CN103470210A - Fixture block type anti-setting packer - Google Patents
Fixture block type anti-setting packer Download PDFInfo
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- CN103470210A CN103470210A CN2013104240391A CN201310424039A CN103470210A CN 103470210 A CN103470210 A CN 103470210A CN 2013104240391 A CN2013104240391 A CN 2013104240391A CN 201310424039 A CN201310424039 A CN 201310424039A CN 103470210 A CN103470210 A CN 103470210A
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Abstract
The invention relates to the technical field of packers used in oil and gas field well cementing and completion operation, in particular to a fixture block type anti-setting packer. The fixture block type anti-setting packer comprises a central barrel, an upper retaining sleeve, a rubber barrel packing device, a positioning sleeve, a positioning block, a rubber barrel shear pin and a hydraulic driving device, wherein the upper retaining sleeve is fixedly arranged on the outer side of the upper part of the central barrel; the positioning sleeve is fixedly arranged on the outer side of the middle part of the central barrel through the rubber barrel shear pin; the rubber barrel packing device which radially expands under stress to pack a wellbore is sleeved outside the central barrel between the upper retaining sleeve and the positioning sleeve. The fixture block type anti-setting packer has a rational and compact structure and is convenient to use; by arranging the positioning block on the positioning sleeve and arranging an outer barrel outside a pressure keeping barrel, the limiting protection of the positioning sleeve and the pressure keeping barrel can be realized, the adaptability and the reliability under various well conditions are improved, and advanced setting is avoided; long and short rubber barrels of different hardness are additionally arranged and matched for use, and a supporting ring and a supporting ring seal ring are additionally arranged in the long rubber barrel, so that the packing capacity of the packer can be improved and the problem of inter-zonal cross-flow is avoided.
Description
Technical field
the present invention relates to the packer technology field that the solid completion practice of oil gas field is used, is the anti-set packer of a kind of blocking piece type.
Background technology
in the work progresss such as oilfield well completion, well workover, stimulation work, often need to use packer to set the packing stratum on the borehole wall, to realize the purposes such as layer and section exploitation, control water blocking water, reservoir reconstruction.And often there is the problem of the following aspects in conventional packer: 1. complex structure, the various processing cost that causes of parts are high, and global reliability is low, especially for irregular borehole wall bad adaptability, when abnormal in well, easily causes setting in advance; 2. the packing scarce capacity, to the oil-bearing stratum flooding supercharging time, easily cause altering layer, thereby reduce the benefit of water filling.These problems will be brought inconvenience to execute-in-place, even have influence on carrying out smoothly of this well completion practice.
Summary of the invention
the invention provides the anti-set packer of a kind of blocking piece type, overcome the deficiency of above-mentioned prior art, it can effectively solve existing packer poor reliability, easily shift to an earlier date setting problem.
technical scheme of the present invention realizes by following measures: a kind of blocking piece type is prevented set packer, comprise central tube, upper interstage sleeve, packing element packing device, positioning sleeve, locating piece, packing element shear pin and fluid pressure drive device, the upper outside of central tube is installed with interstage sleeve; The outside, middle part of central tube is fixed with positioning sleeve by the packing element shear pin; Central tube between upper interstage sleeve and the positioning sleeve outside be set with can be after pressurized expanded radially make the packing element packing device of well packing; Thereby the lower outside of central tube is fixed with the fluid pressure drive device that can promote positioning sleeve up extruding packing element packing device and can push and unclamp locating piece; The lower circumference of positioning sleeve is distributed with the positioning through hole that is no less than, on the central tube of corresponding positioning through hole position, is provided with locating slot, and locating piece is positioned at locating slot through positioning through hole the extruding by fluid pressure drive device; The top and bottom of central tube are respectively arranged with internal thread or external screw thread.
