CN2534360Y - Downhole mechanical fishing spear - Google Patents
Downhole mechanical fishing spear Download PDFInfo
- Publication number
- CN2534360Y CN2534360Y CN 02213119 CN02213119U CN2534360Y CN 2534360 Y CN2534360 Y CN 2534360Y CN 02213119 CN02213119 CN 02213119 CN 02213119 U CN02213119 U CN 02213119U CN 2534360 Y CN2534360 Y CN 2534360Y
- Authority
- CN
- China
- Prior art keywords
- fishing
- pawl
- joint
- drag
- hole mechanical
- 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 downhole mechanical fishing spear used for petroleum industry which is applicable for off operation and fishing hanging operation process of a downhole string, a packer, and other equipments. The downhole mechanical fishing spear of the utility model consists of a working barrel and a joint which are used cooperately. The working barrel is connected with a bottom end of a pipe string. The joint is connected to a top of a borehole string which needs a fishing spear or a tool. The working barrel consists of a top joint, a fishing claw and a protecting jacket. The top joint is connected with the fishing claw. The joint consists of a head and a fishing rod. The fishing rod is equipped on the head. The downhole mechanical fishing spear of the utility model saves payment of vehicle labor services without pumping vehicle and other vehicles for cooperately working, saves working hour, has a low sealing requirement for string, generates no fishing failure phenomenon with an oil pipe leakage, and reduces production cost and worker labor intensity.
Description
Technical field
The utility model belongs to the downhole production special tool of petroleum industry, and particularly a kind of down-hole mechanical is given up, and is applicable to that the separating operation and the salvaging of equipment such as down-hole string, packer and instrument articulates operation technique.
Technical background
Under the conventional well of the down-hole string of petroleum industry and underground equipment, give up in the operation, generally the releasing tool of Cai Yonging is that hydraulic pressure is given up, hydraulic releasing tool need be cut off pin by the highly pressurised liquid of pump truck, finishes the technology of giving up, and has increased the labour cost and the time to wait of vehicle.When the tubing string seepage, a hydraulic pressure is given up to construct the failure possibility is arranged, and the construction of giving up of failure can not be fished for the tubing string and the instrument of giving up in the well simultaneously, must carry out fishing by the special-purpose fishing tool of changing-over.
Summary of the invention
The purpose of this utility model is to make a kind of down-hole mechanical to give up, overcome hydraulic pressure give up the expense height, the efficient that exist low, tubing string is required the defective of standard strictness, finish respectively with one-trip string and give up and salvage two kinds of operations.Realize low cost, high benefit and easy and simple to handleization given up in the down-hole, reduce production costs and working strength of workers.
The present technique solution can reach above-mentioned purpose: the utility model is made up of give up seating nipple and down-hole mechanical back-off sub of down-hole mechanical, the down-hole mechanical seating nipple of giving up is connected in the bottom of running string, the down-hole mechanical back-off sub is connected in the top of interior tubing string of the well that need give up or instrument, and both are used.Down-hole mechanical give up seating nipple by top connection, drag for pawl and sheath is formed, top connection with drag for pawl and be connected.The down-hole mechanical back-off sub is by joint and drag for bar and form, and drags for bar and is loaded on the joint.
The utility model is compared with the existing hydraulic pressure technology of giving up and had the following advantages: 1, the machinery vehicles such as not needing pump truck of giving up cooperates, and saves the expenditure of vehicle labor service.2, simple to operate, save man-hour, adopt the mode of up and down tubing string and rotation tubing string to finish respectively that down-hole string is given up and salvaging articulates during operation.3, low to the sealing performance requirement of tubing string, the phenomenon of giving up and failing because of the oil pipe leakage can not appear.4, the seating nipple of giving up can be repeatedly used, and promptly is the seating nipple of giving up, and is again the fishing socket of giving up, and can finish respectively with one-trip string and give up and salvage two kinds of operations, and use cost is low, has reduced cost of production and working strength of workers.5, it is wide to fish for when giving up the instrument range of choice.
Description of drawings
Accompanying drawing 1 is the give up structural representation of seating nipple of the utility model down-hole mechanical.
Accompanying drawing 2 is the structural representation of the utility model down-hole mechanical back-off sub.
