CN203685112U - Large-area pressure-loaded packer - Google Patents
Large-area pressure-loaded packer Download PDFInfo
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- CN203685112U CN203685112U CN201320806443.0U CN201320806443U CN203685112U CN 203685112 U CN203685112 U CN 203685112U CN 201320806443 U CN201320806443 U CN 201320806443U CN 203685112 U CN203685112 U CN 203685112U
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Abstract
The utility model relates to the technical field of packer devices in the well-completion practice of oil-gas fields and provides a large-area pressure-loaded packer. The large-area pressure-loaded packer comprises an upper connector, a shaft sleeve body, a shearing pin, a cylinder sleeve, a retaining ring, a rubber tube packer device and a lower connector, wherein the inner side of the lower part of the upper connector is fixedly mounted with the outer side of the upper part of the shaft sleeve body through threaded connection; the outer side of the lower part of the shaft sleeve body is fixedly mounted with the inner side of the upper part of the lower connector through threaded connection; the outer side of the upper part of the upper connector is provided with an outer ring table; the cylinder sleeve and the rubber tube packer device arranged in the outer side of the shaft sleeve body in a sleeving manner and capable of squeezing the rubber tube packer device and allowing the rubber tube packer device to be bulgy are sequentially arranged between positions below the outer ring table and above the lower connector from top to bottom. The packer provided by the utility model is reasonable and compact in structure; through the reasonable structural arrangement, the pressure bearing area of an inner ring table is greater than that of conventional packers, so that when the high-pressure fluid reaches the rated pressure, the shearing pin can be sheared; the stability of the packer function is strengthened and subsequent operations and the successful completion of the well-completion practice are facilitated.
Description
Technical field
the utility model relates to packing device technical field in oil gas field completion practice, is a kind of large area pressure-bearing type packer.
Background technology
completion practice is the important technical that is connected drilling well and oil producing operation, and meanwhile, completion is again the great underground work of risk, and therefore, the success or not of completion practice, will directly cause the success or failure of a bite well.Particularly current, along with deepening continuously of shale gas, the unconventional exploration of oil and gas field of fine and close wet goods, people for the research of carrying out such Reservoir Development also in continuous reinforcement.For the exploitation of such oil-gas reservoir, carry out the pressure break completion technological means that is also absolutely necessary.No matter be the completion of conventional gas and oil Tibetan or the completion practice of unconventional oil/gas well, an indispensable technological means is exactly to utilize packer to carry out the isolation operation of shaft bottom reservoir.In conventional gas and oil is hidden, utilize packer to carry out the sealing between annular space sealing, bore hole reservoir and the tubing string in sleeve pipe; In unconventional oil-gas reservoir completion practice, also need to utilize packer to carry out the isolation between the interior annular space sealing of sleeve pipe and different reservoir, therefore, packer is requisite technological means in completion practice, the importance of packer has some idea of.At present, the packer that Oil Field uses, is mostly common fluid cylinder and sets, because the bearing area of its fluid cylinder inside is little, cause often occurring suppressing overrate and but still cannot cut off the phenomenon of pin, thereby affect subsequent operation, cannot complete set completion practice.
Summary of the invention
the utility model provides a kind of large area pressure-bearing type packer, overcome the deficiency of above-mentioned prior art, its inner bearing area of fluid cylinder that can effectively solve existing packer existence is little, be prone to the phenomenon of suppressing overrate and but still cannot cutting off pin, thereby affect subsequent operation, cannot complete the problem of set completion practice.
the technical solution of the utility model realizes by following measures: a kind of large area pressure-bearing type packer, comprise top connection, axle sleeve body, shear pin, cylinder sleeve, retaining ring, packing element packing device and lower contact, the lower outside of the upper outside of the lower inside of top connection and axle sleeve body and axle sleeve body and the upper inner of lower contact are all threaded connection and are fixedly installed togather, the upper outside of top connection has outer shroud platform, below outer shroud platform and between above lower contact, be provided with successively cylinder sleeve and the packing element packing device that can push packing element packing device and make its expansion that are sleeved on axle sleeve body outside from top to bottom, the upper inner of cylinder sleeve is sleeved on the lower outside of top connection and is fixedly installed togather by shear pin, the cylinder sleeve inner side of corresponding top connection lower position is fixed with interior ring platform, between corresponding top connection lower end and interior ring platform, on the axle sleeve body of position, circumferentially there is at least one through hole that builds the pressure, between interior ring platform and axle sleeve body, be provided with the retaining ring that can prevent that interior ring platform from moving up, internal thread or external screw thread are arranged respectively at the top of top connection and the bottom of lower contact.
