CN203321426U - Downward strike type stuck freeing packer - Google Patents
Downward strike type stuck freeing packer Download PDFInfo
- Publication number
- CN203321426U CN203321426U CN2013202896698U CN201320289669U CN203321426U CN 203321426 U CN203321426 U CN 203321426U CN 2013202896698 U CN2013202896698 U CN 2013202896698U CN 201320289669 U CN201320289669 U CN 201320289669U CN 203321426 U CN203321426 U CN 203321426U
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- central tube
- inner central
- central pipe
- packer
- force
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- 230000007246 mechanism Effects 0.000 claims abstract description 25
- 230000005484 gravity Effects 0.000 claims abstract description 6
- 230000003116 impacting effect Effects 0.000 claims description 9
- 230000002093 peripheral effect Effects 0.000 claims description 4
- 238000010009 beating Methods 0.000 claims description 2
- 238000012856 packing Methods 0.000 abstract description 29
- 238000004873 anchoring Methods 0.000 abstract description 24
- 238000004519 manufacturing process Methods 0.000 abstract description 3
- 230000003578 releasing effect Effects 0.000 description 5
- 230000008602 contraction Effects 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 238000007789 sealing Methods 0.000 description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 238000003466 welding Methods 0.000 description 3
- 241000239290 Araneae Species 0.000 description 2
- 230000002457 bidirectional effect Effects 0.000 description 2
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 230000001737 promoting effect Effects 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 125000006850 spacer group Chemical group 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 238000013475 authorization Methods 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- IXSZQYVWNJNRAL-UHFFFAOYSA-N etoxazole Chemical compound CCOC1=CC(C(C)(C)C)=CC=C1C1N=C(C=2C(=CC=CC=2F)F)OC1 IXSZQYVWNJNRAL-UHFFFAOYSA-N 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
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Abstract
The utility model relates to a downward strike type stuck freeing packer. The downward strike type stuck freeing packer comprises an upper joint, a central pipe and an anchoring mechanism arranged on the periphery of the central pipe, the anchoring mechanism comprises a slip and a lower cone, the lower cone prevents the slip from resetting during packing and does not stop the slip during packing freeing, the central pipe comprises an outer central pipe and an inner central pipe, the upper end of the outer central pipe is fixedly connected with the upper joint, the upper end of the inner central pipe is provided with a strike stress part used for receiving downward strike force, the inner central pipe is fixedly connected with the lower cone, and a locking mechanism is arranged between the inner central pipe and the outer central pipe. When the locking mechanism is locked, the inner central pipe is hung on a step inside the upper joint to enable the lower cone to stop the slip; when the locking mechanism is unlocked, the inner central pipe presses the strike stress part downwards by means of gravity, and the inner central pipe drives the lower cone to move downwards relatively to eliminate stop of the slip when the upper joint is lifted up. According to the downward strike type stuck freeing packer, as a telescopic sleeve mechanism is adopted, reset space of the slip and a rubber barrel is conveniently given, the structure is simple and compact, processing and manufacturing are facilitated, and cost is lowered.
Description
Technical field
The utility model relates to a kind of packer, relates in particular under a kind of and hits formula unfreezing packer.
Background technology
At present, the oil-water well shutoff anchor tool used of giving up in water plugging string mostly is single slips Bidirectional anchoring packer, its deblocking releasing mode cuts off the deblocking pin while basically adopting the upper lifting pipe post, visible this deblocking mode all is added into the shear strength of deblocking pin and fishing string own wt and puies forward deblocking power, especially in deep-well is salvaged, the deadweight of oil pipe has significantly increased deblocking releasing strength, causes operation deblocking difficulty, usually causes heavy repair task; Secondly, when the give up power that occurs giving up of tubing string is unexpected when excessive, easily cause the unexpected deblocking of packer, make the measure operation invalid.