below the further optimization and/or improvements to the foregoing invention technical scheme:
above-mentioned fluid pressure drive device can comprise build the pressure cylinder and urceolus, build the pressure the cylinder upper inner be provided with interior ring platform, the cylinder that builds the pressure is fixed on the lower outside of central tube by the cylindrical shell shear pin that is positioned at the Huan Tai position, an inboard, upper end that builds the pressure of corresponding positioning through hole position is provided with the positioning boss that is pressed on locating piece and is positioned at ring platform top, build the pressure the cylinder the outside be set with urceolus, bottom and the central tube of urceolus are fixed together; There is the first boss that is positioned at the cylinder top that builds the pressure in the outside, positioning sleeve middle part of corresponding positioning through hole top position, and the packing element shear pin is positioned at the middle part of the first boss, and the top of urceolus is sleeved on the first boss outside; The positioning sleeve upper outside of corresponding the first boss top position has diameter to be greater than the second boss of the first boss diameter, and the bottom surface seat of the second boss is in the urceolus top; Be positioned on the central tube of cylindrical shell shear pin below and the cylinder that builds the pressure and be respectively arranged with the central tube inlet opening that can interconnect and an inlet opening that builds the pressure; The lower inside of urceolus has a joint ring platform that is positioned at the cylinder below of building the pressure, between build the pressure the cylinder outside and the urceolus inboard between the interior ring platform and central tube above the central tube inlet opening, above an inlet opening that building the pressure, the joint ring platform is inboard and central tube outside between be provided with sealing ring.
the above-mentioned lower outside that builds the pressure cylinder can be provided with the groove that is positioned at cylindrical shell shear pin below.
can there be fixed cover in the above-mentioned central tube outside that is positioned at the cylinder below that builds the pressure, the lower outside of urceolus and the upper inner of fixed cover are threaded connection and are fixed together, the lower inside of fixed cover is provided with the inner convex platform that is sleeved on the central tube outside, is provided with inboard between the bottom of urceolus and the top of inner convex platform and is fixed on the spacing ring on the central tube lateral wall.
can be provided with lock ring between the lower inside of the above-mentioned cylinder that builds the pressure and the central tube outside, build the pressure outside lower inside and the lock ring of cylinder to be threaded connection and be fixed together, axially open is arranged on lock ring, be provided with at least one inside in axially open and be fixed on the anti-rotation nail on central tube, be distributed with the retaining pawl on the inwall of lock ring, the central tube arranged outside of the journey of dividing a word with a hyphen at the end of a line on corresponding lock ring position has the cylindrical shell pawl matched with the retaining pawl.
above-mentioned packing element packing device can comprise that short rubber cylinder, quantity are no less than long packing element type and the lower short rubber cylinder of one; Upper short rubber cylinder, long packing element type and lower short rubber cylinder are sleeved on the central tube outside from top to bottom successively, and the inwall middle part of long packing element type is fixed with support ring, and the pushing out ring seal groove is arranged on the inwall of support ring, and the pushing out ring sealing ring is installed in the pushing out ring seal groove.
the quantity of above-mentioned long packing element type can be two.
the above-mentioned top at upper short rubber cylinder, between short rubber cylinder and long packing element type, between adjacent long packing element type, between long packing element type and lower short rubber cylinder, the bottom of lower short rubber cylinder all can be provided with the baffle ring that is sleeved on the central tube outside.
the outside, lower end of above-mentioned upper interstage sleeve can be fixed with outer lug boss, the outside, upper end of positioning sleeve is fixed with lower outer lug boss, in the upper mounting groove of the baffle ring top at upper short rubber cylinder top between upper outside boss and central tube, in the lower mounting groove of baffle ring bottom between lower outer lug boss and central tube of lower short rubber cylinder bottom.
reasonable and compact in structure of the present invention; easy to use; it is by locating piece is set on positioning sleeve, and urceolus is set the cylinder that builds the pressure is outer, can realize positioning sleeve and the position limitation protection that builds the pressure tin; improve its compliance to various hole conditions and reliability; avoid it setting in advance, increase the long and short packing element that hardness is different and be used in conjunction with, and increase support ring and pushing out ring sealing ring in long packing element type; can improve its packing ability, avoid altering a layer problem.
