Removable anti-blocking safety valve and special fishing tool for same

Abstract

The invention relates to petroleum machinery, in particular to a removable anti-blocking safety valve, which comprises a valve body (1) and a valve spool component (2). An anti-blocking cover (5) is arranged at the upper end of the valve spool component (2), an overflow hole (6) is arranged on the wall of the anti-blocking cover (5), and an elastic clamp (7) is sleeved outside the anti-blocking cover (5). A special fishing tool comprises a cable fixing portion (12) at the upper end and an unlocking fishing portion (13) at the lower end. The removable anti-blocking safety valve has the advantages of simple structure and convenience in disassembly and assembly, and can be rapidly removed by the special fishing tool when a downhole goes wrong, so that well repair efficiency is greatly improved, the process of disassembling and drilling for well repair is avoided, and the removable anti-blocking safety valve has a quite high economic significance.

Description

technical field [0001] The invention relates to petroleum machinery, in particular to a removable anti-blocking safety valve and a special fishing tool thereof. Background technique [0002] Safety valve is an essential tool in oil drilling. The currently used safety valve does not have the anti-blocking function. Once there is a problem downhole, it is very difficult to deal with the problem because the safety valve cannot be taken out. Usually, the only way to solve it is to dismantle the drill. If the drill cannot work for a few days at a time, it will take longer to restart the drill. Contents of the invention [0003] The technical problem to be solved by the present invention is to provide an anti-blocking safety valve and its special fishing tool that can be taken out without dismantling the drill. [0004] The technical solution of the present invention is: a removable anti-blocking safety valve, including a valve body and a valve core assembly inside, the valve ...

AI Technical Summary

Problems solved by technology

The safety valve currently used does not have the function of anti-blocking. Once there is a problem downhole, it is very difficult to deal with the problem because the safety valve cannot be taken out. Usually, the only solution is to dismantle the drill.

If the drill cannot work for a few days at a time, it will take longer to restart the drill

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