal upper and lower separation of giving up between the section of thick bamboo, and then guarantee the normal use of safe giving up device between the packer.
Further, the lower end of the inner bush penetrates into the lower releasing barrel, a first sealing ring is arranged between the inner bush and the locking claw barrel, a second sealing ring is arranged between the inner bush and the lower releasing barrel, the first sealing ring and the second sealing ring are respectively arranged on the upper side and the lower side of the annular groove, a third sealing ring is arranged between the locking claw barrel and the lower releasing barrel, when the inner bush is located at a locking position, the first sealing ring, the second sealing ring, the third sealing ring, the inner bush, the locking claw barrel and the lower releasing barrel are matched to form a closed inner cavity, and the boss locking claw is located in the closed inner cavity.
The beneficial effects of the above technical scheme are that: the sealed inner cavity can prevent external impurities, sediment, scale and the like from entering the sealed inner cavity, further avoid the influence of external factors on the boss locking claw, ensure the inward normal deformation of the boss locking claw, and further ensure the normal vertical separation between the locking claw barrel and the lower releasing barrel.
Furthermore, at least one of the inner wall of the upper end of the locking groove and the side wall of the upper end of the boss locking claw is provided with an inclined surface, and the inclined surface is used for driving the boss locking claw to retract when the inner bushing is in the disengaging position and the locking claw barrel is lifted up.
The beneficial effects of the above technical scheme are that: through setting up the inclined plane, like this when upwards pulling a lock claw section of thick bamboo, even boss lock claw self elastic deformation ability inwards is limited, also can carry out radial roof pressure to boss lock claw through the inclined plane, makes it deviate from the locked groove, and then has further guaranteed the normal upper and lower separation between a lock claw section of thick bamboo and the lower releasing gadget.
Furthermore, a clamp spring groove is formed in the periphery of the inner bushing above the annular groove, a clamp spring is installed in the clamp spring groove, a positioning ring groove is formed in the inner wall of the locking claw barrel, and when the inner bushing is located at a locking position, the clamp spring is compressed between the locking claw barrel and the inner bushing; when the inner bushing is in the releasing position, the clamp spring moves into the positioning ring groove and expands outwards in the radial direction, the upper end of the positioning ring groove is provided with a blocking inner wall, and the blocking inner wall is used for being matched with the expanded clamp spring in a blocking mode up and down so as to prevent the inner bushing from being reset upwards to the locking position.
The beneficial effects of the above technical scheme are that: when downward acting force is applied to the inner lining, the inner lining is stressed to move downwards, the clamp spring can expand outwards in the positioning ring groove and vertically correspond to the blocking inner wall of the positioning ring groove after expansion, and even if the inner lining moves upwards after being stressed, the inner lining can be prevented from returning to a locking position through the blocking matching of the blocking inner wall and the clamp spring. Especially when the bush is suppressed with disclosing the pole, because the size between disclosing the pole and the bush is comparatively close, easily take place the adhesion after long-time the use, can avoid bringing the bush and upwards restoring to the throne when disclosing the pole and lifting through setting up the jump ring.
Furthermore, one side of the annular groove, which is close to the clamp spring, is provided with an inclined plane which inclines outwards from bottom to top.
The beneficial effects of the above technical scheme are that: through the inclined plane, can make the jump ring outwards expand gradually at the in-process of assembling the jump ring to also can play the guide effect to the installation of jump ring, in order to make things convenient for the installation of jump ring on the inner liner.
Furthermore, a conical surface for righting the force application part is arranged at the upper end port of the inner bushing.
The beneficial effects of the above technical scheme are that: the force application part is righted by the conical surface, the vertical force application direction of the force application part to the inner lining can be ensured, and the uniformity of the shearing force applied by the inner lining to each shear pin is further ensured, so that the inner lining can simultaneously shear each shear pin, and the normal downward sliding of the inner lining is ensured.
Furthermore, a downward annular boss is arranged on the outer wall of the locking claw barrel and used for being matched with the upper end face of the lower releasing barrel in a blocking mode when the inner bushing is located at the locking position.
The beneficial effects of the above technical scheme are that: when the inner bushing is located at the locking position, the annular boss and the stop of the upper end face of the lower releasing barrel can prevent the lower releasing barrel and the locking claw barrel from shaking up and down, so that the connection stability of the lower releasing barrel and the locking claw barrel is ensured, and the stability of the safety releasing device between the packers during operation is further ensured.
In order to achieve the purpose, the safe disconnection system between the packers adopts the following technical scheme:
a safe disconnection system between packers comprises a safe releasing device between packers and a releasing rod device matched with the safe releasing device between packers, wherein the safe releasing device between packers comprises a locking claw barrel, the upper end of the locking claw barrel is provided with an upper joint used for being connected with an upper packer, the outer part of the lower end of the locking claw barrel is provided with a lower releasing barrel used for being connected with a lower packer in a sliding mode, and the lower releasing barrel is matched with the locking claw barrel through a spline plug bush to achieve rotation stopping; at least two boss locking claws are arranged at the end part of the lower end of the locking claw barrel at intervals along the circumferential direction, locking grooves corresponding to the boss locking claws are formed in the inner wall of the lower releasing barrel, the boss locking claws are clamped into the locking grooves to prevent the lower releasing barrel from falling off downwards from the locking claw barrel, and the boss locking claws can be radially inwards retracted to be separated from the locking grooves and enable the locking claw barrel and the lower releasing barrel to be separated from each other vertically; an inner bushing is assembled in the locking claw barrel in a sliding mode, and an annular groove is formed in the outer wall of the inner bushing; the inner bushing is provided with an annular groove and boss locking claws which are vertically staggered so as to keep the boss locking claws at locking positions clamped in the locking grooves, and is also provided with annular grooves and boss locking claws which are correspondingly arranged so as to enable the boss locking claws to swing inwards to releasing positions in the annular groove; the releasing rod device comprises a poking rod, the upper end of the poking rod is provided with a poking rod upper joint used for connecting the pipe column, and the poking rod is used for jacking the inner lining of the safety releasing device between the packers.
