CN104265234A - Constant-pressure classified deblocking packer - Google Patents

Constant-pressure classified deblocking packer Download PDF

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Publication number
CN104265234A
CN104265234A CN201410502601.2A CN201410502601A CN104265234A CN 104265234 A CN104265234 A CN 104265234A CN 201410502601 A CN201410502601 A CN 201410502601A CN 104265234 A CN104265234 A CN 104265234A
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CN
China
Prior art keywords
central tube
piston
packer
well
flushing
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Granted
Application number
CN201410502601.2A
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Chinese (zh)
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CN104265234B (en
Inventor
康庆刚
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Daqing Kangsheng Petroleum Energy-saving Technology Development Co., Ltd.
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康庆刚
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Priority to CN201410502601.2A priority Critical patent/CN104265234B/en
Publication of CN104265234A publication Critical patent/CN104265234A/en
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Classifications

    • EFIXED CONSTRUCTIONS
    • E21EARTH DRILLING; MINING
    • E21BEARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B33/00Sealing or packing boreholes or wells
    • E21B33/10Sealing or packing boreholes or wells in the borehole
    • E21B33/12Packers; Plugs
    • E21B33/122Multiple string packers

Abstract

A novel classified deblocking packer is characterized by comprising an upper joint, an upper connecting sleeve, a boosting piston, a deblocking pin, a center tube, a spring, a well washing piston, a pressing cap, a sealing ring, a base, an outer center tube, an upper rubber cylinder, an upper retaining ring, a middle rubber cylinder, a lower retaining ring, a lower rubber cylinder, a lower connecting sleeve, a set packing piston, a clamp spring sleeve, a clamp spring seat, a clamp spring, a set packing pin and a lower joint. The novel classified deblocking packer has the advantages that temperature-resistant and pressure-bearing performances are excellent, the novel classified deblocking packer can be successfully tripped in an oil well, deblocking can be realized step by step from top to bottom in the oil well, and the novel classified deblocking packer can solve the problem that a conventional step-by-step deblocking packer is deblocked in advance as a deblocking pin 4 is sheared in advance due to excessive load during set packing.

