Wired measurement and transmission motor for measurement while-drilling instrument

Abstract

The invention relates to a wired measurement and transmission motor for a measurement while-drilling instrument, which mainly solves the problems that a measurement parameter measuring point is far from a well bottom and high-quality communication is difficult to realize by adopting a wireless communication mode in the prior art. The wired measurement and transmission is characterized in that: a main measurement assembly I is arranged on a transmission shaft (1); a male slip ring (13) is placed in a short joint (16) of a male slip ring assembly; communicating axial holes are formed inside a shell D (8), a shell A (10), a stator tube shell (11), a shell B (12) and a step (14) of the male slip ring (13); the end faces of the shell D (8), the shell A (10), the stator tube shell (11), the shell B (12) and the step (14) of the male slip ring (13), corresponding to the axial holes, are provided with annular grooves (25); communication wires are placed in the axial holes; and conductive rings are placed in the annular grooves (25). The wired measurement and transmission motor has the characteristics of short distance between the measuring point and the well bottom and capability of realizing high-quality communication in a wired communication mode.

Description

Technical field: [0001] The invention relates to a measuring-and-transmitting motor used for downhole measuring instruments while drilling in oil wells, in particular to a wired measuring-and-transmitting motor for measuring-while-drilling instruments. Background technique: [0002] In oil drilling technology, the near-bit measurement system integrates drilling technology, logging technology and reservoir engineering technology, and uses near-drill geology, engineering parameter measurement and drilling control to ensure that the actual drilling hole passes through the reservoir and obtains the best results. It has the characteristics of identifying oil and gas layers while drilling and strong steering functions. The system can realize true geosteering. The measuring transmission motor is a key equipment of the system. At present, in the near-bit measurement system, the near-bit parameters are far away from the bottom of the well; it is difficult to realize the high-quality ...

AI Technical Summary

Problems solved by technology

At present, in the near-bit measurement system, the near-bit parameters are far away from the bottom of the well; it is difficult to realize the high-quality transmission of near-bit parameter data across the transmission motor

The main reason for this phenomenon is that the measuring transmission motor has the following disadvantages: 1. The main measuring housing is installed above the bending point of the motor, causing the measuring point to be far from the bottom of the well; 2. The communication between the main control and the receiving system near the drill bit The wireless method is greatly affected by the environment, and it is difficult to achieve high-quality communication

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