The beneficial effects of the above technical scheme are that: the releasing rod device matched with the safety releasing device between the packers is arranged, so that the problems that sealing elements like sealing balls cannot be thrown due to the fact that a pipe column is not smooth and a hydraulic safety releasing device cannot bear pressure due to the fact that the pipe column is broken and leaked can be solved by means of jacking the inner lining of the poking rod, and normal implementation of the releasing function of the safety releasing device between the packers and normal play of the packers can be guaranteed.
Further, the lower end of the inner bush penetrates into the lower releasing barrel, a first sealing ring is arranged between the inner bush and the locking claw barrel, a second sealing ring is arranged between the inner bush and the lower releasing barrel, the first sealing ring and the second sealing ring are respectively arranged on the upper side and the lower side of the annular groove, a third sealing ring is arranged between the locking claw barrel and the lower releasing barrel, when the inner bush is located at a locking position, the first sealing ring, the second sealing ring, the third sealing ring, the inner bush, the locking claw barrel and the lower releasing barrel are matched to form a closed inner cavity, and the boss locking claw is located in the closed inner cavity.
The beneficial effects of the above technical scheme are that: the sealed inner cavity can prevent external impurities, sediment, scale and the like from entering the sealed inner cavity, further avoid the influence of external factors on the boss locking claw, ensure the inward normal deformation of the boss locking claw, and further ensure the normal vertical separation between the locking claw barrel and the lower releasing barrel.
Furthermore, at least one of the inner wall of the upper end of the locking groove and the side wall of the upper end of the boss locking claw is provided with an inclined surface, and the inclined surface is used for driving the boss locking claw to retract when the inner bushing is in the disengaging position and the locking claw barrel is lifted up.
The beneficial effects of the above technical scheme are that: through setting up the inclined plane, like this when upwards pulling a lock claw section of thick bamboo, even boss lock claw self elastic deformation ability inwards is limited, also can carry out radial roof pressure to boss lock claw through the inclined plane, makes it deviate from the locked groove, and then has further guaranteed the normal upper and lower separation between a lock claw section of thick bamboo and the lower releasing gadget.
Furthermore, a clamp spring groove is formed in the periphery of the inner bushing above the annular groove, a clamp spring is installed in the clamp spring groove, a positioning ring groove is formed in the inner wall of the locking claw barrel, and when the inner bushing is located at a locking position, the clamp spring is compressed between the locking claw barrel and the inner bushing; when the inner bushing is in the releasing position, the clamp spring moves into the positioning ring groove and expands outwards in the radial direction, the upper end of the positioning ring groove is provided with a blocking inner wall, and the blocking inner wall is used for being matched with the expanded clamp spring in a blocking mode up and down so as to prevent the inner bushing from being reset upwards to the locking position.
The beneficial effects of the above technical scheme are that: when downward acting force is applied to the inner lining, the inner lining is stressed to move downwards, the clamp spring can expand outwards in the positioning ring groove and vertically correspond to the blocking inner wall of the positioning ring groove after expansion, and even if the inner lining moves upwards after being stressed, the inner lining can be prevented from returning to a locking position through the blocking matching of the blocking inner wall and the clamp spring. Especially when the bush is suppressed with disclosing the pole, because the size between disclosing the pole and the bush is comparatively close, easily take place the adhesion after long-time the use, can avoid bringing the bush and upwards restoring to the throne when disclosing the pole and lifting through setting up the jump ring.
Furthermore, one side of the annular groove, which is close to the clamp spring, is provided with an inclined plane which inclines outwards from bottom to top.
The beneficial effects of the above technical scheme are that: through the inclined plane, can make the jump ring outwards expand gradually at the in-process of assembling the jump ring to also can play the guide effect to the installation of jump ring, in order to make things convenient for the installation of jump ring on the inner liner.
Furthermore, a conical surface for righting the force application part is arranged at the upper end port of the inner bushing.
The beneficial effects of the above technical scheme are that: the force application part is righted by the conical surface, the vertical force application direction of the force application part to the inner lining can be ensured, and the uniformity of the shearing force applied by the inner lining to each shear pin is further ensured, so that the inner lining can simultaneously shear each shear pin, and the normal downward sliding of the inner lining is ensured.
Furthermore, the outer wall of the locking claw barrel is provided with a downward annular boss, and the annular boss is used for being matched with the end face of the upper end of the lower releasing barrel in a blocking mode when the inner lining is located at the locking position.
