CN201738872U - Fishable bridge plug of oil well - Google Patents
Fishable bridge plug of oil well Download PDFInfo
- Publication number
- CN201738872U CN201738872U CN2010202589291U CN201020258929U CN201738872U CN 201738872 U CN201738872 U CN 201738872U CN 2010202589291 U CN2010202589291 U CN 2010202589291U CN 201020258929 U CN201020258929 U CN 201020258929U CN 201738872 U CN201738872 U CN 201738872U
- Authority
- CN
- China
- Prior art keywords
- central tube
- inner cylinder
- bridge plug
- well
- oil
- 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.)
- Expired - Lifetime
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Abstract
The utility model relates to a fishable bridge plug of an oil well, which comprises a rubber cylinder (4), a central tube (6), a tapered anchor (7) and the like, and is characterized in that the outer tube wall of the central tube (6) is provided with a hydraulic cylinder (5) formed by an inner cylinder sleeve, an outer cylinder sleeve, an upper piston and a lower piston, which are installed by a shear pin; and a self-locking device is also installed between the inner cylinder sleeve and the upper piston as well as the lower piston. The fishable bridge plug of the oil well is simple in structure, convenient for operation and reliable in work, is used for plugging a layer position of a small-sleeve oil and water well of an oil field, and can be fished out from the well by a fishing device, thus obviously reducing construction difficulty of unblocking, and simultaneously reducing the probability of downhole accidents.
Description
Technical field: the utility model relates to a kind of oil field downhole tool, especially for a kind of oil well retrievable bridge plug of small casing oil, well.
Background technology: before the utility model, each oil field is all kinds of fixed bridging plugs of many employings when shutoff small casing oil, well layer position, because must adopt complicated underground work to finish during such device deblocking, not only difficulty of construction is big, and causes the generation of down-hole accident easily.
Summary of the invention: the purpose of this utility model is: for oil field shutoff small casing oil, well layer position provide a kind of oil well retrievable bridge plug, because this device can be pulled out from the down-hole by fisher, thereby obviously reduced the difficulty of construction of deblocking, also reduced the probability that down-hole accident takes place simultaneously.
The purpose of this utility model realizes by following measure: a kind of oil well retrievable bridge plug, comprise fishing joint, salvage body, bailer grab, packing element, central tube, anchoring cone, and constituted fishing device by fishing joint, salvaging body, bailer grab, the central tube outer tube wall top that the upper end has the long tubular of salvaging groove is set with packing element, the bottom is set with anchoring cone, it is characterized in that between the packing element and anchoring cone on the central tube outer tube wall, also the upper piston of one inner cylinder liner by tubulose, outer cylinder sheath and ring-type, the fluid power cylinder that lower piston constitutes are installed by shear pin; And the jaw self-locking device also is installed between upper piston and lower piston and the inner cylinder liner, and the inner cylinder liner middle part is processed with inlet opening.
The utility model is simple in structure, easy to operate, reliable operation, is used for oil field shutoff small casing oil, well layer position, can pull out from the down-hole by fishing device, thereby obviously reduce the difficulty of construction of deblocking, has also reduced the probability that down-hole accident takes place simultaneously.
Description of drawings: Fig. 1 is the structural representation of oil well retrievable bridge plug.
The specific embodiment: the oil well retrievable bridge plug is to be made of fishing joint 1, salvaging body 2, bailer grab 3, packing element 4, fluid power cylinder 5, central tube 6, anchoring cone 7 etc.Constituted fishing device by fishing joint 1, salvaging body 2, bailer grab 3; The central tube 6 outer tube wall tops that the upper end has the long tubular of salvaging groove are set with packing element 4, the bottom is set with anchoring cone 7; Between the packing element 4 and anchoring cone 7 on central tube 6 outer tube walls, also the upper piston of one inner cylinder liner by tubulose, outer cylinder sheath and ring-type, the fluid power cylinder 5 that lower piston constitutes are installed by shear pin, and the jaw self-locking device also is installed between upper piston and lower piston and the inner cylinder liner, and the inner cylinder liner middle part is processed with inlet opening.
The operating principle and the using method of oil well retrievable bridge plug are: earlier fishing device is installed standby before using; Connect tubing string with precalculated position under this device lower going-into-well by central tube 6 again, can pressurize this moment by tubing string, high pressure liquid stream then enters between upper piston and the lower piston by the inlet opening of inner cylinder liner on central tube 6 and the fluid power cylinder 5, and it is moved respectively up and down, finish the operation of plugged zone position; Packing element 4 is discharged and the plugged zone position, instantly then make anchoring cone 7 expansions during descent of piston and this device is fixed, this moment, upper piston and lower piston can be located on inner cylinder liner by self-locking device, and then tubing string and central tube 6 slipped out of the hand and tripped out.During as this device of need deblocking, can connect the fishing device G.I.H by tubing string, and salvaging body 2 is entered in the salvaging groove on central tube 6, bailer grab 3 its tops of embedding, carrying tubing string again cuts off the shear pin between central tube 6 and the fluid power cylinder 5,5 in fluid power cylinder with on move, and packing element 4 and anchoring cone 7 are also shunk thereupon, carry tubing string on just can continuing this moment this device is pulled out from the down-hole, thereby finish unsealing operation.
Claims (1)
1. oil well retrievable bridge plug, comprise fishing joint, salvage body, bailer grab, packing element, central tube, anchoring cone, and constituted fishing device by fishing joint, salvaging body, bailer grab, the central tube outer tube wall top that the upper end has the long tubular of salvaging groove is set with packing element, the bottom is set with anchoring cone, it is characterized in that: between the packing element and anchoring cone on the central tube outer tube wall, also the upper piston of one inner cylinder liner by tubulose, outer cylinder sheath and ring-type, the fluid power cylinder that lower piston constitutes are installed by shear pin; And the jaw self-locking device also is installed between upper piston and lower piston and the inner cylinder liner, and the inner cylinder liner middle part is processed with inlet opening.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010202589291U CN201738872U (en) | 2010-07-06 | 2010-07-06 | Fishable bridge plug of oil well |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010202589291U CN201738872U (en) | 2010-07-06 | 2010-07-06 | Fishable bridge plug of oil well |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201738872U true CN201738872U (en) | 2011-02-09 |
Family
ID=43554150
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010202589291U Expired - Lifetime CN201738872U (en) | 2010-07-06 | 2010-07-06 | Fishable bridge plug of oil well |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201738872U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107724994A (en) * | 2017-11-21 | 2018-02-23 | 成都铭鉴知源油田工程科技有限公司 | A kind of big orifice bridging plug and release method |
-
2010
- 2010-07-06 CN CN2010202589291U patent/CN201738872U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107724994A (en) * | 2017-11-21 | 2018-02-23 | 成都铭鉴知源油田工程科技有限公司 | A kind of big orifice bridging plug and release method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20110209 |