John H Duerksen: Method for in-situ heated annulus refining process. Chevron Research and Technology Company, Edward J Keeling, David J Power, September 8, 1992: US05145003 (240 worldwide citation)

Recovery of viscous petroleum such as from tar sands is assisted using a controlled flow of hot fluid and hydrogen-generating gas in a flow path within the formation; thus a solid-wall hollow tubular member in the formation is used for conducting hot fluid to promote hydrogenation in conjunction wit ...

Luis F Rivas, John Reis, Mridul Kumar: Production of oil from low permeability formations by sequential steam fracturing. Chevron Research and Technology Company, Edward J Keeling, David J Power, Robert D Touslee, February 4, 1992: US05085276 (235 worldwide citation)

A production method for low permeability formations is disclosed. Short steam cycles followed by production of fluids to the surface from a single wellbore is described. The method may be practiced in sequential manner, thereby accessing multiple intervals of hydrogen containing formation. Reflashin ...

Donald Glenn Larson, Anthony John deRuyter, Curtiss Lynn Mixon, Jerry Rudy Gerent: Stabilized laser platform and module interface. Cymer, David J Power, January 26, 1999: US05863017 (79 worldwide citation)

A laser system support structure is provided having an independent, kinematically mounted chamber and optics platform. Swivel-type mounts are used to couple the platform at three points to the laser support frame, thereby allowing the platform to remain static while the support frame, via the swivel ...

Craig S Nunan deceased: Radiotherapy apparatus equipped with low dose localizing and portal imaging X-ray source. Varian Associates, Bella Fishman, David J Power, November 28, 1995: US05471516 (74 worldwide citation)

Apparatus equipped for both megavoltage radiotherapy and a diagnostic X-ray source for portal imaging. Both the high energy therapeutic and low energy diagnostic source of radiation are physically located at the same point in apparatus space, and utilize a single moveable target converter that is ph ...

Ke Tien Liu, Tanh V Nguyen: Gas/liquid flow measurement using coriolis-based flow meters. Chevron Research Company, Edward J Keeling, David J Power, Robert D Touslee, July 9, 1991: US05029482 (65 worldwide citation)

A method of determining mass flow rate and phase distribution of gas/liquid two-phase flows is disclosed. The method uses a Coriolis-based mass flow meter. Flow streams of known mass flow rate and phase distribution are directed through the meter and correlation factors are obtained using an apparen ...

Weston A Anderson, James T Arnold, Gordon R Lavering, Jack J Duffield: X-ray tube having rotary anode cooled with high thermal conductivity fluid. Edward H Berkowitz, Bella Fishman, David J Power, July 30, 1996: US05541975 (42 worldwide citation)

An X-ray tube rotating anode is cooled with a liquid metal functioning as a recirculated heat exchange fluid and/or a metal film in a gap between the anode and a stationary structure. The liquid metal is confined to the gap by (a) a labyrinth having a coating that is not wetted by the liquid, (b) a ...

Palash P Das, Donald G Larson: Excimer laser. Cymer Laser Technologies, David J Power, David G Beck, December 17, 1996: US05586134 (39 worldwide citation)

A housing in a laser system encloses a cathode and a displaced anode and gases ionizable and reactive chemically when a voltage pulse produces a cathode-anode electrical discharge. Moving air cools the components (capacitors, thyratron and triggering circuitry) for producing the voltage pulses. The ...

Charles F Magnani: Multiphase production evaluation method using thru-tubing, wireline packoff devices. Chevron and Research and Technology Company, Edward J Keeling, David J Power, March 17, 1992: US05095983 (32 worldwide citation)

A method for providing improved measurement of oil, water, and gas flow rates in producing wells using thru-tubing wireline inflatable and retrievable packers or plugs to systematically isolate producing zones within a wellbore. Surface flow rates are measured before and after zonal isolation, with ...

Palash P Das, Gary R Stephenson: Maintenance strategy control system and monitoring method for gas discharge lasers. Cymer, David J Power, July 8, 1997: US05646954 (25 worldwide citation)

A diagnostic sub-routine for use by the control system of a gas discharge laser is disclosed. The sub-routine provides a prediction of the time remaining, based upon real-time laser system operations, for each pulse-limited sub-system within the laser. The sub-routine utilizes a calculated average p ...

John H Duerksen, Donald J Anderson, Doug J McCallum, Mark Petrick: Single well injection and production system. Chevron Research and Technology Company, Edward J Keeling, David J Power, July 21, 1992: US05131471 (24 worldwide citation)

A method is disclosed for fluid injection and oil production from a single wellbore which includes providing a path of communication between the injection and production zones.