1
Dennis J Graue: Upgrading and recovery of heavy crude oils and natural bitumens by in situ hydrovisbreaking. World Energy Systems Incorporated, Arthur F Zobal, Geoffrey A Mantooth, December 11, 2001: US06328104 (288 worldwide citation)

A process is disclosed for the in situ conversion and recovery of heavy crude oils and natural bitumens from subsurface formations using either a continuous operation with one or more vertical injection boreholes and one or more vertical production boreholes in which multiple, uncased, horizontal bo ...


2
Armand A Gregoli, Daniel P Rimmer, Dennis J Graue: Upgrading and recovery of heavy crude oils and natural bitumens by in situ hydrovisbreaking. World Energy Systems Incorporated, January 25, 2000: US06016867 (282 worldwide citation)

A process is disclosed for the in situ conversion and recovery of heavy crude oils and natural bitumens from subsurface formations using either a continuous operation with one or more injection and production boreholes, which may include horizontal boreholes, or a cyclic operation whereby both injec ...


3
Graue Dennis J: Traitement et recuperation de petrole brut lourd et de bitumes naturels par hydroviscoreduction in situ, Upgrading and recovery of heavy crude oils and natural bitumens by in situ hydrovisbreaking. World Energy Systems Incorporated, World Energy Systems Incorporated, SMART & BIGGAR, September 18, 2007: CA2363909 (6 worldwide citation)

A process is disclosed for the in situ conversion and recovery of heavy crude oils and natural bitumens from subsurface formations using either a continuous operation with one or more vertical injection boreholes and one or more vertical production boreholes in which multiple, uncased, horizontal bo ...