CN206530312U - A kind of inflatable packer - Google Patents
A kind of inflatable packer Download PDFInfo
- Publication number
- CN206530312U CN206530312U CN201720219087.0U CN201720219087U CN206530312U CN 206530312 U CN206530312 U CN 206530312U CN 201720219087 U CN201720219087 U CN 201720219087U CN 206530312 U CN206530312 U CN 206530312U
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- central tube
- packing element
- steel skeleton
- expansion packing
- sheath
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Abstract
The utility model purpose is, a kind of inflatable packer can improve the sealing term of validity, and resistance to compression difference ability is high, can be repeated several times in underground it is setting use, not Ka Jing.Its operation principle, when not setting, expansion packing element is contraction state, when setting, oil pipe is suppressed, and liquid opens rectangular opening by central tube and enters expansion packing element inwall, expansion packing element diameter is set to become big, while the second steel skeleton drives back of the body cap to be slided on central tube, until setting complete.Liquid between packing element and central tube is expelled back into central tube by oil pipe pressure release during deblocking, expansion packing element under own resilience, removing seal for packer.The purpose for the rectangular opening being provided with central tube is to allow oil to pass through, and only allows a small amount of fracturing sand to pass through, when so expansion packing element is beneficial to the oily pressure release in central tube, the oil discharge between expansion packing element inwall and central tube.
Description
Technical field
The utility model belongs to petroleum-gas fiedl downhole tool manufacture field, more particularly to a kind of inflatable packer.
Background technology
Inflatable packer used is set with packing element on central tube both at home and abroad at present, and packing element upper and lower ends are each by a pressure ring
Withhold, back of the body cap is locked, and is provided with gap in the middle part of packing element between internal diameter and central tube external diameter, packing element two ends internal diameter and central tube external diameter are close
Coordinate, with sealing property, central tube is provided with setting passage with corresponding position in the middle part of packing element, and top connection endoporus is provided with connection box,
Lower contact external diameter is provided with connection pin thread.
Inflatable packer operation principle：With in oil pipe connection tripping in oil, gas well sleeve pipe when inflatable packer works, it is
Smooth tripping in and rise, maximum outside diameter when inflatable packer is not setting is both less than casing inner diameter.It is lowered into well and makes a reservation for
Behind position, into oil pipe, fluid injection is suppressed, and the setting passage on the stretched formula packer central tube of liquid enters central tube and packing element
Between gap, flexible packing element is expanded, diameter increase makes packing element external diameter be fitted tightly on internal surface of sleeve pipe, sleeve pipe
The annular space of internal diameter and packer external diameter is separated by packing element, and this is the setting rear purpose to be reached of inflatable packer.
, it is necessary to by removing seal for packer, then propose outside well after inflatable packer completes the estimated packing work period., will during deblocking
Oily overpressure is released, Inflatable type packer rubber sleeve resilience under natural resiliency effect, and liquid between packing element and central tube is flow back to
To center tube cavity, packing element diameter returns to setting preceding state, and this is deblocking.
There is problem in current inflatable packer：Common Inflatable type packer rubber sleeve is integrated with central tube vulcanization, liquid
Gap between central tube and packing element is entered by central tube side wall liquid pass hole, flexible packing element is expanded, actually makes
Often occur situations such as packing element tear is cracked, departed from vulcanization during, cause seal failure；Used in pressure break, fracturing sand
Central tube and packing element gap can be entered with liquid, fracturing sand is difficult discharge in deblocking, and packing element reclaims not thorough, or even does not understand
Envelope.It can be seen that current inflatable packer is the problem of presence：Easily tear is cracked, easily departed from vulcanization, in underground when packing element is expanded
Reuse number of times is few, there is card well risk.
Utility model content
The technical problems to be solved in the utility model：It is to overcome above deficiency there is provided a kind of inflatable packer, has
Anti- fracturing sand function, prevents excessive fracturing sand from entering between expansion packing element inwall and center pipe outer wall.Expand packing element not rapid wear
Bad, packer sealing term of validity length, the poor ability of resistance to compression are high, can be repeatedly used in underground, not Ka Jing.
Back of the body cap is up in the axial direction or move down with expansion packing element when expanding packing element expansion or shrinking.
