And the larger the mass of the additional system, the greater the amplitude formed after exciting, the more obvious the amortization effect on drilling string.
附加系统质量越大，受到激励后的振幅越大，对钻柱的减振作用越显著。
On the system dynamics, the dynamics model for roller cone bit under the interaction of drilling string and rock was established.
从系统动力学的角度出发，建立了基于钻柱、岩石相互作用下的牙轮钻头动力学模型。
The guided drilling system includes a drill string configured to continuously and accurately bore a hole in the ground without the need to periodically break the connection of the drill string.
该定向钻探系统包括一根构成能连续地和精确地在地面上钻孔并且无需周期地断开其连接的钻杆柱。
The guided drilling system includes a drill string configured to continuously and accurately bore a hole in the ground without the need to periodically break the connection of the drill string.
该定向钻探系统包括一根构成能连续地和精确地在地面上钻孔并且无需周期地断开其连接的钻杆柱。
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