The accompanying drawing explanation
accompanying drawing 1 is looked the half section structural representation for the master of most preferred embodiment of the present invention.
accompanying drawing 2 is the local structure for amplifying schematic diagram of accompanying drawing 1 at the D place.
accompanying drawing 3 is analysed and observe the structure for amplifying schematic diagram for accompanying drawing 1 at the A-A place.
accompanying drawing 4 is analysed and observe the structure for amplifying schematic diagram for accompanying drawing 1 at the B-B place.
coding in accompanying drawing is respectively: cylinder centered by 1, 2 is upper interstage sleeve, 3 is positioning sleeve, 4 is locating piece, 5 is the packing element shear pin, 6 is positioning through hole, 7 is locating slot, 8 is the cylinder that builds the pressure, 9 is urceolus, 10 is the cylindrical shell shear pin, 11 is positioning boss, cylinder inlet opening centered by 12, 13 is an inlet opening that builds the pressure, 14 is sealing ring, 15 is interior ring platform, 16 is fixed cover, 17 is inner convex platform, 18 is spacing ring, 19 is lock ring, 20 is axially open, 21 is the anti-rotation nail, 22 is upper short rubber cylinder, 23 is long packing element type, 24 is lower short rubber cylinder, 25 is support ring, 26 is the pushing out ring sealing ring, 27 is baffle ring, 28 is upper outer lug boss, 29 is lower outer lug boss, 30 is groove.
The specific embodiment
the present invention is not subject to the restriction of following embodiment, can determine concrete embodiment according to technical scheme of the present invention and actual conditions.
in the present invention, for convenience of description, the description of the relative position relation of each parts is all to be 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 1.
below in conjunction with embodiment and accompanying drawing, the invention will be further described:
as shown in accompanying drawing 1,2,3,4, the anti-set packer of this blocking piece type comprises central tube 1, upper interstage sleeve 2, packing element packing device, positioning sleeve 3, locating piece 4, packing element shear pin 5 and fluid pressure drive device, and the upper outside of central tube 1 is installed with interstage sleeve 2; The outside, middle part of central tube 1 is fixed with positioning sleeve 3 by packing element shear pin 5; Central tube 1 outside between upper interstage sleeve 2 and positioning sleeve 3 be set with can be after pressurized expanded radially make the packing element packing device of well packing; Thereby the lower outside of central tube 1 is fixed with the fluid pressure drive device that can promote positioning sleeve 3 up extruding packing element packing device and can push and unclamp locating piece 4; The lower circumference of positioning sleeve 3 is distributed with the positioning through hole 6 that is no less than, on the central tube 1 of corresponding positioning through hole 6 positions, is provided with locating slot 7, and locating piece 4 is positioned at locating slot 7 through positioning through hole 6 extruding by fluid pressure drive device; The top and bottom of central tube 1 are respectively arranged with internal thread or external screw thread.In use, by the building the pressure of fluid pressure drive device, thereby promote the up extruding of positioning sleeve 3 packing element packing device, thus expanded radially packing well after packing element packing device pressurized.In this process, by the position-limiting action of 4 pairs of positioning sleeves 3 of locating piece, can avoid it setting in advance because of external force in the process of G.I.H, thereby improve its setting reliability, by the operation that builds the pressure, make on Pressure Actuated Device to move and push the plug packing device and make the well packing, convenient and swift.
can according to actual needs, the anti-set packer of above-mentioned blocking piece type be made further optimization and/or improvements:
as shown in accompanying drawing 1,2,3,4, fluid pressure drive device comprises build the pressure cylinder 8 and urceolus 9, cylinder 8 the upper inner that builds the pressure is provided with interior ring platform 15, the cylinder 8 that builds the pressure is fixed on the lower outside of central tube 1 by the cylindrical shell shear pin 10 that is positioned at ring platform 15 positions, cylinder 8 inboards, upper end that build the pressure of corresponding positioning through hole 6 positions are provided with the positioning boss 11 that is pressed on locating piece 4 and is positioned at ring platform 15 tops, cylinder 8 the outside that builds the pressure is set with urceolus 9, and the bottom of urceolus 9 and central tube 1 are fixed together; There is the first boss that is positioned at cylinder 8 tops that build the pressure in positioning sleeve 3 outsides, middle part of corresponding positioning through hole 6 top positions, and packing element shear pin 5 is positioned at the middle part of the first boss, and the top of urceolus 9 is sleeved on the first boss outside; Positioning sleeve 3 upper outside of corresponding the first boss top position have diameter to be greater than the second boss of the first boss diameter, and the bottom surface seat of the second boss is in urceolus 9 tops; Be positioned on the central tube 1 of cylindrical shell shear pin 10 belows and the cylinder 8 that builds the pressure and be respectively arranged with the central tube inlet opening 12 that can interconnect and the inlet opening 13 that builds the pressure; The lower inside of urceolus 9 has the joint ring platform that is positioned at cylinder 8 belows that build the pressure, building the pressure between cylinder 8 outsides and urceolus 9 inboards, be provided with sealing ring 14 between joint ring platform inboard and central tube 1 outside between the interior ring platform 15 and central tube 1 above central tube inlet opening 12, above the inlet opening 13 that building the pressure.Urceolus 9 is set, can realizes cylinder 8 the protection that builds the pressure, avoid building the pressure cylinder 8 in the process of G.I.H because external force moves, thereby guarantee its positioning action to locating hole.The gap surrounded between sealing ring 14 and urceolus 9 inboards and central tube 1 outside will form hydraulic cavities, in use, high-pressure fluid enters in hydraulic cavities by central tube inlet opening 12 and the inlet opening 13 that builds the pressure successively, after liquid in hydraulic cavities reaches certain pressure, the cylinder 8 that builds the pressure will be subject to thrust upwards, thereby cutting off cylindrical shell shear pin 10 starts up, when positioning boss 11 moves to locating piece 4 top, locating piece 4 is because its extruding force be subject to disappears and will become flexible, cause positioning sleeve 3 can cut off packing element shear pin 5 when being subject to building the pressure the thrust of cylinder 8, and up under the effect of the cylinder 8 that builds the pressure, thereby extruding packing element packing device.