For the problems referred to above, the Chinese patent " a kind of Bidirectional anchoring packer " that notice of authorization number is CN 2535549Y discloses the mode of hitting under a kind of the employing makes the deblocking pin cut off the packer of realizing deblocking, this packer comprise top connection and for when setting for the anchor mechanism with borehole wall grappling, described anchor mechanism comprises for the slips with borehole wall grappling, fixing to stop that slips resets with relative top connection when the packer setting for promote upper cone that slips moves down when setting, when deblocking, relative top connection moves down to remove the lower cone that slips is stopped, lower cone is connected with lower contact by stretching structure, when deblocking, slips resets needs certain elongate space, realize by telescoping mechanism that lower cone moves down in this patent and abdicate the slips required space that resets, and the telescoping mechanism that it adopts needs the combination of a plurality of parts, the structure very complicated, the process and assemble difficulty.
The utility model content
The purpose of this utility model is to propose under a kind of to hit formula unfreezing packer, to overcome the baroque problem of removing seal for packer in prior art.
For addressing the above problem, the technical solution adopted in the utility model is:
Hit formula unfreezing packer under a kind of, comprise top connection, the central tube that axis extends along the vertical direction and be arranged at the anchor mechanism of central tube periphery, anchor mechanism comprises that slips and relative top connection when the packer setting are fixing to stop that slips resets, when deblocking, relative top connection moves down to remove the lower cone that slips is stopped, described central tube comprises the inner central tube that exterior central tube and its slides within install, the upper end of described exterior central tube is fixedly connected with top connection, described inner central tube upper end is provided with the part of the force that impacts of downward impact force that the beating unit for accepting to enter from top connection applies inner central tube, the lower end of inner central tube is stretched out exterior central tube and is fixedly connected with described lower cone, in, be provided with between exterior central tube described and remove internally when impacting part of the force and being impacted, the locking of exterior central tube fix and described when impacting part of the force and not impacted will in, the lockable mechanism that the exterior central tube locking is fixing, described inner central tube contracts in exterior central tube to keep lower cone to the stopping of slips when the lockable mechanism locking, and described inner central tube presses down and impacts part of the force so that the relative top connection of inner central tube drive lower cone moves down to remove stopping slips by gravity when the lockable mechanism release.
Described lockable mechanism comprise that the inner central tube upper end arranges circumferentially and the spring detent that radially shrinks or open, be threaded onto vertically the supporter between spring detent, be located at and on the top connection inner peripheral surface with spring detent under open configuration, coordinate the step surface that stops inner central tube to move down at the above-below direction block, described supporter has the lower fitting face that struts spring detent of arranging from bottom to top, allow open position so that the upper fitting face that spring detent shrinks, describedly impact the head portion that part of the force is supporter, described supporter is fixedly connected on inner central tube by the deblocking pin when impacting part of the force and not impacted and following fitting face struts spring detent described, described supporter cuts off described impacting when part of the force is impacted that the deblocking pin moves down by gravity and above fitting face gets out of the way spring detent and shrinks.
Described supporter is lower thick thin multidiameter, the side face that the large end that lower fitting face is multidiameter is divided, the side face of the small end part that upper fitting face is multidiameter, be fixed with block on above-below direction in top connection and coordinate the door that stops supporter and inner central tube to move up, door is provided with and supplies the described centre bore that part of the force upwards passes door that impacts.
Be provided with between described exterior central tube and inner central tube and drive relative the moving down after putting in place of lower cone at inner central tube inner central tube is carried out to the spacing Stop structure of anticreep block.
Described Stop structure is the step surface that the mutual block that arranges on described exterior central tube inwall and inner central tube outer wall coordinates.
Hit formula unfreezing packer under the utility model proposes, when deblocking, adopt the part of the force that impacts of under fishing tool, hitting core barrel, lockable mechanism between inside and outside central tube is disengaged, in the tubing string process of upper body, inner central tube drives the relative top connection of lower cone and moves down under Action of Gravity Field, thereby remove, to stopping of slips, slips is resetted.Packer of the present utility model under hit under the formula active force and realize deblocking, the deblocking stretching structure adopts inner central tube and exterior central tube extending or that shrink to form telescopic sleeve structure, be convenient to abdicate the slips reset space when deblocking, the deblocking stretching structure is simply compact, be convenient to processing and manufacturing, reduce production costs.
Further, adopt the step surface cooperatively interacted to realize block, be convenient to control and the calculating of inner central tube extension elongation.
The accompanying drawing explanation
Fig. 1 hits the structural representation of the embodiment of formula unfreezing packer under a kind of in the utility model.
