CN109252827A - A kind of anti-receding device and the packer comprising it - Google Patents
A kind of anti-receding device and the packer comprising it Download PDFInfo
- Publication number
- CN109252827A CN109252827A CN201710575031.3A CN201710575031A CN109252827A CN 109252827 A CN109252827 A CN 109252827A CN 201710575031 A CN201710575031 A CN 201710575031A CN 109252827 A CN109252827 A CN 109252827A
- Authority
- CN
- China
- Prior art keywords
- mandrel
- wall
- cylinder sleeve
- cylinder
- receding device
- 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
- 238000012856 packing Methods 0.000 claims description 27
- 238000007789 sealing Methods 0.000 claims description 10
- 230000000712 assembly Effects 0.000 claims description 8
- 238000000429 assembly Methods 0.000 claims description 8
- 230000005540 biological transmission Effects 0.000 claims description 8
- 230000015572 biosynthetic process Effects 0.000 claims 1
- 238000000034 method Methods 0.000 description 5
- 230000009471 action Effects 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 230000008859 change Effects 0.000 description 2
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 239000002360 explosive Substances 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000007246 mechanism Effects 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 239000004519 grease Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000001050 lubricating effect Effects 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK 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
- E21B33/129—Packers; Plugs with mechanical slips for hooking into the casing
- E21B33/1293—Packers; Plugs with mechanical slips for hooking into the casing with means for anchoring against downward and upward movement
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK 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
- E21B33/127—Packers; Plugs with inflatable sleeve
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Actuator (AREA)
- Fluid-Damping Devices (AREA)
Abstract
The invention proposes a kind of anti-receding device and comprising its packer, which includes mandrel, and mounting hole is arranged on the outer wall of the mandrel；Clip assembly in the mounting hole is set, and the clip assembly has the elastic component abutted with the mounting hole and the cylinder abutted with the elastic component；The outside for being socketed in the mandrel can be provided with the clamping groove that can cooperate with the cylinder relative to the cylinder sleeve of mandrel movement on the inner wall of the cylinder sleeve, which can provide biggish anti-back power.
Description
Technical field
The present invention relates to oil/gas well downhole tool technical fields, and in particular to a kind of anti-receding device and the packing comprising it
Device.
Background technique
Packer is that oil field produces one of common downhole tool.It passes through mechanically or hydraulically mechanism urges cylinder sleeve compression envelope
Every device packing element, so that packing element is radial after being compressed axially to generate expansion, to realize the mesh of annular space between packing packer and casing
's.
However, once axial load disappears, packing element restores deformation or packing element upper pressure pushes glue after packing element expansion
Cylinder is mobile, and packer packing is deteriorated every effect, or even loses sealing effect.It thus needs that retreating prevention mechanism is arranged on packer, with
Guarantee packer sets safety.
Summary of the invention
For some or all of of the above-mentioned technical problem in the presence of the prior art, the invention proposes a kind of anti-backs
Device and packer comprising it.The anti-receding device anti-back effect is good, and processes easy to assembly.
According to an aspect of the invention, it is proposed that a kind of anti-receding device, comprising:
Mounting hole is arranged on the outer wall of mandrel in mandrel,
Clip assembly in mounting hole is set, and clip assembly has the elastic component abutted with mounting hole and supports with elastic component
The cylinder connect,
The outside for being socketed in mandrel can be relative to the cylinder sleeve of mandrel movement, and being provided on the inner wall of cylinder sleeve can match with cylinder
The clamping groove of conjunction.
In one embodiment, the section of clamping groove is trapezoidal, and the waist for being located at first end radially extends, and is located at the
The waist at two ends is extended on direction from outside to inside from first end to the second extreme direction tilting.
In one embodiment, for trapezoidal clamping groove section second end waist extending direction and axial direction between shape
At angle be 40-50 degree.
In one embodiment, in axial direction, compartment is arranged multiple clip assemblies on the outer wall of mandrel, also, from
In first end to the direction of second end, the effective diameter of cylinder is gradually become smaller.
In one embodiment, in circumferential direction, multiple clip assemblies on same circumference are set on the outer wall of mandrel
To form clip assembly group, the cylinder for the clip assembly group adjacent to each other in multiple clip assembly groups that axis is set up does not exist
On same axis, and the clamping groove of multiple axially spaced-aparts is set on the inner wall of cylinder sleeve.
