Underground magnetic marker positioning and pointing tool

A technology of positioning and pointing, magnetic marking, applied in the direction of construction, etc., can solve the problems of fiber cutting, unable to avoid fiber accurately, irregular twist of casing, etc.

Active Publication Date: 2019-08-16
CHONGQING UNIVERSITY OF SCIENCE AND TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the long-distance lowered casing will be irregularly twisted, so that the actual direction and position of the optical fiber in the wellbore are inconsistent with the preset situation, and the position of the optical fiber cannot be accurately avoided during subsequent perforation operations, and the optical fiber may be cut off. risk

Method used

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  • Underground magnetic marker positioning and pointing tool
  • Underground magnetic marker positioning and pointing tool
  • Underground magnetic marker positioning and pointing tool

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Embodiment Construction

[0030] The present invention will be further described below in conjunction with the embodiments and accompanying drawings.

[0031] Such as Figure 1 to Figure 7 As shown, a downhole magnetic marker positioning and pointing tool includes a support part, the support part is provided with a gravity eccentric assembly, and the gravity eccentric assembly is provided with a marking assembly 3;

[0032] The gravity eccentric assembly includes a hoisting shaft 1b, which is horizontally installed on the support part, and an eccentric weight plate 1c is arranged under the hoisting shaft 1b, and the eccentric weight plate 1c is suspended on the hoisting shaft 1b , the upper surface of the eccentric weight plate 1c is fixed with two lifting lugs 1d, the two lifting lugs 1d are distributed along the length direction of the lifting shaft 1b, and the two lifting lugs 1d are respectively installed on the on the hoisting shaft 1b.

[0033] The targeting assembly 3 includes a low-speed moto...

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Abstract

The invention discloses an underground magnetic marker positioning and pointing tool. The underground magnetic marker positioning and pointing tool comprises a supporting part, wherein a gravity eccentric assembly is arranged on the supporting part, and a marker searching assembly is arranged on the gravity eccentric assembly; the marking assembly comprises a low-speed motor, an output shaft of the low-speed motor is horizontally arranged, and the output shaft of the low-speed motor is fixedly connected with a pointing magnetic needle. By adopting the underground magnetic marker positioning and pointing tool, the position of an underground magnetic marker can be accurately marked, so that the position of a marked optical fiber on a sleeve is obtained; and an operator can divide a dangerousarea by taking the marked position as a reference and perforate a hole avoiding the dangerous area.

Description

technical field [0001] The invention relates to a logging tool, in particular to a downhole magnetic marker positioning and pointing tool. Background technique [0002] In the process of oilfield development, it is necessary to know the detailed information on the characteristics and state of the fluid in the well. Optical fiber logging has the advantages of being insensitive to electromagnetic interference and able to withstand extreme conditions; it can perform continuous measurement along the wellbore during the entire production cycle, realizing Permanent monitoring of oil and gas wells, providing producers with detailed, comprehensive and accurate downhole production data. [0003] During the arrangement of downhole sensors and optical fibers, the optical fibers are usually fixed along the length of the casing, and the outer wall of the casing is provided with an optical fiber fixing device at a certain distance in each axial direction, which is used to fix the optical ...

Claims

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Application Information

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IPC IPC(8): E21B47/092
CPCE21B47/092
Inventor 曲海唐世茂胡誉双张硕
Owner CHONGQING UNIVERSITY OF SCIENCE AND TECHNOLOGY
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