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Detection apparatus and method

A detection device, a technology of conductive components, applied in the direction of detecting the presence of fluid at the leak point, short-circuit testing, liquid tightness measurement using liquid/vacuum degree, etc., can solve problems such as danger, damage to the structural integrity of the pipe body, etc.

Active Publication Date: 2016-06-15
GE OIL & GAS UK LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If such a defect is not detected quickly, the structural integrity of the pipe body can be jeopardized
Defect detection previously usually required visual inspection of the pipe body, which was very dangerous, especially for deepwater and ultra-deepwater installations

Method used

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  • Detection apparatus and method
  • Detection apparatus and method
  • Detection apparatus and method

Examples

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no. 1 example

[0048] Such as image 3 As shown, according to the first embodiment of the present invention, the flexible pipe body further includes a second electric wire 310 extending in the annular shape of the pipe body. The first wire 302 and the second wire 310 are electrically coupled together at their furthest points (or, at some point along their length away from the detection device 306). The second electrical wire is electrically isolated compared to the first electrical wire 302 so that the second electrical wire can pass through the end fitting 308 to the detection device 306 . In general, the first wire 302 and the second wire 310 form a circuit loop such that (at least in the absence of a break) electrical current can pass through one wire and return along the other wire. The second wire 310 differs from the first wire 302 in that the second wire 310 is generally fully electrically insulated along its entire length (as indicated by the insulating layer 314 ). Even if the sec...

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Abstract

A detection apparatus arranged to detect defects within a flexible pipe body. The detection apparatus comprises an electrical power supply and a first meter. The electrical power supply is arranged to couple between, and to supply current to, first and second electrically conductive members extending at least partially along the length of a flexible pipe body and electrically isolated from one another except for being electrically connected at a point remote from the power supply. The first meter is arranged to detect variation between the current flowing in each electrically conductive member. Detected variation is indicative of a pipe body defect causing an Earth fault along one of the electrically conductive members. A corresponding method, a pipeline apparatus including the detection apparatus and a method of forming the pipeline apparatus are also disclosed.

Description

technical field [0001] The invention relates to a detection device and method. In particular, the invention relates to a detection device arranged to detect defects in a flexible pipe body, and a method for detecting defects in a flexible pipe body. Certain embodiments relate to a pipeline assembly including a flexible pipe body and a detection device and methods for forming such a device. Background technique [0002] Typically, flexible pipelines are used to transport product fluids, such as oil and / or natural gas and / or water, from one location to another. Flexible pipes are particularly useful for connecting an underwater location (which may be a relatively deep underwater location, such as 1000 meters or more underwater) to a sea level location. The tubing may have an inner diameter typically up to about 0.6 metres. Flexible pipe is generally formed as an assembly of a flexible pipe body and one or more end fittings. The flexible pipe body is generally formed as a c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01M3/18
CPCG01M3/18G01R31/52
Inventor 约翰·克罗斯·麦克纳布杰弗里·斯蒂芬·格雷厄姆菲利普·迈克尔·亨特·诺特
Owner GE OIL & GAS UK LTD