Non-excavation detection process of bimetallic composite pipe for oil and gas field exploitation or oil and gas transportation

Abstract

The invention provides a non-excavation detection process of a bimetallic composite pipe for oil and gas field exploitation or oil and gas transportation. According to the process, a bimetallic composite pipe visual detection system is arranged in a liner pipe of the bimetallic composite pipe to be detected, and the detection system is remotely driven to walk in the liner pipe so as to detect andlocate defects such as deformation, collapse, bulge and the like in the liner pipe in real time. The detection system comprises a bin body, a frame, a driving unit, a battery pack, a supporting guidewheel set, a signal receiving and transmitting device, a camera assembly, a deformation sensing assembly, a positioning unit and a remote controller. According to the process, the picture of the innerwall of the liner pipe of the bimetallic composite pipe can be displayed in real time, the detection period is obviously shortened, and the equipment downtime is shortened; the deformation position of the liner pipe of the bimetallic composite pipe can be accurately positioned, unnecessary excavation detection is avoided, the detection efficiency is obviously improved, and the detection cost is reduced; inner wall detection can be carried out on pipelines with different pipe diameters, and the adaptability is high.

Description

technical field [0001] The invention belongs to the technical field of underground pipeline detection for oil and gas field exploitation or oil and gas transportation, and specifically relates to a method for detecting bimetallic composite pipes used in oil and gas field exploitation or oil and gas transportation without excavation. Background technique [0002] At present, bimetallic composite pipelines have been widely used in oil and gas field exploitation and oil and gas transportation, although bimetallic composite pipelines can better solve the problem of high H content 2 S, Cl - and CO 2 Oil and gas field pipelines have corrosion problems, but there are still deficiencies in the use process. The liner of the bimetallic composite pipeline adopts the API 5LC standard, which only lists 5 kinds of materials, and does not include H 2 S / CO 2 The material used in the environment. During the use of bimetallic composite pipelines in some blocks of the oilfield, it was foun...

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Problems solved by technology

[0002] At present, bimetallic composite pipelines have been widely used in oil and gas field exploitation and oil and gas transportation, although bimetallic composite pipelines can better solve the problem of high H content 2 S, Cl - and CO 2 Oil and gas field pipelines have corrosion problems, but there are still deficiencies in the use process. The liner of the bimetallic composite pipeline adopts the API 5LC standard, which only lists 5 kinds of materials, and does not include H 2 S / CO 2 Materials used in the environment

During the use of bimetallic composite pipelines in some blocks of the oilfield, it was found that the liner of bimetallic composite pipes was deformed, collapsed, and bulged, which caused the cross-sectional area of ​​the pipeline to become smaller and affected production, and severe cases caused punctures and leaks that caused shutdowns

[0003] The inventor found through research that: due to the difference in the material of the base pipe and the liner of the bimetallic composite pipe and the grain size level, the conventional ultrasonic testing technology and equipment cannot effectively detect pipeline defects. Excavation, high detection cost and low efficiency seriously affect production

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