Труды Института механики им. Р.Р. Мавлютова

ISSN 2542–0380

Электронный научный журнал | Electronic Scientific Journal

Proceedings of the Mavlyutov Institute of Mechanics

Khakimov A.G., Sharafutdinov Z.Z. Stress deformed state of a drill string under off-design conditions Proceedings of the Institute of Mechanics of Ufa Branch of RAS. 4 (2006). 68–72.

2006. Vol. 4. Issue 1, Pp. 68–72
URL: http://proc.uimech.org/uim2006.1.006
DOI: 10.21662/uim2006.1.006

Stress deformed state of a drill string under off-design conditions

Khakimov A.G.^∗, Sharafutdinov Z.Z.^∗∗

^∗Institute of Mechanics, Ufa
^∗∗OAO Giprotruboprovod, Moscow

Abstract

The paper gives a methodology for calculating the drill string performance under off-design conditions, including the passage through the interface separating rocks with very different physico-mechanical characteristics, drilling of boulder rocks, and dynamic modes of operation. One of the mechanisms of the destruction of drill string elements and roller cutters is revealed.

Keywords

stress state,
drill string,
off-design conditions