The beneficial effects of the above technical scheme are that: when the neck bush is in the locking position, through the stop of the annular boss with the upper end terminal surface of lower releasing barrel, can prevent to rock from top to bottom between lower releasing barrel and the lock claw section of thick bamboo, guarantee the stability that both connect, and then stability when also having guaranteed the operation of safe releasing device between the packer.
Furthermore, a centering sleeve is sleeved on the poking rod and used for centering the poking rod when the poking rod is lowered.
The beneficial effects of the above technical scheme are that: through the righting of the set of righting to disclosing the pole, not only can guarantee to disclose the pole and pass the packer smoothly, be favorable to improving the operating efficiency, when reducing the operation and using, also can reduce simultaneously disclosing the pole to the damage of the packer that can the normal deblocking.
Furthermore, the lower end of the poking rod is provided with an upward limiting ring table, and the centering sleeve is assembled on the poking rod in a sliding mode and is located between the upper connector of the poking rod and the limiting ring table.
The beneficial effects of the above technical scheme are that: the centering sleeve assembled in a sliding manner can realize the centering of the poking rod, and meanwhile, the length of the poking rod inserted can be adjusted according to actual requirements, so that the applicability of the poking rod is enhanced; the limiting ring table is arranged, so that the centering sleeve can be prevented from sliding out of the poking rod downwards, the stress area between the poking rod and the inner bushing can be increased, and the damage caused when the inner bushing is jacked and pressed is reduced.
Drawings
FIG. 1 is a schematic illustration of a string of run in tubulars;
FIG. 2 is a schematic view of the inter-packer safety release device of the present invention;
FIG. 3 is a schematic diagram of the structure of part A of FIG. 2;
fig. 4 is a schematic view of the lost handle device of the present invention.
In the figure: 10. a pawl barrel; 11. a stopping table; 12. trimming a nail hole; 13. an annular boss; 14. a rectangular keyway; 15. positioning the ring groove; 16. a boss locking claw; 17. stopping the inner wall; 20. a lower releasing barrel; 21. a rectangular key body; 22. locking the groove; 23. an annular seal land; 24. an external threaded section; 30. an inner liner; 31. an upper end table; 32. a conical surface; 33. a locking groove; 34. an annular groove; 40. an upper joint; 41. an internal thread section; 50. a first seal ring; 60. a second seal ring; 70. a third seal ring; 80. a clamp spring; 90. shearing the nails; 100. a poking rod; 101. a barrel upper joint; 102. a limit ring table; 110. a centralizing sleeve; 120. an upper packer; 130. a lower packer; 140. a safety releasing device between packers; 150. and (4) a pipe column.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the detailed description and specific examples, while indicating the preferred embodiment of the utility model, are intended for purposes of illustration only and are not intended to limit the scope of the utility model. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the utility model, as claimed, but is merely representative of selected embodiments of the utility model. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the present invention without making any creative effort, shall fall within the protection scope of the present invention.
It is to be noted that, in the embodiments of the present invention, relational terms such as "first" and "second", and the like, which may be present in the terms of the first and second, may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, terms such as "comprises," "comprising," or any other variation thereof, which may be present, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, the appearances of the phrase "comprising an … …" or similar limitation may be present without necessarily excluding the presence of additional identical elements in the process, method, article, or apparatus that comprises the same elements.
In the description of the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" when they are used are to be construed broadly, e.g., as meaning a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; either directly or indirectly through intervening media, or may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood by those skilled in the art from specific situations.
In the description of the present invention, unless otherwise specifically stated or limited, the term "provided" may be used in a broad sense, for example, the object of "provided" may be a part of the body, or may be arranged separately from the body and connected to the body, and the connection may be detachable or non-detachable. The specific meaning of the above terms in the present invention can be understood by those skilled in the art from specific situations.
The present invention will be described in further detail with reference to examples.
Embodiment 1 of the inter-packer safety disconnect system of the present invention:
as shown in fig. 1 and fig. 2, the inter-packer safety disconnection system comprises an inter-packer safety release device 140, the inter-packer safety release device 140 is used for being installed between an upper packer and a lower packer in oil well operation, wherein an upper packer 120 is positioned above the inter-packer safety release device 140 in the two packers, a lower packer 130 is positioned below the inter-packer safety release device 140, the upper packer 120 and the lower packer 130 are connected with a string 150 to form a string of a well-entering string (shown in fig. 1), and a central pipe extending up and down is arranged in the middle of each packer, and the central pipe is used for being in threaded connection with the inter-packer safety release device.
As shown in fig. 2, the inter-packer safety releasing device comprises a locking claw barrel 10 extending in the up-down direction, an upper joint 40 is screwed on the upper end of the locking claw barrel 10, an inner thread section 41 is arranged on the upper end of the upper joint 40, and the upper joint 40 is in threaded connection with a central pipe of an upper packer 120 through the inner thread section 41. At least two boss locking claws 16 protruding outwards are arranged at the lower end of the locking claw barrel 10 along the circumferential direction, in this embodiment, the number of the boss locking claws 16 may be two, three, four or more, and the specific number needs to be determined according to the actual use requirement. At least two shrinkage joints (not shown in the figure) which extend along the up-down direction and are communicated with the inner cavity of the locking claw barrel 10 are arranged on the boss locking claw 16, the number of the shrinkage joints can be two, three or more, and the specific number needs to be determined according to actual use requirements.