The specific embodiment
The embodiment that hits formula unfreezing packer under a kind of of the present utility model: as shown in Figure 1, comprise the top connection 1 of upper end and the lower cone 25 of lower end, the upside of lower cone 25 periphery walls is the up-small and down-big conical surface, be coated with the central tube that axis extends along the vertical direction in top connection, central tube comprises the inner central tube 19 that exterior central tube 18 and its slides within install, exterior central tube upper end and the screwed connection of top connection lower end, inner central tube lower end and lower cone screwed connection, offer interior step surface 17 on the inwall of exterior central tube, the below of exterior central tube periphery wall is provided with when deblocking for lifting the outer step surface of upper cone, offer inlet opening on exterior central tube, offer the outer step surface 8 coordinated with interior step surface 17 blocks of exterior central tube on the inner central tube outer wall, distance between the lower surface of interior step surface 17 upper surfaces of exterior central tube and the outer step surface 8 of inner central tube be more than or equal to the compression of packing element and bidirectionally anchoring slip spider card required apart from sum, the inner central tube upper end is provided with can be along its radial contraction or the spring detent opened, outside being provided with, the spring detent end turns edge 3, turn edge outward and coordinate with the interior step surface block arranged on the top connection inwall, the outer step surface of inner central tube is positioned at the spring detent root, in spring detent, be coated with for making spring detent make outside it in open configuration the supporter 26 that turns edge and coordinate with the interior step block of top connection, supporter is fixed on inner central tube 19 by deblocking pin 27, between supporter 26 periphery walls and inner central tube inwall, for glade plane space, coordinate, the supporter upper end is for accepting the part of the force that impacts of deblocking impact force, supporter 26 has lower thick thin multidiameter, the lower fitting face of lower end outer peripheral face for opening for the support spring pawl that the supporter diameter is larger, the upper end outer peripheral face that the supporter diameter is less is used for getting out of the way the lower fitting face of spring detent shrink space after supporter glides, the outside of top connection lower end has been threaded connection cylinder sleeve 4 and has adopted the sealing ring sealing, be provided with block on above-below direction in annular space between supporter and top connection and coordinate the door 2 that stops supporter and inner central tube to move up, door is the centre bore that part passes that impacts had for supporter top, door adopts screw thread to be connected with top connection, door can also be connected with top connection by modes such as welding or riveted joints, be provided with the lock ring seat 9 be set on the exterior central tube outer wall in the annular space that upper cylinder sleeve and exterior central tube form, the lock ring seat is that upper end diameter is little, the open column shape structure that lower end diameter is large, the less end of lock ring seat diameter is provided with intake chamber, the lock ring seat is provided with the middle part limited step 28 that moves down distance for limiting upper piston, distance between the lower surface of upper piston 5 and middle part limited step 28 is more than or equal to packing element maximum compression distance and bidirectionally anchoring slip spider card apart from sum, be coated with lock tube 7 in annular space between upper cylinder sleeve and lock ring seat, offer drain tank or sluicing duct 6 on lock tube, be provided with upper piston 5 between lock tube upper surface and top connection lower surface, upper piston outer wall and upper cylinder sleeve inner wall sealing are slidably matched, inwall and lock ring seat outer wall sealed sliding are movingly, top, lock tube upper end is pressed on the upper piston lower surface, be provided with the lock tooth on the inwall of lock tube upper end, be arranged with lock ring 11 on the step surface at lock ring seat middle part, the lock ring periphery wall be provided with for described lock tube on the locked lock tooth of lock tooth interlock, the lock ring seat has lock ring 10 in lock ring top screwed connection, lock ring also can pass through pin, rivet, buckle, welding or the step surface that block coordinates mutually are connected with the lock ring seat, top, lock ring lower end is pressed on the leave from office terrace 29 of lock ring seat, the leave from office terrace of lock ring by its below and the lock ring of top are to the lock ring axial limiting, lock ring seat bottom is sealed and matched by sealing ring and lock tube, thereby