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Outer shell of instrument for well logging during drilling and instrument for well logging during drilling

A logging-while-drilling and instrument technology, which is applied to wellbore/well components, measurement, earthwork drilling and production, etc., can solve the problems of high drilling cost and environmental pollution, save drilling cost, ensure connection stability, and benefit The effect of environmental protection

Active Publication Date: 2018-08-03
杭州丰禾石油科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] Another object of the present invention is to propose a logging-while-drilling instrument to overcome the problems of high drilling cost and environmental pollution in traditional logging-while-drilling instruments

Method used

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  • Outer shell of instrument for well logging during drilling and instrument for well logging during drilling
  • Outer shell of instrument for well logging during drilling and instrument for well logging during drilling
  • Outer shell of instrument for well logging during drilling and instrument for well logging during drilling

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Embodiment Construction

[0025] The technical solutions of the present invention are further described below with reference to the accompanying drawings and through specific embodiments.

[0026] In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", The orientation or positional relationship indicated by "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying the indicated device. Or elements must have a particular orientation, be constructed and operate in a particular orientation, and therefore should not be construed as limiting the invention.

[0027] The casing of the LWD tool includes a casing with tapered threads. The tapered threads can be arranged on the inner surface of the casi...

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Abstract

The invention discloses an outer shell of an instrument for well logging during drilling and the instrument for well logging during drilling. The outer shell of the instrument for well logging duringdrilling comprises a housing with a tapered thread, a first strain sensor, a second strain sensor, a first comparison circuit and an alarm. The first strain sensor and the second strain sensor are arranged on the housing at an interval and are both disposed nearby the tapered thread; the distance between the first strain sensor and the tapered thread is smaller than the distance between the secondstrain sensor and the tapered thread; the first strain sensor and the second strain sensor are both connected to an input end of the first comparison circuit, and an output end of the first comparison circuit is connected to the alarm. According to the outer shell of the instrument for well logging during drilling, the instrument for well logging during drilling can be effectively prevented fromfalling off due to loose connection, the drilling cost can be saved, and protection of the environment is facilitated. According to the instrument for well logging during drilling applying the outer shell of the instrument for well logging during drilling, the oilfield drilling cost can be effectively saved, and protection of the environment is facilitated.

Description

technical field [0001] The invention relates to the field of oilfield logging, in particular to a casing of a logging-while-drilling instrument and a logging-while-drilling instrument. Background technique [0002] During oilfield drilling, drilling power such as weight on bit and torque are provided by the power system on the ground, and are transmitted to the bottom of the drilling tool through the thousands of meters of drill pipe, such as logging tools, steering tools and other logging while drilling tools, and finally reach the drill bit. . The multiple LWD instruments at the bottom are connected to other instruments connected up and down through the casings of the respective instruments. Specifically, tapered threads are provided on the inner surface or outer surface of the casing of the LWD instruments. They are connected by a taper thread locking connection. However, the long-distance power transmission of up to several kilometers is difficult to carry out stably a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B47/00E21B47/017
CPCE21B47/00E21B47/017
Inventor 徐涛周福昌李立伟邱海涛周建文马晓伟沈雄伟杨鑫李芳许林黄学平张凯许骞王生焕余智胜胡敏
Owner 杭州丰禾石油科技有限公司
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