The outer wall of the locking claw barrel 10 is provided with a downward annular boss 13, and the annular boss 13 is located above the boss locking claw 16, as shown in fig. 3, the side wall of the locking claw barrel 10 located below the annular boss 13 is provided with a rectangular key groove 14. The outer part of the locking claw cylinder 10 below the annular boss 13 is slidably fitted with a lower releasing cylinder 20, and the upper inner wall of the lower releasing cylinder 20 is adapted to be slidably fitted with the outer part of the locking claw cylinder 10. As shown in fig. 3, the upper end of the lower releasing barrel 20 is provided with a rectangular key body 21 adapted to the rectangular key groove 14, when the lower releasing barrel 20 is assembled, the lower releasing barrel 20 can slide upwards along the locking pawl barrel 10 until the rectangular key groove 14 is matched and connected with the rectangular key body 21, the rectangular key body 21 and the rectangular key groove 14 form a spline structure for matching and connecting the lower releasing barrel 20 and the locking pawl barrel 10, and at this time, the locking rotation between the locking pawl barrel 10 and the lower releasing barrel 20 can be realized through the matching of the rectangular key groove 14 and the rectangular key body 21, so that the torque can be transmitted between the two, and the upward sliding of the lower releasing barrel 20 can be blocked through the annular boss 13. The lower end of the lower releasing barrel 20 is provided with an external thread section 24, the external thread section 24 is used for being in threaded fit connection with a central pipe of the lower packer 130, so that the lower releasing barrel 20 is in threaded fit connection with the central pipe of the lower packer 130 through the external thread section 24, and connection of the lower releasing barrel 20 and the lower packer 130 can be achieved.
As shown in fig. 2, the inner wall of the lower releasing barrel 20 is provided with a locking groove 22 corresponding to the boss locking claw 16, when the lower releasing barrel 20 slides upwards to the position where the rectangular keyway 14 is matched with the rectangular key body 21, the boss locking claw 16 is in a position where the boss locking claw 16 can swing outwards to be clamped into the locking groove 22, at this time, the upper side portion of the boss locking claw 16 is in blocking fit with the upper side wall of the locking groove 22, so that the lower releasing barrel 20 can be prevented from falling downwards from the locking claw barrel 10, and at this time, the annular boss 13 can block the upward movement of the lower releasing barrel 20, so that the locking claw barrel 10 and the lower releasing barrel 20 can be prevented from shaking up and down through the blocking fit of the boss locking claw 16 and the locking groove 22 and the blocking of the annular boss 13 on the upward movement of the lower releasing barrel 20, and the stability of connection between the two can be ensured. In addition, the upper side of the boss locking claw 16 is an inclined plane which is inclined from bottom to top and inwards along the radial direction of the locking claw barrel 10, the upper side wall of the locking groove 22 is an inclined plane matched with the inclined plane, and the boss locking claw 16 can conveniently enter the locking groove 22 and can conveniently exit from the locking groove 22 upwards through the matching of the two inclined planes.
As shown in FIG. 2, an inner bushing 30 is slidably assembled in the claw locking barrel 10, the inner bushing 30 is of a barrel structure, and the inner diameter of the inner bushing 30 is slightly smaller than the inner diameter of a central pipe of the packer by 2-3 mm. Be equipped with two shear pin holes 12 along the radial inward extension of a lock claw section of thick bamboo 10 on the lock claw section of thick bamboo 10 at least, a plurality of shear pin holes 12 are arranged along the even interval of circumferencial direction of a lock claw section of thick bamboo 10 outer wall, and shear pin hole 12 is the internal thread hole, a lock claw section of thick bamboo 10 is equipped with shear pin 90 through shear pin hole 12 screw thread, be equipped with locking groove 33 that corresponds with shear pin hole 12 on the outer wall of bush 30, locking groove 33 is the rectangular channel, locking groove 33 supplies the tip entering of shear pin 90 of screw thread assembly in shear pin hole 12, and the cooperation through shear pin 90 tip and locking groove 33, can make and not produce relative movement between a lock claw section of thick bamboo 10 and the bush 30, can realize being connected of a lock claw section of thick bamboo 10 and bush 30 through the cooperation of shear pin 90 tip and locking groove 33 promptly.
The outer wall of the upper end of the inner bushing 30 is provided with an upper end platform 31 which protrudes outwards and is of an annular structure, the inner wall of the locking claw barrel 10 is provided with a stopping platform 11 which is located above the shear pin hole 12, when the locking claw barrel 10 is connected with the inner bushing 30 through the shear pin 90, the stopping platform 11 is located below the upper end platform 31, the stopping platform 11 is used for stopping and matching with the upper end platform 31, the stopping platform 11 is located in the middle of the inner wall of the locking claw barrel 10, and the inner diameter of the upper end of the locking claw barrel 10 is slightly larger than the inner diameter of the lower end through the stopping platform 11. The upper end of the inner bushing 30 is a stressed end, when the upper end of the inner bushing 30 is subjected to a downward acting force, and the acting force pushes the inner bushing 30 to move downward to shear the shear pin 90, the inner bushing 30 can slide downward in the pawl barrel 10 due to the fracture and the pressure of the shear pin 90, when the inner bushing 30 slides downward to the upper end table 31 to be matched with the stop table 11 in a stopping manner, the inner bushing 30 stops sliding downward under the action of the stopping matching of the upper end table 31 and the stop table, and therefore the inner bushing 30 is prevented from falling out of the pawl barrel 10.
