The invention provides an anti-
corrosion coating process in an oil casing
pipe. The process comprises the following steps that firstly, the inner wall of the flat-end oil casing is cleaned; secondly,anti-
corrosion layer
coating treatment and curing treatment are conducted on the inner wall of a flat-end oil casing
pipe body; thirdly, threads at the
pipe end of the oil casing pipe are machined; inthe thread
machining process, the highest temperature of the inner wall of the thread
machining part does not exceed 90% of the upper
limit value of the
temperature resistance of an anti-
corrosion layer of the pipe body in terms of the
celsius degree;
cutting fluid used for thread
machining does not damage the anti-corrosion layer coated on the inner wall of the oil casing pipe; and fourthly, theoil casing pipe is subjected to
coupling tightening and pipe end protection, and the whole anti-corrosion
coating process in the oil casing pipe is completed. The technological process is simple, thedefective product generation probability is low, and the anti-corrosion coating process can be well suitable for coating in the oil casing pipe of high-temperature-resistant anti-corrosion paint, andcoating in the low-end and conventional paint oil casing pipe for
temporary storage and transportation is achieved at a low price.