CN203175451U - Novel underground fishing tool for oil field - Google Patents
Novel underground fishing tool for oil field Download PDFInfo
- Publication number
- CN203175451U CN203175451U CN 201320183339 CN201320183339U CN203175451U CN 203175451 U CN203175451 U CN 203175451U CN 201320183339 CN201320183339 CN 201320183339 CN 201320183339 U CN201320183339 U CN 201320183339U CN 203175451 U CN203175451 U CN 203175451U
- Authority
- CN
- China
- Prior art keywords
- conical surface
- claw
- rubber ring
- fishing tool
- axis
- 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 - Fee Related
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Abstract
The utility model discloses a novel underground fishing tool for an oil field. The fishing tool mainly consists of a casing, a spring, a clamp claw, a bipyramid, a rubber ring and safety shear pins, wherein connecting threads are formed inside the upper end of the casing, and the bipyramid is sleeved at the lower end inside the casing and is fixed with the casing together through the two shear pins. The clamp claw is formed by splicing two semi-circular clamp claw bodies together through the rubber ring, a groove is formed on an excircle of the lower portion of the clamp claw, and the rubber ring is installed in the groove. The outside of the lower portion of the clamp claw is a conical surface, the conical surface is adhered to an upper conical surface of the bipyramid together, and an included angle formed by the conical surface and the axis is the same as an included angle formed by the upper conical surface and the axis. Two semi-circular clamp hoops are horizontally arranged on an inner wall of the lower end of the clamp claw, the upper ends of the clamp hoops are planes, the lower ends of the clamp hoops are conical surfaces, and included angles formed by the conical surfaces and the axis are the same as an included angle formed by a lower conical surface of the bipyramid and the axis to form smooth transition. Two cylindrical faces different in diameter are located inside the clamp claw, the diameter of the upper cylindrical face is large, a plane shoulder is located between the two cylindrical faces, and a compression spring is arranged on the plane shoulder.
Description
Technical field
The utility model relates to a kind of novel oilfield down-hole fishing tool.
Background technology
In the field produces operation process, run into the operation of salvaging downhole tool through regular meeting, as salvaging the downhole tool of band fishing head, as the switching tools of water distributor core, hydraulic packer seat blocking rod, switch valve etc.Lack effective special-purpose fishing tool at present.
Summary of the invention
The purpose of this utility model is to provide a kind of novel oilfield down-hole fishing tool, and it is simple in structure, can salvage the oil field downhole tool effectively, reduces labor strength.
The purpose of this utility model is to realize like this, a kind of novel oilfield down-hole fishing tool, fishing tool mainly is made up of housing, spring, claw, bicone, rubber ring and safe shear pin, housing is arranging connecting thread in the upper end, bicone is sleeved on lower end, housing the inside, and is fixed together by two shear pins and housing; Claw by two semicircular jaw body by rubber ring to being stitched together, claw bottom cylindrical is provided with groove, rubber ring just is installed in the groove, and outside, claw bottom is a conical surface, and the last conical surface of this conical surface and bicone fits together, both are identical with the angle of axis, be horizontally disposed with two semicircle clips on the inwall of claw lower end, the clip upper end is a plane, and the lower end is the conical surface, the following conical surface of this conical surface and bicone is identical with the angle of axis, and formation seamlessly transits; There are two faces of cylinder that diameter is different the claw the inside, and top face of cylinder diameter is bigger, is a plane shoulder between the two cylindrical surface, and the compression spring is being set on the shoulder.