as shown in Figure 1, cylinder 8 the lower outside that builds the pressure is provided with the groove 30 that is positioned at cylindrical shell shear pin 10 belows.Groove 30 can make to build the pressure cylinder 8 outsides at this position formation step, can be convenient to thus high-pressure fluid by central tube inlet opening 12 and rear the exerting pressure to cylindrical shell shear pin 10 of an inlet opening 13 that build the pressure.
as shown in Figure 1, there is fixed cover 16 in central tube 1 outside that is positioned at cylinder 8 belows that build the pressure, the upper inner of the lower outside of urceolus 9 and fixed cover 16 is threaded connection and is fixed together, the lower inside of fixed cover 16 is provided with the inner convex platform 17 that is sleeved on central tube 1 outside, is provided with inboard between the top of the bottom of urceolus 9 and inner convex platform 17 and is fixed on the spacing ring 18 on central tube 1 lateral wall.
as shown in accompanying drawing 1,4, build the pressure and be provided with lock ring 19 between cylinder 8 lower inside and central tube 1 outside, build the pressure cylinder 8 lower inside and lock ring 19 outsides are threaded connection and are fixed together, axially open 20 is arranged on lock ring 19, be provided with at least one inside in axially open 20 and be fixed on the anti-rotation nail 21 on central tube 1, be distributed with the retaining pawl on the inwall of lock ring 19, central tube 1 arranged outside of the journey position of dividing a word with a hyphen at the end of a line on corresponding lock ring 19 has the cylindrical shell pawl matched with the retaining pawl.Being used in conjunction with of retaining pawl and cylindrical shell pawl, can guarantee that it can continue after pin is cut off packing setting, is not subject to the interference of other external force in well.
as shown in Figure 1, the packing element packing device comprises that short rubber cylinder 22, quantity are no less than long packing element type 23 and the lower short rubber cylinder 24 of one; Upper short rubber cylinder 22, long packing element type 23 and lower short rubber cylinder 24 are sleeved on central tube 1 outside from top to bottom successively, and the inwall middle part of long packing element type 23 is fixed with support ring 25, and the pushing out ring seal groove is arranged on the inwall of support ring 25, and pushing out ring sealing ring 26 is installed in the pushing out ring seal groove.Support ring 25 and pushing out ring sealing ring 26 can make the packing element packing device in the situation that meet the ability that high pressure packing is still guaranteed the low pressure packing; Being used in conjunction with of long and short packing element can solve its packing scarce capacity, easily alter the problems such as layer, makes it have good setting effect.According to demand, the hardness of upper short rubber cylinder 22 and lower short rubber cylinder 24 is all higher than long packing element type 23.
as shown in Figure 1, the quantity of long packing element type 23 is two.
as shown in accompanying drawing 1,2, the top of upper short rubber cylinder 22, between short rubber cylinder 22 and long packing element type 23, between adjacent long packing element type 23, between long packing element type 23 and lower short rubber cylinder 24, the bottom of lower short rubber cylinder 24 is provided with the baffle ring 27 that is sleeved on central tube 1 outside.Packing element is when being squeezed, and baffle ring 27 can avoid it wavy distortion to occur.
