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。
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。
Glass steel coring tool is specifically developed for improving the core recovery of conglomeratic weak formation and the core integrality in Liaohe Oilfield.
玻璃钢取心工具是专为提高辽河油田含砾石松散地层取心收获率和岩心完整性而研制的。
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