Intelligent flexible composite constant oil pipe for underground and manufacturing technology thereof

Abstract

The invention discloses an intelligent flexible composite constant oil pipe for underground and a manufacturing technology thereof. The intelligent flexible composite constant oil pipe for the underground replaces a traditional oil extraction method of steel oil pipes along with external applying cables, avoids the corrosion damage of a pipeline and related safety accidents on the basis of solving the problems of corrosion, scale formation and wax deposition, and meanwhile, an oil-submerged electric cable is internally arranged in a pipe body and plays a protective function on the pipe body so as to prevent the pipe body from being corroded by outside oil gas and being worn and damaged by rountrip operation. A related sensor which is internally arranged in the pipe body conducts collecting and monitoring on underground information, and back-feeds the information to a ground control system. According to the intelligent flexible composite constant oil pipe for underground and the manufacturing technology thereof, a multi-row and multi-bundle fiber dip forming technology is adopted to achieve the manufacturing technology, after resin impregnating and forming are conducted on fiber dried silk, a multi-row fiber strip with certain toughness and high strength is formed, the fiber strip is applied to various kinds of function layers, such as compressive armored and tensile armored of the pipeline, therefore the structural strength of the pipeline is improved, and meanwhile, a resin substrate further has the properties of being swelling resistant, hydrolyzing resistant, oil and gas corrosion resistant and high temperature resistant to chemical agents, and a better protection for fiber is facilitated.

Description

technical field [0001] The invention relates to the technical field of fluid transportation, in particular to an intelligent downhole flexible composite coiled tubing and a manufacturing process thereof. Background technique [0002] In the development process of existing oil and gas wells, the traditional operation method of rodless oil production is to use steel tubing and apply submersible cables to go downhole. [0003] Because crude oil, natural gas, condensate gas and other media contain high corrosive bacteria and chemical substances, such as: hydrogen sulfide, sulfur dioxide, iron bacteria, saprophytic bacteria, sulfur bacteria, etc. After a long period of chemical fluid medium transportation and use, it will cause corrosion damage to steel pipelines and externally applied submersible cables under high temperature conditions, causing safety accidents to oil and gas field development, high maintenance and development costs, and serious steel pipe fractures. Accidents...

AI Technical Summary

Problems solved by technology

After a long period of chemical fluid medium transportation and use, it will cause corrosion and damage to steel pipelines and externally coated submersible cables under high temperature conditions, causing safety accidents to oil and gas field development, high maintenance and development costs, and serious steel pipe fractures. Accidents that disrupt the normal production operations of oil wells

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