CN205314959U - Sit step by step and seal expanding packer - Google Patents
Sit step by step and seal expanding packer Download PDFInfo
- Publication number
- CN205314959U CN205314959U CN201620096503.8U CN201620096503U CN205314959U CN 205314959 U CN205314959 U CN 205314959U CN 201620096503 U CN201620096503 U CN 201620096503U CN 205314959 U CN205314959 U CN 205314959U
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- CN
- China
- Prior art keywords
- shear pin
- elastic base
- pin hole
- packer
- inflatable packer
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Abstract
The utility model discloses a sit step by step and seal expanding packer, including the center tube, to connect in the top connection and the lower clutch at center tube both ends, the packing element last sheath and lower sheath at both ends are from top to bottom located to the packing element of expansible, cover to and locate down the cylinder liner of sheath below, install the elasticity ball seat of expansible in the center tube, still include with this elasticity ball seat complex steel ball. Offered the shear pin hole on the lateral wall of lower clutch, the shear pin that the elasticity ball seat passes through in the shear pin hole is fixed, the sheath inboard is equipped with the circular bead that is used for preventing elasticity ball seat whereabouts down. Use the packer, can realize that a plurality of packers separate from up sealing step by step down, make the packer setting who corresponds, and other packers of upper strata are not sat simultaneously and are sealed.
Description
Technical field
This utility model relates to a kind of packer, refers in particular to a kind of stepped setting inflatable packer.
Background technology
Packer means have elastic sealing elements, and annular space between packing various sizes tubing string and well and between tubing string whereby, and completely cuts off payzone, to control to produce (note) liquid, protects the downhole tool of sleeve pipe. Because the packer quantity installed in drill string is more, fracturing fluid can make packer all set when injecting, so just the packer premature setting in top portion is caused, annular space balance pressure can not balance the operting differential pressure of lower packer, the packer causing bottom lost efficacy because differential pressure is too high, also produced unnecessary consume simultaneously. The patent No. is the Chinese patent " stepped setting fracture packer " of 201120489411, its technical scheme is: throws steel ball in central canal and is seated on ball seat, water filling is suppressed to cut off and is set shear pin, sliding sleeve and ball seat connect descending by fixture block, open the inlet opening at adapter sleeve place, when sliding sleeve goes downwards to lower contact endoporus shoulder place, rise outside fixture block, packer feed pathway is opened, when intrinsic pressure higher than external pressure 2Mpa time packer setting. Wherein ball seat is descending together with steel ball, and steel ball is arranged on ball seat all the time, it is easy to results in blockage, brings inconvenience to use procedure.
Utility model content
This utility model provides a kind of stepped setting inflatable packer, can not the problem of stepped setting it is intended that solve packer.
Stepped setting inflatable packer, including central canal, it is connected to top connection and the lower contact at central canal two ends, distensible packing element, it is sheathed on upper jacket and the lower jacket at the upper and lower two ends of packing element, and it is located at the cylinder sleeve below lower jacket, also include the distensible elastic base being installed in central canal and the steel ball coordinated with this elastic base; The sidewall of described lower contact offers shear pin hole, shear pin hole is equipped with the shear pin for fixing elastic base, inside described lower jacket, be provided with the shoulder for preventing elastic base from falling.
Wherein, described elastic base upper end circumferentially has several elongated slot equably so that several elastic claw is formed at top.
Wherein, the sidewall of described lower contact offering some inlet openings, this inlet opening and shear pin hole are positioned on the same circumference of lower contact.
Wherein, the both sides up and down in described shear pin hole are equipped with sealing ring.
Wherein, being provided with filter screen outside described elastic base, when elastic base is stuck on shoulder, this filter screen is connected with inlet opening and shear pin hole.
Wherein, described cylinder sleeve lower end is provided with baffle ring, and this baffle ring is fixed on outside lower contact.
Use packer described in the utility model, it may be achieved multiple packers insulate from the bottom up step by step, make the packer setting of correspondence, and set during other packer differences of upper strata. Adopting elastic base in this product, can pass through elastic steel ball can depart from from elastic base, it is prevented that blocking. Meanwhile, outside elastic base, it is provided with filter screen, thus preventing fracturing sand from entering inlet opening, it is prevented that inlet opening blocks. It addition, by baffle ring be designed to prevent from cylinder sleeve to be axially moveable making packing element shrink.
Accompanying drawing explanation
Fig. 1 is before steel ball falls into elastic base, the sectional view of described stepped setting inflatable packer.
Fig. 2 is after steel ball falls into elastic base, the sectional view of described stepped setting inflatable packer.
Fig. 3 is the cross sectional representation of inlet opening position in described stepped setting inflatable packer.
Fig. 4 is the partial cutaway view schematic of described elastic base.
