Casting-fishing tool with strength-sensing position

Abstract

The invention discloses a casting-fishing tool with strength-sensing position, comprising a cylindrical tube body provided with a first, second and third flanges at intervals; a slot hole is arranged between the second and third flanges and is internally provided with a cam, the cam is provided with a start end part and a tail end part provided with a sharp corner part, a stop part is arranged at the inside end face of the cam in a protruding mode, a trigger is arranged inside the first flange and is provided with a clamp edge on the side part, a first press spring is arranged between the clamp edge and the first flange, a steel wire penetrates through the closing end of the tube body to be connected with the trigger, a linkage post for controlling the start end part of the cam to butt is arranged below the clamp edge, a through slot is arranged below the third flange of the tube body, a support arm is eccentrically pivoted in the tube body along the though slot and is provided with a through hole, a slide seat is arranged between the support arm and the third flange, a second press spring is arranged between the slide seat and the third flange, and a trigger rod is arranged at the bottom end of the trigger and penetrates through the through hole of the support arm. According to the casting-fishing tool with strength-sensing position, accurate mechanical positioning is realized through spring preset force and the cam, and the casting-fishing requirements of large-sized injection mining tools can be met.

Description

technical field [0001] The invention relates to a special operation tool for oilfield water injection, in particular to a force-sensing positioning throwing and fishing tool used for throwing and fishing large-scale intelligent water distributors in wells. Background technique [0002] my country's layered water injection technology has achieved remarkable results in economic and effective development, sustained high and stable production, and improved water flooding recovery, and is at the leading level in the world. Developing layered water injection technology to achieve effective water injection and improve development results is an inevitable choice in the later stage of high water content development. For large-sized intelligent water distributors, the existing fishing method is to use steel pipe cables for fishing; however, this method has the following defects. On the one hand, steel pipe cables are particularly easy to damage, and at the same time, steel pipes are a...

AI Technical Summary

Problems solved by technology

For large-sized intelligent water distributors, the existing fishing method is to use steel pipe cables for fishing; however, this method has the following defects. On the one hand, steel pipe cables are particularly easy to damage, and at the same time, steel pipes are also required for shorting ground communication control. Cable winches cause equipment conflicts and inconvenient on-site connections; on the other hand, large-scale intelligent water distributors require a large fishing force, while steel pipe cables have low strength and cannot withstand large fishing forces

If a steel wire machine with a large fishing force is used for fishing, there will be problems such as inaccurate positioning or inability to achieve positioning, resulting in fishing failure

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