Mandrel of a rotary guiding tool guiding mechanism

Abstract

The invention discloses a rotating guide tool guide mechanism mandrel. The rotating guide tool guide mechanism mandrel comprises a guide mechanism mandrel body, a primary electronic bin, a mud via flow threading support seat and a variable-length adapter head, wherein the guide mechanism mandrel body, the primary electronic bin, the mud via flow threading support seat and the variable-length adapter head are coaxially connected in sequence. The primary electronic bin, the mud via flow threading support seat and the variable-length adapter head are mutually connected and are arranged in the guide mechanism mandrel body. Male and female pin holes are formed between the end portion, connected with the mud via flow threading support seat, of the primary electronic bin and the guide mechanism mandrel body. The rotating guide tool guide mechanism mandrel is simple in structure and more convenient to assemble and disassemble. The internal space of the primary electronic bin is enlarged to themaximum extent. The length of the primary electronic bin and the length of the spindle are shortened. The overall rigidity of the drilling tool is reduced. The assembly form of a drilling tool is optimized. The deflecting capability of an instrument is improved.

Description

technical field [0001] The invention relates to an oil drilling downhole testing instrument, in particular to a mandrel of a guiding mechanism of a rotary steering tool. Background technique [0002] Rotary steerable drilling tools are currently the most advanced oil drilling equipment in the world, and are monopolized by a few oil service companies in developed countries. At present, the rotary steerable tools independently developed in China have insufficient deflection capability during drilling, which makes it impossible to meet tasks such as shale gas exploitation. In order to strengthen the deflection capability of the self-developed rotary steerable, it is necessary to reduce the stiffness of the instrument, shorten the length, and optimize the drilling tool combination. Most of the domestically developed rotary steerable systems are of the push-back type. A mandrel passes through the non-rotating jacket to transmit the drill pressure and torque to the drill bit, and...

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a mandrel of the guiding mechanism of the rotary guiding tool, which changes the electrical connection form of the existing instrument drilling tool outer wall through the conductive ring, and changes it to the central probe type connection mode, and at the same time, the upper electronic warehouse still adopts the The central water eye method solves the following problems:

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