针对钻头包泥堵钻和钙质胶结层难以进尺等影响钻进效率的几个问题，对刮刀钻头结构进行了改进设计，并取得了令人满意的效果。

Aimed at resolve the several problems which affect drilling efficiency, such as balling up and calcareous cementation, the design of blade bits was modified.

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钙质沉积物堆积在海底，最后压紧并胶结形成石灰岩。

Calcareous sediments accumulated on a sea floor and eventually were compacted and cemented to form limestone.

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省内盆地多为红盆，岩性以砂砾岩为主，其次为砾岩和砂岩，胶结物以钙质和铁质为主。

Basins in Jiangxi province mostly are red basins dominated by sandy conglomerate, and some conglomerate and sandstone with calcareous and ferruginous cementation.

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