Corrosion-resistant cabled composite coiled tubing reinforced by metal

Abstract

The invention provides a metal-reinforced corrosion-resistant cable composite coiled tubing. The metal-reinforced corrosion-resistant cable composite coiled tubing comprises a lining layer, a reinforcing layer, a sliding wear-resistant layer, an outer protective layer, an insulating interlayer and a transmission line. A metal-reinforced corrosion-resistant cable composite continuous oil pipe replaces a nonmetal cable composite continuous oil pipe, the tensile capacity and the external pressure resistance are improved on the basis of solving corrosion, scaling and wax precipitation, meanwhile, a cable is arranged in a pipe body to protect the cable, external oil gas erosion and abrasion damage during tripping operation are prevented, and the service life of the cable is prolonged. Downhole tools and ground equipment are communicated through data lines such as optical fibers, cables and signal cables which are arranged in the pipe body, so that collection of information and data at the bottom of a well is achieved, production operation conditions are observed and monitored in real time, and safe, efficient and stable production is achieved.

Description

technical field [0001] The invention relates to the field of pipeline equipment, in particular to a metal-reinforced corrosion-resistant cable-clad composite coiled oil pipe. Background technique [0002] With the increase of oil field mining time, more and more digital equipment is used, and production enterprises have requirements for energy saving, emission reduction, cost reduction and efficiency increase. Traditionally, steel oil pipes are only responsible for the function of pressure-bearing transportation, with low efficiency and low energy consumption. High energy, easy to corrode and failure, low construction efficiency, can no longer effectively meet production requirements, basically scrapped after damage, and difficult to repair. [0003] In the oil field, the method of hanging the electric submersible pump under the oil pipe is used to realize oil and water production. This method is to connect the electric submersible pump to the bottom of the oil pipe, fix the...

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Problems solved by technology

[0002] With the increase of oil field mining time, more and more digital equipment is used, and production enterprises have requirements for energy saving, emission reduction, cost reduction and efficiency increase. Traditionally, steel oil pipes are only responsible for the function of pressure-bearing transportation, with low efficiency and low energy consumption. High energy, easy to corrode and fail, low construction efficiency, can no longer effectively meet production requirements, basically scrapped after damage, and difficult to repair

[0003] In the oil field, the method of hanging the electric submersible pump under the oil pipe is used to realize oil and water production. In this way, the electric submersible pump is connected to the bottom of the oil pipe, and the power cable is fixed on the outer wall of the steel oil pipe and lowered into the well. Through the control The rotation frequency of the electric submersible pump realizes production, but because the steel tubing is prone to corrosion and failure, the corrosion and perforation of the tubing lead to frequent downhole operations, and it is difficult to avoid bumping and wear of the externally coated cables during downhole operations, and the lack of phase of the cable wear leads to damage to the electric submersible pump

Although the previous non-metallic cable pipes are corrosion-resistant and have achieved cable protection, they exceed 2,000 meters underground and have a temperature resistance of more than 70 degrees Celsius. The reinforcing material and tensile layer fail quickly in the high-temperature environment underground, and cracks and fractures occur under pressure. fall accident

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