Power supply unit used for instrument for measurement while drilling

Abstract

The invention relates to a power supply unit used for an instrument for measurement while drilling. The power supply unit comprises an outer drum which can be in fixed connection with a drilling rod, a battery drum arranged in the outer drum in a sleeve connection manner and a battery pack arranged in the inner cavity of the battery drum, wherein an annular space is formed between the battery drum and the outer drum, a lead terminal is fixedly arranged on the battery pack, a conductive contact located at one end of the lead terminal is electrically connected with an electric connector, and a conductive contact located at the other end of the lead terminal is connected with the positive or negative electrode of the battery pack. The battery pack can move in the battery drum; when the battery pack is located at a first position, one end of the battery pack is isolated from the conductive contact located at the other end; and when the battery pack is located at a second position, one end of the battery pack is electrically connected with the conductive contact located at the other end. The power supply unit is easy to dismount and is safe and reliable.

Description

technical field [0001] The invention relates to the field of technical tools for oil field and mine development, in particular to a power supply device for a measuring-while-drilling instrument. Background technique [0002] The measurement-while-drilling tool is an important part of high-tech drilling. The application of these high-tech products can improve the engineering control ability, formation evaluation ability and ore seam drilling rate of extended-reach wells and difficult horizontal wells. Since the measurement-while-drilling instrument often includes mechanical, electrical, and hydraulic mechanical structures, its own structure is complex, and its shape is large and heavy. Therefore, the power requirement of the power supply is also very large. The power supply part of the measurement while drilling instrument is an important part to ensure the normal and stable operation of the downhole measurement tool. [0003] At present, in the prior art, a pin connection ...

AI Technical Summary

Problems solved by technology

[0004] However, this connection method is cumbersome to assemble on site

And when the drilling tool is working, because the battery pack is subject to strong vibration and impact, the pin connection is easy to break, resulting in short circuit or burning of the control circuit.

Moreover, it is time-consuming and laborious to assemble on site, and there are often accidents of improper human operation, damage to circuit connection pins and cables

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