Fishing tool usually carries out operation with steel wire, connects weighted lever above it when adopting steel wire operation, connects wire rope socket above the weighted lever.With steel wire with in the fishing tool lower going-into-well, when fishing tool touches the fishing head of salvaging on the target, continue to transfer steel wire, make the weight of weighted lever give downward power of fishing tool, the fishing head that is cone enters the fishing tool the inside under the guiding of the conical surface under the bicone in fishing tool, when fishing head touches the clip of claw claw upwards pushed away (spring is further compressed), radial motion (opening) also takes place in clip when moving upward, this moment, rubber ring also was stretched, and made the bigger fishing head of external diameter enter the claw the inside by clip.Fishing head is by behind the clip, claw moves downward under the effect of spring force, when the conical surface of clip touches on the bicone conical surface, claw is subjected to an inside radial load, rubber ring is also shrinking this moment, also give convergent force of claw, claw shrinks rapidly under the effect of these two power, and clip is held fishing rod tightly.Carry fishing tool on this moment, the clip of claw is just tightly embraced fishing rod, and the plane of clip upper end lifts the complete operation of power on fishing head to power that makes progress of transverse plane under the fishing head on the steel wire, can propose in well salvaging object.Just in case target is salvaged thing and is stuck, the pulling force of steel wire reaches or near its specified value of thrust, safe shear pin will be cut off, and bicone, claw and spring in the fishing tool housing come off, and steel wire proposes housing, can avoid breaking steel wire.The utility model is simple in structure, can salvage the oil field downhole tool effectively, reduces labor strength.
Description of drawings
Below in conjunction with accompanying drawing the utility model is described in further detail.
Fig. 1 looks cross-sectional view for master of the present utility model.
The specific embodiment
A kind of novel oilfield down-hole fishing tool, as shown in Figure 1, fishing tool mainly is made up of housing 1, spring 2, claw 3, bicone 4, rubber ring 5 and safe shear pin 6, housing is arranging connecting thread in 1 upper end, bicone 4 is sleeved on lower end, housing 1 the inside, and is fixed together by two shear pins 6 and housing 1; Claw 3 by two semicircular jaw body by rubber ring to being stitched together, claw 3 bottom cylindricals are provided with groove, rubber ring 5 just is installed in the groove.Outside, claw 3 bottoms is a conical surface, the last conical surface of this conical surface and bicone fits together, both are identical with the angle of axis, be horizontally disposed with two semicircle clips on the inwall of claw lower end, the clip upper end is a plane, the lower end is the conical surface, and the following conical surface of this conical surface and bicone is identical with the angle of axis, and formation seamlessly transits; There are two faces of cylinder that diameter is different claw 3 the insides, and top face of cylinder diameter is bigger, are a plane shoulder between the two cylindrical surface, and compression spring 2 is being set on the shoulder.
As shown in Figure 1, housing 1 center is provided with a through hole, makes this fishing tool can be used for the sand washing fishing.
Claims (1)
1. novel oilfield down-hole fishing tool, fishing tool mainly is made up of housing, spring, claw, bicone, rubber ring and safe shear pin, it is characterized in that: housing is arranging connecting thread in the upper end, bicone is sleeved on lower end, housing the inside, and is fixed together by two shear pins and housing; Claw by two semicircular jaw body by rubber ring to being stitched together, claw bottom cylindrical is provided with groove, rubber ring just is installed in the groove, and outside, claw bottom is a conical surface, and the last conical surface of this conical surface and bicone fits together, both are identical with the angle of axis, be horizontally disposed with two semicircle clips on the inwall of claw lower end, the clip upper end is a plane, and the lower end is the conical surface, the following conical surface of this conical surface and bicone is identical with the angle of axis, and formation seamlessly transits; There are two faces of cylinder that diameter is different the claw the inside, and top face of cylinder diameter is bigger, is a plane shoulder between the two cylindrical surface, and the compression spring is being set on the shoulder.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320183339 CN203175451U (en) | 2013-04-12 | 2013-04-12 | Novel underground fishing tool for oil field |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320183339 CN203175451U (en) | 2013-04-12 | 2013-04-12 | Novel underground fishing tool for oil field |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203175451U true CN203175451U (en) | 2013-09-04 |
Family
ID=49072166
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320183339 Expired - Fee Related CN203175451U (en) | 2013-04-12 | 2013-04-12 | Novel underground fishing tool for oil field |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203175451U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112696167A (en) * | 2019-10-23 | 2021-04-23 | 中国石油化工股份有限公司 | Underground fishing device |
-
2013
- 2013-04-12 CN CN 201320183339 patent/CN203175451U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112696167A (en) * | 2019-10-23 | 2021-04-23 | 中国石油化工股份有限公司 | Underground fishing device |
| CN112696167B (en) * | 2019-10-23 | 2022-07-26 | 中国石油化工股份有限公司 | Underground fishing device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130904 Termination date: 20190412 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |