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RESEARCH PAPERS

Vibratory Power Losses and Delivery to Rock During Rotary-Vibratory Drilling: Part II, Application

[+] Author and Article Information
L. D. Mitchell, D. C. Ohanehi

Virginia Polytechnic Institute and State University, Blacksburg, Va. 24061

J. Mech. Des 102(1), 110-114 (Jan 01, 1980) (5 pages) doi:10.1115/1.3254700 History: Received March 01, 1979; Online November 17, 2009

Abstract

This paper applies the theoretical solution developed in Part 1 of this paper to a rotary-vibratory drilling unit. The theory developed and applied in these papers explains possible causes for the failures of such devices to perform properly in the vertical vibratory mode. This paper predicts improved performance based upon system design changes. Power delivery as a function of depth is studied. Power delivery problems at great depths are uncovered. Further system redesign is suggested. The redesign implementation in the model results in recovery of the power delivery capability to the rock.

Copyright © 1980 by ASME
Topics: Drilling , Rocks , Design , Failure
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