Failure of horizontal oilwell drilling equipment, in particular the bottom-hole-assembly, is
very costly. Vibration causes tool joint failure, twist-off, and bit-damage, and has motivated …

Flexible bow spring centralizers are commonly used in the drilling industry to ensure a good
centralization of casings inside the borehole. A bow spring centralizer consists of multiple …

This paper proposes a novel computationally efficient dynamics modeling approach for
down-hole well drilling system. The existing drilling modeling methods are either …

The behavior of an oil drill string is considered on example of a rotating flexible shaft in a
rigid tube. The tube (a model of the borehole) is assumed to be an arbitrary space curve …

钻柱振动问题在钻井实践中普遍存在, 钻柱恶性振动是造成钻头, 钻柱失效的重要原因,
其会降低钻井时效, 增加钻井成本. 如何有效识别钻柱恶性振动并加以抑制是一个重要的课题 …

In the new digital age, improving drilling economics with tools like simulation and predictive
analytics are key to enabling digital transformation. A novel real time digital twin has been …

Abstract Model-based engineering has become more prevalent in the drilling industry over
the last few decades. While there is great value in using models, a realistic understanding of …

Beam-in-beam large sliding contact exists in simulations of drillstring-riser systems, offshore
pipe-in-pipe systems, medical catheter-guidewire-stent systems, among others. Large …

The complex dynamics of drill strings under various vibration modes during drilling
operations present significant challenges to the oil and gas industry due to the high costs …

A West Texas operator historically used four to seven PDC bits to TD their Ward County,
Wolfcamp B laterals. Formations there are lithologically more challenging when compared to …