The technical scheme of use
A kind of inflatable packer includes：Top connection, the first steel skeleton, the first sheath, expansion packing element, central tube, second
Sheath, the second steel skeleton, back of the body cap.It is characterized in that：
Packing element socket central tube is expanded, the vertical central plane of expansion packing element is overlapped with the octahedral of central tube.
The right output port of first steel skeleton is socketed central tube from the left end of central tube,
First groove cylinder of the first steel skeleton inserts the left port of expansion packing element.First groove cylinder of the first steel skeleton
Engaged with the expansion recess hole of packing element first.The right-hand member of first steel skeleton props up the fourth face of expansion packing element.The of first steel skeleton
Two faces prop up the left side of expansion packing element.
Second steel skeleton is identical with the first steel skeleton construction.
Second steel skeleton is socketed central tube from the right-hand member of central tube, and the first groove cylinder of the second steel skeleton inserts expansion glue
The right output port of cylinder.First groove cylinder of the second steel skeleton is engaged with the expansion recess hole of packing element second.Second steel skeleton first is recessed
The end face of groove cylinder side props up the 5th face of expansion packing element.The right side of second steel skeleton props up the 7th face of central tube.
First sheath is socketed the first steel skeleton, the left part of central tube and the left part for expanding packing element, the 3rd face of the first sheath
Prop up the left side of expansion packing element.
Second sheath is identical with the first jacket structure.
Second sheath is socketed the second steel skeleton, the right part of central tube and the right part for expanding packing element, the 3rd face of the second sheath
Prop up the right side of expansion packing element.
The right output port socket central tube and the left part of the first steel skeleton of top connection, the right-hand member of top connection prop up the first sheath
Left end, the first face of top connection props up the left end of the first steel skeleton.
The right output port socket central tube and the right part of the second steel skeleton of back of the body cap, the left side of back of the body cap props up the second sheath right-hand member
Face.
Multiple rectangular openings are provided with the tube wall for being symmetrical with the octahedral of central tube, wherein size H is 0.23 ~ 0.25mm.
Multiple grooves are provided with the outer cylinder of central tube, the quantity of groove is identical with the quantity of rectangular opening.Groove is in square
The column jacket surface side of the central tube in shape hole, the bottom surface of groove symmetrically includes the section of rectangular opening.
Advantage
For the inflatable packer of said function, the utility model has following two big advantages：
First, provided with sand-prevention structure：Prevent excessive fracturing sand from entering between expansion packing element inwall and center pipe outer wall.
2nd, provided with compensation mechanism：Expansion packing element is hardly damaged, and the sealing term of validity is long, reusable.
Brief description of the drawings
Fig. 1 is a kind of assembling schematic diagram of inflatable packer；
Fig. 2 is the station location marker figure of top connection；
Fig. 3 is the station location marker figure of the first steel skeleton；
Fig. 4 is the station location marker figure of the first sheath；
Fig. 5 is the station location marker figure of expansion packing element；
The station location marker figure of pipe centered on Fig. 6；
Fig. 7 is Fig. 1 compensation mechanism partial enlarged drawing C.
Embodiment
Embodiment 1
A kind of inflatable packer includes：Top connection 1, the first steel skeleton 2, the first sheath 3, expansion packing element 4, central tube 5,
Second sheath 6, the second steel skeleton 7, back of the body cap 8；It is characterized in that：
The socket central tube 5 of packing element 4 is expanded, the vertical central plane of expansion packing element 4 is overlapped with the octahedral 20 of central tube 5；
The right output port of first steel skeleton 2 is socketed central tube 5 from the left end of central tube 5,
First groove cylinder 10 of the first steel skeleton 2 inserts the left port of expansion packing element 4；The first of first steel skeleton 2 is recessed
Groove cylinder 10 is engaged with the expansion recess hole 14 of packing element 4 first；The right-hand member of first steel skeleton 2 props up the fourth face 13 of expansion packing element 4；
