CN109403910A - A kind of big orifice oil pipe multistage inflatable packer - Google Patents
A kind of big orifice oil pipe multistage inflatable packer Download PDFInfo
- Publication number
- CN109403910A CN109403910A CN201811581468.9A CN201811581468A CN109403910A CN 109403910 A CN109403910 A CN 109403910A CN 201811581468 A CN201811581468 A CN 201811581468A CN 109403910 A CN109403910 A CN 109403910A
- Authority
- CN
- China
- Prior art keywords
- packer
- packing element
- pipeline road
- ontology
- swelling gasbag
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B33/00—Sealing or packing boreholes or wells
- E21B33/10—Sealing or packing boreholes or wells in the borehole
- E21B33/12—Packers; Plugs
- E21B33/122—Multiple string packers
Abstract
The present invention relates to oil exploration equipment technical fields, and disclose a kind of big orifice oil pipe multistage inflatable packer, including packer ontology, the both ends of packer ontology are respectively equipped with lower contact and top connection, the inside of packer ontology is fixedly installed with central tube, the outer surface of the central tube is equipped with swelling gasbag, and the outer surface of the swelling gasbag is equipped with annular packing element, and the inside of the packer ontology offers pipeline road.Pass through the setting of swelling gasbag and annular packing element, annular packing element is fixedly mounted on to the outer surface of swelling gasbag, the expansion of annular packing element entirety is driven to strut using the expansion of swelling gasbag, compared with existing inflatable packer, the both ends of packing element are pushed down without using rubber tube seat, so that packing element is not in the phenomenon that stress is concentrated in distending, while shoulder effect will not occur, and lead to packing element tearing, breakage, there is the problem of seal failure.
Description
Technical field
The present invention relates to oil exploration equipment technical field, specially a kind of big orifice oil pipe multistage inflatable packer.
Background technique
Packer is one of petroleum production engineering elastic sealing elements, empty for insulating the annular between tubing string and wellbore
Between, the device of isolation payzone, be broadly divided into self-sealing, compression and expanding etc., and inflatable packer is then mainly used for
The construction technologies such as seperated layer water injection, separate layer acid treatment, the separate stratum fracfturing in oil field, mainly combined by central tube, rubber tube seat and packing element and
At, the annular space of central tube and packing element is entered by pressurized hydraulic oil in oil pipe, swell packing element, and then Seal Oil collar-shaped
Space.
Although and existing inflatable packer for wellbore it is adaptable, setting it is reliable, be easy expansion and contraction and
The characteristics of without mechanical movement, but its requirement during going into the well for speed is harsh, and excessive velocities easily lead to tubing string
Interior fluid pressure increases suddenly, forms pressure difference, and then causes inflatable packer in setting, damage packing element halfway, causes
Technique failure, and in lift pipe string, it needs continuously to fill pressure to guarantee that the pressure inside and outside tubing and casing is consistent, prevents packing element in fluid column
Automatic distending under pressure difference, causes to aspirate, and can also destroy packing element；The packing element on existing inflatable packer is deformation occurs simultaneously
When, biggish deformation can occur in the region of the shoulder very little at both ends, so that the phenomenon that stress is concentrated is generated, especially at this
When packer needs repeatedly pressurization, pressure release, plastic deformation will gradually add up, and then increase the shoulder effect of packing element, finally
Lead to packing element tearing, damaged, the problem of seal failure.
Summary of the invention
(1) the technical issues of solving
The present invention provides a kind of big orifice oil pipe multistage inflatable packers, have automatic-sealed packing element, will not transfer
And occur the phenomenon that packing element automatic distending during above mentioning, the deformation of packing element uniformly will not there is a phenomenon where stress to concentrate, makes
With often and the advantages of long service life, solves existing inflatable packer and speed is wanted during going into the well
Ask harsh, excessive velocities easily cause the fluid pressure in tubing string to increase suddenly, form pressure difference, and then expanding is caused to insulate
Device causes technique to fail, and in lift pipe string in setting, damage packing element halfway, needs continuously to fill pressure to guarantee in tubing and casing
Outer pressure is consistent, prevents packing element automatic distending under fluid column pressure difference, causes to aspirate, can also destroy packing element；Existing expansion simultaneously
In the region of the shoulder very little at both ends biggish deformation can occur for the packing element on formula packer, to produce when deformation occurs
The phenomenon that raw stress is concentrated, especially when the packer needs repeatedly pressurization, pressure release, plastic deformation will gradually add up, into
And the shoulder effect of packing element is increased, packing element tearing, damaged is eventually led to, the problem of seal failure.