In one embodiment, fillet surface is set between the first end face of cylinder sleeve and the inner wall of cylinder sleeve.
In one embodiment, it is 55-65 degree that the extending direction of fillet surface and axial direction, which are formed by angle,.
In one embodiment, on the outer wall of mandrel setting so that the first segment outer diameter in first end is less than in the
The big step surface of the second segment outer diameter at two ends, and piston bush is arranged on the first segment of mandrel, piston bush is across step towards
Two extreme directions extend the sap cavity for being socketed on the outer wall of cylinder sleeve and forming sealing with mandrel, and sap cavity is located on second segment with setting
The pressure transmission hole of the inside and outside connection of first end side of mounting hole is connected to.
In one embodiment, between the mandrel and cylinder sleeve between pressure transmission hole and mounting hole, in piston bush and mandrel
Between first segment, and between the inner sidewall of piston bush and the outer wall of cylinder sleeve sealing ring is respectively set.
According to another aspect of the invention, it is proposed that a kind of packer, including above-mentioned anti-receding device and is arranged in mandrel
Packing element component on the first segment of first end, the second end of packing element component are abutted with piston bush.
Compared with the prior art, the advantages of the present invention are as follows can lock core by the cooperation of clip assembly and clamping groove
The relative position of axis and set cylinder, to prevent the packing element of packer from retracting.Simultaneously as the anti-receding device be clip assembly and
The fit form of clamping groove helps to provide biggish anti-back power.Also, the anti-receding device requirement on machining accuracy is low, processing and
Assembling is easy, and production cost is not high.
Detailed description of the invention
The preferred embodiment of the present invention is described in detail below in conjunction with attached drawing, in figure:
Fig. 1 shows the explosive view of anti-receding device according to an embodiment of the invention；
Fig. 2 shows anti-receding device according to an embodiment of the invention；
Fig. 3 shows packer according to an embodiment of the invention；
Fig. 4 shows assembling schematic diagram according to an embodiment of the invention；
In the accompanying drawings, identical component uses identical appended drawing reference.The attached drawing is not drawn according to the actual ratio.
Specific embodiment
Below in conjunction with attached drawing, the present invention will be further described.
Fig. 1 shows the explosive view of anti-receding device 100 according to the present invention.As shown in Figure 1, the anti-receding device 100 includes
Mandrel 1, clip assembly 2 and cylinder sleeve 3.Mounting hole 11 is set on the outer wall of mandrel 1.Clip assembly 2 is arranged in mounting hole 11.
Clip assembly 2 has the elastic component 21 abutted with mounting hole 11 and the cylinder 22 abutted with elastic component 21.Cylinder sleeve 3 is socketed in mandrel
1 outside, and can be mobile relative to mandrel 1.Meanwhile clamping groove 31 is set on the inner wall of cylinder sleeve 3.So that in 3 phase of cylinder sleeve
For in 1 moving process of mandrel, the cylinder 22 of clip assembly 2 can cooperate with clamping groove 31, to limit cylinder sleeve 3 and mandrel 1
Positional relationship.
After the packing element component 51 of packer 50 is socketed on mandrel 1 as a result, when cylinder sleeve 3 is relative to 1 moving process of mandrel
In, the packing element 52 of packing element component 51 receives compression and is radially expanded.At this point, work of the cylinder 22 of clip assembly 2 in elastic component 21
Entered in clamping groove 31 with lower, to limit the positional relationship of cylinder sleeve 3 Yu mandrel 1, prevents cylinder sleeve 3 from retracting relative to mandrel 1.It should
Anti-receding device 100 using clip assembly 2 and clamping groove 31 fit form, by change clip assembly 2 cylinder 22 it is effective
Area of section and clamping groove 31 and the positional relationship of clip assembly 2 etc. can change anti-back power, so as to flexible modulation packing
The anti-back power of device 50.In addition, the component processings required precision such as the clamping groove 31 of the anti-receding device 100 and mounting hole 11 is low, assembling
It is easier, helps to reduce production cost.
