Underground while-drilling double-geological-parameter measuring instrument overall cascading method

Abstract

The invention discloses an underground while-drilling double-geological-parameter measuring instrument overall cascading method. An independent domestic turbine generator short joint and an independent domestic pulse generator short joint are used for replacing an imported integrated short joint of an imported turbine generator and an imported pulse generator, and the domestic pulse generator short joint is moved to the bottom from the overall cascading upper portion. The domestic turbine generator short joint, a directional measuring short joint, a gamma measuring short joint, a cavity wall conversion connector, a resistance rate short joint, a wall cavity conversion connector and the domestic pulse generator short joint are sequentially cascaded from top to bottom. By means of the underground while-drilling double-geological-parameter measuring instrument overall cascading method, the domestic short joint is used for replacing the imported short joint, and the instrument study cost is reduced; special maintenance equipment needing to be matched with the imported short joint is omitted, and the daily maintenance difficulty and use cost are lowered; the domestic pulse generator ishigh in adaptability to domestic well drilling liquid, and the service cycle is prolonged by nearly three times; and the instrument use rate is increased, low-cost running is achieved; and the requirement for oil drilling is met.

Description

technical field [0001] The invention relates to the technical field of petroleum drilling measurement, in particular to an integral serial connection method of downhole drilling-while-drilling dual geological parameter measuring instruments. Background technique [0002] In oil drilling, wellbore measurement is an important means to confirm formation lithology and evaluate oil and gas. The measurement-while-drilling instrument consists of two parts, the downhole and the surface, and the downhole part is composed of various functional sub-sections connected in series. Functional short joints are often divided into three categories. The first type is measurement short joints, such as directional measurement, gamma measurement, and resistivity measurement; the second type is power supply short joints, including turbine generators and lithium battery packs; the third type is Information sending section: There are pulse generators and electromagnetic wave generators. [0003] I...

AI Technical Summary

Problems solved by technology

Among them, the pulse generator is a vulnerable part and needs to be replaced frequently. Since the pulse generator and the turbine generator are bundled together, special supporting maintenance equipment is required, and its price is as high as one million

Therefore, daily maintenance is difficult and costly

The price of imported pulse generators is three times that of domestic ones, and the adaptability to domestic drilling fluids is poor, and the service life is short, most of which do not exceed 250 hours. It is difficult to meet the needs of low-cost and fast drilling

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