CN107989568B - A kind of multistage can desealed water-swelling packer and method - Google Patents

A kind of multistage can desealed water-swelling packer and method Download PDF

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Publication number
CN107989568B
CN107989568B CN201711205975.8A CN201711205975A CN107989568B CN 107989568 B CN107989568 B CN 107989568B CN 201711205975 A CN201711205975 A CN 201711205975A CN 107989568 B CN107989568 B CN 107989568B
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China
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deblocking
baffle ring
central tube
segment
equipped
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CN201711205975.8A
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Chinese (zh)
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CN107989568A (en
Inventor
李明
熊珂英
张子鹏
李波
张兆杰
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东阳市天杨建筑工程设计有限公司
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    • 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
    • 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
    • E21B23/00Apparatus for displacing, setting, locking, releasing, or removing tools, packers or the like in the boreholes or wells

Abstract

The present invention relates to a kind of multistages can desealed water-swelling packer and method.Its technical solution is: including three sections of central tubes, one group of hydro-expansive rubber and two groups of deblocking devices, hydro-expansive rubber is processed in the outside of three sections of central tubes and two groups of deblocking devices, it is equipped with first group of deblocking device between first segment and second segment central tube, second group of deblocking device is equipped between second segment central tube and third section central tube;First segment central tube, second segment central tube, third section central tube, first group of deblocking device and second group of deblocking device outer wall be machined with hydro-expansive rubber.Beneficial effect is: the present invention has multistage solution seal structure by design, the contraction of longer hydro-expansive rubber may be implemented and realize deblocking, can be big to avoid resistance when well workover because of hydro-expansive rubber, the case where can not stirring, also avoids mandatory increase pulling force and carry out drawing;It also avoids carrying out problem at high cost caused by milling operation, duty cycle is grown by junk mill.

Description

A kind of multistage can desealed water-swelling packer and method

Technical field

The present invention relates to a kind of petroleum underground operation tool and method, in particular to a kind of multistage can desealed water-swellable Packer and method.

Background technique

Packer is a kind of application of petroleum industry to meet certain technology purpose of oil-water well or technique for oil formation The needs of measure, by the specific purpose tool for the laminated distributor under well packing that steel body, packer accessory, control section form, formation testing, oil recovery, water filling The packer of respective type is required with oil formation improvement.Including self-sealing, expanding, compression and fabricated structure, application Field is different, when encountering the oil well of open hole well and casing damage, is passed through using four kinds of above-mentioned packers mechanical setting Or the hydraulic base sealed effect for being unable to reach sealing, it can be using the water-swelling packer researched and developed in recent years.Currently, existing chance Water swell packers are generally used for multilayer position, can not carry out hydraulic or mechanical setting layer position, can smoothly go into the well, and realize and meet water Expansion.

Such as Chinese patent literature Publication No. 202832366U, patent name is a kind of " oil and water contact expansible formula packing Device ", including two tubing couplings, the both ends of the packer are respectively arranged at, outboard end is connect with tail pipe or screen casing respectively;Envelope Every device matrix, both ends are connect with the inner end of two tubing couplings respectively;Two limit bases, one end of each limit base It is fixed between the tubing coupling and the packer matrix, the other end is equipped with embedding along the packer matrix extending direction Enter slot;It meets oil and meets water self-expansion type rubber, both ends are respectively embedded into the embedded groove being oppositely arranged, and are fixed on the packing On the outside of device matrix.It effectively prevent meeting the case where oil chance water self-expansion type rubber friction damage is turned up with end, reinforces sealing effect. Itself the problem is that: since there is always oil water mixture in underground, in this way, packer is just constantly in swelling state.And working as needs When carrying out well workover, need to take out entire tubing string, original water-swelling packer just as be constantly in swelling state, Resistance is big, can not stir;If mandatory increase pulling force carries out drawing, due to the swabbing action of packer, to formation damage power It is too big, in addition by the injection of forward direction stratum crosslinking agent, curing agent, acidulant and sand etc., the consolidated structures of original formation are all It destroys, it is serious to cause oil well disused well;Another method is to carry out milling operation by junk mill, packer is ground off, in this way The problem is that at high cost, duty cycle is long, and is easily destroyed oil-well wall or casing.