(2) technical solution
The invention provides the following technical scheme: a kind of big orifice oil pipe multistage inflatable packer, including packer ontology,
The both ends of the packer ontology are respectively equipped with lower contact and top connection, and the inside of the packer ontology is fixedly installed with center
Pipe, the outer surface of the central tube are equipped with swelling gasbag, and the outer surface of the swelling gasbag is equipped with annular packing element, the packer
The inside of ontology offers pipeline road, and one end of the pipeline road is connected to the inside of swelling gasbag, and pipeline road
The other end is connected to the inside of central tube, and the inside of the packer ontology offers U-shaped oil transportation circuit, and U-shaped oil transportation circuit
Positioned at the top of pipeline road, the both ends in the U-shaped oil transportation circuit are connected to the inside of pipeline road respectively, the packer sheet
The inside of the body and bottom end for being located at pipeline road offers drain line, the both ends of the drain line respectively with pipeline road
Inside be connected to the inside of central tube, the inside of the pipeline road and positioned at the lower section in U-shaped oil transportation circuit equipped with movable sealing
Plug, the outer surface of the movable sealing plug are contacted with the inner wall of pipeline road, and the inside of the movable sealing plug offers two groups
Oil-through-hole, and one end pin joint with two connecting rods, the other end of two connecting rods divide respectively at the both ends of movable sealing plug
Not with the middle part pin joint of two level pressure piece sides, and two level pressure pieces are fixedly connected with the inner wall of pipeline road.
Preferably, the outer diameter of the annular packing element is identical as the outer diameter size of packer ontology, and annular packing element outer wall
Surface roughness is set as Ra25.
Preferably, the two groups of oil-through-hole distributions in a center of symmetry of the movable sealing beyond the Great Wall.
Preferably, the shape of the level pressure piece is set as arcuate structure, and the elastic strength of left side level pressure piece is fixed less than right side
The elastic strength of tabletting.
Preferably, the length of the movable sealing plug is less than the gap between the both ends of U-shaped oil transportation circuit, and U-shaped oil transportation is returned
The one end on road and the installation site of movable sealing plug are staggered, and the installation of the other end in U-shaped oil transportation circuit and movable sealing plug
Position coincides.
(3) beneficial effect
The present invention have it is following the utility model has the advantages that
1, the big orifice oil pipe multistage inflatable packer, passes through U-shaped oil transportation circuit, drain line and movable sealing plug
Setting, while using oil-through-hole, connecting rod and level pressure piece, the working method of movable sealing plug can be divided into three states, i.e.,
It is setting, keep setting and deblocking, thus hydraulic inside stable control swelling gasbag, with existing inflatable packer phase
Than, in its decentralization and during above mention, will not due to the relationship of hydraulic pressure difference automatic distending annular packing element, and then lead to ring
The case where friction damage occurs for shape packing element and bore hole inside wall, and hierarchical process failure, annular packing element is caused to damage, uses effect
Fruit is good, stability is high, and may be reused repeatedly.
2, big orifice oil pipe multistage inflatable packer, by the setting of swelling gasbag and annular packing element, by annular glue
Cylinder is fixedly mounted on the outer surface of swelling gasbag, drives the expansion of annular packing element entirety to strut using the expansion of swelling gasbag,
Compared with existing inflatable packer, the both ends of packing element are pushed down without using rubber tube seat so that packing element in distending not
It will appear the phenomenon that stress is concentrated, while shoulder effect will not occur, and lead to packing element tearing, breakage, seal failure occur
Problem.
