CN201087712Y - Hollow stem salvaging barrel - Google Patents
Hollow stem salvaging barrel Download PDFInfo
- Publication number
- CN201087712Y CN201087712Y CNU200720028649XU CN200720028649U CN201087712Y CN 201087712 Y CN201087712 Y CN 201087712Y CN U200720028649X U CNU200720028649X U CN U200720028649XU CN 200720028649 U CN200720028649 U CN 200720028649U CN 201087712 Y CN201087712 Y CN 201087712Y
- Authority
- CN
- China
- Prior art keywords
- cylinder
- scraping
- overshot
- hole
- claw
- 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 hollow rod overshot, which belongs to a device in the oil extraction production. The overshot has a cylinder body. The upper end of the cylinder body is provided with a tie-in, and the lower end is provided with a scraping cylinder, and a seat cylinder is arranged in the cylinder body. A spring is arranged at the upper side on the seat cylinder, and a grasping cylinder is arranged at the lower side of the seat cylinder. The upper part of the grasping cylinder is provided with a through hole, and the lower part is provided a plurality of jack catchses with cone-shaped outer surfaces. Slotted holes communicated with the through hole are arranged among each jack catchs. The inner surface of the jack catchs is provided with block teeth tilting upwards. The lower part of the tie-in is also provided with a correcting rod, and the lower part of the scraping cylinder is provided with scraping sheets. Because of the existence of the scraping sheets at the lower part of the scraping cylinder in the overshot, a broken rod fishing top can conveniently enter into the overshot, and the reliability and veracity of the salvaging are high. Time and salvaging cost are saved with reasonable structure, convenient manufacture and low production cost.
Description
Technical field
The utility model provides a kind of device of oil field oil recovery production usefulness, especially a kind of fishing device.
Background technology
In oil field oil recovery manufacturing process, the situation of polished rod fracture appears sometimes, need salvage with fishing device such as fishing socket.Existing fishing socket reasonable structure is poor, causes the reliability of salvaging low.When disconnected bar top of fish was close on the tubing wall, disconnected bar was difficult to enter in the fishing socket, and is more difficult to get access when especially disconnected bar top of fish position is dark, can only rely on specialty to salvage troop and salvage, and causes time, multiple loss economically.
Summary of the invention
Technical problem to be solved in the utility model is to provide a kind of hollow fishing socket, to improve the reliability of fishing.
The utility model is to realize like this, the hollow stem fishing socket, it has cylindrical shell, and the cylindrical shell upper end is equipped with joint, the lower end is equipped with and scrapes tube, and the seat tube is installed in the cylindrical shell, seat tube upside is equipped with spring, downside is equipped with and grabs tube, grabbing a top has through hole, bottom that the tapered claw of a plurality of external surfaces is arranged, and grooved hole communicates with through hole between each claw, the acclivitous latch of claw inner surface, also have righting rod below the joint, scraping a bottom is scraping blade.
Adopt the fishing socket of said structure, because the existence of the scraping blade of scraping a bottom is arranged, disconnected bar top of fish is entered in the fishing socket easily, the reliability of salvaging, accuracy height have been saved time and salvage expenses, and rational in infrastructure, easily manufactured, and cost of production is low.
Description of drawings
Fig. 1 is the schematic diagram of the utility model structure.
Fig. 2 is that the A of Fig. 1 is to partial view.
The specific embodiment
Below in conjunction with description of drawings concrete structure of the present utility model.
As shown in drawings, the hollow stem fishing socket of the utility model, it has cylindrical shell (4), the cylindrical shell upper end is equipped with joint (1), the lower end is equipped with and scrapes tube (7), seat tube (5) is installed in the cylindrical shell, seat tube upside is equipped with spring (2), downside is equipped with and grabs tube (6), grabbing a top has through hole (6-1), bottom that the tapered claw of a plurality of external surfaces (6-3) is arranged, grooved hole between each claw (6-4) communicates with through hole, the acclivitous latch of claw inner surface (6-2), also have righting rod (3) below the joint, scraping a bottom is scraping blade (7-1).
Scraping blade the thinnest bottom thickeied gradually and shortens gradually along outer wall.
During use, this fishing socket is linked together by externally threaded termination of being with of joint top (1-1) and fishing string.Transfer this fishing socket, when running into disconnected bar top of fish, the tube bar that will break of scraping on the fishing socket blows in the tube.Move down, disconnected bar top of fish enters rapidly in the claw under the guide effect of scraping an inwall, makes to grab on the tube and moves again, and spring is compressed, and each claw opens, and the bar top of fish that will break is clipped in the claw.When carrying on the fishing socket, spring opens, produce thrust through the seat tube to grabbing tube, because the claw external surface is tapered, scraping under the restriction of tube inner surface, claw produces radially pressure to disconnected bar top of fish, under the acting in conjunction of the latch of claw inner surface, the bar top of fish that will break is tightly clamped, until being suggested ground.
Righting rod plays centralizing function, with the accuracy and the operating efficiency of further raising fishing.
Claims (1)
1. hollow stem fishing socket, it is characterized in that, it has cylindrical shell (4), the cylindrical shell upper end is equipped with joint (1), the lower end is equipped with and scrapes tube (7), seat tube (5) is installed in the cylindrical shell, seat tube upside is equipped with spring (2), downside is equipped with and grabs tube (6), grabbing a top has through hole (6-1), bottom that the tapered claw of a plurality of external surfaces (6-3) is arranged, grooved hole between each claw (6-4) communicates with through hole, the acclivitous latch of claw inner surface (6-2), also have righting rod (3) below the joint, scraping a bottom is scraping blade (7-1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU200720028649XU CN201087712Y (en) | 2007-10-04 | 2007-10-04 | Hollow stem salvaging barrel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU200720028649XU CN201087712Y (en) | 2007-10-04 | 2007-10-04 | Hollow stem salvaging barrel |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201087712Y true CN201087712Y (en) | 2008-07-16 |
Family
ID=39635305
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU200720028649XU Expired - Fee Related CN201087712Y (en) | 2007-10-04 | 2007-10-04 | Hollow stem salvaging barrel |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201087712Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104989311A (en) * | 2015-07-15 | 2015-10-21 | 中国石油集团西部钻探工程有限公司 | Sliding rail type fishing device |
-
2007
- 2007-10-04 CN CNU200720028649XU patent/CN201087712Y/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104989311A (en) * | 2015-07-15 | 2015-10-21 | 中国石油集团西部钻探工程有限公司 | Sliding rail type fishing 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 |