Richard E. Dilgren

Person

Houston, TX, US

People

Patents Grantslast 30 patents

Information Patent Grant
Steam-foaming surfactant mixtures which are tolerant of divalent ions
- Patent number 4,643,256
- Issue date Feb 17, 1987
- Shell Oil Company
- Richard E. Dilgren
- E21 - EARTH DRILLING MINING
Information Patent Grant
Process for selecting a steam foam forming surfactant
- Patent number 4,601,336
- Issue date Jul 22, 1986
- Shell Oil Company
- Richard E. Dilgren
- E21 - EARTH DRILLING MINING
Information Patent Grant
Reservoir preflushing process for increasing the rate of surfactant...
- Patent number 4,597,442
- Issue date Jul 1, 1986
- Shell Oil Company
- Richard E. Dilgren
- E21 - EARTH DRILLING MINING
Information Patent Grant
Olefin sulfonate-improved steam foam drive
- Patent number 4,562,727
- Issue date Jan 7, 1986
- Shell Oil Company
- Richard E. Dilgren
- G01 - MEASURING TESTING
Information Patent Grant
Selective steam foam soak oil recovery process
- Patent number 4,532,993
- Issue date Aug 6, 1985
- Shell Oil Company
- Richard E. Dilgren
- E21 - EARTH DRILLING MINING
Information Patent Grant
Olefin sulfonate-improved steam foam drive
- Patent number 4,488,976
- Issue date Dec 18, 1984
- Shell Oil Company
- Richard E. Dilgren
- E21 - EARTH DRILLING MINING
Information Patent Grant
Olefin sulfonate-improved steam foam drive
- Patent number 4,393,937
- Issue date Jul 19, 1983
- Shell Oil Company
- Richard E. Dilgren
- E21 - EARTH DRILLING MINING
Information Patent Grant
Hot water foam oil production process
- Patent number 4,161,217
- Issue date Jul 17, 1979
- Shell Oil Company
- Richard E. Dilgren
- E21 - EARTH DRILLING MINING
Information Patent Grant
Steam-channel-expanding steam foam drive
- Patent number 4,086,964
- Issue date May 2, 1978
- Shell Oil Company
- Richard E. Dilgren
- E21 - EARTH DRILLING MINING

Richard E. Dilgren

Person

Patents Grantslast 30 patents

Steam-foaming surfactant mixtures which are tolerant of divalent ions

Process for selecting a steam foam forming surfactant

Reservoir preflushing process for increasing the rate of surfactant...

Olefin sulfonate-improved steam foam drive

Selective steam foam soak oil recovery process

Olefin sulfonate-improved steam foam drive

Olefin sulfonate-improved steam foam drive

Hot water foam oil production process

Steam-channel-expanding steam foam drive