In addition, the length for the hydro-expansive rubber that existing water-swelling packer uses is generally shorter, sometimes cannot Realization is fully sealed, even if the hydro-expansive rubber is lengthened during fabrication, since hydro-expansive rubber not necessarily can be uniform Expansion, so, still cannot completely reliable realization sealing;And after hydro-expansive rubber lengthens, due to existing technology Can not achieve deblocking, the activity duration is longer when well workover, and a possibility that abrasion borehole wall or casing occur is higher, so, it is practical raw Seldom using the packer for lengthening hydro-expansive rubber in production.

Summary of the invention

The purpose of the present invention is to drawbacks described above of the existing technology, provide a kind of multistage can desealed to meet water swollen Swollen packer and method can solve the contraction of hydro-expansive rubber and realize deblocking, hydro-expansive rubber also can be enhanced Leakproofness ensure that packing effect.

A kind of multistage that the present invention mentions can desealed water-swelling packer, technical solution is: including three Duan Zhongxin Pipe, one group of hydro-expansive rubber and two groups of deblocking devices, hydro-expansive rubber are processed in three sections of central tubes and two groups of deblocking devices Outside, first group of deblocking device (a) is equipped between first segment and second segment central tube, in second segment central tube and third section Second group of deblocking device (b) is equipped between heart pipe;Wherein, every group of deblocking device includes the first baffle ring (3), deblocking bushing pipe (4), the One deblocking shear pin (5), the second deblocking shear pin (6) and the second baffle ring (7),

The middle part of deblocking bushing pipe (4) is fixed first segment central tube (9) by the first deblocking shear pin (5), passes through second It unseals shear pin (6) and fixes second segment central tube (10), fix the first baffle ring in the middle part outer wall of the first segment central tube (9) (3), the upper end of first segment central tube (9) is equipped with top connection (1), fixes the in the middle part outer wall of the second segment central tube (10) The outer wall of two baffle rings (7), third section central tube (18) is equipped with third baffle ring (19), and the lower end of the third section central tube (18) is set There are lower contact (8);

The first segment central tube (9), second segment central tube (10), third section central tube (18), first group of decapsulation The outer wall for setting (a) and second group of deblocking device (b) is machined with hydro-expansive rubber (2).

Preferably, the lower end of above-mentioned first segment central tube (9) is equipped with the first deblocking baffle ring (12), the deblocking bushing pipe (4) it is respectively equipped with the first convex shoulder (11) and the second convex shoulder (14) on the inside of both ends, the upper end of the second segment central tube (10) is set Have the second deblocking baffle ring (13), unseal bushing pipe (4) the first convex shoulder (11) and the second convex shoulder (14) respectively with first segment central tube (9) the second deblocking baffle ring (13) cooperation of the first deblocking baffle ring (12) and second segment central tube (10).

Preferably, the inward flange of above-mentioned the first convex shoulder (11) is equipped with the interior steel loop (16) of protrusion, for unsealing with first Baffle ring (12) secure fit, the inward flange of second convex shoulder (14) are equipped with the interior steel loop (16) of protrusion, for unsealing with second Baffle ring (13) secure fit.

Preferably, the outer edge of the first above-mentioned deblocking baffle ring (12) and the second deblocking baffle ring (13) is respectively equipped with protrusion Outer steel loop (15).

Preferably, it is isosceles trapezoidal structure, the first baffle ring (3) that above-mentioned the first baffle ring (3) and the second baffle ring (7), which are section, Bottom be fixedly connected with the outer wall of first segment central tube (9), the bottom of the second baffle ring (7) and second segment central tube (10) it is outer Wall is fixedly connected, and the inner cavity of first baffle ring (3) and the second baffle ring (7) is hollow structure.

Preferably, two waists of above-mentioned the first baffle ring (3) and the second baffle ring (7) are equipped with intercommunicating pore (7.1), first The lumen loading of baffle ring (3) and the second baffle ring (7) has water-absorbing resin, and water-absorbing resin is connected to hydro-expansive rubber (2), meets water It is raised (17) that bulge is formed after expansion.

Preferably, the length of above-mentioned deblocking bushing pipe (4) is less than the expansion between the first baffle ring (3) and the second baffle ring (7) The one third of length.