Description

Constant pressure stepped-depacking packer
Technical field
The present invention relates to a kind of novel stepped-depacking packer, specifically a kind of constant pressure stepped-depacking packer.
Background technology
At present, Y341 well packer capable of flushing well can only meet the requirement of two to the three layers of separate layer water injection string in oil field substantially, and depositing uses multiple-string packer.When multistage water injection inspection string operation, multiple packer needs a deblocking, and the deblocking power of each packer is 5-6 ton, three need more than 18 tons with the deblocking power of upper packer, add tubing string self gravitation, by 30 tons of ultimate tensions close to workover rig, site operation risk is larger.And conventional gradually deblocking packer due to when setting deblocking pin can bear larger load, the deblocking pin easily occurring in packer when setting is cut off in advance, causes the problem of packer from opening in advance.
Summary of the invention
The object of this invention is to provide a kind of novel stepped-depacking packer, solve the problem that deblocking in advance easily occurs separated-zone water infection oil field well gradually deblocking packer, and realize the object that multiple-string packer reaches classification deblocking from top to bottom successively.
Technical scheme of the present invention is: a kind of novel stepped-depacking packer, it is characterized in that: comprise top connection, upper joint sleeve, boosting piston, deblocking pin, central tube, spring, well-flushing piston, pressure cap, joint ring, base, exterior central tube, upper packing element, upper baffle ring, middle packing element, lower baffle ring, lower rubber cylinder, lower joint sleeve, set piston, jump ring cover, clip spring seat, jump ring, set pin and lower contact, the wall of top connection is uniformly distributed along the circumference four hollow holes, at each hollow hole built with a boosting piston, top connection is enclosed within outside the upper end of central tube, and deblocking pin is installed between top connection and central tube, spring housing is contained in outside central tube, makes the upper end of spring withstand on the lower end of top connection, well-flushing piston bush is outside central tube, the upper end of well-flushing piston and the lower end in contact of spring, upper joint sleeve is enclosed within the outside of boosting piston, deblocking pin, central tube, spring and well-flushing piston, and the upper end of upper joint sleeve is contacted with the leave from office terrace of the outward flange on top connection top, the internal thread of pressure cap bottom is connected with the external screw thread on base top, and the joint ring that the upper inner of pressure cap will be positioned at base top compresses, and becomes to coordinate squeezed state with joint ring, and pressure cap is inserted in central tube and extrusion spring makes it to become compressive state, in the bottom of upper joint sleeve, the position corresponded between pressure cap and well-flushing piston is circumferentially provided with radial well washing hole, the outside of base and the lower end inside of upper joint sleeve are threaded connection, exterior central tube is enclosed within outside central tube, the upper end of exterior central tube and the interior side contacts of base bottom, and upper packing element, upper baffle ring, middle packing element, lower baffle ring, lower rubber cylinder are enclosed within outside exterior central tube from top to bottom successively, the upper end of lower joint sleeve is enclosed within outside exterior central tube, and with the lower end in contact of lower rubber cylinder, exterior central tube and between lower joint sleeve and central tube gap as well-flushing passage, set piston bush outside central tube, and be threaded with the lower end of lower joint sleeve, inlet opening is provided with corresponding to setting piston place at central tube, jump ring is contained in the cannelure outside clip spring seat, and clip spring seat is enclosed within outside central tube, and is sitting on the step surface outside central tube, and the upper end of this clip spring seat is relative with the lower end setting piston, the top of jump ring cover is enclosed within the outside setting piston and clip spring seat, and is threaded connection with the outside setting piston, the draw-in groove of the inverted trapezoidal that a few row coordinates with jump ring is provided with in the inner side of jump ring cover lower end, the upper inner of lower contact is threaded with the lower end outside of central tube, and the lower end that jump ring is overlapped is sleeved on the undergauge step place of lower contact upper end, install in the lower end of jump ring cover and the upper end socket place of lower contact and set pin, sawtooth tooth is provided with in the inner side of piston.The wall of the central tube at corresponding spring place is provided with radial direction through hole.
Under packer behind precalculated position, down-hole, oil pipe is suppressed, hydraulic pressure inlet opening under central tube acts on and sets on piston, set piston and promote lower joint sleeve, jump ring cover is up and cut off and set pin, compression packing element, packing element diameter under responsive to axial force becomes large and is tightly attached to Seal Oil casing annulus on casing inner diameter; After laying down tubing pressure, jump ring cover is locked on clip spring seat by jump ring, and packer is in sealing state all the time;
