CN202031527U - Pressing crack packer of barefoot well - Google Patents
Pressing crack packer of barefoot well Download PDFInfo
- Publication number
- CN202031527U CN202031527U CN2011200795049U CN201120079504U CN202031527U CN 202031527 U CN202031527 U CN 202031527U CN 2011200795049 U CN2011200795049 U CN 2011200795049U CN 201120079504 U CN201120079504 U CN 201120079504U CN 202031527 U CN202031527 U CN 202031527U
- Authority
- CN
- China
- Prior art keywords
- rubber cylinder
- packing element
- way
- pressure limiting
- valve body
- Prior art date
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- Expired - Fee Related
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Abstract
The utility model relates to a pressing crack packer of a barefoot well, comprising an upper joint, an upper rubber cylinder jacket, an inner tube, a rubber cylinder, a lower rubber cylinder jacket, a one-way pressure limiting valve body, a one-way valve, a pressure limiting valve and a lower joint. The rubber cylinder is sleeved outside the inner tube. The upper joint, the inner tube, the one-way pressure limiting valve body and the lower joint are sequentially connected. The lower part of the upper rubber cylinder jacket covers the upper part of the rubber cylinder, and the upper part of the upper rubber cylinder jacket is sleeved outside the upper joint. The upper part of the lower rubber cylinder covers the lower part of the rubber cylinder, and the lower part of the lower rubber cylinder jacket is sleeved outside the one-way pressure limiting valve body. A vertical duct and a radial communication hole are arranged on the one-way pressure limiting valve body, wherein the vertical duct is communicated with the radial communication hole, the one-way valve is installed on the vertical duct, and the pressure limiting valve is installed below the vertical duct. Due to the design of the pressure limiting valve, overpressure can not occur for the rubber cylinder, the rubber cylinder can be ensured to effectively work for a long time, and the pressing crack packer of the barefoot well is suitable for pressing crack operation of the barefoot well of an oil field. Due to the design of the one-way valve, the rubber cylinder is in an expanding state permanently. Therefore, the pressing crack packer of the barefoot well is suitable for the requirement of permanently plugging well bottom of the barefoot well of the oil field.
Description
Technical field
The utility model is the equipment that the oil field open hole well is used at the bottom of with plugged well, is a kind of open hole well pressure break packer.
Background technology
The inflatable packer that oil-field flooding is used is that packing element expands outwardly when the packing element internal pressure is higher than the packing element external pressure, realization sealing oil casing annular space.Will deblocking when present inflatable packer does not have pressure in inside, be not suitable at the bottom of the permanent plugged well of oil field open hole well, the inflatable packer that has is provided with unidirectional mechanism in inside, deblocking not in the time of can guaranteeing not have pressure reduction within a certain period of time, but keep the not limited time of deblocking, be not suitable for the requirement at the bottom of the permanent plugged well of oil field open hole well yet, it does not have pressure limiting mechanism yet, cause the packing element superpressure to damage easily, do not reach the requirement at the bottom of the plugged well.
Summary of the invention
The purpose of this utility model provides a kind of open hole well pressure break packer, is applicable to oil field open hole well fracturing work, and at the bottom of the permanent plugged well of energy.
The purpose of this utility model is achieved in that and comprises top connection, last packing element sheath, interior pipe, packing element, last packing element sheath, the one-way pressure-limit valve body, one way valve, pressure limiting valve, lower contact, packing element is sleeved on outside the interior pipe, top connection, interior pipe, the one-way pressure-limit valve body, lower contact connects successively, last packing element sheath bottom covers packing element top, last packing element sheath top is sleeved on outside the top connection, lower rubber cylinder sheath top covers the packing element bottom, it is external that lower rubber cylinder sheath bottom is sleeved on one-way pressure-limit valve, vertical duct is arranged on the one-way pressure-limit valve body, radially linked hole is arranged on the one-way pressure-limit valve body, vertical duct communicates with linked hole radially, on the vertical duct one way valve is installed, under the vertical duct pressure limiting valve is installed, the step plunger shaft is arranged in the pressure limiting valve.
Between top connection, the last packing element sheath position-limitting pin is installed.
The beneficial effects of the utility model are: designed pressure limiting valve, packing element can superpressure, can guarantee the permanently effective work of packing element, be applicable to oil field open hole well fracturing work, designed one way valve, make packing element forever be in expansion state, therefore, the utility model is applicable to the requirement at the bottom of the permanent plugged well of oil field open hole well.
Description of drawings
Fig. 1 is a structure assembling drawing of the present utility model.