In one embodiment, the section of clamping groove 31 is trapezoidal.The trapezoid cross section of clamping groove 31 is located at first end
Waist radially extends, it is, straight step is configured to herein, preferably to contact with cylinder 22, to play extraordinary
Anti-back effect.And the waist positioned at second end of the trapezoid cross section of clamping groove 31 on direction from outside to inside from first end to second
Extreme direction tilting extends.Preferably, the angle formed between the extending direction and axial direction of the waist of second end is 40-50 degree, example
For example 45 degree.Pass through above-mentioned setting, during cylinder sleeve 3 is mobile to the first extreme direction from second end relative to mandrel 1, cylinder
22 can be easily slid into clamping groove 31.
Preferably, the elastic component 21 of clip assembly 2 can be spring.In cylinder sleeve 3 relative to mandrel 1 from second end to first
During extreme direction is mobile, cylinder sleeve 3 forces in clip assembly 2 so that elastic component 21 is compressed, and cylinder 22 is to contract
Formula is mobile.And when clamping groove 31 and 2 position of clip assembly to it is corresponding when under the action of elastic component 21, cylinder 22 be displaced outwardly with
Cooperate with clamping groove 31, to play the role of preventing from retracting.
In a preferred embodiment, in axial direction, multiple clip assemblies 2 are arranged in compartment on the outer wall of mandrel 1.?
On direction from first end to second end, the effective diameter of cylinder 22 is gradually become smaller.In cylinder sleeve 3 relative to mandrel 1 from second end
During the movement of the first extreme direction, the compressing force that packing element 52 is subject to is increasing, then the rebound for the packing element 52 that cylinder sleeve 3 is subject to
Power also can be increasing.Cooperated by above-mentioned setting clamping groove 31 from the cylinder 22 with different effective diameters, and with cylinder
The increase of 22 effective diameter, anti-rollback locking ability also gradually increase.
According to the present invention, in circumferential direction, be arranged on the outer wall of mandrel 1 multiple clip assemblies 2 on the same circumference with
Form clip assembly group.And each clip assembly 2 in each clip assembly group is uniformly distributed, uniform anti-to be formed in the circumferential
Rollback power, to guarantee the uniformity and stability of the stress of packing element 52.And on axial, multiple clip assembly groups are set.That
The cylinder 22 of this adjacent clip assembly group is not on the same axis.It is, the cylinder 22 of clip assembly group adjacent to each other
Distribution mutually straggly.During cylinder sleeve 3 is mobile to the first extreme direction from second end relative to mandrel 1, same clamping groove 31 with
Adjacent different clip assemblies assemble conjunction, and each clip assembly 21 of clip assembly group different position and the clamping in the circumferential
Slot 31 contacts, if this set is avoided that cylinder 22 is located on same axis, and cylinder 22 is always in same position and clamping
The problem of clamping groove 31 caused by the contact of slot 31 is easy to appear abrasion.To which above-mentioned setting improves clamping groove 31 and clamping group
The safety of the cooperation of part 2.
Clip assembly 2 can be arranged at mounting hole 11 by way of being fixedly connected.But due to clip assembly 2
Weight is smaller, in an assembling process, can also be arranged at mounting hole 11 by lubricating grease etc..
In one embodiment, direction from outside to inside is set between the first end face of cylinder sleeve 3 and the inner wall of cylinder sleeve 3
On from first end to the second extreme direction fillet surface 32, as shown in Figure 4.Preferably, the extending direction of fillet surface 32 and axial institute shape
At angle be 55-65 degree, such as 60 degree.This set can make in cylinder sleeve 3 relative to mandrel 1 from second end to first end side
During movement, the first end face of cylinder sleeve 3 does not generate collision with cylinder 22, to guarantee the smooth of the installation of cylinder sleeve 3
It carries out.
Cylinder sleeve 3 is arranged on the outer wall of mandrel 1 by shear pin 6.Under the action of axial force, shear pin 6 can be with
It is cut, to release the fixed relationship of the cylinder sleeve 3 and mandrel 1 at shear pin 6, and enables cylinder sleeve 3 relative to 1 axis of mandrel
To movement.It is this to have the advantages of simple structure and easy realization.
