2b 143 fig2a fig2b copyrightc 2005 by ali ghalambor

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Unformatted text preview: an the source of the kick pressure less the gas hydrostatic at the surface casing shoe, the formation will fail, acting like a “pop value”, and the maximum burst loading on the surface casing will be as show in Fig.2b. 143 Fig.2a Fig.2b Copyright(c) 2005 by Ali Ghalambor & Boyun Guo 144 72 The load line is defined by the two end points. Injection Pressure at the casing shoe. Surface Press.= Inj.P – SD(Dg) (Eq.2) Continuous depositional basin conditions are to be assumed for illustration. In this geological environment, the lowest pressure possible behind the surface casing is the hydrostatic pressure of a full column of native fluid. In this case 0.465 psi/ft salt water(see Fig.3). In maximum load casing design, the backup pressures are always subtracted form the load pressure to determine the net load, called the resultant(Fig.4). Fig.3 Fig.4 Copyright(c) 2005 by Ali Ghalambor & Boyun Guo 146 73 The remaining requirement is to build in extra strength for wear considerati...
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This document was uploaded on 03/28/2014.

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