While set packer suppressed by oil pipe; hydraulic pressure acts on boosting piston through center pipe end inlet opening; boosting piston tightly blocks central tube under the effect of front end sawtooth tooth; overcome the power acted on when setting on deblocking pin; protection deblocking pin is not cut off when high pressure sets state, the phenomenon that deblocking pin may be interrupted when avoiding packer setting.
During well-flushing, flushing fluid acts on well-flushing piston through the eyelet of upper joint sleeve, and promote well-flushing piston stroking upward and Compress Spring, well-flushing passage is opened, and flushing fluid flows through packer by the weep hole of lower connector after the annular space of central tube, exterior central tube; After well-flushing completes, well-flushing piston resets and seal well washing passage under spring force effect.
Upper lifting pipe post, between the packing element and sleeve pipe of packer at different levels under frictional force effect, first upper lifting force acts on the deblocking pin of first order packer, on carry load be greater than tubing string deadweight time, deblocking pin starts stressed, when acting on the power on deblocking pin and being increased to certain load, deblocking pin is cut off, top connection, upper joint sleeve, the compression distance of base and the up packing element of exterior central tube, central tube, lower contact is motionless under frictional force effect between packing element at different levels and sleeve pipe below first order packer, first order packing element loses pressured state, under its own resilient effect, diameter diminishes, removing seal for packer, continue upper lifting pipe post second level packer and repeat above-mentioned action deblocking, until the whole of completed well lower tubular column trip out.
The invention has the beneficial effects as follows: it is excellent that it has heatproof load performance, can remove smoothly in oil well, in well, the advantage of deblocking can be realized simultaneously from top to bottom step by step; Conventional gradually deblocking packer can being avoided when setting simultaneously, because the excessive deblocking pin of load is cut off in advance, causing the phenomenon of packer from opening in advance.
Accompanying drawing explanation
Fig. 1 is sectional structure schematic diagram of the present invention.
Detailed description of the invention
See Fig. 1, a kind of novel stepped-depacking packer of the present invention, comprises top connection 1, upper joint sleeve 2, boosting piston 3, deblocking pin 4, central tube 5, spring 6, well-flushing piston 7, pressure cap 8, joint ring 9, base 10, exterior central tube 11, upper packing element 12, upper baffle ring 13, middle packing element 14, lower baffle ring 15, lower rubber cylinder 16, lower joint sleeve 17, sets piston 18, jump ring cover 19, clip spring seat 20, jump ring 21, sets pin 22 and lower contact 23 forms.First (be uniformly distributed along the circumference four hollow holes on the wall of top connection 1 afterwards 4 boosting pistons 3 to be loaded top connection 1, at each hollow hole built with a boosting piston 3), top connection 1 is enclosed within central tube 5, and deblocking pin 4 is installed, spring 6 is inserted on central tube 5, makes the upper end of spring 6 withstand on the lower end of top connection 1.Well-flushing piston 7 is enclosed within outside central tube 5, the upper end of well-flushing piston 7 and the lower end in contact of spring 6, upper joint sleeve 2 is enclosed within the outside of boosting piston 3, deblocking pin 4, central tube 5, spring 6, well-flushing piston 7, and the upper end of upper joint sleeve 2 is contacted with the leave from office terrace of the outward flange 29 on top connection 1 top.The external screw thread of the internal thread of pressure cap 8 bottom with base 10 top is connected, the joint ring 9 being positioned at base 10 top compresses by the upper inner of pressure cap 8, and coordinate after squeezed state with joint ring 9 one-tenth, pressure cap 8 is inserted in central tube 5 extrusion spring 6 and makes it to become compressive state.The outside of base 10 and the lower end inside of upper joint sleeve 2 are threaded connection, exterior central tube 11 is enclosed within the outside in the middle part of central tube 5, the upper end of exterior central tube 11 and the interior side contacts of base 10 bottom, be enclosed within outside exterior central tube 11 from top to bottom successively by upper packing element 12, upper baffle ring 13, middle packing element 14, lower baffle ring 15, lower rubber cylinder 16.The upper end of lower joint sleeve 17 is enclosed within outside exterior central tube 11, and with the lower end in contact of lower rubber cylinder 16.Piston 18 will be set be enclosed within outside central tube 5, and be threaded with the lower end of lower joint sleeve 17; Inlet opening 25 is provided with corresponding to setting piston 18 place at central tube 5.Be contained in by jump ring 21 after on clip spring seat 20, be enclosed within outside central tube 5, and be sitting on the step surface 24 outside central tube 5, the upper end of this clip spring seat 20 is relative with the lower end setting piston 18.The top of jump ring cover 19 is enclosed within the outside setting piston 18 and clip spring seat 20, and is threaded connection with the outside setting piston 18.The upper inner of lower contact 23 is threaded with the lower end outside of central tube 5, and the lower end making jump ring overlap 19 is sleeved on the undergauge step place of lower contact 23 upper end, installs set pin 22 in the jump ring cover lower end of 19 and the upper end socket place of lower contact 23.Sawtooth tooth is provided with in the inner side of piston 3.The draw-in groove 32 of the inverted trapezoidal that a few row coordinates with jump ring 21 is provided with in the inner side that jump ring overlaps 19 lower ends.