and form plunger shaft between upper piston, be provided with lower piston 12 in the upper cylinder sleeve of lock ring seat bottom, lower piston 12 is connected with upper cylinder sleeve by the first pin 13, the packing element cover 16 that being provided with between lower piston 12 and exterior central tube 18 is sleeved on exterior central tube, be arranged with three packing elements 14 outside packing element cover 16, between adjacent packing element, adopt spacer ring 15 to separate, the top, upper surface of the packing element 14 of upper end is pressed in the lower piston bottom, top, packing element lower surface, lower end is pressed in the outer upper surface turned edge of packing element cover, packing element, packing element cover and spacer ring form hermetic unit, packing element cover lower end is provided with anchor portion, anchor portion comprises and being connected by screw thread and packing element cover, be set in the upper cone 20 on exterior central tube, lower cone 25 and be located at bidirectionally anchoring slips 23 between the two, the top, upper surface of upper cone is pressed on the outer lower surface turned edge of packing element cover, the periphery wall of upper cone lower end is provided with the upwards conical surface of hole enlargement, the upper cone bottom is provided with bidirectionally anchoring slips 23, the upper and lower side of bidirectionally anchoring slips 23 is being respectively arranged with cone structure and lower cone structure towards inner central tube one side, upper cone structure coordinates with the conical surface guiding of upper cone, lower cone structure coordinates with the conical surface guiding of lower cone, lower cone upper end inwall and exterior central tube are slidably matched, lower end and the inner central tube screwed connection installed in it, the bidirectionally anchoring slips is provided with slip sleeve 22 outward, the slip sleeve inwall is provided with step surface and hangs and be connected with the step surface arranged on the upper cone outer wall by step surface, slip sleeve with on upper cone, also be coated with for being connected both the second pins 21, be provided with the slips spring 24 along inner central tube radial extent or contraction in slip sleeve, slips spring 24 is by the medial launder that is pressed in bidirectionally anchoring slips 23.
During use, above-mentioned packer is connected on the oil pipe of water plugging string, when tubing string is transferred to desired location, start to set, squeeze into liquid from well head, hydraulic coupling is imported the inside of inner central tube 19 and exterior central tube 18 into by down-hole string, by the inlet opening offered on exterior central tube 18 and the intake chamber on lock ring seat 9, enter in plunger shaft again, promoting upper piston 5 and lower piston 12 moves downward, then promoting lock tube 7 moves down, when descending pressure reaches certain value, the first pin 13 is cut off, upper piston, lower piston and lock tube continue to move downward the packing element 14 that promotes the lower piston below and move downward, packing element 14 drives packing element cover 16 reach together, packing element cover 16 moves downward by the outer promotion upper cone 20 that turns edge arranged on it, because adopting the second pin 21, upper cone and slip sleeve be connected, top, bidirectionally anchoring slips upper surface is pressed on the interior step surface of slip sleeve, therefore upper cone 20 drives slip sleeve 22 by the second pin 21, slip sleeve 22 promotes bidirectionally anchoring slips 23 and moves down together, bidirectionally anchoring slips lower end is subject to stopping of lower cone, conical surface guiding along lower cone is slided and makes its lower end outwards open and be anchored on sleeve pipe, upper piston 5 and lower piston 12 continue to move down, when the thrust to upper cone 20 is greater than the shear strength of the second pin 21, the second pin is cut off, now, upper cone 20 continues to move downward, the conical surface of upper cone lower end acts on the upper conical surface of bidirectionally anchoring slips 23, bidirectionally anchoring slips upper end is outwards opened and is anchored on sleeve pipe, complete packer grappling process, now on upper cone 20 conical surface that is pressed against bidirectionally anchoring slips 23 tightly, no longer move, upper piston and lower piston continue reach and constantly oppress packing element 14, thereby make packing element 14 constantly be compressed its axial dimension is shortened gradually, it is large that radial dimension becomes gradually, finally seal the space between oil pipe and sleeve pipe, reach the shutoff purpose, meanwhile, the lock tooth of lock tube 7 upper ends and the lock tooth interlock of lock ring 11 are until finally locked, thereby can prevent packer set complete after packing element 14 resiliences and make packer lose envelope or deblocking automatically.