the further optimization and/or improvements to above-mentioned utility model technical scheme below:
the inner side of the outside of above-mentioned retaining ring and interior ring platform can be fixedly installed togather by screw thread, and the inner side of retaining ring is distributed with retaining pawl, and the axle sleeve body outside of corresponding retaining pawl travel position is distributed with the axle sleeve pawl matching with retaining pawl; The interior ring platform inner side of corresponding axle sleeve pawl lower position is fixed with the joint ring platform that is sleeved on axle sleeve body outside, the axle sleeve body outside of corresponding joint ring platform lower position is fixed with axle sleeve ring platform, and between corresponding joint ring platform and axle sleeve ring platform, the cylinder sleeve sidewall of position is provided with discharge opeing through hole.
the top connection inner side of above-mentioned corresponding axle sleeve body top position can be fixed with upper limit erection loop platform, and the lower end seat of upper limit erection loop platform is on axle sleeve body; The lower contact inner side of corresponding axle sleeve body lower position is fixed with lower limit erection loop platform, and the lower end seat of axle sleeve body is on lower limit erection loop platform; The lower contact upper inner limited location of respective shaft collar platform lower position is installed annular groove, and the lower end seat of axle sleeve ring platform is in limit mounting annular groove bottom.
above-mentioned packing element packing device can comprise upper limit parts, lower limit parts, cartridge, packing element support ring and sealing ring; Between corresponding cylinder sleeve below and lower contact top, the axle sleeve body outside of position is set with upper limit parts, cartridge and lower limit parts from top to bottom successively; The lower outside of cylinder sleeve has up big and down small upper extruding inversed taper platform, and the upper inner of upper limit parts has the up big and down small upper pressure-bearing reverse taper holes matching with upper extruding inversed taper platform, and upper extruding back taper pedestal is in upper pressure-bearing reverse taper holes; The upper outside of lower contact has up-small and down-big lower extruding frustum, and the lower inside of lower limit parts has the up-small and down-big lower pressure-bearing taper hole matching with lower extruding frustum, and lower pressure-bearing taper hole is positioned at the outside of lower extruding frustum; Inner side, cartridge middle part is provided with the packing element support ring that is sleeved on axle sleeve body outside, between the middle part of packing element support ring and axle sleeve body outside, is provided with sealing ring.
the top and bottom of above-mentioned cartridge can be fixed be respectively sleeved on axle sleeve body outside and external diameter be less than cartridge external diameter upper packing element snap ring and lower rubber cylinder snap ring; Upper limit parts comprise upper outer shroud and the upper inner ring that is sleeved on successively axle sleeve body outside from top to bottom and the upper baffle ring that is sleeved on packing element snap ring outside, the upper inner of upper outer shroud has upper pressure-bearing reverse taper holes, the outside, lower end of upper outer shroud is fixed with upper limit ring platform, be fixed with the upper limit Ka Tai between axle sleeve body and upper limit ring platform in the upper end of upper inner ring, the lower inside of upper inner ring and the upper outside of upper baffle ring are all taper type up-small and down-big and that match; Lower limit parts comprise lower baffle ring and the lower inner ring that is sleeved on successively axle sleeve body outside from top to bottom and the lower outer shroud that is sleeved on lower rubber cylinder snap ring outside, the lower inside of lower outer shroud has lower pressure-bearing taper hole, the outside, upper end of lower outer shroud is fixed with lower limit ring platform, be fixed with the lower limit Ka Tai between axle sleeve body and lower limit ring platform in the lower end of lower inner ring, the upper inner of lower inner ring and the lower outside of lower baffle ring be the big up and small down and inversed taper platform shape of matching all.
between the upper outside of above-mentioned axle sleeve body and the inner side of top connection, between the lower outside of top connection and the inner side of cylinder sleeve, between joint ring platform and axle sleeve body outside and all can be provided with sealing ring between the lower outside of axle sleeve body and the inner side of lower contact.
the utility model reasonable and compact in structure, easy to use, it is arranged by rational structure, make the bearing area of interior ring platform be greater than conventional packer, thereby guarantee that shear pin can cut off in the time that high-pressure fluid reaches rated pressure, strengthen the stability of its packing effect, be convenient to completing smoothly of subsequent operation and completion practice; Effect by retaining ring can effectively prevent the up of cylinder sleeve, thereby guarantees the lasting setting of cartridge; By setting up discharge opeing through hole, can be convenient to the pressure between releasing sealed ring platform and axle sleeve ring platform, guarantee that cylinder sleeve can be descending smoothly.
