The invention discloses a vertical well section expansion
pipe forging,
grinding and milling treatment method, aiming at various complex casing damage well conditions of an expansion
pipe casing damage well, a set of efficient and high-quality treatment technology is formed by pointedly adopting the treatment steps of centralizing casing milling of the interior of an expansion
pipe, expansion pipe leading
grinding and milling, shaping and expanding of an over-expansion pipe, expansion pipe
grinding and milling, expansion pipe
forging and milling and the like. The purpose of efficiently and thoroughly
forging, grinding and milling the straight well section expansion pipe is achieved, the application range and the chipping
treatment effect are obviously better than those of a traditional grinding and casing milling technology, development and improvement of the
workover treatment technology are promoted, the wide application value is achieved, the forging, grinding and milling treatment requirements of the straight well section expansion pipe can be met, and the economic benefit is high. And the success rate and the construction
time efficiency of well repair treatment of the type of wells can be improved, and the problem that the treatment difficulty is large after a vertical well section expansion pipe sleeve is damaged is effectively solved.