This paper mainly introduced the casing program 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。
Drilling displacement interference is a typical interference in the application of home-made rotary sidewall coring tool which influences engineers normal operation and coring result.
钻进位移干扰是国产旋转式井壁取心仪应用中的一类典型干扰，直接影响着操作工程师的正常操作和取心结果。
Conventional double tube bits should be used as bits for drilling, while coring tool is double tube.
当取心钻具采用双层管时，钻进所用的钻头就需要用普通双管钻头。
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