Accompanying drawing explanation
the master that accompanying drawing 1 is the utility model most preferred embodiment looks half section structural representation.
coding in accompanying drawing is respectively: 1 is top connection, 2 is axle sleeve body, 3 is shear pin, 4 is cylinder sleeve, 5 is retaining ring, 6 is lower contact, 7 is outer shroud platform, 8 is interior ring platform, 9 is the through hole that builds the pressure, 10 is joint ring platform, 11 is axle sleeve ring platform, 12 is discharge opeing through hole, 13 is upper limit erection loop platform, 14 is cartridge, 15 is packing element support ring, 16 is sealing ring, 17 is upper extruding inversed taper platform, 18 is lower limit erection loop platform, 19 is upper packing element snap ring, 20 is lower extruding frustum, 21 is lower limit Ka Tai, 22 is lower rubber cylinder snap ring, 23 is upper outer shroud, 24 is upper inner ring, 25 is upper baffle ring, 26 is upper limit ring platform, 27 is upper limit Ka Tai, 28 is lower baffle ring, 29 is lower inner ring, 30 is lower outer shroud, 31 is lower limit ring platform.
The specific embodiment
the utility model is not subject to the restriction of following embodiment, can determine concrete embodiment according to the technical solution of the utility model and actual conditions.
in the utility model, for convenience of description, the description of the relative position relation of each parts is to be all described according to the Butut mode of Figure of description 1, as: the position relationship of forward and backward, upper and lower, left and right etc. is to determine according to the Butut direction of Figure of description.
below in conjunction with embodiment and accompanying drawing, the utility model is further described:
as shown in Figure 1, this large area pressure-bearing type packer comprises top connection 1, axle sleeve body 2, shear pin 3, cylinder sleeve 4, retaining ring 5, packing element packing device and lower contact 6, the upper inner of the lower outside of the upper outside of the lower inside of top connection 1 and axle sleeve body 2 and axle sleeve body 2 and lower contact 6 is all threaded connection and is fixedly installed togather, the upper outside of top connection 1 has outer shroud platform 7, below outer shroud platform 7 and between above lower contact 6, be provided with successively cylinder sleeve 4 and the packing element packing device that can push packing element packing device and make its expansion that are sleeved on axle sleeve body 2 outsides from top to bottom, the upper inner of cylinder sleeve 4 is sleeved on the lower outside of top connection 1 and is fixedly installed togather by shear pin 3, cylinder sleeve 4 inner sides of corresponding top connection 1 lower position are fixed with interior ring platform 8, between corresponding top connection 1 lower end and interior ring platform 8, on the axle sleeve body 2 of position, circumferentially there is at least one through hole 9 that builds the pressure, between interior ring platform 8 and axle sleeve body 2, be provided with the retaining ring 5 that can prevent that interior ring platform 8 from moving up, internal thread or external screw thread are arranged respectively at the bottom of the top of top connection 1 and lower contact 6.In use, high-pressure fluid injects from the inside of top connection 1, entering behind axle sleeve body 2 inside and will flow in the cavity between top connection 1 and interior ring platform 8 by the through hole 9 that builds the pressure, thereby acts on the upper surface of interior ring platform 8; In the time that pressure increases to the shear strength of shear pin 3, will cut off shear pin 3, now, cylinder sleeve 4 is descending by internally encircling at high-pressure fluid under the effect of platform 8, thus extruding packing element packing device is realized packing effect; Realizing after packing, retaining ring 5 is can spacing cylinder sleeve 4 up, thereby guarantees to continue setting.In this process, because its structure is arranged, can make the bearing area of interior ring platform 8 be greater than conventional packer, thereby guarantee that shear pin 3 can cut off in the time that high-pressure fluid reaches rated pressure, strengthen the stability of its packing effect, be convenient to completing smoothly of subsequent operation and completion practice.