The beneficial effects of the present invention are: the present invention has multistage solution seal structure by design, hydro-expansive rubber may be implemented Contraction and realize deblocking, can to avoid when well workover because hydro-expansive rubber resistance it is big, the case where can not stirring, also avoid Mandatory increase pulling force carries out drawing, due to the swabbing action of packer, generates huge destructive power to stratum;It also avoids Problem at high cost caused by milling operation, duty cycle is grown is carried out by junk mill;

The present invention is filled with water-absorbing resin, when water swelling, hydro-expansive rubber by being equipped with multiple baffle rings in cavity It squeezes to form bulge protrusion along the direction of two waists, to enhance the leakproofness of hydro-expansive rubber, avoid uneven The bad problem of sealing that occurs of expansion;

The present invention, which passes through, is equipped with deblocking bushing pipe and shear pin cooperation, and is connect by unsealing bushing pipe with each section of central tube Effect drives hydro-expansive rubber to narrow, so that the active force between packer and the borehole wall is declined to a great extent, and then eliminate and mentioned Swabbing action in journey avoids the destruction to the consolidated structures on stratum;

Further more, the Design of length of deblocking bushing pipe there are certain requirements, specifically unseal away from length less than the first baffle ring and The one third of length of run between second baffle ring, the case where avoiding hydro-expansive rubber from being pulled off, and also each baffle ring also rises To booster action, to ensure that packer proposes completion on the whole.

Detailed description of the invention

Attached drawing 1 is structural schematic diagram of the invention;

The structural schematic diagram of first step when attached drawing 2 is present invention deblocking;

Attached drawing 3 is structural schematic diagram when being all unfolded when present invention deblocking;

Attached drawing 4 is the enlarged diagram for unsealing the first embodiment at bushing pipe and shear pin;

Attached drawing 5 is the enlarged diagram for unsealing second of embodiment at bushing pipe and shear pin;

Attached drawing 6 is the enlarged drawing before baffle ring expansion;

Attached drawing 7 is the enlarged drawing after baffle ring expansion;

Attached drawing 8 is the enlarged drawing of the baffle ring of another structure before inflation;

In upper figure: top connection 1, hydro-expansive rubber 2, the first baffle ring 3, deblocking bushing pipe 4, first unseal shear pin 5, second and solve Seal shear pin 6, the second baffle ring 7, lower contact 8, first segment central tube 9, second segment central tube 10, the solution block of the first convex shoulder 11, first Ring 12, second unseals baffle ring 13, the second convex shoulder 14, the second convex shoulder 14, outer steel loop 15, interior steel loop 16, bulge protrusion 17, third section Central tube 18;First group of deblocking device (a), second group of deblocking device (b), intercommunicating pore 7.1.

Specific embodiment

Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings, it should be understood that preferred reality described herein Apply example only for the purpose of illustrating and explaining the present invention and is not intended to limit the present invention.

Embodiment 1, referring to attached drawing 1 and 4, a kind of multistage that the present invention mentions can desealed water-swelling packer, skill Art scheme is: including three sections of central tubes, one group of hydro-expansive rubber and two groups of deblocking devices, hydro-expansive rubber is processed at three sections The outside of central tube and two groups of deblocking devices, is equipped with first group of deblocking device a between first segment and second segment central tube, and second Second group of deblocking device b is equipped between section central tube and third section central tube;Wherein, every group of deblocking device include the first baffle ring 3, It unseals bushing pipe 4, first and unseals the deblocking shear pin 6 of shear pin 5, second and the second baffle ring 7,

It is cut by the first fixed first segment central tube 9 of deblocking shear pin 5 by the second deblocking at the middle part of the deblocking bushing pipe 4 The fixed second segment central tube 10 of nail 6, fixes the first baffle ring 3, first segment central tube in the middle part outer wall of the first segment central tube 9 9 upper end is equipped with top connection 1, fixes the second baffle ring 7, third section central tube 18 in the middle part outer wall of the second segment central tube 10 Outer wall be equipped with third baffle ring 19, the lower end of the third section central tube 18 is equipped with lower contact 8;

The first segment central tube 9, second segment central tube 10,18, first groups of deblocking device a of third section central tube and The outer wall of two groups of deblocking device b is machined with hydro-expansive rubber 2.

