This paper mainly introduced the casingprogram of the coalbed gas well, drilling parameter, coring tool and technologies and so on.
文中主要介绍了煤层气井的井身结构、钻井参数、取心工具和工艺等。
3
Because the limit of special casingprogram of sidetracking well and horizontal well, the fishing success ratio of conventional little junk fisher is low.