After having set, when packer bears pressure reduction, strata pressure acts on packing element cover 16 by packing element 14, upper cone 20 is applied downward pressure and the conical surface of upper cone 20 tightly is pressed against on bidirectionally anchoring slips 23, thereby the bidirectionally anchoring slips can not be glided in seat card state all the time, when packer bears lower pressure reduction, the strata pressure acts on lower piston 12 by packing element, lower piston applies upwards active force to lock tube 7, now lock tube and lock ring interlock are locked, lock tube 7 applies upwards active force by lock ring to lock ring, because lock ring is threaded with the lock ring seat, therefore lock tube applies upwards active force by lock ring to the lock ring seat, lock ring seat upwards top presses joint, top connection lifts outer the turning edge of central tube upper end spring detent by interior step surface, due to central tube and lower cone screwed connection, therefore lower cone is applied upwards active force and the conical surface of lower cone is pressed on 23 times conical surfaces of bidirectionally anchoring slips, thereby make the 23 lower end grapplings of bidirectionally anchoring slips more firmly and not can go up cunning.
During deblocking, the fishing string be lowered to carries fishing tool and presses down the supporter 26 in top connection 1, cut off deblocking pin 27 under the downforce effect, supporter 26 moves down certain distance along inner central tube, releasing is to the supporting role of the spring detent of inner central tube 19 upper ends and make the spring detent can radial contraction, the upper lifting pipe post, tubing string drives in top connection 1 and moves, thereby force the spring detent of inner central tube 19 upper ends along its radial contraction, the relative top connection of lower cone that inner central tube drives its underpart connection moves down, until the outer step surface 8 of inner central tube 19 hangs on the interior step surface 17 of described exterior central tube 18, now, between top connection and lower cone, distance is pulled open, because the distance between the interior step surface 17 of the outer step surface 8 of inner central tube and exterior central tube 18 is more than or equal to packing element resilience and bidirectionally anchoring slips, reset required apart from sum, for packing element 14 and bidirectionally anchoring slips 23 deblocking releasings are abdicated space, packing element resilience deblocking, continue the upper lifting pipe post, the drive exterior central tube moves up, step surface on the exterior central tube periphery wall lifts upper cone 20, upper cone drives slip sleeve 22 and moves upward until the bidirectionally anchoring slips resets, complete the deblocking releasing process.
Lockable mechanism is the spring detent that the inner central tube upper end arranges in the present embodiment, be set with the supporter coordinated with the top connection block for the support spring pawl opens it in spring detent, supporter and inner central tube adopt the deblocking pin to fix, in other embodiment of the present utility model, supporter and spring detent can also be set, and adopt the deblocking pin to be connected inner central tube and exterior central tube, make the inner central tube upper end for impacting part of the force, when deblocking, only need apply downward impact force to the part of the force that impacts of inner central tube upper end, thereby the deblocking pin is cut off to the relative motion that can realize inner central tube and exterior central tube and deblocking, also can make inner central tube and exterior central tube adopt the mode of interference fit to be set with, under only needing when deblocking the power of hitting be greater than interference fit between the two and the frictional force that produces can make inner central tube and exterior central tube relative motion and the time lockable mechanism remove.
Exterior central tube and top connection screwed connection in the present embodiment, inner central tube and lower cone screwed connection also can all adopt the mode of riveted joint, welding or interference fit to connect in other embodiment of the present utility model.
The interior step surface of the exterior central tube that Stop structure is mutual block cooperation in the present embodiment and the outer step surface of inner central tube also can adopt exterior central tube and inner central tube to be set to the conical pipe structure that conical surface block coordinates in other embodiment of the present utility model.
Claims (5)
1. hit formula unfreezing packer under one kind, comprise top connection, the central tube that axis extends along the vertical direction and be arranged at the anchor mechanism of central tube periphery, anchor mechanism comprises that slips and relative top connection when the packer setting are fixing to stop that slips resets, when deblocking, relative top connection moves down to remove the lower cone that slips is stopped, it is characterized in that: described central tube comprises the inner central tube that exterior central tube and its slides within install, the upper end of described exterior central tube is fixedly connected with top connection, described inner central tube upper end is provided with the part of the force that impacts of downward impact force that the beating unit for accepting to enter from top connection applies inner central tube, the lower end of inner central tube is stretched out exterior central tube and is fixedly connected with described lower cone, in, be provided with between exterior central tube described and remove internally when impacting part of the force and being impacted, the locking of exterior central tube fix and described when impacting part of the force and not impacted will in, the lockable mechanism that the exterior central tube locking is fixing, described inner central tube contracts in exterior central tube to keep lower cone to the stopping of slips when the lockable mechanism locking, and described inner central tube presses down and impacts part of the force so that the relative top connection of inner central tube drive lower cone moves down to remove stopping slips by gravity when the lockable mechanism release.