As shown in fig. 2, the outer wall of the inner sleeve 30 is provided with an annular groove 34 near the lower end of the inner sleeve 30, and the annular groove 34 is used for the boss locking claw 16 to enter. When the inner bushing 30 is located at a position connected with the locking claw barrel 10 through the shear pin 90, the annular groove 34 and the boss locking claw 16 are vertically staggered, at this time, the outer wall of the inner bushing 30 located below the annular groove 34 can outwards support the boss locking claw 16, so that the boss locking claw 16 is kept in the locking groove 22, at this time, the inner bushing 30 is located at a locking position, namely, at the locking position, the annular groove 34 and the boss locking claw 16 are vertically staggered to keep the boss locking claw 16 clamped in the locking groove 22; when the upper end table 31 is in stop fit with the stop table 11, the boss locking claws 16 are arranged corresponding to the annular grooves 34 due to downward movement of the inner bushing 30, at this time, the outer wall of the inner bushing 30 cannot support the boss locking claws 16 outwards to keep the boss locking claws 16 in the locking grooves 22, the annular grooves 34 can avoid inward swinging of the boss locking claws 16, so that the boss locking claws 16 can be conveniently radially inwardly retracted and separated from the locking grooves 22, at this time, the inner bushing 30 is in a release position, that is, when the inner bushing is in the release position, the annular grooves 34 and the boss locking claws 16 are arranged corresponding to each other to enable the boss locking claws 16 to swing inwards into the annular grooves 34.
The inner liner 30 is further provided with a snap spring groove on the outer wall thereof between the annular groove 34 and the locking groove 33, and a snap spring 80 is installed in the snap spring groove, and when the inner liner 30 is in the locking position, the snap spring 80 is compressed between the inner liner 30 and the pawl barrel 10. One side that annular groove 34 is close to the jump ring groove is equipped with from bottom to top and the inclined plane that leans out to this passes through this inclined plane, can make jump ring 80 outwards expand gradually at the in-process of assembly jump ring 80, and also can play the guide effect to the installation of jump ring 80, made things convenient for the installation of jump ring 80 in the jump ring groove.
As shown in fig. 2, a first sealing groove between the locking groove 33 and the snap spring groove is further provided on the outer wall of the inner bushing 30, a first sealing ring 50 is installed in the first sealing groove, and the first sealing ring 50 can realize the sealing between the locking pawl cylinder 10 and the inner bushing 30. The lower end of the inner bushing 30 extends downwards to form the locking claw cylinder 10 and enters the lower releasing cylinder 20, a second sealing groove is formed in the outer wall of the end portion of the lower end of the inner bushing 30, a second sealing ring 60 is installed in the second sealing groove, an annular sealing table 23 corresponding to the first sealing groove is arranged on the inner wall of the lower releasing cylinder 20, sealing between the inner wall of the lower releasing cylinder 20 and the outer wall of the inner bushing 30 can be achieved through the second sealing ring 60 installed in the second sealing groove, and the first sealing ring 50 and the second sealing ring 60 are respectively arranged on the upper side and the lower side of the annular groove 34. In addition, as shown in fig. 2, a third seal groove is provided on the outer wall of the locking pawl cylinder 10 between the annular boss 13 and the boss locking pawl 16, and a third seal ring 70 is installed in the third seal groove, so that the locking pawl cylinder 10 and the lower releasing cylinder 20 can be sealed by the third seal ring 70. When the neck bush 30 is in the locking position, the first sealing ring 50, the second sealing ring 60, the third sealing ring 70, the neck bush 30, the locking claw barrel 10 and the lower releasing barrel 20 are matched to form a closed inner cavity, at the moment, the boss locking claw 16 is located in the closed inner cavity, and external impurities, precipitates, scales and the like can be prevented from entering the closed inner cavity through the closed inner cavity, so that the influence of external factors on the boss locking claw 16 is avoided, and the normal deformability of the boss locking claw 16 is ensured. Here, the first seal ring 50, the second seal ring 60, and the third seal ring 70 are all rubber seal rings.
As shown in FIG. 4, the inter-packer safety disconnection system further comprises a releasing rod device matched with the inter-packer safety releasing device, the releasing rod device comprises a barrel rod 100, the upper end of the barrel rod 100 is provided with a barrel rod upper joint 101 for threaded connection of a pipe column, and the outer diameter of the barrel rod upper joint 101 is larger than that of the barrel rod 100 below the barrel rod upper joint 101. The lower end of the poking rod 100 is provided with an upward limit ring platform 102, the outer diameter of the limit ring platform 102 is slightly larger than the inner diameter of the inner bushing 30, and the lower end of the poking rod 100 is used for pressing the upper end of the inner bushing 30. The upper end port of the inner bush 30 is provided with a conical surface 32, and the lower end of the poking rod 100 is also provided with a conical surface structure matched with the conical surface 32, so that the poking rod 100 which is used for jacking the inner bush 30 can be righted through the conical surface 32 at the upper end port of the inner bush 30, the vertical force application direction of the poking rod 100 to the inner bush 30 can be ensured, the uniformity of the shearing force applied by the inner bush 30 to each shear pin 90 is further ensured, the inner bush 30 can simultaneously shear each shear pin 90, and the normal downward sliding of the inner bush 30 is ensured.