In one embodiment, step surface 12 is set on the outer wall of mandrel 1, so that the mandrel 1 in first end
13 outer diameter of first segment is less than 14 outer diameter of second segment in second end.Piston bush 4 is arranged on the first segment 13 of mandrel 1.Piston
Set 4 extends across step surface 12 to the second extreme direction, and its second end is socketed on the outer wall of cylinder sleeve 3.Mandrel 1,4 and of piston bush
Cylinder sleeve 3 forms the sap cavity 5 of sealing on the outside of the first end of step surface 12 together.Meanwhile connecting inside and outside setting on the wall of mandrel 1
Logical pressure transmission hole 15.The pressure transmission hole 15 is located at the first end side of mounting hole 11, and is connected to sap cavity 5.Into the inner cavity of mandrel 1
When pumping pressure liquid, liquid is entered in sap cavity 5 by pressure transmission hole 15, under action of hydraulic force, the first quilt of shear pin 6
It cuts, then piston bush 4 and cylinder sleeve 3 are expanded relative to mandrel 1 to the mobile packing element 52 that urges of the first extreme direction.Meanwhile clamping group
Part 2 and the cooperation of clamping groove 31 are to prevent packing element 52 from retracting.
Preferably, in order to guarantee the leakproofness of sap cavity 5, which further includes sealing ring 7.For example, in pressure transmission hole
Between mandrel 1 between 15 and mounting hole 11 and cylinder sleeve 3, between piston bush 4 and the first segment 13 of mandrel 1, and in piston
Sealing ring 7 is respectively set between the inner sidewall of set 4 and the outer wall of cylinder sleeve 3.The sealing ring 7 plays the role of sealing sap cavity 5.
According to the present invention, packer 50 is further related to.As shown in figure 3, packer 50 includes above-mentioned anti-receding device 100 and sets
Set the packing element component 51 on the first segment 13 of the first end of mandrel 1.The second end of packing element component 51 and the first end of piston bush 4
Face abuts.To, during piston bush 4 and cylinder sleeve 3 mobile to the first extreme direction relative to mandrel 1, packing element component 51
Packing element 52 is compressed, and the clamping groove 31 of anti-receding device 100 is matched from different clip assemblies 2 at this time, to prevent in packing element 52
Under the action of, piston bush 4 retracts.
The above is only the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, any this field
Technical staff in technical scope disclosed by the invention, can be easy to carry out and be altered or varied, and this be altered or varied all
It is covered by the protection scope of the present invention.Therefore, protection scope of the present invention should be with the protection scope of claims
It is quasi-.
Claims (10)
1. a kind of anti-receding device for packer characterized by comprising
Mounting hole is arranged on the outer wall of the mandrel in mandrel,
Clip assembly in the mounting hole is set, the clip assembly have the elastic component abutted with the mounting hole and with
The cylinder that the elastic component abuts,
The outside for being socketed in the mandrel can be provided with energy on the inner wall of the cylinder sleeve relative to the cylinder sleeve of mandrel movement
With the clamping groove of cylinder cooperation.
2. anti-receding device according to claim 1, which is characterized in that the section of the clamping groove is trapezoidal, and is located at
The waist of first end radially extends, and the waist positioned at second end is tilted on direction from outside to inside from first end to the second extreme direction
Formula extends.
3. anti-receding device according to claim 2, which is characterized in that for the second end in the section of the trapezoidal clamping groove
Waist extending direction and axial direction between the angle of the formation be 40-50 degree.
4. according to claim 1 to anti-receding device described in any one of 3, which is characterized in that in axial direction, in the outer of the mandrel
Multiple clip assemblies are arranged in compartment on wall, also, on the direction from first end to second end, the cylinder it is effective
Diameter gradually becomes smaller.
5. anti-receding device according to any one of claims 1 to 4, which is characterized in that in circumferential direction, in the outer of the mandrel
Multiple clip assemblies on same circumference are set on wall to form clip assembly group, multiple clampings that axis is set up
The cylinder of the clip assembly group adjacent to each other in component group not on the same axis, and in the inner wall of the cylinder sleeve
The clamping groove of the upper multiple axially spaced-aparts of setting.
6. according to claim 1 to anti-receding device described in any one of 5, which is characterized in that in the first end face of the cylinder sleeve
Fillet surface is set between the inner wall of the cylinder sleeve.