can according to actual needs, above-mentioned large area pressure-bearing type packer be made further optimization and/or improvements:
as shown in Figure 1, the inner side of the outside of retaining ring 5 and interior ring platform 8 is fixedly installed togather by screw thread, the inner side of retaining ring 5 is distributed with retaining pawl, and axle sleeve body 2 outsides of corresponding retaining pawl travel position are distributed with the axle sleeve pawl matching with retaining pawl; Interior ring platform 8 inner sides of corresponding axle sleeve pawl lower position are fixed with the joint ring platform 10 that is sleeved on axle sleeve body 2 outsides, axle sleeve body 2 outsides of corresponding joint ring platform 10 lower positions are fixed with axle sleeve ring platform 11, and between corresponding joint ring platform 10 and axle sleeve ring platform 11, cylinder sleeve 4 sidewalls of position are provided with discharge opeing through hole 12.Can effectively prevent the up of cylinder sleeve 4 by cooperatively interacting of retaining pawl and axle sleeve pawl, thereby guarantee the lasting setting of packing element packing device; By setting up discharge opeing through hole 12, can be convenient to the pressure between releasing sealed ring platform 10 and axle sleeve ring platform 11, guarantee that cylinder sleeve 4 can be descending smoothly.
as shown in Figure 1, top connection 1 inner side of corresponding axle sleeve body 2 top positions is fixed with upper limit erection loop platform 13, and the lower end seat of upper limit erection loop platform 13 is on axle sleeve body 2; Lower contact 6 inner sides of corresponding axle sleeve body 2 lower positions are fixed with lower limit erection loop platform 18, and the lower end seat of axle sleeve body 2 is on lower limit erection loop platform 18; The lower contact 6 upper inner limited locations of respective shaft collar platform 11 lower positions are installed annular groove, and the lower end seat of axle sleeve ring platform 11 is in limit mounting annular groove bottom.Can be convenient to like this its mounting limit each other.
as shown in Figure 1, packing element packing device comprises upper limit parts, lower limit parts, cartridge 14, packing element support ring 15 and sealing ring 16; Between corresponding cylinder sleeve 4 belows and lower contact 6 tops, axle sleeve body 2 outsides of position are set with upper limit parts, cartridge 14 and lower limit parts from top to bottom successively; The lower outside of cylinder sleeve 4 has up big and down small upper extruding inversed taper platform 17, and the upper inner of upper limit parts has the up big and down small upper pressure-bearing reverse taper holes matching with upper extruding inversed taper platform 17, and 17 of upper extruding inversed taper platforms are in upper pressure-bearing reverse taper holes; The upper outside of lower contact 6 has up-small and down-big lower extruding frustum 20, and the lower inside of lower limit parts has the up-small and down-big lower pressure-bearing taper hole matching with lower extruding frustum 20, and lower pressure-bearing taper hole is positioned at the outside of lower extruding frustum 20; Cartridge 14 inner sides, middle part are provided with the packing element support ring 15 that is sleeved on axle sleeve body 2 outsides, between the middle part of packing element support ring 15 and axle sleeve body 2 outsides, are provided with sealing ring 16.The upper extruding inversed taper platform 17 that employing cooperatively interacts and upper pressure-bearing reverse taper holes and lower extruding frustum 20 and lower pressure-bearing taper hole, can improve the descending stability that cartridge 14 is exerted pressure of cylinder sleeve 4, guarantees the smooth packing of cartridge 14.According to demand, cartridge 14 and packing element support ring 15 can be sulfided into one, can be convenient to like this install, and have good sealing effectiveness.