Second face 11 of the first steel skeleton 2 props up the left side of expansion packing element 4；
Second steel skeleton 7 is identical with the structure of the first steel skeleton 2；
Second steel skeleton 7 is socketed central tube 5 from the right-hand member of central tube 5, and the first groove cylinder 10 of the second steel skeleton 7 is inserted
Expand the right output port of packing element 4；First groove cylinder 10 of the second steel skeleton 7 is engaged with the expansion recess hole 15 of packing element 4 second；Second
The end face of the side of 7 first groove cylinder of steel skeleton 10 props up the 5th face 16 of expansion packing element 4；The right side of second steel skeleton 7 is propped up
7th face 19 of central tube 5；
First sheath 3 is socketed the first steel skeleton 2, the left part of central tube 5 and the left part for expanding packing element 4, the of the first sheath 3
Three faces 12 prop up the left side of expansion packing element 4；
Second sheath 6 is identical with the structure of the first sheath 3；
Second sheath 6 is socketed the second steel skeleton 7, the right part of central tube 5 and the right part for expanding packing element 4, the of the second sheath 6
Three faces 12 prop up the right side of expansion packing element 4；
The right output port of top connection 1 is socketed the left part of the steel skeleton 2 of central tube 5 and first, and the right-hand member of top connection 1 props up the first shield
The left end of set 3, the first face 9 of top connection 1 props up the left end of the first steel skeleton 2；
The right output port of back of the body cap 8 is socketed the right part of the steel skeleton 7 of central tube 5 and second, and the left side of back of the body cap 8 props up the second sheath
6 right sides；
It is provided with multiple rectangular openings 18 on the tube wall for being symmetrical with the octahedral 20 of central tube 5, wherein size H is 0.23 ~
0.25mm；
Multiple grooves 17 are provided with the outer cylinder of central tube 5, the quantity of groove 17 is identical with the quantity of rectangular opening 18；It is recessed
Groove 17 is in the column jacket surface side of the central tube 5 of rectangular opening 18, and the bottom surface of groove 17 symmetrically includes the section of rectangular opening 18.
Embodiment 2
A kind of embodiment 2 of inflatable packer is substantially the same manner as Example 1, it is characterised in that：
Multiple rectangular openings 18 on the tube wall of central tube 5, wherein size H are 0.23mm.
Embodiment 3
A kind of embodiment 3 of inflatable packer is substantially the same manner as Example 1, it is characterised in that：
Multiple rectangular openings 18 on the tube wall of central tube 5, wherein size H are 0.24mm.
Embodiment 4
A kind of embodiment 4 of inflatable packer is substantially the same manner as Example 1, it is characterised in that：
Multiple rectangular openings 18 on the tube wall of central tube 5, wherein size H are 0.25mm.
Operation principle
Suppressed in oil pipe, highly pressurised liquid enters the confined air of central tube and expansion packing element through the lateral rectangle hole path of central tube
Between, expansion packing element is constantly expanded under highly pressurised liquid impetus, while driving back of the body cap to be slided on central tube, until expansion glue
Cylinder external diameter is gradually increased to seal with casing wall.
During deblocking, oily overpressure is released, by central tube and expansion packing element annular space under packing element own resilience
Liquid is discharged, and expansion packing element, which can be unsealed, proposes tubing string outside well.
Claims (4)
1. a kind of inflatable packer, including：Top connection（1）, the first steel skeleton（2）, the first sheath（3）, expansion packing element（4）、
Central tube（5）, the second sheath（6）, the second steel skeleton（7）, back of the body cap（8）；It is characterized in that：
Expand packing element（4）It is socketed central tube（5）, expand packing element（4）Vertical central plane and central tube（5）Octahedral（20）Weight
Close；
First steel skeleton（2）Right output port from central tube（5）Left end socket central tube（5）,
First steel skeleton（2）The first groove cylinder（10）Insert expansion packing element（4）Left port；First steel skeleton（2）
One groove cylinder（10）With expansion packing element（4）First recess hole（14）Engagement；First steel skeleton（2）Right-hand member prop up expansion packing element
（4）Fourth face（13）；First steel skeleton（2）The second face（11）Prop up expansion packing element（4）Left side；