Referring to attached drawing 4, the lower end of first segment central tube 9 of the invention is equipped with the first deblocking baffle ring 12, the deblocking lining The first convex shoulder 11 and the second convex shoulder 14 are respectively equipped on the inside of the both ends of pipe 4, the upper end of the second segment central tube 10 is equipped with second Baffle ring 13 is unsealed, the first convex shoulder 11 and the second convex shoulder 14 for unsealing bushing pipe 4 unseal baffle ring with the first of first segment central tube 9 respectively 12 and second segment central tube 10 second deblocking baffle ring 13 cooperate;Similarly, between second segment central tube and third section central tube It is identical as the deblocking device between first and second section of central tube to unseal device, and can be further added by according to the length of running string What deblocking device and several sections of central tubes.

It is isosceles trapezoidal structure, the first baffle ring 3 that reference attached drawing 6, the first baffle ring 3 of the invention and the second baffle ring 7, which are section, Bottom be fixedly connected with the outer wall of first segment central tube 9, the bottom of the second baffle ring 7 and the outer wall of second segment central tube 10 are fixed Connection, and the inner cavity of first baffle ring 3 and the second baffle ring 7 is hollow structure;

Two waists of the first baffle ring 3 and the second baffle ring 7 are equipped with intercommunicating pore 7.1, in the first baffle ring 3 and the second baffle ring 7 Lumen loading has water-absorbing resin, and water-absorbing resin is connected to hydro-expansive rubber 2, and bulge protrusion 17 is formed after water-swellable, from And dilatancy is enhanced at two waists, so that the extending direction of two waists be made to form expansion protrusion, further enhance chance The leakproofness of water-expansible rubber avoids the non-uniform bad problem of sealing for expanding and occurring.

Third baffle ring outside third section central tube is also above structure, is repeated no more.

In addition, three of length less than the length of run between the first baffle ring 3 and the second baffle ring 7 of above-mentioned deblocking bushing pipe 4 / mono-, it is preferred that 1/5th, the case where being pulled off in this way to avoid hydro-expansive rubber, and the second baffle ring and Three baffle rings also function to booster action, to ensure that packer proposes completion on the whole;In addition, the second baffle ring 7 and third baffle ring it Between the deblocking bushing pipe of the deblocking bushing pipe installed also between the first baffle ring 3 and the second baffle ring 7 it is identical.

When deblocking, referring to attached drawing 2 and 3, the first deblocking shear pin 5 and the second deblocking shear pin 6 are successively cut, expanded chance Water-expansible rubber constantly narrows, attenuates, and then release the pressure of expansion, in addition above mention in during moving up of bushing pipe 4 of deblocking When, the third baffle ring of the second baffle ring and lower part also plays a supporting role to hydro-expansive rubber, and entire packing is effectively guaranteed Device above mentions.

A kind of multistage that the present invention mentions can desealed water-swelling packer application method, technical solution is to include Following steps:

Firstly, assembling multistage can desealed water-swelling packer, including three sections of central tubes, one group of hydro-expansive rubber and Two groups of deblocking devices, hydro-expansive rubber are processed in the outside of three sections of central tubes and two groups of deblocking devices, in first segment and second It is equipped with first group of deblocking device a between section central tube, second group of deblocking is equipped between second segment central tube and third section central tube Device b;Wherein, every group of deblocking device includes the first baffle ring 3, the deblocking deblocking deblocking of shear pin 5, second of bushing pipe 4, first 6 and of shear pin Second baffle ring 7;

It is cut by the first fixed first segment central tube 9 of deblocking shear pin 5 by the second deblocking at the middle part of the deblocking bushing pipe 4 The fixed second segment central tube 10 of nail 6, fixes the first baffle ring 3, first segment central tube in the middle part outer wall of the first segment central tube 9 9 upper end is equipped with top connection 1, fixes the second baffle ring 7, third section central tube 18 in the middle part outer wall of the second segment central tube 10 Outer wall be equipped with third baffle ring 19, the lower end of the third section central tube 18 is equipped with lower contact 8;

The first segment central tube 9, second segment central tube 10,18, first groups of deblocking device a of third section central tube and The outer wall of two groups of deblocking device b is machined with hydro-expansive rubber 2;

