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THE BEHAVIOUR OF DRILL PIPES WITH SURFACE DEFECTS IN THE CASE OF DIRECTIONAL DRILLING


STANCIU LAVINIA SILVIA, POPA IOAN
OIL-GAS UNIVERSITY OF PLOIESTI, GENERAL MECHANICS DEPARTMENT ALEXSTANCIU@PLOIESTI.ASTRAL.RO, IPOPA@UPG-PLOIESTI.RO

Issue:

MOCM, Number 12, Volume III

Section:

MOCM - Volume III (2006)

Abstract:

The present paper presents the results of some theoretical and experimental researches undertaken by the authors for the purpose to establish the fraction of a drill pipe life consumed by fatigue in a concrete case. As critical drill pipes zones they have been taken into account those from the pipes body, in the drill slips area, used for sustaining the pipes during the handling operations, where the die- marks appear. Hossain [2] suggested that the problem of a dogleg region could be treated on small and well-defined regions of curvature, where the drilling can be considered constant values.

Keywords:

directional drilling, die-mark depth, fatigue, natural deflection, lifetime.

Code [ID]:

MOCM200612V03S01A0041 [0000801]


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