In addition, as shown in fig. 2, a positioning ring groove 15 is further provided on the inner wall of the locking claw cylinder 10, which is close to the lower end of the locking claw cylinder 10, and when the inner bushing 30 is in the locking position, the positioning ring groove 15 is located below the snap spring 80; when the inner bushing 30 is in the disengaged position, the snap spring 80 is located in the positioning ring groove 15 along with the downward sliding of the inner bushing 30, and meanwhile, the snap spring 80 located in the positioning ring groove 15 expands radially outward, and because the upper end of the positioning ring groove 15 has the stopping inner wall 17, the expanded snap spring 80 forms a stopping fit with the stopping inner wall 17 of the positioning ring groove 15. And because the sticking between the poking rod 100 as a metal piece and the inner bushing 30 can be generated after multiple times of collision and jacking, on the basis, the upward action of the poking rod 100 can drive the inner bushing 30 to move upward together, and therefore, the inner bushing 30 can be prevented from being reset upward to a locking position through the blocking matching of the blocking inner wall 17 of the positioning ring groove 15 and the expanded snap spring 80, so that the normal use of the safety release device between the packers and the normal lifting of the upper packer 120 are prevented from being influenced.
As shown in fig. 4, a centering sleeve 110 is sleeved on a barrel 100, and the centering sleeve 110 is slidably assembled on the barrel 100 and is positioned between a barrel upper joint 101 and a limit ring table 102, because the inter-packer safety releasing device is positioned between an upper packer 120 and a lower packer 130, when the barrel 100 presses against the inner bushing 30, the barrel 100 needs to pass through the upper packer 120, when the barrel 100 passes through a central tube of the upper packer 120, the centering sleeve 110 can center the barrel 100 when being lowered, so that the barrel 100 can be ensured to pass through the upper packer 120 smoothly, the work efficiency is improved, and when the work is reduced, the damage of the barrel 100 to the upper packer 120 can be reduced. In addition, the outer diameter of the centering sleeve 110 is 6-8 mm smaller than the inner diameter of the pipe column 150.
The working principle of the safety releasing device between the packers is as follows:
when the upper packer 120 can be normally unset and the lower packer 130 is stuck, the lost-motion rod device is lowered through the pipe string 150, under the centering action of the centering sleeve 110, the rod 100 penetrates through the central pipe of the upper packer 120 and the upper joint 40 to enter the locking jaw cylinder 10 to jack the upper end of the inner bushing 30, downward acting force is applied to the upper end of the inner bushing 30, under the action of the acting force, the shear pin 90 which keeps the inner bushing 30 at the locking position is sheared, the inner bushing 30 slides downwards under the action of the pressure until the inner bushing 30 is located at the unlocking position, at the moment, the boss locking jaw 16 which is clamped in the locking groove 22 is arranged corresponding to the annular groove 34, and when the locking jaw cylinder 10 is pulled upwards, the boss locking jaw 16 is separated from the locking groove 22 and swings inwards to the annular groove 34, so that the locking jaw cylinder 10 and the lower releasing cylinder 20 can be separated upwards and downwards, further, the fishing of the upper packer 120 is realized, and simultaneously, the blocked lower packer 130 is conveniently milled.
In the safety releasing device between packers, the boss locking claw is positioned at the lower end part of the locking claw barrel, so that the inward deformation capability of the boss locking claw can be increased, the inward deformation capability of the boss locking claw can be ensured even if the safety releasing device is used for a long time, namely, the normal up-down separation between the locking claw barrel and the lower releasing barrel can be ensured, and the normal use of the safety releasing device between packers is further ensured. In addition, the releasing rod device matched with the safety releasing device between the packers is arranged, so that the problems that sealing elements like sealing balls cannot be thrown due to the fact that a pipe column is not smooth and a hydraulic safety releasing device cannot bear pressure due to the fact that the pipe column is broken and leaked can be solved by jacking the inner lining of a poking rod of the releasing rod device, and normal realization of the releasing function of the safety releasing device between the packers and normal starting of the packers can be guaranteed.
Embodiment 2 of the inter-packer safety disconnect system of the present invention:
this embodiment differs from embodiment 1 in that in embodiment 1 the centering sleeve 110 is slidably mounted on the barrel 100 and the lower end of the barrel 100 is provided with an upwardly directed stop collar 102 to prevent the centering sleeve 110 from sliding downwardly off the barrel 100. In this embodiment, the centering sleeve 110 is fixedly disposed on the barrel 100, and the position of the centering sleeve 110 on the barrel 100 does not affect the pressing of the barrel 100 through the upper packer 120 on the inner bushing 30, and the upward stop ring 102 may not be disposed at the lower end of the barrel 100.
Embodiment 3 of the inter-packer safety disconnect system of the present invention:
this embodiment is different from embodiment 1 in that in embodiment 1, a barrel 100 is sleeved with a centering sleeve 110, and the centering sleeve 110 is used for centering the barrel 100 when the barrel 100 is lowered. In this embodiment, the rod 100 is not provided with the centering sleeve 110 for centering the rod 100, and at this time, the rod 100 is ensured to pass through the upper packer 120 smoothly to press the inner liner 30 mainly by operation.