Second, by the position to be insulated that makes a reservation in device tripping in open hole well or casing, the chance water of hydro-expansive rubber 2 starts swollen It is swollen, and the first, second, third baffle ring is filled with water-absorbing resin due to inside, and is respectively equipped with intercommunicating pore 7.1 at two waists, inhales Water-resin drives hydro-expansive rubber 2 further to expand after meeting water, forms bulge protrusion 17, further strengthens sealing to the borehole wall Effect;

When third, well workover deblocking, by above mentioning first segment central tube 9, first segment central tube 9 is moved up and is solved first It seals shear pin to cut, first segment central tube 9 continues to move up, when move to deblocking bushing pipe 4 on the first deblocking baffle ring 12 first convex When shoulder 11, first segment central tube 9 drives deblocking bushing pipe 4 to move up, while cutting the second deblocking shear pin 6, and deblocking bushing pipe 4 continues It moves up, after the second convex shoulder 14 touches the second deblocking baffle ring 13, the deblocking stopping of bushing pipe 4 is moved up;At this point, first segment center Between pipe 9 and second segment central tube 10 keep one deblocking away from, and hydro-expansive rubber 2 be opened one deblocking away from length, The narrowed thickness of hydro-expansive rubber 2, and then be released the pressure of bulge protrusion 17, the same level packer moves up, continue on After mentioning, second segment central tube 9 drives third section central tube 18 to realize that solution is sealed up and mentions second level packer and move up, it is final realize it is multistage Can desealed water-swelling packer mention on the whole, referring in particular to attached drawing 2 and attached drawing 3.

Embodiment 2, referring to attached drawing 5, the inward flange of the first convex shoulder 11 of the invention is equipped with the interior steel loop 16 of protrusion, for First deblocking 12 secure fit of baffle ring, the inward flange of second convex shoulder 14 are equipped with the interior steel loop 16 of protrusion, for solving with second 13 secure fit of block ring;The outer edge of above-mentioned the first deblocking baffle ring 12 and the second deblocking baffle ring 13 is respectively equipped with the outer of protrusion Steel loop 15, such structure can preferably guarantee to unseal the connection reliability of bushing pipe and second segment central tube, avoid falling off and make At deblocking failure;In addition, the structure of the convex shoulder of next stage and outer steel loop also using the above structure, repeats no more.

Embodiment 3 is filled with water-absorbing resin referring to attached drawing 8 in the cavity of first, second, third baffle ring of the invention, and The section of baffle ring is isosceles triangle, and two waists are equipped with the intercommunicating pore of bell shape, shape be it is wide outside and narrow inside, this structure is more Be conducive to absorb water, the water-absorbing resin slow release of inner cavity can also be made to play the role of local sustained release.When water swelling, due to gear The effect of water-absorbing resin in ring, hydro-expansive rubber 2 will form extrusion effect along the direction on two sides, further to squeeze Pressure, so that hydro-expansive rubber be made to form bulge protrusion 17 along the extending direction of two waists, which also may be implemented this hair Bright purpose enhances the leakproofness of hydro-expansive rubber, avoids the non-uniform bad problem of sealing for expanding and occurring.

The above, is only part preferred embodiment of the invention, and anyone skilled in the art may benefit Equivalent technical solution is modified or is revised as with the technical solution of above-mentioned elaboration.Therefore, technology according to the present invention Any simple modification or substitute equivalents that scheme is carried out, belong to the greatest extent the scope of protection of present invention.

Claims (7)