Detailed description of the invention
Detailed description of the invention of the present utility model is as follows:
A kind of stepped setting inflatable packer, with reference to Fig. 1, Fig. 2, Fig. 3 and Fig. 4, the respectively top connection 1 of the two ends up and down of central canal 4 and lower contact 11, central canal 4 outer sheath is provided with packing element 3, and this packing element 3 can expand outwardly after the pressurizing. The two ends up and down of packing element 3 are arranged with upper jacket 2 and lower jacket 5 respectively, wherein lower jacket 5 be connected with cylinder sleeve 6, this cylinder sleeve 6 is positioned at outside lower contact 11. Being provided with an elastic base 10 in central canal 4, elastic base 10 upper end circumferentially has several elongated slot equably so that several elastic claw 100 is formed at top. Elastic claw 100 is gathered to be contracted in and is formed for ball seat together afterwards, is used for accepting steel ball 7, can automatically restore to free state after removing constraint under elastic force, makes steel ball 7 drop. It is provided with shoulder 110 inside lower contact 11, is stuck in after elastic base 10 is descending on this shoulder 110. The sidewall of described lower contact 11 offers 4 inlet openings 13 and 2 shear pin holes 14 along same circumference, elastic base 10 and lower contact 11 are fixed by the shear pin 9 in shear pin hole 14, the both sides up and down of inlet opening 13 are equipped with sealing ring 15, it is prevented that when not setting, fracturing fluid flows out from shear pin hole 14 and inlet opening 13. Being provided with filter screen 8 outside elastic base 10, when elastic base 10 is descending, filter screen 8 is connected with inlet opening 13 and shear pin hole 14, it is prevented that fracturing sand enters inlet opening 13 and shear pin hole 14, results in blockage. Cylinder sleeve 6 lower end is provided with a circle and is fixed on the baffle ring 12 outside lower contact 11, can be used for preventing cylinder sleeve 6 from being produced mobile by the extruding of lower attachment, thus preventing packing element 3 to be squeezed.
Being installed in String by multiple packers described in the utility model, wherein the aperture of elastic base 10 increases from lower to upper successively, and the diameter of each steel ball 7 of input also increases successively. First steel ball 7 diameter put into is more than elastic base 10 aperture of bottom packer, less than elastic base 10 aperture of other packers of top. Steel ball 7 puts in central canal 4 and falls within elastic base 10, water filling is suppressed to cut off and is set shear pin 9, elastic base 10 is descending, fracturing fluid inlet opening 13 in lower contact 11 and shear pin hole 14 flow into lower contact 11 and the annular clearance of cylinder sleeve 6, gap again through central canal 4 and packing element 3, hydraulic pressure struts packing element, it is achieved set.Ball seat resilience under natural resiliency power effect that the elastic claw 100 of elastic base 10 is formed. It is descending that steel ball 7 departs from elastic base 10. Put into steel ball 7 successively, make packer stepped setting from lower to upper.
Foregoing description has illustrated explanation and the description of utility model. It is not configured to be limited to this utility model disclosed form and mode. According to above mode, it is possible to carry out amendment accordingly or change. It is in order to of the present utility model principle and practicality thereof are better described that example is discussed, thus utilizing this utility model carry out various amendment and meet other specific demand. All such modifications and change are when understanding according to fair and legal right, and according to accessory claim, these modifications and variations broadly fall in scope of the present utility model.
Claims (6)
1. stepped setting inflatable packer, including central canal, it is connected to top connection and the lower contact at central canal two ends, distensible packing element, it is sheathed on upper jacket and the lower jacket at the upper and lower two ends of packing element, and it is located at the cylinder sleeve below lower jacket, it is characterised in that: also include the distensible elastic base being installed in central canal and the steel ball coordinated with this elastic base; The sidewall of described lower contact offers shear pin hole, shear pin hole is equipped with the shear pin for fixing elastic base, inside described lower jacket, be provided with the shoulder for preventing elastic base from falling.
2. stepped setting inflatable packer as claimed in claim 1, it is characterised in that: described elastic base upper end circumferentially has several elongated slot equably so that several elastic claw is formed at top.
3. stepped setting inflatable packer as claimed in claim 1, it is characterised in that: offering some inlet openings on the sidewall of described lower contact, this inlet opening and shear pin hole are positioned on the same circumference of lower contact.
4. the stepped setting inflatable packer as described in claim 1 or 3, it is characterised in that: the both sides up and down in described shear pin hole are equipped with sealing ring.
5. stepped setting inflatable packer as claimed in claim 3, it is characterised in that: being provided with filter screen outside described elastic base, when elastic base is stuck on shoulder, this filter screen is connected with inlet opening and shear pin hole.
6. stepped setting inflatable packer as claimed in claim 1, it is characterised in that: described cylinder sleeve lower end is provided with baffle ring, and this baffle ring is fixed on outside lower contact.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620096503.8U CN205314959U (en) | 2016-01-29 | 2016-01-29 | Sit step by step and seal expanding packer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620096503.8U CN205314959U (en) | 2016-01-29 | 2016-01-29 | Sit step by step and seal expanding packer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205314959U true CN205314959U (en) | 2016-06-15 |
Family
ID=56187779
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620096503.8U Active CN205314959U (en) | 2016-01-29 | 2016-01-29 | Sit step by step and seal expanding packer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205314959U (en) |
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2016
- 2016-01-29 CN CN201620096503.8U patent/CN205314959U/en active Active
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |