Guide claw release mechanism internally provided with transmission shaft

Abstract

The invention discloses a guide claw release mechanism internally provided with a transmission shaft. The guide claw release mechanism comprises a cylindrical base (1). A transmission shaft (2) is arranged in a central hole of the cylindrical base, a guide claw groove (3) is formed in the position, on one side of the transmission shaft, of the cylindrical base, and a guide claw (6) is arranged inthe guide claw groove; a cam groove (8) is formed in the position, above the guide claw, of the cylindrical base, and a cam (9) is arranged in the cam groove; a collision switch groove (11) and a transmission shaft groove (12) are formed in the cam, and a collision switch (13) is arranged in the collision switch groove; the collision switch is hinged with the cam through a collision switch pin, and a torsional spring (15) is arranged between the collision switch and the collision switch groove; and the transmission shaft penetrates through the transmission shaft groove. The guide claw releasemechanism is suitable for power transmission at the center position of the guide claw release mechanism, and can also be used for other similar structures needing to use the center position, such as pressure transmission at the center position and avoidance of certain parts at the center position.

Description

technical field [0001] The invention relates to a guide claw release mechanism provided with a drive shaft inside, and belongs to the technical field of downhole instrument structures. Background technique [0002] In oilfield water well testing work, many instruments need to eccentrically dock the eccentric arm of the instrument with the eccentric hole on the downhole tool, and the guide claw is the key mechanism to realize the guiding and docking of the instrument and the downhole tool. The basic principle and general structure of how the guide claw and the shoulder of the downhole tool realize rotary steering is a technology commonly used in oilfields. However, limited by various factors such as the outer diameter of the instrument and function settings, the existing guide claw release structure has the following disadvantages: [0003] The existing guide claw release mechanism is bulky and takes up a lot of space in the instrument; the remaining space of the instrument ...

AI Technical Summary

Problems solved by technology

[0004] The object of the present invention is to provide a guide claw release mechanism with a transmission shaft inside to solve the problems of the existing guide claw release mechanism, which are large in size, occupy a lot of equipment space, and the drive shaft cannot be arranged in the center, so as to overcome the problems existing in the prior art. lack of

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