The specific embodiment
Below in conjunction with embodiment the utility model is done further detailed description: with reference to accompanying drawing 1-2, the utility model is made up of give up seating nipple and down-hole mechanical back-off sub of down-hole mechanical.Down-hole mechanical give up seating nipple by top connection 1, drag for pawl 2 and sheath 3 is formed, top connection 1 with drag for pawl 2 and be connected.Drag for pawl 2 and be cylindrical body, the top external diameter has step, the above machining screw of step; Processing axial trajectory groove on the middle cylinder is communicated with the oblique rail groove of processing in the top of axial trajectory groove, and extends to the bottom in the middle and lower part of oblique rail groove and be processed as fan-shaped opening, is convenient to the uncoupling of mechanical back-off sub.The two ends internal diameter of top connection 1 is equipped with screw thread, and the upper end screw thread is connected with running string, the lower end screw thread with drag for pawl 2 and be connected, drag for the outside of pawl 2 sheath 3 be installed.The down-hole mechanical back-off sub is by joint 4 and drag for bar 5 and form, and drags for bar 5 and is loaded on the joint 4, and the diameter that drags for bar 5 is less than dragging for the axial trajectory groove on the pawl 2 and the width of oblique rail groove.Joint 4 is a cylindrical body, and its upper-end inner diameter and lower end external diameter are all established screw thread, and external diameter is less than the internal diameter that drags for pawl 2; The internal thread on top and middle through hole are used in selects other fishing tool when fishing for, widen the range of choice of fishing tool.The external screw thread of bottom and tubing string or the tool equipment that need give up link.The installation site correspondence of dragging for bar 5 is dragged for the design attitude of axial trajectory groove on the pawl 2, drags for bar 5 and is used to drag for and grabs and articulate seating nipple.During on-the-spot the use, the seating nipple of giving up of the present utility model is connected in the lower end of tubing string, back-off sub is connected in the top of tubing string in the well that need give up or instrument, and back-off sub is mounted in the axial trajectory groove that drags for pawl 2 in the seating nipple of giving up, down to projected depth.Give up and set up fulcrum at the borehole wall or shaft bottom with lower tubular column, anchor packer etc., make the utility model be in the middle chalaza of tubing string when giving up, the bar 5 that drags in down-hole mechanical back-off sub this moment is positioned at the down-hole mechanical seating nipple of giving up and drags for the top dead-centre of the axial trajectory groove of pawl 2, the rotation tubing string is carried simultaneously, the bar 5 that drags in the back-off sub is deviate from along oblique rail groove, finishes the technology of giving up.When fishing for the bottom tubing string, with the top of seating nipple of giving up down to back-off sub, continue to transfer tubing string, the seating nipple of giving up is inserted in back-off sub, drag for the top dead-centre of bar 5 oblique rail groove arrival axial trajectory groove in the guiding lower edge of the fan-shaped opening of seating nipple of giving up, the upper lifting pipe post is finished fishing process.
Claims (5)
1, the down-hole mechanical seating nipple of giving up, it is characterized in that down-hole mechanical give up seating nipple by top connection (1), drag for pawl (2) and sheath (3) is formed, top connection (1) with drag for pawl (2) and be connected.
2, the down-hole mechanical according to claim 1 seating nipple of giving up is characterized in that dragging for pawl (2) and is cylindrical body, and the top external diameter has step, the above machining screw of step; Processing axial trajectory groove on the middle cylinder is communicated with the oblique rail groove of processing in the top of axial trajectory groove, and extends to the bottom in the middle and lower part of oblique rail groove and be processed as fan-shaped opening.
3, the down-hole mechanical according to claim 1 seating nipple of giving up is characterized in that the two ends internal diameter of top connection (1) is equipped with screw thread, the lower end screw thread with drag for pawl (2) and be connected, drag for the outside of pawl (2) sheath (3) be installed.
4, down-hole mechanical back-off sub is characterized in that the down-hole mechanical back-off sub by joint (4) with drag for bar (5) and form, drags for bar (5) and be loaded on the joint (4).
5, down-hole mechanical back-off sub according to claim 4 is characterized in that joint (4) is cylindrical body, and its upper-end inner diameter and lower end external diameter are all established screw thread, and outer dia is less than the internal diameter that drags for pawl (2); Drag for the installation site correspondence of bar (5) and drag for the design attitude that pawl (2) is gone up the axial trajectory groove.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02213119 CN2534360Y (en) | 2002-03-02 | 2002-03-02 | Downhole mechanical fishing spear |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02213119 CN2534360Y (en) | 2002-03-02 | 2002-03-02 | Downhole mechanical fishing spear |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2534360Y true CN2534360Y (en) | 2003-02-05 |
Family
ID=33692677
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 02213119 Expired - Fee Related CN2534360Y (en) | 2002-03-02 | 2002-03-02 | Downhole mechanical fishing spear |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2534360Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101761332B (en) * | 2010-01-10 | 2013-01-30 | 蓝鲁哲 | Up-running-proof pipe string sealing check device |
| CN103184842A (en) * | 2011-12-29 | 2013-07-03 | 安东石油技术（集团）有限公司 | Hydraulic suspension packer disconnecting tool and disconnecting method |
| CN103939049A (en) * | 2013-01-22 | 2014-07-23 | 中国石油天然气股份有限公司 | Shaft falling object preventing device |
-
2002
- 2002-03-02 CN CN 02213119 patent/CN2534360Y/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101761332B (en) * | 2010-01-10 | 2013-01-30 | 蓝鲁哲 | Up-running-proof pipe string sealing check device |
| CN103184842A (en) * | 2011-12-29 | 2013-07-03 | 安东石油技术（集团）有限公司 | Hydraulic suspension packer disconnecting tool and disconnecting method |
| CN103184842B (en) * | 2011-12-29 | 2015-12-16 | 安东石油技术（集团）有限公司 | Hydraulic suspension packer releasing tool and method of giving up |
| CN103939049A (en) * | 2013-01-22 | 2014-07-23 | 中国石油天然气股份有限公司 | Shaft falling object preventing device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |