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An electromagnetic wave measurement-while-drilling system release and recovery extension line device

A technology of measurement while drilling and electromagnetic waves, which is applied in the field of geological and mineral drilling and petroleum, which can solve the problems of complicated operation and aggravate the operation intensity of workers, and achieve the effects of improving the measurement depth, convenient and fast fixing, and easy processing

Inactive Publication Date: 2015-09-16
CHINA UNIV OF GEOSCIENCES (WUHAN)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, as the depth of the well increases, if the transmission depth of the signal is to be increased, the number of drill pipes that the armored cable must pass through will also increase, making the operation complicated and increasing the operating intensity of the workers.

Method used

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  • An electromagnetic wave measurement-while-drilling system release and recovery extension line device
  • An electromagnetic wave measurement-while-drilling system release and recovery extension line device
  • An electromagnetic wave measurement-while-drilling system release and recovery extension line device

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Embodiment Construction

[0015] The electromagnetic wave measurement-while-drilling system provided by the present invention puts in and recovers the extension line device including a spearhead and a spearhead sleeve (such as figure 1 shown), the spearhead is located in the spearhead sleeve during work. Such as figure 2 As shown, the spearhead includes a spearhead shell 1, an insulating sleeve 2, an arrow-shaped conductor core 2, a thread A5 and a seal 4, and the seal 4 and the thread A5 are located at the lower part of the spearhead shell 1 and are used to connect the spearhead For the lower part, the middle part of the spear head shell 1 is a through hole, the top is conical, and the lower end is connected to the probe tube through the seal 4 and the thread 5; the insulating sleeve 2 is made of a machinable electrical insulating material, and the center of the insulating sleeve 2 It is a through hole, which is fixed on the inner wall of the spearhead shell by screw connection; the arrow part of th...

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Abstract

The invention provides a putting and recovering extension cord device for an electromagnetic wave measurement while drilling system. The device comprises a spearing head and a spearing head sleeve, wherein the spearing head comprises a spearing head shell, an insulation sleeve, an arrow-shaped conductor core, a thread A and a sealing element; the thread A and the sealing element are used for connecting parts below the spearing head; and the spearing head sleeve comprises a cylindrical conductor core, a sleeve, an insulation barrel, a water-proof rubber gasket, a drain hole and a spring sheet. Compared with the prior art, the putting and recovering extension cord device for the electromagnetic wave measurement while drilling system has the advantages of simple structure, easiness in processing and low construction price, a fixed tray on a lead tail end can be conveniently, quickly and fixedly arranged on a drill column nearer a well mouth, the intensity of an accepted signal is enhanced, and the measurement depth can be effectively improved.

Description

technical field [0001] The invention relates to a device for releasing and recovering an extension line of an electromagnetic wave measurement-while-drilling system, which belongs to the field of petroleum and geological and mineral drilling. Background technique [0002] The electromagnetic wave measurement while drilling system has been paid more and more attention because it is not affected by the performance of drilling fluid. At present, the transmitting end of the electromagnetic wave while drilling system passes through the insulating short joint through the armored cable, and is connected to the upper drill string through the fixed tray at the end of the lead wire, so as to realize the current loop between the upper drill string, the formation and the lower drill string. And then realize the transmission of electromagnetic wave signal. However, as the depth of the well increases, if the transmission depth of the signal is to be increased, the drill pipes that the ar...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21B31/20E21B47/00
Inventor 付信信邵春陈鹏飞徐林
Owner CHINA UNIV OF GEOSCIENCES (WUHAN)
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