In upper packing element 12, middle packing element 14 and lower rubber cylinder 16; middle packing element 14 elasticity is larger; packing stratum when primary responsibility sets; two limit packing elements (upper packing element 12 and lower rubber cylinder 16) mainly shield; two limit packing elements due to structure design reason elasticity less; when packer setting, first compressive force is applied on the packing element of limit, then by limit packing element, part power is passed to middle packing element, and preventing compressive force to cross in ambassador, packing element distortion is excessive causes damage.
Operating principle of the present invention is:
When setting, to oil pipe, (G.I.H connects 2 of packer 7/ 8) suppress, hydraulic pressure acts on through central tube 5 lower end inlet opening 25 and sets on piston 18, makes to set piston 18 and moves up; Setting piston 18, to drive lower connector 17 and jump ring to overlap 19 up, and cut off and set pin 22; Compress three packing elements 12,14,16, packing element diameter under responsive to axial force becomes large and is tightly attached on the internal diameter of tubing and casing simultaneously, so just seal tubing and casing annular space (namely G.I.H fastening means 2 7/ 85 of oil-pipe external wall and well itself 1/ 2annular space between internal surface of sleeve pipe).After laying down tubing pressure, jump ring overlaps 19 lower end inside draw-in groove 32locked on clip spring seat 20 by jump ring 21, packer is in sealing state all the time.
While set packer suppressed by described oil pipe; the inlet opening 26 of hydraulic pressure through central tube 5 upper end acts on boosting piston 3; boosting piston 3 tightly blocks central tube 5 under the effect of front end sawtooth tooth; overcome the power acted on when setting on deblocking pin 4; protection deblocking pin 4 is not cut off when high pressure sets state, the phenomenon that deblocking pin 4 may be interrupted when avoiding packer setting.The wall of the central tube 5 at corresponding spring 6 place is provided with radial direction through hole 27, radial direction through hole 27 is that flushing fluid acts on well-flushing piston 7 through the eyelet of upper joint sleeve 2 when well-flushing, now the eyelet place of upper joint sleeve 2 is the pressure in the annular space of described tubing and casing, pressure acts on the lower end of well-flushing piston 7 herein, and due to well-flushing piston 7 upper end that exists of radial direction through hole 27 be pressure in oil pipe, during well-flushing, tubing and casing pressure is greater than oily overpressure, so well-flushing piston 7 can be made up, if there is no radial direction through hole 27, well-flushing piston 7 upper end then can be caused to be in a closed air chamber state, when guild on well-flushing piston 7 causes in the compressed-air actuated result of confined space, so have radial direction through hole 27 oily overpressure is imported to well-flushing piston 7 upper end, it is made to produce pressure differential when well-flushing.
The present invention is when well-flushing, flushing fluid acts on well-flushing piston 7 through the well washing hole 31 of upper joint sleeve 2, promote the up and Compress Spring 6 of well-flushing piston 7, well-flushing passage 30 is opened, and the weep hole 28 of flushing fluid by lower joint sleeve 17 after the annular space between central tube 5 and exterior central tube 11 flows through packer.After well-flushing completes, well-flushing piston 7 resets and seal well washing passage under the effect of spring 6 elastic force.
During deblocking of the present invention, upper lifting pipe post, at packing element and sleeve pipe (5 of the well itself of packer at different levels 1/ 2sleeve pipe) between under frictional force effect, first upper lifting force acts on the deblocking pin 4 of first order packer, on carry load be greater than tubing string deadweight time, deblocking pin 4 starts stressed, when acting on the power on deblocking pin 4 and being increased to certain load, deblocking pin 4 is cut off, the distance of the compression of top connection 1, upper joint sleeve 2, base 10 and the up packing element of exterior central tube 11, the packing element 12,14,16 of central tube 5, lower contact 23 packer at different levels below first order packer and sleeve pipe (5 of well itself 1/ 2sleeve pipe) between motionless under frictional force effect, the packing element (12,14,16) of first order packer loses pressured state, under its own resilient effect, diameter diminishes, first order removing seal for packer, continue upper lifting pipe post second level packer and repeat above-mentioned action deblocking, until the whole of completed well lower tubular column trip out.When applying, every mouthful of well can be placed with several packers according to geology needs at the position of stratum of specifying.

