Self-locking slider-type salvage device

An overshot and locking technology, which is applied in wellbore/well parts, earthwork drilling, etc., can solve the problems of drilling tools and drilling rigs falling off, affecting the progress of the project, and complicated structures, so as to avoid rope vibration and equipment maintenance costs Low, simple structure effect

Pending Publication Date: 2019-07-05
陈天安
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  • Abstract
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AI Technical Summary

Problems solved by technology

[0002] During the construction of some bridges and highways, it is necessary to drill holes on the ground or underwater. During the drilling process of the drilling rig, the drilling tool often swings a lot due to geological reasons, causing accidents where the drilling tool and the drilling rig fall off. If the salvage is not timel

Method used

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  • Self-locking slider-type salvage device
  • Self-locking slider-type salvage device
  • Self-locking slider-type salvage device

Examples

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Example Embodiment

[0033] Combine Figure 1 to Figure 5 , To further explain the present invention:

[0034] A self-locking slider-type overshot includes an overshot body 2, a guide slider 8 and a locking mechanism 11. The overshot body 2 has a truncated cone structure as a whole, and a through hole 5 is provided in the middle of the overshot body 2 for locking The mechanism 11 is arranged in the through hole 5, the overshot body 2 is provided with a guide rail 7, which is arranged along the direction of the bus bar of the overshot body 2, and the guide slider 8 is slidably arranged on the guide rail 7. The outer side of the guide slider 8 Used to abut or separate from the inner wall of the central pipe 1 of the drill tool to be salvaged, the locking mechanism 11 automatically adjusts the force of the guide slider 8 to lock the central pipe 1 when the salvage device pulls the drilling tool upward; preferably, the guide The sliding block 8 is provided with a locking structure that cooperates with th...

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PUM

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Abstract

The invention relates to a slider-type salvage device with a locking mechanism. The slider-type salvage device comprises a salvage device body, a guiding slider and the locking mechanism; and a through hole is formed in the middle of the salvage device body, and the locking mechanism is arranged in the through hole. When the salvage device lifts a drilling tool to move upwards, the locking mechanism automatically enlarges locking force of the guiding slider for locking a center pipe, the locking force is provided by an air flow flowing through the interior of the through hole, and the lockingforce is dynamically adjusted along with change of the salvage speed; in the lowering process of the salvage device, the air flow flowing through the interior of the through hole provides braking force to prevent the locking mechanism from rotating under a non-locking state; and after salvage operation is completed, the locking mechanism can conduct unlocking through a special tool, and the purpose of recovering the salvage device is achieved.

Description

technical field [0001] The invention relates to the technical field of drilling tool fishing, in particular to a self-locking slider type fishing device. Background technique [0002] During the construction of some bridges and highways, it is necessary to drill holes on the ground or underwater. During the drilling process of the drilling rig, the drilling tool often swings a lot due to geological reasons, causing accidents where the drilling tool and the drilling rig fall off. If the salvage is not timely , it is bound to delay the entire construction period and affect the progress of the entire project. In the prior art, slider-type overshots have also appeared for such problems, but there are few records about slider-type overshots with locking mechanisms. Even if there are, the structure is complicated , more components are set. Contents of the invention [0003] The purpose of the present invention is to provide a self-locking slider type fisher, which fully utilize...

Claims

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Application Information

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IPC IPC(8): E21B31/18
CPCE21B31/18
Inventor 陈天安王金伟陈小蓉
Owner 陈天安
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