This paper discusses the prediction of the drill stem torque and bit forward direction in an offshore horizontal well by nonlinear FEM.
探讨了非线性有限元在预测水平井钻进中的钻柱扭矩及钻头前进方向的应用。
The paper describes briefly the structural features and performance of the drill and its effects in use as well.
本文简要介绍了该设备的结构特点、性能及使用效果。
This paper introduces the working principle and structure parameter of the picker finger seed drill.
本文阐述了指夹式排种器的工作原理和结构参数。
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