1
See Hong Ong, Gangerico G Ramos, Ziqiong Zheng: Method of predicting the on-set of formation solid production in high-rate perforated and open hole gas wells. Baker Hughes Incorporated, Madan Mossman & Sriram P C, April 3, 2007: US07200539 (10 worldwide citation)

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- ...


2
Ziqiong Zheng: Breakout control to enhance wellbore stability. Baker Hughes Incorporated, Darryl M Springs, January 30, 2001: US06179069 (5 worldwide citation)

A method for encouraging breakout formation during the formation of hydrocarbon producing wellbores. Breakouts are encouraged during drilling operations to increase the stability of the formation rock immediately adjacent to the wellbore. The weight of drilling mud is selected to provide breakout co ...


3
See Hong Ong, Gangerico G Ramos, Ziqiong Zheng: Method of predicting the on-set of formation solid production in high-rate perforated and open hole gas wells. Paul S Madan, Madan Mossman & Sriram PC, October 10, 2002: US20020147574-A1

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- ...



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