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Fisher

An overshot and detent technology, which is applied in the field of drilling and production equipment, can solve the problems of restricting the progress of the project and construction time, the force and fracture of the cable, and the complication of accidents, so as to achieve the controllable salvage process, improve the success rate, and improve the salvage ability. Effect

Active Publication Date: 2016-05-11
廖雄
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The design of the pawl of the overshot makes it easier to fall in the falling objects, but this often results in knots of too many cables wrapped around the pawls of the overshot, and it takes time and effort to pull out the fallen objects, and even The cable broke due to excessive force during the salvage process, complicating the incident and necessitating another salvage operation
[0004] The above-mentioned traditional overhaul and the problems in the salvage process make the existing overhaul process time-consuming and laborious, which seriously restricts the progress of the project and the construction time limit

Method used

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Embodiment

[0036] Overshot of the present invention, its overall structure is as figure 1 As shown, it includes a connecting rod 1, which is covered with an outer sleeve 2 that can slide in both directions. The end of the connecting rod 1 is provided with a set of pawls 3 that can be opened and closed radially. When the outer sleeve 2 moves away from When the ratchet 3 moves in the direction, the ratchet 3 can be disengaged from the inner cavity 4 of the outer sleeve 2 and opened, and when the outer sleeve 2 moves in the direction of the ratchet 3, the ratchet 3 can be closed and stored in the outer sleeve 2 in the lumen 4. Its opening and closing process is as follows: Figure 4 , Figure 5 , Image 6 shown.

[0037] The outer sleeve 2 of this embodiment adopts a thick-walled design and has a relatively large dead weight. The overshot can conveniently and quickly fish out the well falling objects of oil and gas drilling and production. Positioning and judgment of falling objects i...

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PUM

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Abstract

The invention discloses a tool for a drilling and production process, especially a fisher for fishing downhole objects in the drilling and production process, belonging to the technical field of drilling and production equipment. The fisher comprises a connecting rod, wherein a two-way slidable outer sleeve is sleeved on the connecting rod, and a group of radially openable pawls are arranged at the end of the connecting rod. When the outer sleeve moves away from the pawls, the pawls can depart from a cavity of the outer sleeve and open; and when the outer sleeve moves to the pawls, the pawls close and are contained in the cavity of the outer sleeve. The fisher disclosed by the invention is capable of fishing a downhole rope form object conveniently and quickly in oil and gas drilling production by the gravity action of the outer sleeve.

Description

technical field [0001] The invention relates to a tool in the drilling and production process, in particular to a fishing device used for salvaging well falling objects in the drilling and production process, and belongs to the technical field of drilling and production equipment. Background technique [0002] In the process of oil and gas drilling and production, more complicated operations are required, and downhole falling objects are also inevitable in the process of drilling and production. Falling objects mainly include cables (such as cables, steel wires, steel ropes), etc. [0003] In the process of salvaging fallen objects in the prior art, one end of the overshot is provided with a fixed pawl connecting rod, and the cable-like fallen objects are caught by lowering the overshot. Due to the deep well conditions, it is impossible to observe the salvage situation, and the position of the falling object can only be judged by the operator's slight changes in the ground ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B31/18
CPCE21B31/18
Inventor 廖雄
Owner 廖雄
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