as shown in Figure 1, the top and bottom of cartridge 14 be fixed be respectively sleeved on axle sleeve body outside and external diameter be less than cartridge 14 external diameters upper packing element snap ring 19 and lower rubber cylinder snap ring 22; Upper limit parts comprise upper outer shroud 23 and the upper inner ring 24 that is sleeved on successively axle sleeve body 2 outsides from top to bottom and the upper baffle ring 25 that is sleeved on packing element snap ring 19 outsides, the upper inner of upper outer shroud 23 has upper pressure-bearing reverse taper holes, the outside, lower end of upper outer shroud 23 is fixed with upper limit ring platform 26, be fixed with the upper limit card platform 27 between axle sleeve body 2 and upper limit ring platform 26 in the upper end of upper inner ring 24, the upper outside of the lower inside of upper inner ring 24 and upper baffle ring 25 is all taper type up-small and down-big and that match; Lower limit parts comprise lower baffle ring 28 and the lower inner ring 29 that is sleeved on successively axle sleeve body 2 outsides from top to bottom and the lower outer shroud 30 that is sleeved on lower rubber cylinder snap ring 22 outsides, the lower inside of lower outer shroud 30 has lower pressure-bearing taper hole, the outside, upper end of lower outer shroud 30 is fixed with lower limit ring platform 31, be fixed with the lower limit card platform 21 between axle sleeve body 2 and lower limit ring platform 31 in the lower end of lower inner ring 29, the lower outside of the upper inner of lower inner ring 29 and lower baffle ring 28 is the big up and small down and inversed taper platform shape of matching all.Can form spacing to cartridge 14 by the interaction of baffle ring and packing element snap ring, be convenient to the crimp of cartridge 14, also can further improve the descending stability that cartridge 14 is exerted pressure of cylinder sleeve 4, make cartridge 14 there is good packing effect.
as shown in Figure 1, between the upper outside of axle sleeve body 2 and the inner side of top connection 1, between the lower outside of top connection 1 and the inner side of cylinder sleeve 4, between joint ring platform 10 and axle sleeve body 2 outsides and be equipped with sealing ring 16 between the lower outside of axle sleeve body 2 and the inner side of lower contact 6.
above technical characterictic has formed most preferred embodiment of the present utility model, and it has stronger compliance and best implementation result, can increase and decrease according to actual needs non-essential technical characterictic, meets the demand of different situations.
Claims (8)
1. a large area pressure-bearing type packer, it is characterized in that comprising top connection, axle sleeve body, shear pin, cylinder sleeve, retaining ring, packing element packing device and lower contact, the lower outside of the upper outside of the lower inside of top connection and axle sleeve body and axle sleeve body and the upper inner of lower contact are all threaded connection and are fixedly installed togather, the upper outside of top connection has outer shroud platform, below outer shroud platform and between above lower contact, be provided with successively cylinder sleeve and the packing element packing device that can push packing element packing device and make its expansion that are sleeved on axle sleeve body outside from top to bottom, the upper inner of cylinder sleeve is sleeved on the lower outside of top connection and is fixedly installed togather by shear pin, the cylinder sleeve inner side of corresponding top connection lower position is fixed with interior ring platform, between corresponding top connection lower end and interior ring platform, on the axle sleeve body of position, circumferentially there is at least one through hole that builds the pressure, between interior ring platform and axle sleeve body, be provided with the retaining ring that can prevent that interior ring platform from moving up, internal thread or external screw thread are arranged respectively at the top of top connection and the bottom of lower contact.
2. large area pressure-bearing type packer according to claim 1, it is characterized in that the outside of retaining ring and the inner side of interior ring platform are fixedly installed togather by screw thread, the inner side of retaining ring is distributed with retaining pawl, and the axle sleeve body outside of corresponding retaining pawl travel position is distributed with the axle sleeve pawl matching with retaining pawl; The interior ring platform inner side of corresponding axle sleeve pawl lower position is fixed with the joint ring platform that is sleeved on axle sleeve body outside, the axle sleeve body outside of corresponding joint ring platform lower position is fixed with axle sleeve ring platform, and between corresponding joint ring platform and axle sleeve ring platform, the cylinder sleeve sidewall of position is provided with discharge opeing through hole.
3. large area pressure-bearing type packer according to claim 2, is characterized in that the top connection inner side of corresponding axle sleeve body top position is fixed with upper limit erection loop platform, and the lower end seat of upper limit erection loop platform is on axle sleeve body; The lower contact inner side of corresponding axle sleeve body lower position is fixed with lower limit erection loop platform, and the lower end seat of axle sleeve body is on lower limit erection loop platform; The lower contact upper inner limited location of respective shaft collar platform lower position is installed annular groove, and the lower end seat of axle sleeve ring platform is in limit mounting annular groove bottom.