Example 4 of the inter-packer safety disconnect system of the utility model:
the difference between this embodiment and embodiment 1 is that in embodiment 1, a downward annular boss 13 is provided on the outer wall of the locking claw cylinder 10, and the upward sliding of the lower releasing cylinder 20 can be stopped by the stop fit between the annular boss 13 and the upper end of the lower releasing cylinder 20. In this embodiment, the annular boss 13 is eliminated, and at this time, when the boss locking claw 16 is locked in the locking groove 22, the lower releasing barrel 20 can move upward relative to the locking claw barrel 10, but it is sufficient that the lower releasing barrel 20 cannot be disengaged downward.
Example 5 of the inter-packer safety disconnect system of the present invention:
the present embodiment is different from embodiment 1 in that in embodiment 1, a tapered surface 32 for centering the biasing member is provided at an upper end port of the inner hub 30. In this embodiment, a section of the poking rod 100 having an outer diameter slightly smaller than the inner diameter of the inner bushing 30 is disposed at the lower end of the poking rod 100, and a downward annular stop is disposed above the poking rod section, so that when the poking rod 100 presses the inner bushing 30, the poking rod section enters the inner bushing 30 to ensure that the poking rod 100 can move vertically downward, i.e., to right the poking rod 100, and to apply a downward force to the inner bushing 30 through the annular stop. In other embodiments, no structure is provided on the inner liner 30 or on the barrel 100 to right the barrel 100, but rather operation is relied upon primarily to ensure that the barrel 100 applies a vertically downward force to the inner liner 30.
Example 6 of the inter-packer safety disconnect system of the present invention:
the difference between this embodiment and embodiment 1 is that, in embodiment 1, one side of the annular groove 34 close to the snap spring 80 is provided with an inclined surface that inclines from bottom to top and outwards, and at this time, the snap spring 80 can be gradually expanded through the inclined surface, so as to facilitate the installation of the snap spring 80 on the inner liner 30. In the embodiment, one side of the groove close to the snap spring 80 is a horizontal plane perpendicular to the axis of the inner bushing 30, and at this time, when the snap spring 80 is installed, the inner diameter of the snap spring 80 can only be expanded to be the same as the outer diameter of the inner bushing 30 once.
Example 7 of the inter-packer safety disconnect system of the utility model:
the difference between this embodiment and embodiment 1 is that in embodiment 1, the expanded circlip 80 prevents the inner bushing 30 from returning upward to the locking position by the stop engagement with the stop inner wall 17 at the upper end of the positioning ring groove 15. In the present embodiment, the inner bushing 30 is not reset to the locking position for stopping, so that the number of times of collision and pressing between the metal force applying member and the inner bushing 30 is reduced as much as possible.
Example 8 of the inter-packer safety disconnect system of the present invention:
the present embodiment is different from embodiment 1 in that, in embodiment 1, the upper end inner wall of the lock groove 22 and the upper end side wall of the boss lock claw 16 are provided with mutually adapted inclined surfaces. In this embodiment, the inner wall of the upper end of the locking groove 22 is provided with an inclined surface, or the side wall of the upper end of the boss locking claw 16 is provided with an inclined surface. In other embodiments, the inclined surface may be eliminated when the elastic force of the boss locking claw 16 is good.
Example 9 of the inter-packer safety disconnect system of the present invention:
the difference between this embodiment and embodiment 1 is that in embodiment 1, when the inner sleeve 30 is in the locking position, the first seal ring 50, the second seal ring 60, the third seal ring 70, the inner sleeve 30, the pawl barrel 10, and the lower releasing barrel 20 cooperate to form a closed cavity, and the boss pawl 16 is located in the closed cavity. In the embodiment, the boss locking claw 16 is not positioned in the closed inner cavity, and at this time, in order to ensure that the boss locking claw 16 has normal deformability, the safety releasing device between packers needs to be lifted out within a specified time.
The embodiment of the safety releasing device between the packers comprises the following steps: the specific structure of the inter-packer safety releasing device is the same as that of the inter-packer safety disconnecting system in the embodiment of the inter-packer safety disconnecting system, and the detailed description is omitted here. Wherein, the packer is provided with a releasing device which can be pressed by a poking rod to release or throw balls to release.
The above description is only a preferred embodiment of the present invention, and not intended to limit the present invention, the scope of the present invention is defined by the appended claims, and all structural changes that can be made by using the contents of the description and the drawings of the present invention are intended to be embraced therein.

