Fucheng Deng

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Accurate pore pressure prediction is a necessary requirement to well structure optimizing, drilling difficulty minimizing, drilling accidents preventing. It plays a very important role in the economically and efficiently well operating. Previous methods for pore prediction have their own hypothesizes and cannot take into consideration factors that indicate(More)
Based on the elastic plasticity contact analysis theory and the plastic damage yield criterion, a mechanical model of the slip-drilling pipe is established. After studying their plastic deformation and drilling pipe's sliding, optimization of the slip dog's structure has been proposed. In the light of the systems of different specifications of drilling(More)
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