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

A technology of geological parameters and series connection method, which is applied in the directions of measurement, earthwork drilling and production, wellbore/well components, etc., can solve the problems of low cost and fast drilling, poor adaptability of drilling fluid, and short service life, etc., to achieve Reduce the difficulty of daily maintenance and use cost, strong adaptability, and improve the effect of use efficiency

Inactive Publication Date: 2018-01-16
CNPC BOHAI DRILLING ENG
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  • Abstract
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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

Method used

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

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Embodiment Construction

[0010] Below in conjunction with accompanying drawing and specific embodiment the present invention is described in further detail:

[0011] Such as figure 1 As shown, the overall serial connection method of the downhole drilling dual geological parameter measuring instrument of the present invention uses an independent domestic turbine generator sub-section and a domestic pulse generator sub-section to replace the integrated sub-section of the imported turbine generator and pulse generator , and move the domestic pulse generator sub-section from the upper part of the overall series connection to the bottom. The sequence from top to bottom is: domestic turbine generator sub-section D1, directional measurement sub-section D2, gamma measurement sub-section D3 , Cavity wall adapter J1, resistivity nipple D4, wall cavity adapter J2, domestic pulse generator nipple D5.

[0012] The overall serial connection structure and main functions of the present invention are as follows:

[...

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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...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B49/00E21B47/18F03B13/02
CPCY02B10/50
Inventor 周文君吴章武成萍刘勋才李冬蕾
Owner CNPC BOHAI DRILLING ENG
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