CN201428408Y - General overshot for oil well workover operation - Google Patents
General overshot for oil well workover operation Download PDFInfo
- Publication number
- CN201428408Y CN201428408Y CN2009200140285U CN200920014028U CN201428408Y CN 201428408 Y CN201428408 Y CN 201428408Y CN 2009200140285 U CN2009200140285 U CN 2009200140285U CN 200920014028 U CN200920014028 U CN 200920014028U CN 201428408 Y CN201428408 Y CN 201428408Y
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- CN
- China
- Prior art keywords
- fish
- bivalve
- slips
- spring
- fishing
- 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 relates to a general overshot for the oil well workover operation, which consists of an upper joint, a cylinder, a spring seat, a spring, a double-valve slip and a guide shoe, and ischaracterized in that the upper end of the cylinder is connected with the upper joint through threads, and the guide shoe is arranged at the lower end of the cylinder; and the spring and the spring seat are arranged at the upper part of the inside of the cylinder, and the double-valve slip is arranged at the lower part thereof. The overshot has reasonable design, simple structure and strong adaptability, and has the characteristics of large fishing range, fish-top-pass fishing, general fishing of pipes and rods, catching fishing and hanging fishing, and the like, can save operating cost, improves the success rate of fishing, and greatly facilitates the oil well workover operation.
Description
Technical field:
The utility model relates to a kind of downhole tool that is used for oilfield oil well well workover fishing, belongs to petroleum well workover operation technique class.
Background technology:
Workover treatment is an important process in the oil development manufacturing process, and along with oil field development and the prolongation of oil-water well production time, the trouble of lost tool in hole accident increases gradually, and the workload of well workover fishing also increases thereupon.At present, mainly there is following problem in all kinds of fishing sockets that use in the on-the-spot workover treatment: 1. slips folding size is little, and salvaging is limited in scope; 2. existing equipment can not be crossed the top of fish salvaging; 3. can not be general when salvaging tubing and bar class junk; 4. a slips has only a kind of mode of dragging for of grabbing.Owing to have the problems referred to above, make the oil-water well fishing not carry out smoothly, and fishing success ratio be affected.
The utility model content:
This novel purpose is to provide a kind of and salvages that scope is big, can crossing top of fish, to salvage, salvage tubing bar class junk general and have to grab and drag for and hang the general fishing socket of oil-water well workover treatment that drags for two kinds of functions.
The utility model purpose is achieved in that this kind fishing socket is made of top connection, cylindrical shell, spring base and spring, bivalve slips, guide shoe.Its structure and assembled relation are as follows: the cylindrical shell upper end is with the top connection that is threaded, and the cylindrical shell lower end is provided with guide shoe; The cylindrical shell internal upper part is provided with spring and spring base, and the bottom is provided with the bivalve slips.During workover treatment, this fishing socket is hinged with in the fishing string lower end also G.I.H thereupon by top connection, contact with the bivalve slips after fish head (be trouble of lost tool in hole upper end) enters guide shoe, move on the effect lower spring compression spring base of thrust, the bivalve slips moves on the cylindrical shell conical surface and opens.The fish head passes the bivalve slips, spring base entered the fish chamber, up to the box cupling arrival of fish or above behind the position of bivalve slips, but with regard to upper lifting pipe post engagement with the fish.When the outside dimension of fish and slips facing size near the time, the facing of bivalve slips is embraced fish, finishes to grab and drags for operation; When fish box cupling external diameter during greater than bivalve slips facing diameter, the fish box cupling entered the fish chamber by slips, and slips return under spring action is closed, and fish box cupling seat is finished to grab and dragged on the upper surface of slips.Therefore, no matter be that bar class or this fishing socket of tubing junk all can successfully be salvaged.
The utility model is reasonable in design, and is simple in structure, and compliance is strong, have the salvaging scope big, can cross that top of fish is salvaged, pipe bar class junk is general and can grab the characteristics such as drag for of hanging of dragging for, utilize it can save operating cost, improve fishing success ratio, for the oil-water well workover treatment provides great facility.
