Bacterial corrosion resistant continuous pipe for well completion and manufacturing method thereof

Abstract

The invention discloses a bacterial corrosion resistant continuous pipe for well completion and a manufacturing method thereof. A special plate of the bacterial corrosion resistant continuous pipe comprises the following chemical components including, by mass, 0.02%-0.06% of C, 0.15%-0.30% of Si, 0.4%-0.8% of Mn, not larger than 0.01% of P, not larger than 0.005% of S, 1.0%- 3.0% of Cu, 0.4%-0.6%of Cr, 0.1%-0.25% of Ni, 0.2%-0.5% of Mo, 0.01%-0.04% of Ti, 0.02%-0.06% of Nb, not larger than 0.02% of Re and the balance Fe and inevitable impurities. By adding more copper and adopting special heat treatment, precipitated phases (epsilon-Cu) of the copper are uniformly and dispersedly distributed in a matrix of the pipe, and copper ions dissolved out of the surface of the pipe are in contact with bacteria in a service process to cause death of the bacteria, so that the problem of bacterial corrosion of the pipe in the underground service process is solved.

Description

Technical field: [0001] The invention relates to the technical field of oil and gas pipes, in particular to a bacterial corrosion-resistant coiled pipe for well completion and a manufacturing method thereof. Background technique: [0002] In the process of oil and gas development, after the well pipe is drilled underground and the casing is run in, the well completion operation is required. Generally, conventional tubing is used for well completion, and a single ordinary low-carbon seamless steel pipe with a length of about 10 meters is connected to the required length with threaded joints. However, the completion efficiency of conventional tubing is low, and each tubing needs to be threaded and connected with a coupling, which requires a large number of operators and a long construction time. At the same time, there are many threaded joints in a single well, and leakage and crevice corrosion are prone to occur at the threaded joints, which affects the production rate of ga...

AI Technical Summary

Problems solved by technology

However, the completion efficiency of conventional tubing is low, and each tubing needs to be threaded and connected with a coupling, which requires a large number of operators and a long construction time

At the same time, there are many threaded joints in a single well, and leakage and crevice corrosion are prone to occur at the threaded joints, which affects the production rate of gas wells

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