2. under according to claim 1, hit formula unfreezing packer, it is characterized in that: described lockable mechanism comprise that the inner central tube upper end arranges circumferentially and the spring detent that radially shrinks or open, be threaded onto vertically the supporter between spring detent, be located at and on the top connection inner peripheral surface with spring detent under open configuration, coordinate the step surface that stops inner central tube to move down at the above-below direction block, described supporter has the lower fitting face that struts spring detent of arranging from bottom to top, allow open position so that the upper fitting face that spring detent shrinks, describedly impact the head portion that part of the force is supporter, described supporter is fixedly connected on inner central tube by the deblocking pin when impacting part of the force and not impacted and following fitting face struts spring detent described, described supporter cuts off described impacting when part of the force is impacted that the deblocking pin moves down by gravity and above fitting face gets out of the way spring detent and shrinks.
3. under according to claim 2, hit formula unfreezing packer, it is characterized in that: described supporter is lower thick thin multidiameter, the side face that the large end that lower fitting face is multidiameter is divided, the side face of the small end part that upper fitting face is multidiameter, be fixed with block on above-below direction in top connection and coordinate the door that stops supporter and inner central tube to move up, door is provided with and supplies the described centre bore that part of the force upwards passes door that impacts.
4. hit formula unfreezing packer under described according to any one in claim 1～3, it is characterized in that: be provided with between described exterior central tube and inner central tube and drive relative the moving down after putting in place of lower cone at inner central tube inner central tube is carried out to the spacing Stop structure of anticreep block.
5. hit formula unfreezing packer under according to claim 4, it is characterized in that: described Stop structure is the step surface that the mutual block that arranges on described exterior central tube inwall and inner central tube outer wall coordinates.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013202896698U CN203321426U (en) | 2013-05-24 | 2013-05-24 | Downward strike type stuck freeing packer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013202896698U CN203321426U (en) | 2013-05-24 | 2013-05-24 | Downward strike type stuck freeing packer |
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| Publication Number | Publication Date |
|---|---|
| CN203321426U true CN203321426U (en) | 2013-12-04 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2013202896698U Expired - Fee Related CN203321426U (en) | 2013-05-24 | 2013-05-24 | Downward strike type stuck freeing packer |
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| Country | Link |
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| CN (1) | CN203321426U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103321605A (en) * | 2013-05-24 | 2013-09-25 | 中国石油化工股份有限公司 | Downward striking type unblocking packer |
| CN107829707A (en) * | 2017-11-21 | 2018-03-23 | 中国石油集团西部钻探工程有限公司 | Drilling liner cementing tail pipe plug assembly |
| CN109751011A (en) * | 2016-09-06 | 2019-05-14 | 中国石油化工股份有限公司 | A kind of hot-washing wax remover packer |
| CN114593899A (en) * | 2020-12-01 | 2022-06-07 | 中国石油天然气集团有限公司 | Slip heavy load test fixture |
-
2013
- 2013-05-24 CN CN2013202896698U patent/CN203321426U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103321605A (en) * | 2013-05-24 | 2013-09-25 | 中国石油化工股份有限公司 | Downward striking type unblocking packer |
| CN103321605B (en) * | 2013-05-24 | 2016-01-06 | 中国石油化工股份有限公司 | Under hit formula unfreezing packer |
| CN109751011A (en) * | 2016-09-06 | 2019-05-14 | 中国石油化工股份有限公司 | A kind of hot-washing wax remover packer |
| CN107829707A (en) * | 2017-11-21 | 2018-03-23 | 中国石油集团西部钻探工程有限公司 | Drilling liner cementing tail pipe plug assembly |
| CN114593899A (en) * | 2020-12-01 | 2022-06-07 | 中国石油天然气集团有限公司 | Slip heavy load test fixture |
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| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20131204 Termination date: 20160524 |
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| CF01 | Termination of patent right due to non-payment of annual fee |