as shown in accompanying drawing 1,2, the outside, lower end of upper interstage sleeve 2 is fixed with outer lug boss 28, the outside, upper end of positioning sleeve 3 is fixed with lower outer lug boss 29, in the upper mounting groove of baffle ring 27 tops at upper short rubber cylinder 22 tops between upper outside boss 28 and central tube 1, in the lower mounting groove of baffle ring 27 bottoms of lower short rubber cylinder 24 bottoms between lower outer lug boss 29 and central tube 1.
above technical characterictic has formed most preferred embodiment of the present invention, 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 (9)
1. the anti-set packer of blocking piece type, is characterized in that comprising central tube, upper interstage sleeve, packing element packing device, positioning sleeve, locating piece, packing element shear pin and fluid pressure drive device, and the upper outside of central tube is installed with interstage sleeve; The outside, middle part of central tube is fixed with positioning sleeve by the packing element shear pin; Central tube between upper interstage sleeve and the positioning sleeve outside be set with can be after pressurized expanded radially make the packing element packing device of well packing; Thereby the lower outside of central tube is fixed with the fluid pressure drive device that can promote positioning sleeve up extruding packing element packing device and can push and unclamp locating piece; The lower circumference of positioning sleeve is distributed with the positioning through hole that is no less than, on the central tube of corresponding positioning through hole position, is provided with locating slot, and locating piece is positioned at locating slot through positioning through hole the extruding by fluid pressure drive device; The top and bottom of central tube are respectively arranged with internal thread or external screw thread.
2. blocking piece type according to claim 1 is prevented set packer, it is characterized in that fluid pressure drive device comprises build the pressure cylinder and urceolus, build the pressure the cylinder upper inner be provided with interior ring platform, the cylinder that builds the pressure is fixed on the lower outside of central tube by the cylindrical shell shear pin that is positioned at the Huan Tai position, an inboard, upper end that builds the pressure of corresponding positioning through hole position is provided with the positioning boss that is pressed on locating piece and is positioned at ring platform top, build the pressure the cylinder the outside be set with urceolus, bottom and the central tube of urceolus are fixed together; There is the first boss that is positioned at the cylinder top that builds the pressure in the outside, positioning sleeve middle part of corresponding positioning through hole top position, and the packing element shear pin is positioned at the middle part of the first boss, and the top of urceolus is sleeved on the first boss outside; The positioning sleeve upper outside of corresponding the first boss top position has diameter to be greater than the second boss of the first boss diameter, and the bottom surface seat of the second boss is in the urceolus top; Be positioned on the central tube of cylindrical shell shear pin below and the cylinder that builds the pressure and be respectively arranged with the central tube inlet opening that can interconnect and an inlet opening that builds the pressure; The lower inside of urceolus has a joint ring platform that is positioned at the cylinder below of building the pressure, between build the pressure the cylinder outside and the urceolus inboard between the interior ring platform and central tube above the central tube inlet opening, above an inlet opening that building the pressure, the joint ring platform is inboard and central tube outside between be provided with sealing ring.
3. the anti-set packer of blocking piece type according to claim 2, the lower outside of the cylinder that it is characterized in that building the pressure is provided with the groove that is positioned at cylindrical shell shear pin below.
4. according to the anti-set packer of the described blocking piece type of claim 2 or 3, it is characterized in that being positioned at the build the pressure central tube outside of cylinder below fixed cover is arranged, the lower outside of urceolus and the upper inner of fixed cover are threaded connection and are fixed together, the lower inside of fixed cover is provided with the inner convex platform that is sleeved on the central tube outside, is provided with inboard between the bottom of urceolus and the top of inner convex platform and is fixed on the spacing ring on the central tube lateral wall.
5. according to claim 2 or the anti-set packer of 3 or 4 described blocking piece types, be provided with lock ring between it is characterized in that building the pressure outside lower inside and the central tube of cylinder, build the pressure outside lower inside and the lock ring of cylinder to be threaded connection and be fixed together, axially open is arranged on lock ring, be provided with at least one inside in axially open and be fixed on the anti-rotation nail on central tube, be distributed with the retaining pawl on the inwall of lock ring, the central tube arranged outside of the journey of dividing a word with a hyphen at the end of a line on corresponding lock ring position has the cylindrical shell pawl matched with the retaining pawl.