1. a kind of multistage can desealed water-swelling packer, it is characterized in that: include three sections of central tubes, one group of hydro-expansive rubber With two groups of deblocking devices, hydro-expansive rubber processing is in the outside of three sections of central tubes and two groups of deblocking devices, in first segment and the It is equipped with first group of deblocking device (a) between two sections of central tubes, second group is equipped between second segment central tube and third section central tube It unseals device (b);Wherein, every group of deblocking device includes the first baffle ring (3), deblocking bushing pipe (4), the first deblocking shear pin (5), second Shear pin (6) and the second baffle ring (7) are unsealed,
The middle part of deblocking bushing pipe (4) is fixed first segment central tube (9) by the first deblocking shear pin (5), passes through the second deblocking Shear pin (6) is fixed second segment central tube (10), fixes the first baffle ring (3) in the middle part outer wall of the first segment central tube (9), the The upper end of one section of central tube (9) is equipped with top connection (1), fixes the second baffle ring in the middle part outer wall of the second segment central tube (10) (7), the outer wall of third section central tube (18) is equipped with third baffle ring (19), and the lower end of the third section central tube (18), which is equipped with down, to be connect Head (8);
The first segment central tube (9), second segment central tube (10), third section central tube (18), first group of deblocking device (a) Hydro-expansive rubber (2) are machined with the outer wall of second group of deblocking device (b).
2. multistage according to claim 1 can desealed water-swelling packer, it is characterized in that: the first segment center The lower end for managing (9) is equipped with the first deblocking baffle ring (12), is respectively equipped with the first convex shoulder on the inside of the both ends of the deblocking bushing pipe (4) (11) it is equipped with the second deblocking baffle ring (13), is unsealed bushing pipe (4) with the second convex shoulder (14), the upper end of the second segment central tube (10) The first convex shoulder (11) and the second convex shoulder (14) unsealed in baffle ring (12) and second segment with the first of first segment central tube (9) respectively Second deblocking baffle ring (13) cooperation of heart pipe (10).
3. multistage according to claim 2 can desealed water-swelling packer, it is characterized in that: first convex shoulder (11) inward flange is equipped with the interior steel loop (16) of protrusion, for unsealing baffle ring (12) secure fit, second convex shoulder with first (14) inward flange is equipped with the interior steel loop (16) of protrusion, for unsealing baffle ring (13) secure fit with second.
4. multistage according to claim 2 can desealed water-swelling packer, it is characterized in that: the described first solution block Ring (12) and the outer edge of the second deblocking baffle ring (13) are respectively equipped with the outer steel loop (15) of protrusion.
5. multistage according to claim 1 can desealed water-swelling packer, it is characterized in that: first baffle ring (3) and the second baffle ring (7) be section is isosceles trapezoidal structure, the bottom of the first baffle ring (3) and the outer wall of first segment central tube (9) It is fixedly connected, the bottom of the second baffle ring (7) is fixedly connected with the outer wall of second segment central tube (10), and first baffle ring (3) Inner cavity with the second baffle ring (7) is hollow structure.
6. multistage according to claim 5 can desealed water-swelling packer, it is characterized in that: first baffle ring (3) and two waists of the second baffle ring (7) are equipped with intercommunicating pore (7.1), fill out in the inner cavity of the first baffle ring (3) and the second baffle ring (7) Filled with water-absorbing resin, water-absorbing resin is connected to hydro-expansive rubber (2), hydro-expansive rubber (2) is formed after water-swellable Bulge protrusion (17).
7. multistage according to claim 5 can desealed water-swelling packer, it is characterized in that: the deblocking bushing pipe (4) one third of the length less than the length of run between the first baffle ring (3) and the second baffle ring (7).
CN201711205975.8A 2017-11-27 2017-11-27 A kind of multistage can desealed water-swelling packer and method CN107989568B (en)

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RU2009113625A (en) * 2006-09-11 2010-10-20 Хэллибертон Энерджи Сервисиз, Инк. (Us) Swelling packer design
CN202176305U (en) * 2011-04-29 2012-03-28 中国石油化工股份有限公司 Self-expandable packer with protrusion-resisting protective device
CN202273637U (en) * 2011-10-29 2012-06-13 中国石油集团西部钻探工程有限公司 Overlapping type oil swelling packer
CN202381031U (en) * 2011-12-28 2012-08-15 中国石油天然气股份有限公司 Packer of horizontal well
CN202544801U (en) * 2012-01-04 2012-11-21 中国石油化工股份有限公司 Assembled fluid-swelling packer
CN203570259U (en) * 2013-08-16 2014-04-30 深圳市百勤石油技术有限公司 Anchoring packer
CN204457580U (en) * 2014-12-12 2015-07-08 中国石油天然气股份有限公司 Combined type packer
CN204532229U (en) * 2015-01-20 2015-08-05 中国石油天然气股份有限公司 Meet water self-expanding external packer of pipe

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