Sensitive optical cable for long distance oil-gas pipeline safety detection

Abstract

The invention discloses a sensing optical fiber for testing safety of long-distance oil-and-gas pipeline, including a rubber rope with first and second circular holes eccentricly installed on two sides of its central diameter, tight bush whose elastic modulus changes periodically with sensing optical fiber in it and a beam of tension resistance yarn placed paralleled with it are installed in the first circular hole, loose bush wherein are several optical fiber used to communicate to communicate and another beam of tension resistance placed paralleled with it are installed in the second circular hole. Besides the second circular hole is a layer of net cloth layer than 1 / 2 of rubber rope circumference and it is spirally wraped and fixed fixed by metal wire, having the same diameter with rubber rope and circumference of the diameter is packed successively by spiral metal wire mental wire and outer layer. Pipeline leaking and outer incident which may do harm to pipeline safety are accurately positioned through measurement to deflection light power of sensing optical fiber in sensing optical fiber along the pipeline.

Description

technical field [0001] The invention belongs to the technical field of signal detection and analysis, and relates to a structural design of a sensing optical cable, in particular to a sensing optical cable for safety detection of oil and gas pipelines. Background technique [0002] At present, there are many detection methods for oil and gas pipeline leakage, mainly including in-pipe detection methods based on magnetic flux, eddy current, camera and other pitching technologies, also known as pipeline crawlers; external detection based on pipeline pressure, temperature, flow, vibration and other operating parameters Methods, including flow difference, pressure difference, negative pressure wave and sound wave method. The advantage of the in-pipe detection method is high positioning accuracy, but the disadvantage is that it cannot be detected online, and it is prone to accidents such as blockage and outage, and has strict requirements on the pipeline. The advantage of the ext...

AI Technical Summary

Problems solved by technology

The optical cable of this structure cannot detect the magnitude of pressure and vibration signals near the pipeline caused by pipeline leakage (related to the leakage intensity), nor can it detect external events that may endanger the safety of the pipeline (such as: crustal subsidence, excessive pressure, near the pipeline) Large-scale mechanical construction and man-made damage, etc.) for effective detection

Images