To eliminate or reduce stick–slip vibration in torsional vibration of the drilling string and
improve the rate of penetration (ROP), a stick–slip vibration model of the drilling string …

The control of multibody drill-string systems is not easy and designing such systems is
considered challenging because of the difficulty in the dynamic analysis of its nonlinear …

The surface texture has effectively mitigated stick–slip vibrations, but the underlying
regulatory mechanisms remain fully elucidated. In response, this study sought to clarify the …

In this article, a coupled axial-torsional drill-string vibration model is established, which
considers the influence of bit balling on rock-breaking and drill-string vibration. First, a bit …

The role of time delay in the control processes aimed at mitigating stick-slip vibration in drill-
strings, is of paramount importance. Its influence on the controlled system's settling time …

Drilling operations are associated with severe vibrations that lead to an inefficient process.
Stick–slip vibration presents one of the major problems in the drilling industry and affects the …

In the process of drilling, the drill string will inevitably produce vibration, increase the
difficulty and risk of drilling, and bring huge economic losses. The effects of drilling fluid …

Severe torsional vibration of the drill string is referred to as stick–slip. Although it is widely
believed that drill string vibration can affect drilling efficiency, there have been no detailed …

当钻头钻进时, 环空内的钻井液因混合大量岩屑会表现出较强的非牛顿流变性,
对钻柱振动行为产生较大影响. 采用Hamilton 变分原理建立了转盘钻井钻柱纵-横-扭耦合(Axial …

The drilling mud shows strong non-Newtonian rheology due to mixing a large number of
cuttings at well bottom during drilling, which has great influences on the vibration behavior of …