Hydrocarbon exploration and production activities are guaranteed through various
operations including the drilling process, which is realized by using rotary drilling systems …

This study introduces a streamlined approach to predict planar drilling trajectory by
employing an efficient nonlinear Delay Differential Equation (DDE) model with high …

This article breaks the limits of applying an equivalent-input-disturbance (EID) approach to
nonlinear systems. These limits are caused by the design requirement for the highest …

在油气井钻进作业过程中, 钻柱长期工作在充满钻井液的狭长井筒里, 其受到井底压力, 摩擦,
岩石硬度变化的影响, 受力情况非常复杂, 会产生多种形式的振动, 这些是影响钻具寿命和钻进 …

The drilling process is among the most crucial steps in exploration and production activities
in the petroleum industry. It consists of using mechanical mechanisms to crush rocks by the …

Offshore drilling platforms are exposed to wind, waves, currents, and other unknown
disturbances. Accurately estimating and rejecting these disturbances is the key to ensuring …

While conducting large-depth vertical drilling, correcting well trajectory deviations is a critical
and challenging task. Designing a feasible deviation-correction trajectory becomes an …

The conventional equivalent-input-disturbance (EID) approach includes an estimation error.
Suppressing the estimation error is an effective way to improve the disturbance-rejection …

The inaccurate positioning of a plat valve is a crucial factor affecting the efficiency and safety
of drilling operations. Because of the complicated structure of vertical drilling, it is difficult to …

This study introduces a fuzzy robust controller that controls the constant bottom-hole
pressure during the implementation of the managed pressure drilling approach by …