CN2203712Y - Super magnetic overshot - Google Patents
Super magnetic overshot Download PDFInfo
- Publication number
- CN2203712Y CN2203712Y CN 94217241 CN94217241U CN2203712Y CN 2203712 Y CN2203712 Y CN 2203712Y CN 94217241 CN94217241 CN 94217241 CN 94217241 U CN94217241 U CN 94217241U CN 2203712 Y CN2203712 Y CN 2203712Y
- Authority
- CN
- China
- Prior art keywords
- fisher
- base plate
- super magnetic
- well
- utility
- 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
Links
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- Earth Drilling (AREA)
Abstract
The utility model relates to a salvaging tool used for dropped objects in wellbores during drilling various engineering wells, characterized in the adoption of rare-earth super-strong ferromagnetic materials, the open magnetic sheet of the salvaging tool and large structural size which are suitable for salvaging dropped objects in large wellbores during drilling engineering wells.
Description
The utility model relates to a kind of magnetic fishing tool that is used to salvage junk in the well, particularly salvages junk in the hydrology, geology, engineering well-drilling borehole.
Background technology of the present utility model is: at present, both at home and abroad in oil drilling, have a kind of size-constrained system, diameter is little, and magnetic material is contained in the magnetic fishing tool of utensil inner chamber, it is little to salvage the junk size, can not surpass the fisher inner cavity size.Therefore, at the engineering pile foundation well bore intraocular of big hole, can't salvage massive junk.
Purpose of design of the present utility model is to take into full account up till now that big hole pile foundation drilling engineering constantly increases, junk is complex-shaped in the well, the size that has is very big, very heavy or very wide, therefore design by the condition of existing field boundary operation a kind of be adapted to any kind, the theoretical maximum magnetic attraction reaches the 100KN(10 ton), and press actual needs, increase and decrease magnet steel quantity, can make the fisher of various magnetic attraction grades.
Design scheme of the present utility model is: in order to solve the salvaging of junk in the big hole.1, adopted rare earth super ferromagnetic material (5), can dispose from 1 group to 40 groups various forms; 2, the thickness of ferromagnetic material back side cushion block (6) can be measure-alike or inequality on same magnetic fishing tool, to adapt to the shape in shaft bottom; 3, base plate (3) and mud cover (4) are that can to make according to actual needs from diameter be that 100mm is to the 1000mm various sizes; 4, the joint of jointed rod (1) can be screw thread also can be flange, to adapt to the requirement of various drilling rods; 5, structural concept: a kind of super magnetic fishing tool; ferromagnetic material (5) is positioned on the base plate (3) of fisher by cushion block (6); the main body of fisher is solidified as a whole with base plate (3) and mud cover (4) by the joint (1) of top band drill rod thread; the lever (8) of intrinsic some protection magnet around the base plate bottom; be connected with fisher top sub (1) with drilling rod in the well, and can inject mud by eyelet (2) from the drilling rod inner chamber.Two eyelets flow out to the upward some eyelets of base plate (3) slurry channel of the present utility model (2) to the central tube bottom by joint (1), form the mud circulation path.
Operating principle of the present utility model: general junk all is the metal hard material that can be held by magnet in the well, because materials such as softer timber, plastics fall in the well to fall with bit drills.Can use super magnetic fishing tool of the present utility model for hard iron and steel material, junk be held drag for well head.Carry out smoothly for the ease of the magnetic force fishing, drilling rod can inject mud during salvaging, and by fisher mud circulation path, at the bottom of the flushing manhole, after rinsed well in the shaft bottom, the magnetic force fishing carried out convenient more and is easy to once salvage success.
The utility model is compared with background technology, the one, this device solves the salvaging of junk in the big hole, avoid owing to salvage less than big iron and steel junk, cause well to scrap, the 2nd, owing to be used in ferromagnetic material, not only simple and compact for structure, ferromagnetic attraction force is big, it is reliable to use, and operation easily, and the 3rd, the structure of this device is applicable to fishing junk in the various wells of various engineerings.
Description of drawings:
Fig. 1 is a structural representation of the present utility model
1 pair of the utility model is done with narration in conjunction with the accompanying drawings:
Ferromagnetic material (5) installs on the base plate (3) of fisher with the cushion block (6) of screw (7) by various different-thickness; the joint (1) of the main body top band drill rod thread of fisher and base plate (3) and mud cover (4) are welded together, around the base plate bottom and be welded with the lever (8) of some protection magnet.Be connected with the top sub (1) of fisher with drilling rod in the well, can inject mud by eyelet (2) from the drilling rod inner chamber in case of necessity, at the bottom of flushing manhole, so that salvage junk in cleaner shaft bottom.
Claims (2)
1, a kind of super magnetic fishing tool; it is characterized in that: ferromagnetic material (5) is positioned on the base plate (3) of fisher by cushion block (6); the main body of fisher is solidified as a whole in base plate (3) and mud cover (4) with the joint (1) of top band drill rod thread, the lever (8) of intrinsic some protection magnet around the base plate top.
2, super magnetic fishing tool according to claim 1 is characterized in that: be connected with fisher top sub (1) with drilling rod in the well, and can inject mud by eyelet (2) from the drilling rod inner chamber.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 94217241 CN2203712Y (en) | 1994-07-16 | 1994-07-16 | Super magnetic overshot |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 94217241 CN2203712Y (en) | 1994-07-16 | 1994-07-16 | Super magnetic overshot |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2203712Y true CN2203712Y (en) | 1995-07-19 |
Family
ID=33832741
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 94217241 Expired - Fee Related CN2203712Y (en) | 1994-07-16 | 1994-07-16 | Super magnetic overshot |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2203712Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108412460A (en) * | 2018-03-22 | 2018-08-17 | 中国石油集团川庆钻探工程有限公司长庆钻井总公司 | A kind of device of wellhead anti-falling |
| CN112761563A (en) * | 2021-01-27 | 2021-05-07 | 中煤科工集团西安研究院有限公司 | Special electromagnetic salvage device for electromagnetic salvage system of large-diameter engineering well |
-
1994
- 1994-07-16 CN CN 94217241 patent/CN2203712Y/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108412460A (en) * | 2018-03-22 | 2018-08-17 | 中国石油集团川庆钻探工程有限公司长庆钻井总公司 | A kind of device of wellhead anti-falling |
| CN112761563A (en) * | 2021-01-27 | 2021-05-07 | 中煤科工集团西安研究院有限公司 | Special electromagnetic salvage device for electromagnetic salvage system of large-diameter engineering well |
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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 |