Claims (10)

1. A safe releasing device between packers is characterized by comprising a locking claw barrel (10), wherein the upper end of the locking claw barrel (10) is provided with an upper joint (40) connected with an upper packer (120), the outer part of the lower end of the locking claw barrel (10) is assembled with a lower releasing barrel (20) connected with a lower packer (130) in a sliding manner, and the lower releasing barrel (20) is matched with the locking claw barrel (10) through a spline plug bush to realize rotation stopping; at least two boss locking claws (16) are arranged at the end part of the lower end of the locking claw barrel (10) at intervals along the circumferential direction, locking grooves (22) corresponding to the boss locking claws (16) are formed in the inner wall of the lower releasing barrel (20), the boss locking claws (16) are used for being clamped into the locking grooves (22) to prevent the lower releasing barrel (20) from falling off downwards from the locking claw barrel (10), and the boss locking claws (16) can be radially inwards folded to be separated from the locking grooves (22) and enable the locking claw barrel (10) and the lower releasing barrel (20) to be separated from each other up and down; an inner bushing (30) is assembled in the pawl locking barrel (10) in a sliding mode, and an annular groove (34) is formed in the outer wall of the inner bushing (30); the inner bushing (30) is provided with an annular groove (34) and a boss locking claw (16), the annular groove (34) and the boss locking claw (16) are vertically staggered to keep the boss locking claw (16) at a locking position clamped in the locking groove (22), the annular groove (34) and the boss locking claw (16) are correspondingly arranged to enable the boss locking claw (16) to swing inwards to a releasing position in the annular groove (34), a shear pin (90) used for keeping the inner bushing (30) at the locking position is arranged between the locking claw barrel (10) and the inner bushing (30), and the boss locking claw (16) can be outwards supported and kept in a state clamped in the locking groove (22) when the inner bushing (30) is at the locking position.
2. The inter-packer safety release device of claim 1, wherein a lower end of the inner sleeve (30) penetrates into the lower release barrel (20), a first sealing ring (50) is arranged between the inner bushing (30) and the locking claw barrel (10), a second sealing ring (60) is arranged between the inner bushing (30) and the lower releasing barrel (20), the first sealing ring (50) and the second sealing ring (60) are respectively arranged at the upper side and the lower side of the annular groove (34), a third sealing ring (70) is arranged between the locking claw barrel (10) and the lower releasing barrel (20), when the inner bushing (30) is in the locking position, the first sealing ring (50), the second sealing ring (60), the third sealing ring (70), the inner bushing (30), the locking claw barrel (10) and the lower releasing barrel (20) are matched to form a closed inner cavity, and the boss locking claw (16) is located in the closed inner cavity.
3. The packer safety release device according to claim 1 or 2, wherein at least one of the inner upper end wall of the lock groove (22) and the upper end side wall of the boss lock claw (16) is provided with an inclined surface for urging the boss lock claw (16) to be retracted when the inner bush (30) is in the release position and the upper jaw cylinder (10) is lifted.
4. The packer safety release device according to claim 1 or 2, wherein a snap spring groove is formed in the outer periphery of the inner bushing (30) above the annular groove (34), a snap spring (80) is installed in the snap spring groove, a positioning ring groove (15) is formed in the inner wall of the pawl barrel (10), and when the inner bushing (30) is in the locking position, the snap spring (80) is compressed between the pawl barrel (10) and the inner bushing (30); when the inner bushing (30) is in the releasing position, the clamp spring (80) moves into the positioning ring groove (15) and expands outwards in the radial direction, the upper end of the positioning ring groove (15) is provided with a stopping inner wall (17), and the stopping inner wall (17) is used for being matched with the expanded clamp spring (80) in a vertically stopping manner so as to prevent the inner bushing (30) from returning upwards to the locking position.
5. The inter-packer safety release device according to claim 4, characterized in that a side of the annular groove (34) close to the clamp spring (80) is provided with a slope which inclines from bottom to top and outwards.
6. The packer safety release device according to claim 1 or 2, wherein the inner sleeve (30) is provided at its upper end port with a tapered surface (32) for centering the force applying member.
7. The packer safety release device according to claim 1 or 2, wherein the outer wall of the locking claw barrel (10) is provided with a downward annular boss (13), and the annular boss (13) is used for being in stop fit with the upper end face of the lower release barrel (20) when the inner bushing (30) is in the locking position.
8. An inter-packer safety disconnection system, comprising an inter-packer safety release device according to any one of claims 1 to 7 and a release rod device adapted to the inter-packer safety release device, wherein the release rod device comprises a barrel rod (100), the upper end of the barrel rod (100) is provided with a barrel rod upper joint (101) for connecting a pipe string (150), and the barrel rod (100) is used for pressing an inner bushing (30) of the inter-packer safety release device.
9. The inter-packer safety disconnect system of claim 8, wherein the barrel (100) is sleeved with a centering sleeve (110), the centering sleeve (110) being adapted to center the barrel (100) when the barrel (100) is lowered.
10. The inter-packer safety disconnect system of claim 9, wherein the lower end of the barrel (100) is provided with an upward stop ring land (102), and the centering sleeve (110) is slidably fitted over the barrel (100) between the barrel top sub (101) and the stop ring land (102).
CN202220153712.7U 2022-01-20 2022-01-20 Safe releasing device between packers and safe disconnection system between packers Active CN216714335U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202220153712.7U CN216714335U (en) 2022-01-20 2022-01-20 Safe releasing device between packers and safe disconnection system between packers

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202220153712.7U CN216714335U (en) 2022-01-20 2022-01-20 Safe releasing device between packers and safe disconnection system between packers

Publications (1)

Publication Number Publication Date
CN216714335U true CN216714335U (en) 2022-06-10

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Family Applications (1)

Application Number Title Priority Date Filing Date
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Country Status (1)

Country Link
CN (1) CN216714335U (en)

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