Detailed description of the invention
Fig. 1 is schematic structural view of the invention；
Fig. 2 is the cross-sectional view at structure of the invention A-A；
Fig. 3 is the connection schematic diagram of structure of the invention pipeline road, U-shaped oil transportation circuit and drain line；
Fig. 4 is that structure of the invention pipeline road and movable sealing fork clip connect schematic diagram；
Fig. 5 is the side view of structure of the invention level pressure piece.
In figure: 1, packer ontology；2, lower contact；3, top connection；4, central tube；5, swelling gasbag；6, annular packing element；7,
Pipeline road；8, U-shaped oil transportation circuit；9, drain line；10, movable sealing plug；11, oil-through-hole；12, connecting rod；13, level pressure
Piece.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
Please refer to Fig. 1-5, a kind of big orifice oil pipe multistage inflatable packer, including packer ontology 1, packer ontology
1 both ends are respectively equipped with lower contact 2 and top connection 3, and the inside of packer ontology 1 is fixedly installed with central tube 4, central tube 4
Outer surface is equipped with swelling gasbag 5, and the outer surface of swelling gasbag 5 is equipped with annular packing element 6, and the inside of packer ontology 1 offers defeated
One end of oil pipe line 7, pipeline road 7 is connected to the inside of swelling gasbag 5, and the other end of pipeline road 7 and central tube 4 is interior
Portion's connection, the inside of packer ontology 1 offers U-shaped oil transportation circuit 8, and U-shaped oil transportation circuit 8 is located at the top of pipeline road 7,
The both ends in U-shaped oil transportation circuit 8 are connected to the inside of pipeline road 7 respectively, the inside of packer ontology 1 and be located at pipeline road 7
Bottom end offer drain line 9, the both ends of drain line 9 connect with the inside of pipeline road 7 and the inside of central tube 4 respectively
It is logical, the inside of the pipeline road 7 and lower section for being located at U-shaped oil transportation circuit 8 is equipped with movable sealing plug 10, the appearance of movable sealing plug 10
Face is contacted with the inner wall of pipeline road 7, and the inside of movable sealing plug 10 offers two groups of oil-through-holes 11, and movable sealing plug 10
Both ends one end pin joint with two connecting rods 12 respectively, the other end of two connecting rods 12 respectively with two 13 sides of level pressure piece
Middle part pin joint, and two level pressure pieces 13 are fixedly connected with the inner wall of pipeline road 7.
In the technical program, the outer diameter of annular packing element 6 and the outer diameter size of packer ontology 1 are identical, and outside annular packing element 6
The surface roughness of wall is set as Ra25, the setting for annular 6 outer diameter of packing element, it is ensured that the mistake that annular packing element 6 is mentioned in decentralization and above
Cheng Zhong, will not between wellbore there is a phenomenon where friction, card plug, simultaneously for the setting of annular 6 surface roughness of packing element, effectively
Increase annular packing element 6 when expansion struts, for the frictional force between wellbore, and then ensure that the inflatable packer is using
During, it will not there is a situation where relative displacements.
In the technical program, the distribution in a center of symmetry of two groups of oil-through-holes 11 on movable sealing plug 10, for movable sealing
The setting of two groups of 11 central symmetries of oil-through-hole distribution on plug 10 can be with so that movable sealing plug 10 is during moving left and right
Effectively open different accesses, so that it is guaranteed that under different conditions 5 internal hydraulic pressure oil of swelling gasbag can effectively flow out or
It flows into, and then ensure that stability of the swelling gasbag 5 under different working conditions.
In the technical program, the shape of level pressure piece 13 is set as arcuate structure, and the elastic strength of left side level pressure piece 13 is less than
The elastic strength of right side level pressure piece 13, the setting for elastic strength between two level pressure pieces 13 can be according to hydraulic effective
The situation of movement of movable sealing plug 10 is controlled, and then controls the pressure inside swelling gasbag 5, further improves expanding envelope
Every the stability and reliability of device in use.