Claims (5)

1. a novel stepped-depacking packer, it is characterized in that: comprise top connection 1, upper joint sleeve 2, boosting piston 3, deblocking pin 4, central tube 5, spring 6, well-flushing piston 7, pressure cap 8, joint ring 9, base 10, exterior central tube 11, upper packing element 12, upper baffle ring 13, middle packing element 14, lower baffle ring 15, lower rubber cylinder 16, lower joint sleeve 17, set piston 18, jump ring cover 19, clip spring seat 20, jump ring 21, set pin 22 and lower contact 23, the wall of top connection 1 is uniformly distributed along the circumference four hollow holes, at each hollow hole built with a boosting piston 3, top connection 1 is enclosed within outside the upper end of central tube 5, and between top connection 1 and central tube 5, deblocking pin 4 is installed, spring 6 is sleeved on outside central tube 5, makes the upper end of spring 6 withstand on the lower end of top connection 1, well-flushing piston 7 is enclosed within outside central tube 5, the upper end of well-flushing piston 7 and the lower end in contact of spring 6, upper joint sleeve 2 is enclosed within the outside of boosting piston 3, deblocking pin 4, central tube 5, spring 6 and well-flushing piston 7, and the upper end of upper joint sleeve 2 is contacted with the leave from office terrace 29 of the outward flange on top connection 1 top, the internal thread of pressure cap 8 bottom is connected with the external screw thread on base 10 top, the joint ring 9 being positioned at base 10 top compresses by the upper inner of pressure cap 8, and coordinate squeezed state with joint ring 9 one-tenth, and pressure cap 8 is inserted in central tube 5 extrusion spring 6 and makes it to become compressive state, in the bottom of upper joint sleeve 2, the position corresponded between pressure cap 8 and well-flushing piston 7 is circumferentially provided with radial well washing hole 31, the outside of base 10 and the lower end inside of upper joint sleeve 2 are threaded connection, exterior central tube 11 is enclosed within outside central tube 5, the upper end of exterior central tube 11 and the interior side contacts of base 10 bottom, and upper packing element 12, upper baffle ring 13, middle packing element 14, lower baffle ring 15, lower rubber cylinder 16 are enclosed within outside exterior central tube 11 from top to bottom successively, the upper end of lower joint sleeve 17 is enclosed within outside exterior central tube 11, and with the lower end in contact of lower rubber cylinder 16, exterior central tube 11 and between lower joint sleeve 17 and central tube 5 gap as well-flushing passage 30, set piston 18 to be enclosed within outside central tube 5, and be threaded with the lower end of lower joint sleeve 17, inlet opening 25 is provided with corresponding to setting piston 18 place at central tube 5, jump ring 21 is contained in the cannelure outside clip spring seat 20, and clip spring seat 20 is enclosed within outside central tube 5, and is sitting on the step surface 24 outside central tube 5, and the upper end of this clip spring seat 20 is relative with the lower end setting piston 18, the top of jump ring cover 19 is enclosed within the outside setting piston 18 and clip spring seat 20, and is threaded connection with the outside setting piston 18, the draw-in groove 32 of the inverted trapezoidal that a few row coordinates with jump ring 21 is provided with in the inner side that jump ring overlaps 19 lower ends, the upper inner of lower contact 23 is threaded with the lower end outside of central tube 5, and the lower end making jump ring overlap 19 is sleeved on the undergauge step place of lower contact 23 upper end, install in the jump ring cover lower end of 19 and the upper end socket place of lower contact 23 and set pin 22, sawtooth tooth is provided with in the inner side of piston 3.
2. the novel stepped-depacking packer according to claims 1, be characterised in that, under packer behind precalculated position, down-hole, oil pipe is suppressed, hydraulic pressure inlet opening under central tube (5) acts on and sets (18) on piston, sets piston (18) and promotes lower joint sleeve (17), and jump ring cover (19) is up and cut off and set pin (22), compression packing element, packing element diameter under responsive to axial force becomes large and is tightly attached to Seal Oil casing annulus on casing inner diameter; After laying down tubing pressure, jump ring cover (19) is locked on clip spring seat (20) by jump ring (21), and packer is in sealing state all the time;
While set packer suppressed by oil pipe; hydraulic pressure acts on boosting piston (3) through central tube (5) upper end inlet opening; boosting piston (3) tightly blocks central tube (5) under the effect of front end sawtooth tooth; overcome the power acted on when setting on deblocking pin (4); protection deblocking pin (4) is not cut off when high pressure sets state, the phenomenon that deblocking pin (4) may be interrupted when avoiding packer setting.
3. the novel stepped-depacking packer according to claims 1, be characterised in that, during well-flushing, flushing fluid acts on well-flushing piston (7) through the eyelet of upper joint sleeve (2), promote well-flushing piston (7) up and Compress Spring (6), well-flushing passage is opened, and flushing fluid flows through packer by the weep hole of lower connector (17) after the annular space of central tube (5), exterior central tube (11); After well-flushing completes, well-flushing piston (7) resets and seal well washing passage under spring (6) elastic force effect.
4. the novel stepped-depacking packer according to claims 1, be characterised in that, upper lifting pipe post, between the packing element and sleeve pipe of packer at different levels under frictional force effect, first upper lifting force acts on the deblocking pin (4) of first order packer, on carry load be greater than tubing string deadweight time, deblocking pin (4) starts stressed, when acting on the power on deblocking pin and being increased to certain load, deblocking pin (4) is cut off, top connection (1), upper joint sleeve (2), the compression distance of base (10) and exterior central tube (11) up packing element, central tube (5), lower contact (23) is motionless under frictional force effect between packing element at different levels and sleeve pipe below first order packer, first order packing element loses pressured state, under its own resilient effect, diameter diminishes, removing seal for packer, continue upper lifting pipe post second level packer and repeat above-mentioned action deblocking, until the whole of completed well lower tubular column trip out.
5. the novel stepped-depacking packer according to claims 1, is characterised in that, the wall of the central tube 5 at corresponding spring 6 place is provided with radial direction through hole 27.
CN201410502601.2A 2014-09-28 2014-09-28 Constant pressure stepped-depacking packer Active CN104265234B (en)