Second steel skeleton（7）With the first steel skeleton（2）Structure is identical；
Second steel skeleton（7）From central tube（5）Right-hand member socket central tube（5）, the second steel skeleton（7）The first groove cylinder
（10）Insert expansion packing element（4）Right output port；Second steel skeleton（7）The first groove cylinder（10）With expansion packing element（4）Second
Recess hole（15）Engagement；Second steel skeleton（7）First groove cylinder（10）The end face of side props up expansion packing element（4）The 5th face
（16）；Second steel skeleton（7）Right side prop up central tube（5）The 7th face（19）；
First sheath（3）It is socketed the first steel skeleton（2）, central tube（5）Left part and expansion packing element（4）Left part, the first sheath
（3）The 3rd face（12）Prop up expansion packing element（4）Left side；
Second sheath（6）With the first sheath（3）Structure is identical；
Second sheath（6）It is socketed the second steel skeleton（7）, central tube（5）Right part and expansion packing element（4）Right part, the second sheath
（6）The 3rd face（12）Prop up expansion packing element（4）Right side；
Top connection（1）Right output port socket central tube（5）With the first steel skeleton（2）Left part, top connection（1）Right-hand member prop up
One sheath（3）Left end, top connection（1）The first face（9）Prop up the first steel skeleton（2）Left end；
Back of the body cap（8）Right output port socket central tube（5）With the second steel skeleton（7）Right part, back of the body cap（8）Left side prop up second
Sheath（6）Right side；
It is symmetrical with central tube（5）Octahedral（20）Tube wall on be provided with multiple rectangular openings（18）, wherein size H be 0.23 ~
0.25mm；
In central tube（5）Outer cylinder on be provided with multiple grooves（17）, groove（17）Quantity and rectangular opening（18）Quantity phase
Together；Groove（17）In rectangular opening（18）Central tube（5）Column jacket surface side, groove（17）Bottom surface symmetrically include rectangular opening（18）
Section.
2. a kind of inflatable packer according to claim 1, it is characterised in that：
Central tube（5）Multiple rectangular openings on tube wall（18）, wherein size H is 0.23mm.
3. a kind of inflatable packer according to claim 1, it is characterised in that：
Central tube（5）Multiple rectangular openings on tube wall（18）, wherein size H is 0.24mm.
4. a kind of inflatable packer according to claim 1, it is characterised in that：
Central tube（5）Multiple rectangular openings on tube wall（18）, wherein size H is 0.25mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720219087.0U CN206530312U (en) | 2017-03-08 | 2017-03-08 | A kind of inflatable packer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720219087.0U CN206530312U (en) | 2017-03-08 | 2017-03-08 | A kind of inflatable packer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206530312U true CN206530312U (en) | 2017-09-29 |
Family
ID=59918176
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720219087.0U Active CN206530312U (en) | 2017-03-08 | 2017-03-08 | A kind of inflatable packer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206530312U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110331957A (en) * | 2019-08-06 | 2019-10-15 | 宝鸡瑞林石油机电设备有限责任公司 | A kind of repeatedly setting expansion type fracture packer |
| CN111075387A (en) * | 2018-10-22 | 2020-04-28 | 中国石油化工股份有限公司 | Expanding type water injection packer with shoulder protection sleeve on upper portion of rubber sleeve |
| CN112780216A (en) * | 2021-02-23 | 2021-05-11 | 大庆市天德忠石油科技有限公司 | Protection mechanism of expanding packer packing element |
-
2017
- 2017-03-08 CN CN201720219087.0U patent/CN206530312U/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111075387A (en) * | 2018-10-22 | 2020-04-28 | 中国石油化工股份有限公司 | Expanding type water injection packer with shoulder protection sleeve on upper portion of rubber sleeve |
| CN110331957A (en) * | 2019-08-06 | 2019-10-15 | 宝鸡瑞林石油机电设备有限责任公司 | A kind of repeatedly setting expansion type fracture packer |
| CN110331957B (en) * | 2019-08-06 | 2024-06-25 | 宝鸡瑞林石油机电设备有限责任公司 | Multiple-setting expansion type fracturing packer |
| CN112780216A (en) * | 2021-02-23 | 2021-05-11 | 大庆市天德忠石油科技有限公司 | Protection mechanism of expanding packer packing element |
| CN112780216B (en) * | 2021-02-23 | 2021-08-17 | 大庆市天德忠石油科技有限公司 | Protection mechanism of expanding packer packing element |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20210802 Address after: 123000 No. 1, Huadong street, Fuxin high tech Industrial Development Zone, Fuxin City, Liaoning Province Patentee after: FUXIN PETROLEUM TOOL WORKS Address before: 123000 No. 1, Huadong street, Fuxin high tech Industrial Park, Fuxin City, Liaoning Province Patentee before: FUXIN CHIYU PETROLEUM MACHINERY Co.,Ltd. |