In the technical program, the length of movable sealing plug 10 is less than the gap between U-shaped 8 both ends of oil transportation circuit, and U-shaped defeated
One end of oil return line 8 and the installation site of movable sealing plug 10 are staggered, and the other end and movable sealing in U-shaped oil transportation circuit 8
The installation site of plug 10 coincides, the restriction for the length and installation site of movable sealing plug 10, so that movable sealing plug 10
It can flexibly opening and closing oil circuit, and then the effective pressure controlled inside swelling gasbag 5 by displacement.
The application method and working principle of the present embodiment:
Firstly, by the inflatable packer and its supporting tool etc., being transferred together with tubing string to wellbore according to process requirement
In suitable depth, begin to apply into tubing string later it is hydraulic,
It is setting: when the hydraulic elastic strength greater than left side level pressure piece 13 in central tube, just to will push movable sealing plug
10 move to the right, so that the radian opening direction of two level pressure pieces 13 is all to the left, 10 upper left side of movable sealing plug later
Oil-through-hole 11 will be connected to U-shaped oil transportation circuit 8, so that the liquid stream inside central tube 4 is through pipeline road 7, oil-through-hole 11 and U-shaped
Oil transportation circuit 8 is flowed into swelling gasbag 5, while liquid stream can apply pressure to swelling gasbag 5 always, so that swelling gasbag 5 is sent out
Raw expansion, and the swelling gasbag 5 expanded then will drive annular packing element 6 and expand together and struts, and squeezes and contacts with the inner wall of wellbore, directly
Pressure inside to swelling gasbag 5 reaches the state to balance each other with the pressure of design；
Keep setting: the pressure inside pressure and central tube 4 inside swelling gasbag 5 reaches the pressure and balance of design
Later, it removes additional hydraulic, and since the pressure inside central tube 4 suddenly disappears, will lead to the pressure inside swelling gasbag 5
Compressive activities sealing-plug 10 moves to the left, so as to cause left side level pressure piece 13 radian opening direction to the right, and right side level pressure
The radian opening direction of piece 13 to the left, is finally balanced with the hydraulic holding inside swelling gasbag 5, simultaneously as movable sealing plug 10
One section is moved to the left, so that the position of the oil-through-hole 11 of the one end in U-shaped oil transportation circuit 8 and 10 upper left side of movable sealing plug
It sets and is staggered, the liquid inside swelling gasbag 5 is caused not flow back, so as to be always maintained at the pressure of annular packing element 6
Size；
Deblocking: to hydraulic oil is constantly extracted in tubing string, so as to cause the negative pressure between 5 inside of central tube 4 and swelling gasbag
Difference increases, and causes to cannot keep the balance between swelling gasbag 5 and central tube 4 between two groups of level pressure pieces 13, and drive activity is close
The continuation of blocking 10 is moved to the left, so that the radian opening direction of two sides level pressure piece 13 is simultaneously to the right, while movable sealing plug 10
The oil-through-hole 11 on upper right side can be connected to by drain line 9 with the inside of central tube 4, then add negative pressure and swelling gasbag 5 outside
Elastic recovery under, by 5 inner cavity of swelling gasbag hydraulic oil be discharged, cause annular packing element 6 lose expansion extruding force and restore
Original state, when the hydraulic oil in swelling gasbag 5 is all discharged, and the pressure between 4 inside of central tube keeps balance again, by
It is less than the elastic strength of right side level pressure piece 13 in the elastic strength of left side level pressure piece 13, the level pressure piece 13 on right side is caused to will drive work
Dynamic sealing plug 10 moves to the right, so that oil-through-hole 11 and the drain line 9 on right side are staggeredly located out on movable sealing plug 10,
Make the radian opening direction of left side level pressure piece 13 simultaneously to the right, and the radian opening direction of right side level pressure piece 13 is to the left, so that
Swelling gasbag 5 is again at the state of sealing；
The inflatable packer is above proposed into withdrawal again later, completes one-time process process.