Description of drawings:
Fig. 1 is a structural representation of the present utility model.Among the figure, label 7 was the fish chamber.
Fig. 2 is the structural representation of bivalve slips, and Fig. 3 is its sectional drawing.
The specific embodiment:
Below in conjunction with accompanying drawing enforcement of the present utility model is illustrated.
As shown in Figure 1, the utility model is made up of top connection 1, spring base 2, spring 3, cylindrical shell 4, bivalve slips 5, guide shoe 6.Wherein, be provided with the fish chamber in this fishing socket, top connection 1, spring base 2, spring 3 are equipped with the passage that passes for top of fish, thereby realize the top of fish salvaging.Cylindrical shell 4 has the cylinder of internal thread for the upper end, the conical surface of bottom inner headed face for matching with bivalve slips 5 conical surfaces.Bivalve slips 5 (see figure 2)s are bivalve formula structure, and the contact surface between the bivalve slips is a neat section, and its top is cylinder, the bottom periphery is the conical surface, its lower surface is provided with to hang drags for the junk shoulder, and inner headed face is band tooth curved surface, can embrace fish realization facing and grab and drag for.
Claims (3)
1, the general fishing socket of a kind of oil-water well workover treatment, form by top connection (1), spring base (2), spring (3), cylindrical shell (4), bivalve slips (5), guide shoe (6), it is characterized in that: cylindrical shell 4 upper ends are with the top connection that is threaded (1), and the cylindrical shell lower end is provided with guide shoe (6); Cylindrical shell (4) internal upper part is provided with spring (3) and spring base (2), and the bottom is provided with bivalve slips (5).
2, the general fishing socket of oil-water well workover treatment according to claim 1 is characterized in that, is provided with the fish chamber in this fishing socket, and top connection (1), spring base (2), spring (3) are equipped with the passage that passes for top of fish, thereby realizes the top of fish salvaging.
3, the general fishing socket of oil-water well workover treatment according to claim 1, it is characterized in that, bivalve slips (5) is a bivalve formula structure, contact surface between the bivalve slips is a neat section, its top is cylinder, and the bottom periphery is the conical surface, and its lower surface is provided with to hang drags for the junk shoulder, inner headed face is band tooth curved surface, can embrace fish and realize that facing is grabbed and drag for.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009200140285U CN201428408Y (en) | 2009-05-31 | 2009-05-31 | General overshot for oil well workover operation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009200140285U CN201428408Y (en) | 2009-05-31 | 2009-05-31 | General overshot for oil well workover operation |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201428408Y true CN201428408Y (en) | 2010-03-24 |
Family
ID=42032143
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009200140285U Expired - Fee Related CN201428408Y (en) | 2009-05-31 | 2009-05-31 | General overshot for oil well workover operation |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201428408Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106150415A (en) * | 2016-07-01 | 2016-11-23 | 陕西延长石油装备制造有限公司 | A kind of multifunctional pumping rod fisher and method of work thereof |
| CN111894565A (en) * | 2020-07-14 | 2020-11-06 | 中煤科工开采研究院有限公司 | Device for testing crack expansion in surrounding rock |
| CN112145113A (en) * | 2019-06-28 | 2020-12-29 | 中国石油天然气股份有限公司 | Fishing device |
-
2009
- 2009-05-31 CN CN2009200140285U patent/CN201428408Y/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106150415A (en) * | 2016-07-01 | 2016-11-23 | 陕西延长石油装备制造有限公司 | A kind of multifunctional pumping rod fisher and method of work thereof |
| CN112145113A (en) * | 2019-06-28 | 2020-12-29 | 中国石油天然气股份有限公司 | Fishing device |
| CN111894565A (en) * | 2020-07-14 | 2020-11-06 | 中煤科工开采研究院有限公司 | Device for testing crack expansion in surrounding rock |
| CN111894565B (en) * | 2020-07-14 | 2024-03-22 | 中煤科工开采研究院有限公司 | Device for testing crack expansion in surrounding rock |
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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: 20100324 Termination date: 20100531 |