6. according to claim 1 or the anti-set packer of 2 or 3 or 4 or 5 described blocking piece types, it is characterized in that the packing element packing device comprises that short rubber cylinder, quantity are no less than long packing element type and the lower short rubber cylinder of one; Upper short rubber cylinder, long packing element type and lower short rubber cylinder are sleeved on the central tube outside from top to bottom successively, and the inwall middle part of long packing element type is fixed with support ring, and the pushing out ring seal groove is arranged on the inwall of support ring, and the pushing out ring sealing ring is installed in the pushing out ring seal groove.
7. blocking piece type according to claim 6 is prevented set packer, and the quantity that it is characterized in that long packing element type is two.
8. according to the anti-set packer of the described blocking piece type of claim 6 or 7, it is characterized in that between the top of short rubber cylinder, upper short rubber cylinder and long packing element type, between adjacent long packing element type, between long packing element type and lower short rubber cylinder, the bottom of lower short rubber cylinder is provided with the baffle ring be sleeved on outside central tube.
9. according to claim 6 or the anti-set packer of 7 or 8 described blocking piece types, the outside, lower end that it is characterized in that interstage sleeve is fixed with outer lug boss, the outside, upper end of positioning sleeve is fixed with lower outer lug boss, in the upper mounting groove of the baffle ring top at upper short rubber cylinder top between upper outside boss and central tube, in the lower mounting groove of baffle ring bottom between lower outer lug boss and central tube of lower short rubber cylinder bottom.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310424039.1A CN103470210B (en) | 2013-09-17 | 2013-09-17 | The anti-set packer of blocking piece type |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310424039.1A CN103470210B (en) | 2013-09-17 | 2013-09-17 | The anti-set packer of blocking piece type |
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| Publication Number | Publication Date |
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| CN103470210A true CN103470210A (en) | 2013-12-25 |
| CN103470210B CN103470210B (en) | 2016-01-13 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201310424039.1A Active CN103470210B (en) | 2013-09-17 | 2013-09-17 | The anti-set packer of blocking piece type |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115680550A (en) * | 2022-09-07 | 2023-02-03 | 韩玉中 | Stable and durable packer |
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|---|---|---|---|---|
| US4655286A (en) * | 1985-02-19 | 1987-04-07 | Ctc Corporation | Method for cementing casing or liners in an oil well |
| CN101165310A (en) * | 2006-10-18 | 2008-04-23 | 刘宜贵 | One-way slip hydraulic base sealed packer |
| CN101265789A (en) * | 2008-05-09 | 2008-09-17 | 中国石油天然气集团公司 | Compound pressurized cyclone tail tube hanging packer |
| CN101503952A (en) * | 2008-02-04 | 2009-08-12 | 中国石油化工股份有限公司 | Seat seal mechanism used for packing type tail pipe hanger |
-
2013
- 2013-09-17 CN CN201310424039.1A patent/CN103470210B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4655286A (en) * | 1985-02-19 | 1987-04-07 | Ctc Corporation | Method for cementing casing or liners in an oil well |
| CN101165310A (en) * | 2006-10-18 | 2008-04-23 | 刘宜贵 | One-way slip hydraulic base sealed packer |
| CN101503952A (en) * | 2008-02-04 | 2009-08-12 | 中国石油化工股份有限公司 | Seat seal mechanism used for packing type tail pipe hanger |
| CN101265789A (en) * | 2008-05-09 | 2008-09-17 | 中国石油天然气集团公司 | Compound pressurized cyclone tail tube hanging packer |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115680550A (en) * | 2022-09-07 | 2023-02-03 | 韩玉中 | Stable and durable packer |
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| CN103470210B (en) | 2016-01-13 |
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Effective date of registration: 20201110 Address after: 100120 Beijing Xicheng District six laying Kang Patentee after: CHINA NATIONAL PETROLEUM Corp. Patentee after: CNPC Xibu Drilling Engineering Co.,Ltd. Address before: 830026 science and technology management division, West drilling and Drilling Engineering Research Institute, No. 68, South Central Road, Urumqi, the Xinjiang Uygur Autonomous Region Patentee before: CNPC Xibu Drilling Engineering Co.,Ltd. |
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