It should be noted that, in this document, relational terms such as first and second and the like are used merely to a reality
Body or operation are distinguished with another entity or operation, are deposited without necessarily requiring or implying between these entities or operation
In any actual relationship or order or sequence.Moreover, the terms "include", "comprise" or its any other variant are intended to
Non-exclusive inclusion, so that the process, method, article or equipment including a series of elements is not only wanted including those
Element, but also including other elements that are not explicitly listed, or further include for this process, method, article or equipment
Intrinsic element.
It although an embodiment of the present invention has been shown and described, for the ordinary skill in the art, can be with
A variety of variations, modification, replacement can be carried out to these embodiments without departing from the principles and spirit of the present invention by understanding
And modification, the scope of the present invention is defined by the appended.
Claims (5)
1. a kind of big orifice oil pipe multistage inflatable packer, including packer ontology (1), it is characterised in that: the packer
The both ends of ontology (1) are respectively equipped with lower contact (2) and top connection (3), during the inside of the packer ontology (1) is fixedly installed with
The outer surface of heart pipe (4), the central tube (4) is equipped with swelling gasbag (5), and the outer surface of the swelling gasbag (5) is equipped with annular
The inside of packing element (6), the packer ontology (1) offers pipeline road (7), one end of the pipeline road (7) and expansion
The inside of air bag (5) is connected to, and the other end of pipeline road (7) is connected to the inside of central tube (4), the packer ontology
(1) inside offers U-shaped oil transportation circuit (8), and U-shaped oil transportation circuit (8) is located at the top of pipeline road (7), described U-shaped defeated
The both ends of oil return line (8) are connected to the inside of pipeline road (7) respectively, the inside of the packer ontology (1) and be located at oil transportation
The bottom end of pipeline (7) offers drain line (9), the both ends of the drain line (9) respectively with the inside of pipeline road (7) and
It is close that the inside connection of central tube (4), the inside of the pipeline road (7) and the lower section for being located at U-shaped oil transportation circuit (8) are equipped with activity
The outer surface of blocking (10), the movable sealing plug (10) is contacted with the inner wall of pipeline road (7), the movable sealing plug (10)
Inside offer two groups of oil-through-holes (11), and the both ends of movable sealing plug (10) are sold with one end of two connecting rods (12) respectively
It connects, the other end of two connecting rods (12) the middle part pin joint with two level pressure piece (13) sides, and two level pressure pieces respectively
(13) it is fixedly connected with the inner wall of pipeline road (7).
2. a kind of big orifice oil pipe multistage inflatable packer according to claim 1, it is characterised in that: the annular glue
The outer diameter of cylinder (6) is identical as the outer diameter size of packer ontology (1), and the surface roughness of annular packing element (6) outer wall is set as
Ra25。
3. a kind of big orifice oil pipe multistage inflatable packer according to claim 1, it is characterised in that: the activity is close
Two groups of oil-through-hole (11) distributions in a center of symmetry on blocking (10).
4. a kind of big orifice oil pipe multistage inflatable packer according to claim 1, it is characterised in that: the level pressure piece
(13) shape is set as arcuate structure, and the elastic strength of left side level pressure piece (13) is less than the elasticity of right side level pressure piece (13) by force
Degree.
