Inner core type small diameter resistivity measuring instrument

Abstract

The invention discloses an inner core type small diameter resistivity measuring instrument. The inner core type small diameter resistivity measuring instrument comprises a circuit part and a mechanical part, wherein the circuit part comprises a measuring circuit board assembly, a conversion circuit board assembly, a control circuit board assembly, an amplification and signal processing circuit board assembly, a communication circuit and a clock battery, and the mechanical part comprises a circuit conversion joint, an antenna skeleton, an antenna shell, a winding antenna, a small button contact device, a measuring circuit shell, a fixing pin, an anti-rotation key, a measuring circuit outer barrel, a shock absorbing sealing device, a measuring circuit shell rear seat, a large button contact device, a measuring circuit outer transfer barrel, a control part outer barrel, a control part circuit shell, an overlying disc spring and a hanging-connecting joint. According to the inner core type small diameter resistivity measuring instrument, a well descending method is the same as a salvaging well descending method, that is, and the instrument is hung up with a well field pneumatic hoist and then is hung and lowered into a drill collar.

Description

technical field [0001] The invention belongs to the field of oil well geological parameter measurement, in particular to an inner core type small-diameter resistivity measuring instrument. Background technique [0002] With the rapid rise of the oil industry at home and abroad, wireless inclinometers while drilling have been developed and updated rapidly. Due to people's stricter requirements on oil extraction technology, in this environment, more than ordinary inclinometers have been produced. It is a more accurate and advanced wireless while-drilling instrument. This instrument can not only measure conventional parameters such as well inclination and azimuth downhole, but also measure geological parameters, such as resistivity while drilling, gamma while drilling, and Density, porosity while drilling, etc., and can also measure drilling engineering parameters, such as drilling tool torque while drilling, vibration parameters while drilling, and WOB while drilling. It can ...

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Problems solved by technology

The disadvantage of this drill collar measuring instrument is that it is too bulky, complicated to process, and high in cost. The general weight of the instrument is about 1.5 tons and the length is close to 10 meters. Not only is it inconvenient to transport, but it is also troublesome to go into the well

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