Data processing: structural design – modeling – simulation – and em – Simulating nonelectrical device or system – Fluid
Reexamination Certificate
2007-04-03
2007-04-03
Knight, Anthony (Department: 2123)
Data processing: structural design, modeling, simulation, and em
Simulating nonelectrical device or system
Fluid
C166S250010, C702S006000, C703S010000
Reexamination Certificate
active
09790151
ABSTRACT:
A method for predicting the on-set of sand production or critical drawdown pressure (CDP) in high flow rate gas wells. The method describes the perforation and open-hole cavity stability incorporating both rock and fluid mechanics fundamentals. The pore pressure gradient is calculated using the non-Darcy gas flow equation and coupled with the stress-state for a perfectly Mohr-Coulomb material. Sand production is assumed to initiate when the drawdown pressure condition induces tensile stresses across the cavity face. Both spherical and cylindrical models are presented. The spherical model is suitable for cased and perforated applications while the cylindrical model is used for a horizontal open-hole completion.
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Ong See Hong
Ramos Gangerico G.
Zheng Ziqiong
Baker Hughes Incorporated
Knight Anthony
Madan Mossman & Sriram P.C.
Stevens Tom
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