Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Magnetic oil well optical cable capable of being adsorbed on inner side of metal pipe wall of oil and gas well

A metal tube and magnetic suction technology, applied in wellbore/well components, optical fiber/cable installation, optics, etc., can solve problems such as the inability to adhere to the inner wall of the casing and increase the loss of sound wave energy, so as to reduce losses and increase Acoustic wave sensitivity, the effect of improving sensitivity

Pending Publication Date: 2020-02-14
OPTICAL SCI & TECH (CHENGDU) LTD +2
View PDF0 Cites 4 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Based on the above problems, the present invention provides a magnetic oil well optical cable that can be adsorbed on the inner side of the metal pipe wall of the oil and gas well, which is used to solve the problem that the existing oil well optical cable is suspended in the center of the casing and cannot be closely attached to the inner wall of the casing, thereby Added issues with the degree of loss of acoustic energy as it is transferred from the bushing to the cable

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Magnetic oil well optical cable capable of being adsorbed on inner side of metal pipe wall of oil and gas well
  • Magnetic oil well optical cable capable of being adsorbed on inner side of metal pipe wall of oil and gas well
  • Magnetic oil well optical cable capable of being adsorbed on inner side of metal pipe wall of oil and gas well

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Such as Figure 1-6 As shown, a magnetic oil well optical cable that can be adsorbed on the inner side of the metal pipe wall of an oil and gas well includes a coated optical fiber 6, and a tight cladding 5 is attached to the outer surface of the coated optical fiber 6, and the outer surface of the tight cladding 5 A reinforcement layer is attached to the upper surface, and an adsorption element capable of absorbing the sleeve is attached to the outer surface of the reinforcement layer, and a protective layer 1 is attached to the outer surface of the adsorption element.

[0033] Working principle: When the optical cable is passed through the sleeve, since the optical cable is equipped with an adsorption element that can absorb the sleeve, the optical cable is tightly attached to the inner wall of the sleeve by using the adsorption force of the adsorption element on the sleeve. When the external sound wave When the energy is transferred to the casing, the acoustic energy...

Embodiment 2

[0036] Such as Figure 1-4 As shown, on the basis of Example 1, this embodiment provides a preferred mechanism of the adsorption element, that is, the adsorption element is a plurality of sets of magnet assemblies 2 wrapped on the outer surface of the reinforcement layer, and the plurality of sets of magnet assemblies 2 are coated along the The length direction of the optical fiber 6 is distributed at intervals.

[0037] Preferably, the magnet assembly 2 includes a left semicircular magnet 21 and a right semicircular magnet 22, and the left semicircular magnet 21 and the right semicircular magnet 22 attract each other and are closely attached to the outer surface of the reinforcement layer.

[0038] Preferably, the length of the magnet assembly 2 is 5mm-30mm.

[0039]In this embodiment: the cross section of the left semicircular magnet 21 and the right semicircular magnet 22 can be a semicircular ring, and two magnets with the same shape and size attract each other to form a ...

Embodiment 3

[0042] Such as Figure 5-6 As shown, on the basis of Example 1, this embodiment provides another preferred structure of the adsorption element, that is, the adsorption element includes a strip-shaped film 7 attached to the reinforcement layer, and the strip-shaped film 7 is provided with a plurality of Thin magnet blocks 8 , a plurality of thin magnet blocks 8 are distributed at intervals along the length direction of the coated optical fiber 6 .

[0043] Preferably, the strip-shaped film 7 is a single-layer film, and a plurality of thin magnet blocks 8 are attached to the outer surface of the single-layer film; or the strip-shaped film 7 is a double-layer film, and a plurality of thin magnet blocks 8 are arranged in the double-layer film .

[0044] Preferably, the thickness of the thin magnet block 8 is 0.5mm-2mm, and the shape of the thin magnet block 8 is rectangular, circular or elliptical.

[0045] In this embodiment, the thin magnet block 8 can be packaged and fixed in...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention relates to the technical field of optical fiber sensing, in particular to a magnetic oil well optical cable capable of being adsorbed on the inner side of a metal pipe wall of an oil andgas well. The magnetic oil well optical cable is used for solving the problem that an oil well optical cable in the prior art is hung in the center of the interior of a sleeve and cannot be tightly attached to the inner wall of the sleeve, and therefore the loss degree in the process that sound wave energy is transmitted to the optical cable from the sleeve is increased. The magnetic oil well optical cable comprises a coated optical fiber, a tight wrapping layer is tightly attached to the outer surface of the coated optical fiber, a reinforcing layer is tightly attached to the outer surface of the tight wrapping layer, an adsorption element capable of adsorbing the sleeve is tightly attached to the outer surface of the reinforcing layer, and a protection layer is tightly attached to the outer surface of the adsorption element. The adsorption element can be tightly attached to the inner wall of the sleeve, external sound wave energy directly acts on the optical cable after being transmitted to the sleeve, the loss in the process that the sound wave energy is transmitted to the optical cable from the sleeve is reduced, and therefore the response amplitude of the optical fiber to theexternal sound wave energy is improved, and the sound wave sensitivity of the distributed sound wave sensing optical cable is improved.

Description

technical field [0001] The invention relates to the technical field of optical fiber sensing, and more specifically relates to a magnetic suction oil well optical cable that can be adsorbed on the inner side of metal pipe walls of oil and gas wells. Background technique [0002] Optical fiber, short for optical fiber, is a fiber made of glass or plastic that acts as a means of conduction. Optical fiber distributed acoustic wave sensing technology is more and more widely used in oil and gas exploration and development, downhole production operation status monitoring, seismic monitoring and other fields. It uses optical fiber to have the dual functions of signal transmission and sensing, and does not require external sensors. , only need to connect a test instrument at one end of the optical cable, and analyze the geological structure, oil and gas distribution around the optical cable and other information by detecting the micro-strain condition caused by external acoustic ene...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): E21B47/12G01V1/22G02B6/44G02B6/50
CPCG01V1/226G02B6/443G02B6/4415G02B6/50
Inventor 张仁志王熙明李强冉曾令饶云江栗鸣王玉
Owner OPTICAL SCI & TECH (CHENGDU) LTD
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com