Sentence examples for state of drill from inspiring English sources

The nonlinear dynamics equations are derived to study the motion state of drill string.

The displacement and stress state of drill pipe are simulated and their curves in the different phases are obtained.

There is a growing need for the development and implementation of new numerical methods for computer simulation of static and dynamic critical states of drill strings in connection with mastering deeper oil and gas resources.

Three locate the position of the centroid of the drill-string in space and three permit the dynamical state of the drill-string to be expressed in terms of flexural, torsional and shear strain, together with dilation and stretch.

In each case the advanced discriminatory sensing scheme was used to control the state of the drilling process for cochleostomy formation in the laboratory.

The selection is based on the interpreted state of the drilling process where the high-level controller discriminates characteristics in the coupled sensory transients indicating the onset of breakthrough.

Together, the six photographers have been able to do what no one of them could do alone: crisscross the state, photograph dozens of drill rigs that have popped up along highways and in backyards, and talk to farmers, homeowners, drillers, environmental advocates and lawyers, all of whom have a profound stake in the invisible substance buried more than a mile below ground.

Previous research works employ real-time measurements of all states of the drill string as feedback to the controllers to suppress such vibrations.

The stress strain states of a drill string constrained by the walls of a curvilinear bore-hole are studied with the aim to identify the resistance forces impeding its motion.

The dissipation energy before and after the transition state of the simulated drill string, from the forward whirl to self-rotation, or from the forward whirl to the backward whirl, were analysed.

This is a review article on the state-of-the-art in drilling fluid technology, including the recent advances in fluids for extended-reach and horizontal drilling.