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overshot

An overshot and outer sleeve technology, applied in the field of tools and overshots, can solve the problems of restricting the progress of the project and the time limit of construction, the force fracture of the cable, the complication of accidents, etc. The effect of salvage ability

Active Publication Date: 2018-09-04
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] The overshot of the present invention has an overall structure such as figure 1 As shown, it includes a connecting rod 1, the connecting rod 1 is sleeved with a bidirectionally slidable outer sleeve 2, and the end of the connecting rod 1 is provided with a group of radially openable and closeable pawls 3. When the outer sleeve 2 is away from When the pawl 3 moves in the direction, the pawl 3 can be disengaged from the inner cavity 4 of the outer sleeve 2 and open, and when the outer sleeve 2 moves in the direction of the pawl 3, the pawl 3 can be closed and stored in the outer sleeve 2 in the lumen 4. Its opening and closing process is as 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 self-weight. The overshot can conveniently and quickly salvage the falling objects of oil and gas drilling and exploitation. Compared with the existing conventional overshot, the overshot o...

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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 an overshot used for salvaging the falling objects in the well during the drilling and production process, and belongs to the technical field of drilling and production equipment. Background technique [0002] In the process of drilling and production of oil and gas, more complicated operations are required, and the falling objects are also unavoidable in the process of drilling and production. Falling objects mainly include cables (such as cables, steel wires, steel ropes), etc. [0003] In the salvage process of the falling objects in the prior art, the fishing device is provided with a fixed pawl connecting rod at one end, and the cable-like falling objects are picked up by lowering the fishing device. Due to the deep well condition, the salvage situation cannot be observed, and the position of the falling objects can only be judged by the operator's slight cha...

Claims

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Application Information

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