The erroneous load transfer curve calculated using the nominal cross-sectional area (AC)
and elastic modulus of a concrete specimen (E CU) was modified by considering the …

钻头随钻地震技术是利用钻井过程中钻头冲击地层产生的振动作为震源的井中勘探技术.
它凭借不中断钻井作业这一特点, 可以实现连续的逆垂直地震剖面(Reverse Vertical Seismic …

We design a numerical algorithm for wave simulation in a borehole due to multipole
sources. The stress–strain relation of the formation is based on the Kelvin–Voigt mechanical …

Abstract The Drill Bit Seismic While Drilling (DB-SWD) is an in-well exploration technology
that uses the vibration generated by the drill bit as seismic source during the operations …

This work studies the wave motion in a fluid-filled borehole in the presence of drill string and
geological formation. The synthetic waveforms are obtained by a three-dimensional axis …

A numerical algorithm for simulation of 2-D (axis-symmetric) wave propagation using a
multidomain approach is proposed. The method uses a cylindrical coordinate system …

Drilling engineering is a high input and risk underground project, which needs the real-time
down-hole diagnosis and forecast technique. Drilling string vibration signal contains full and …

Improving the data rate has been a major challenge in mud pulse telemetry. One of the
reasons for the confinement in lower data rate is due to the lack of knowledge of the mud …