7. anti-receding device according to claim 6, which is characterized in that the extending direction of the fillet surface is formed with axial
Angle be 55-65 degree.
8. according to claim 1 to anti-receding device described in any one of 7, which is characterized in that set on the outer wall of the mandrel
It sets so that the first segment outer diameter in first end is less than the step surface of the second segment outer diameter in second end, and in the mandrel
Piston bush is arranged on first segment, the piston bush, which extends across the step towards second end direction, is socketed in the outer of the cylinder sleeve
Form the sap cavity of sealing on wall and with the mandrel, the sap cavity be arranged on the second segment positioned at the of the mounting hole
The pressure transmission hole of the inside and outside connection of one end is connected to.
9. anti-receding device according to claim 8, which is characterized in that the institute between the pressure transmission hole and the mounting hole
It states between mandrel and the cylinder sleeve, between the piston bush and the first segment of the mandrel, and in the piston bush
Sealing ring is respectively set between side wall and the outer wall of the cylinder sleeve.
10. a kind of packer, which is characterized in that including according to claim 1 to anti-receding device and setting described in any one of 9
The second end of packing element component on the first segment of the first end of the mandrel, the packing element component is abutted with piston bush.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710575031.3A CN109252827B (en) | 2017-07-14 | 2017-07-14 | Anti-retreat device and packer comprising same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710575031.3A CN109252827B (en) | 2017-07-14 | 2017-07-14 | Anti-retreat device and packer comprising same |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109252827A true CN109252827A (en) | 2019-01-22 |
| CN109252827B CN109252827B (en) | 2020-12-04 |
Family
ID=65051811
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710575031.3A Active CN109252827B (en) | 2017-07-14 | 2017-07-14 | Anti-retreat device and packer comprising same |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109252827B (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3419079A (en) * | 1965-10-23 | 1968-12-31 | Schlumberger Technology Corp | Well tool with expansible anchor |
| CN202417417U (en) * | 2011-12-19 | 2012-09-05 | 中国石油集团长城钻探工程有限公司 | Tube external packer for well cementation of multilateral well |
| CN203716919U (en) * | 2013-12-31 | 2014-07-16 | 安东石油技术（集团）有限公司 | Open hole packer |
| CN204098848U (en) * | 2014-09-12 | 2015-01-14 | 能新科（西安）油气技术有限公司 | A kind of toe-end anchoring type bore hole external packer of pipe |
| CN104329047A (en) * | 2014-10-29 | 2015-02-04 | 东营市福利德石油科技开发有限责任公司 | Intelligent well top part packer |
| CN204283313U (en) * | 2014-10-29 | 2015-04-22 | 东营市福利德石油科技开发有限责任公司 | Smart well top packer |
| CN204920892U (en) * | 2015-09-08 | 2015-12-30 | 黄祖熹 | Stifled water packer under horizontal well pump |
-
2017
- 2017-07-14 CN CN201710575031.3A patent/CN109252827B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3419079A (en) * | 1965-10-23 | 1968-12-31 | Schlumberger Technology Corp | Well tool with expansible anchor |
| CN202417417U (en) * | 2011-12-19 | 2012-09-05 | 中国石油集团长城钻探工程有限公司 | Tube external packer for well cementation of multilateral well |
| CN203716919U (en) * | 2013-12-31 | 2014-07-16 | 安东石油技术（集团）有限公司 | Open hole packer |
| CN204098848U (en) * | 2014-09-12 | 2015-01-14 | 能新科（西安）油气技术有限公司 | A kind of toe-end anchoring type bore hole external packer of pipe |
| CN104329047A (en) * | 2014-10-29 | 2015-02-04 | 东营市福利德石油科技开发有限责任公司 | Intelligent well top part packer |
| CN204283313U (en) * | 2014-10-29 | 2015-04-22 | 东营市福利德石油科技开发有限责任公司 | Smart well top packer |
| CN204920892U (en) * | 2015-09-08 | 2015-12-30 | 黄祖熹 | Stifled water packer under horizontal well pump |
Also Published As
| Publication number | Publication date |
|---|---|
| CN109252827B (en) | 2020-12-04 |
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