The specific embodiment
Below in conjunction with Fig. 1 embodiment of the present utility model is described.
As shown in the figure, embodiment of the present utility model comprises top connection 1, last packing element sheath 3, interior pipe 4, packing element 5, last packing element sheath 6, one-way pressure-limit valve body 7, one way valve 8, pressure limiting valve 11, lower contact 12, manage outside 4 in packing element 5 is sleeved on, top connection 1, interior pipe 4, one-way pressure-limit valve body 7, lower contact 12 connects successively, last packing element sheath 3 bottoms cover packing element 5 tops, last packing element sheath 3 tops are sleeved on outside the top connection 1, lower rubber cylinder sheath 6 tops cover packing element 5 bottoms, lower rubber cylinder sheath 6 bottoms are sleeved on outside the one-way pressure-limit valve body 7, vertical duct 9 is arranged on the one-way pressure-limit valve body 7, radially linked hole 10 is arranged on the one-way pressure-limit valve body 7, vertical duct 9 communicates with linked hole 10 radially, on the vertical duct 9 one way valve 8 is installed, liquid can only flow in the packing element 5 from vertical duct 9, can not flow out in packing element 5.Under the vertical duct 9 pressure limiting valve 11 is installed, pressure limiting valve 11 cut out linked hole 10 when pressure reached setting, and step plunger shaft 13 is arranged in the pressure limiting valve 11.Top connection 1, go up position-limitting pin 2 is installed between the packing element sheath 3, when last packing element sheath 3 axial floats, position-limitting pin 2 is spacing at shoulder place, top connection 1 bottom.
Linked hole 10 on the one-way pressure-limit valve body 7 can with step plunger shaft 13 UNICOMs in the pressure limiting valve 11.
The utility model is down behind open hole well packing position, inwardly water filling, inject water earlier from interior pipe 4 through radially linked hole 10, vertical duct 9 are backed down one way valve 8 and entered in the packing element 5, the shaft bottom of packing element 5 expansion sealing barefoot completions, one way valve 8 can not leak the hydraulic pressure that enters in the packing element 5, packing element 5 keeps expansion state, make the shaft bottom of the permanent shutoff barefoot completion of packing element, after pressure is raised to rated pressure, pressure limiting valve 11 moves up under the area difference effect of step piston, and seal radially linked hole 10, and hydraulic pressure can not be entered in the packing element 5, packing element 5 can not bear hyperpressure.
Claims (2)
1. open hole well pressure break packer, comprise top connection (1), last packing element sheath (3), interior pipe (4), packing element (5), last packing element sheath (6), one-way pressure-limit valve body (7), one way valve (8), pressure limiting valve (11), lower contact (12), it is characterized in that: packing element (5) is sleeved on outside the interior pipe (4), top connection (1), interior pipe (4), one-way pressure-limit valve body (7), lower contact (12) connects successively, last packing element sheath (3) bottom covers packing element (5) top, last packing element sheath (3) top is sleeved on outside the top connection (1), lower rubber cylinder sheath (6) top covers packing element (5) bottom, lower rubber cylinder sheath (6) bottom is sleeved on outside the one-way pressure-limit valve body (7), vertical duct (9) is arranged on the one-way pressure-limit valve body (7), radially linked hole (10) is arranged on the one-way pressure-limit valve body (7), vertical duct (9) communicates with linked hole (10) radially, on the vertical duct (9) one way valve (8) is installed, under the vertical duct (9) pressure limiting valve (11) is installed, step plunger shaft (13) is arranged in the pressure limiting valve (11).
2. open hole well pressure break packer according to claim 1 is characterized in that: between top connection (1), the last packing element sheath (3) position-limitting pin (2) is installed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200795049U CN202031527U (en) | 2011-03-15 | 2011-03-15 | Pressing crack packer of barefoot well |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200795049U CN202031527U (en) | 2011-03-15 | 2011-03-15 | Pressing crack packer of barefoot well |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202031527U true CN202031527U (en) | 2011-11-09 |
Family
ID=44893829
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011200795049U Expired - Fee Related CN202031527U (en) | 2011-03-15 | 2011-03-15 | Pressing crack packer of barefoot well |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202031527U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102094591A (en) * | 2011-03-15 | 2011-06-15 | 东营市兆鑫工贸有限责任公司 | Fracturing packer for barefoot well |
-
2011
- 2011-03-15 CN CN2011200795049U patent/CN202031527U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102094591A (en) * | 2011-03-15 | 2011-06-15 | 东营市兆鑫工贸有限责任公司 | Fracturing packer for barefoot well |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20111109 Termination date: 20140315 |