| 摘要 |
PROBLEM TO BE SOLVED: To provide a winze processing method capable of, upon request, promoting release of a seal by a seal member for downhole tools which is conducted during winze processing, and of making removal of a downhole tool and securement of a flow channel designable according to a request, in the midst of diversification of excavation conditions, so that the cost of winze excavation can be reduced and the process can be shortened.SOLUTION: In this winze processing method, a seal member (preferably with hardness of A60-D80) for downhole tools containing an elastic material is made to contact with winze processing liquid such as acids (including hydrochloric acid, formic acid, acetic acid and hydrofluoric acid), alkali, hot water, steam and organic solvents to make the elastic material collapse. |