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CN104265234B CN104265234B (en) 2016-08-24

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104929563A (en) * 2015-05-27 2015-09-23 中国石油天然气股份有限公司 Water injection packer
CN111005700A (en) * 2018-10-08 2020-04-14 中国石油化工股份有限公司 Quick-release hydraulic control packer and construction method
CN111456672A (en) * 2020-04-01 2020-07-28 刘超 Hydraulic expansion type packer

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4180132A (en) * 1978-06-29 1979-12-25 Otis Engineering Corporation Service seal unit for well packer
RU2105862C1 (en) * 1995-01-26 1998-02-27 Акционерное общество открытого типа "Удмуртнефть" Packer
CN201953346U (en) * 2011-03-07 2011-08-31 大庆金源达机械有限公司 Compression type step-by-step deblocking packer
CN102337854A (en) * 2011-09-05 2012-02-01 梁伟成 Washable well type gradual unpacking packer
CN203347736U (en) * 2013-07-18 2013-12-18 陈成才 Water-injection packer capable of being subjected to deblocking step by step
CN203499628U (en) * 2012-12-25 2014-03-26 梁伟成 Well washing type step-by-step deblocking expandable long rubber sleeve packer
CN204175230U (en) * 2014-09-28 2015-02-25 康庆刚 Constant pressure stepped-depacking packer

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4180132A (en) * 1978-06-29 1979-12-25 Otis Engineering Corporation Service seal unit for well packer
RU2105862C1 (en) * 1995-01-26 1998-02-27 Акционерное общество открытого типа "Удмуртнефть" Packer
CN201953346U (en) * 2011-03-07 2011-08-31 大庆金源达机械有限公司 Compression type step-by-step deblocking packer
CN102337854A (en) * 2011-09-05 2012-02-01 梁伟成 Washable well type gradual unpacking packer
CN203499628U (en) * 2012-12-25 2014-03-26 梁伟成 Well washing type step-by-step deblocking expandable long rubber sleeve packer
CN203347736U (en) * 2013-07-18 2013-12-18 陈成才 Water-injection packer capable of being subjected to deblocking step by step
CN204175230U (en) * 2014-09-28 2015-02-25 康庆刚 Constant pressure stepped-depacking packer

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104929563A (en) * 2015-05-27 2015-09-23 中国石油天然气股份有限公司 Water injection packer
CN104929563B (en) * 2015-05-27 2017-10-17 中国石油天然气股份有限公司 Water injection packer
CN111005700A (en) * 2018-10-08 2020-04-14 中国石油化工股份有限公司 Quick-release hydraulic control packer and construction method
CN111005700B (en) * 2018-10-08 2021-11-30 中国石油化工股份有限公司 Quick-release hydraulic control packer and construction method
CN111456672A (en) * 2020-04-01 2020-07-28 刘超 Hydraulic expansion type packer
CN111456672B (en) * 2020-04-01 2022-04-26 大庆市地油石油机械有限公司 Hydraulic expansion type packer

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Effective date of registration: 20190819

Address after: Heilongjiang province Daqing City Honggang District 163000 Qing Nan Industrial Park

Patentee after: Daqing Kangsheng Petroleum Energy-saving Technology Development Co., Ltd.

Address before: 163000 Xiyuan Street, Ximen, Guangxia New City, Jeanhu Road District, Daqing City, Heilongjiang Province, 193

Patentee before: Kang Qinggang