Anti-jarring reversing fishing spear

Abstract

The invention relates to an anti-jarring reversing fishing spear. The anti-jarring reversing fishing spear comprises a top connector, a spear rod threadedly connected with the top connector, and a spear tile arranged on the spear rod in a sleeve mode. The anti-jarring reversing fishing spear is characterized in that the spear rod and the top connector are fastened through an anti-twist pin, an auxiliary spring which is arranged on the spear rod in a sleeve mode is arranged between one end of the top connector and the spear tile, and a fishing spear base and a guide cone are arranged on the spear rod in a sleeve mode through threads. The anti-jarring reversing fishing spear has the advantages that the release mode between the fishing spear and the a falling drill string is changed to increase the operation functions of the fishing spear and to achieve the effect of long-time jarring and convenient reversing and releasing, so that resources are saved and the success rate of operation is improved. The anti-jarring reversing fishing spear can be widely applied to operation of drilling, well completion and well maintenance, solves the problems of resource backlogging due to fishing spears of different functional types, difficulties of tool selection of complex situations and large influences of subjective factors in an operation process, and can be preferably used for solving problems particularly in situation that the sticking reasons and sticking points of the underground falling drill string are not clear.

Description

technical field [0001] The invention belongs to the technical field of oil field workover tools, in particular to an anti-seismic knock-down buckle fishing spear. Background technique [0002] At present, in order to meet the continuity of operations and respond to unknown factors in the operation process, offshore oilfields often mobilize various types of fishing tools to the operation site, resulting in a backlog of fishing tool resources. Sometimes even if various types of fishing tools are prepared, it is still difficult to choose the appropriate tool for some problems where the situation of fish falling in the well is not very clear (type of stuck pipe, position of stuck point, etc.), and the operator's experience and analysis Subjective factors such as the ability to judge well conditions play a leading role in the selection of fishing tools. For wells with complex well conditions, there are often situations where the fish stuck in the well is not clear and the stuck ...

AI Technical Summary

Problems solved by technology

Through the forward rotation and release function of the spear base (multi-headed left-handed nut), it not only solves the difficulty of releasing the conventional spear under complex well conditions (such as long-term shocks) (the risk of slips being damaged and falling into the well due to strong release) and the inverted fishing spear Not suitable for problems such as jarring, but also improves fishing success and operability and reduces operational risk of spear tools

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