4. according to the large area pressure-bearing type packer described in claim 1 or 2 or 3, it is characterized in that packing element packing device comprises upper limit parts, lower limit parts, cartridge, packing element support ring and sealing ring; Between corresponding cylinder sleeve below and lower contact top, the axle sleeve body outside of position is set with upper limit parts, cartridge and lower limit parts from top to bottom successively; The lower outside of cylinder sleeve has up big and down small upper extruding inversed taper platform, and the upper inner of upper limit parts has the up big and down small upper pressure-bearing reverse taper holes matching with upper extruding inversed taper platform, and upper extruding back taper pedestal is in upper pressure-bearing reverse taper holes; The upper outside of lower contact has up-small and down-big lower extruding frustum, and the lower inside of lower limit parts has the up-small and down-big lower pressure-bearing taper hole matching with lower extruding frustum, and lower pressure-bearing taper hole is positioned at the outside of lower extruding frustum; Inner side, cartridge middle part is provided with the packing element support ring that is sleeved on axle sleeve body outside, between the middle part of packing element support ring and axle sleeve body outside, is provided with sealing ring.
5. large area pressure-bearing type packer according to claim 4, the top and bottom that it is characterized in that cartridge be fixed be respectively sleeved on axle sleeve body outside and external diameter be less than cartridge external diameter upper packing element snap ring and lower rubber cylinder snap ring; Upper limit parts comprise upper outer shroud and the upper inner ring that is sleeved on successively axle sleeve body outside from top to bottom and the upper baffle ring that is sleeved on packing element snap ring outside, the upper inner of upper outer shroud has upper pressure-bearing reverse taper holes, the outside, lower end of upper outer shroud is fixed with upper limit ring platform, be fixed with the upper limit Ka Tai between axle sleeve body and upper limit ring platform in the upper end of upper inner ring, the lower inside of upper inner ring and the upper outside of upper baffle ring are all taper type up-small and down-big and that match; Lower limit parts comprise lower baffle ring and the lower inner ring that is sleeved on successively axle sleeve body outside from top to bottom and the lower outer shroud that is sleeved on lower rubber cylinder snap ring outside, the lower inside of lower outer shroud has lower pressure-bearing taper hole, the outside, upper end of lower outer shroud is fixed with lower limit ring platform, be fixed with the lower limit Ka Tai between axle sleeve body and lower limit ring platform in the lower end of lower inner ring, the upper inner of lower inner ring and the lower outside of lower baffle ring be the big up and small down and inversed taper platform shape of matching all.
6. according to the large area pressure-bearing type packer described in claim 2 or 3, it is characterized in that between the upper outside of axle sleeve body and the inner side of top connection, between the lower outside of top connection and the inner side of cylinder sleeve, between joint ring platform and axle sleeve body outside and be equipped with sealing ring between the lower outside of axle sleeve body and the inner side of lower contact.
7. large area pressure-bearing type packer according to claim 4, is characterized in that between the upper outside of axle sleeve body and the inner side of top connection, between the lower outside of top connection and the inner side of cylinder sleeve, between joint ring platform and axle sleeve body outside and be equipped with sealing ring between the lower outside of axle sleeve body and the inner side of lower contact.
8. large area pressure-bearing type packer according to claim 5, is characterized in that between the upper outside of axle sleeve body and the inner side of top connection, between the lower outside of top connection and the inner side of cylinder sleeve, between joint ring platform and axle sleeve body outside and be equipped with sealing ring between the lower outside of axle sleeve body and the inner side of lower contact.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320806443.0U CN203685112U (en) | 2013-12-10 | 2013-12-10 | Large-area pressure-loaded packer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320806443.0U CN203685112U (en) | 2013-12-10 | 2013-12-10 | Large-area pressure-loaded packer |
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| Publication Number | Publication Date |
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| CN203685112U true CN203685112U (en) | 2014-07-02 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320806443.0U Expired - Fee Related CN203685112U (en) | 2013-12-10 | 2013-12-10 | Large-area pressure-loaded packer |
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| Country | Link |
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| CN (1) | CN203685112U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109372464A (en) * | 2018-12-19 | 2019-02-22 | 中国石油大学(北京) | Packer |
-
2013
- 2013-12-10 CN CN201320806443.0U patent/CN203685112U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109372464A (en) * | 2018-12-19 | 2019-02-22 | 中国石油大学(北京) | Packer |
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|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140702 Termination date: 20201210 |