5. a kind of big orifice oil pipe multistage inflatable packer according to claim 1, it is characterised in that: the activity is close
The length of blocking (10) is less than the gap between U-shaped oil transportation circuit (8) both ends, and the one end in U-shaped oil transportation circuit (8) and activity are close
The installation site of blocking (10) is staggered, and the installation site phase of the other end in U-shaped oil transportation circuit (8) and movable sealing plug (10)
It is overlapped.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811581468.9A CN109403910B (en) | 2018-12-24 | 2018-12-24 | A kind of big orifice oil pipe multistage inflatable packer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811581468.9A CN109403910B (en) | 2018-12-24 | 2018-12-24 | A kind of big orifice oil pipe multistage inflatable packer |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109403910A true CN109403910A (en) | 2019-03-01 |
| CN109403910B CN109403910B (en) | 2019-09-10 |
Family
ID=65460717
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811581468.9A Active CN109403910B (en) | 2018-12-24 | 2018-12-24 | A kind of big orifice oil pipe multistage inflatable packer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109403910B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109973043A (en) * | 2019-05-14 | 2019-07-05 | 淮安市井神钻采机具有限公司 | A kind of multilayer company note water injection packer with step-by-step deblocking |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104481448A (en) * | 2014-12-05 | 2015-04-01 | 诺斯石油工具(天津)有限公司 | Combined hydraulic swelling packer and using method thereof |
| CN205025420U (en) * | 2015-09-29 | 2016-02-10 | 中国石油天然气股份有限公司 | Combination effect layering vapour drives packer |
| CZ2015419A3 (en) * | 2015-06-23 | 2016-12-14 | Watrad, Spol. S R.O. | Hydraulic packer |
| CN108915631A (en) * | 2018-07-27 | 2018-11-30 | 四机赛瓦石油钻采设备有限公司 | A kind of double packing element open hole packers of combined type |
-
2018
- 2018-12-24 CN CN201811581468.9A patent/CN109403910B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104481448A (en) * | 2014-12-05 | 2015-04-01 | 诺斯石油工具(天津)有限公司 | Combined hydraulic swelling packer and using method thereof |
| CZ2015419A3 (en) * | 2015-06-23 | 2016-12-14 | Watrad, Spol. S R.O. | Hydraulic packer |
| CN205025420U (en) * | 2015-09-29 | 2016-02-10 | 中国石油天然气股份有限公司 | Combination effect layering vapour drives packer |
| CN108915631A (en) * | 2018-07-27 | 2018-11-30 | 四机赛瓦石油钻采设备有限公司 | A kind of double packing element open hole packers of combined type |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109973043A (en) * | 2019-05-14 | 2019-07-05 | 淮安市井神钻采机具有限公司 | A kind of multilayer company note water injection packer with step-by-step deblocking |
Also Published As
| Publication number | Publication date |
|---|---|
| CN109403910B (en) | 2019-09-10 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102071900B (en) | Custom-pressure expandable naked eye packer | |
| CN201354617Y (en) | Self-expanding packer | |
| CN201883994U (en) | Self-pressure-retaining expansion open hole packer | |
| CN103184850A (en) | Bidirectional seat seal hook-wall packer, preparation method thereof and shaft circumferential packing method | |
| CN202165047U (en) | Expanding type open hole packer for horizontal wells | |
| CN109403910B (en) | A kind of big orifice oil pipe multistage inflatable packer | |
| CN102071901A (en) | Horizontal well high-pressure resistant packer for reservoir transformation | |
| CN104563954B (en) | Steel pipe recovers expansion type external pipe packer | |
| CN109139099B (en) | Filling, sand prevention and steam injection integrated device and operation method thereof | |
| CN110469290A (en) | Leakproof two-stage water injection packer | |
| CN206071555U (en) | Injection and extraction system | |
| CN104389548A (en) | High temperature and high pressure resistance tubing packer | |
| CN204113206U (en) | A kind of Self-expandable packer with compression protection mechanism | |
| CN2903353Y (en) | Washing well packer | |
| CN202706984U (en) | Insertion pipe bridge plug of fast change layer | |
| CN102937008A (en) | Top multistage pressure-bearing expansion pipe expansion construction device | |
| CN203499628U (en) | Well washing type step-by-step deblocking expandable long rubber sleeve packer | |
| CN201723196U (en) | Self-sealing setting ball seat | |
| CN201843570U (en) | Bidirectional bearing packer | |
| CN201738866U (en) | Anti-pollution well-cleaning packer | |
| CN211819316U (en) | Horizontal well constant-pressure anchoring forced deblocking dragging fracturing packer | |
| CN201460802U (en) | Insertion pipe packer | |
| CN104314510B (en) | Self-expanding packer with compression protection mechanism | |
| CN208203211U (en) | A kind of leakproof two-stage water injection packer | |
| CN202937212U (en) | Top multistage pressure bearing type expandable construction device for expandable pipes |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |