1
Kaufman Paul Richard: Secondary oil recovery method using n-sulfohydrocarbon-substituted acrylamide polymers as viscosity increasing agents. The Lubrizol Corporation, July 25, 1972: US3679000 (61 worldwide citation)

Polymers of N-sulfohydrocarbon-substituted acrylamides, especially 2-acrylamido-2-methylpropanesulfonic acid, are useful for controlling the viscosity of aqueous media used in water-flooding operations for secondary petroleum recovery. The preferred polymers are homopolymers and copolymers with acry ...


2
Thompson James L: Method for secondary oil recovery. Atlantic Richfield Company, August 17, 1971: US3599716 (23 worldwide citation)

A secondary oil recovery method which comprises successively injecting into a subterranean oil-bearing formation air and water, e.g. as alternate slugs. The water has dissolved therein a surfactant and an acid or base to increase the efficiency of the surfactant.


3
E Sam Tubin, Stewart Tongret: Secondary oil recovery method and system. E Sam Tubin, Wills Green & Mueth, November 28, 1978: US04127169 (17 worldwide citation)

A novel method for stimulating the flow of oil from the pay zone of a formation traversed by a bore hole which involves the conversion of liquid water into steam in situ in heat transfer proximity to the pay zone. A novel oil tool adapted to be lowered and suspended within the bore hole in proximity ...


4
E Sam Tubin, Stewart Tongret: Secondary oil recovery method and system. E Sam Tubin, Wills Green & Mueth, January 29, 1980: US04185691 (13 worldwide citation)

A novel method for stimulating the flow of oil from the pay zone of a formation traversed by a bore hole which involves the conversion of liquid water into high pressure steam in situ in heat transfer proximity to the pay zone. A novel oil tool adapted to be lowered and suspended within the bore hol ...


5
Frank W Slater, Dale Fuqua: Secondary recovery method and system using solar energy and concentric tank separator. Harvey B Jacobson, February 10, 1981: US04249605 (13 worldwide citation)

A secondary oil recovery method and system utilizing a concentric tank arrangement receiving crude oil from an oil well in the inner tank thereof with the crude oil being heated by a solar furnace to facilitate separation of water, oil and gas with the water being disposed within the outer tank for ...


6
Christopher Charles A, Allen Joseph C, Kolaian Jack H: Secondary oil recovery method. Texaco, September 18, 1973: US3759326 (11 worldwide citation)

A method for the production of hydrocarbons from subterranean reservoirs which comprises having at least one production well and one injection well penetrating the reservoir and injecting a fluid into the injection well to drive the hydrocarbons to the production well. The fluid comprises an intimat ...


7
Tate Jack F: Secondary oil recovery method. Texaco, Whaley T H, Ries C G, Young James F, September 2, 1975: US3902556 (5 worldwide citation)

Significant improvement in the recovery of hydrocarbons from a subterranean hydrocarbon-bearing formation containing acid-soluble components is accomplished by injecting into the formation via an injection well drilled into a formation communicating with an adjacent producing well and containing aci ...


8
Harold P Santee: Secondary oil recovery method. Jack H Santee, Robert P Santee, Catherine A McAfee, Head Johnson & Stevenson, October 11, 1983: US04408664

A method of oil recovery from subterranean formations, and especially water wet sand formation, comprising the steps of sequentially establishing a rate of oil production for the formation as a function of formation characteristics, such as perosity, permeability, depth of formation and past product ...


9
Slater Frank W, Fuqua Dale: Methode et systeme recuperateurs secondaires faisant appel a lenergie solaire et a un separateur a cuves concentriques, Secondary recovery method and system using solar energy and concentric tank separator. Slater Frank W, Fuqua Dale, MACRAE & CO, October 26, 1982: CA1134263

ABSTRACT OF THE DISCLOSUREA secondary oil recovery method and system utilizing a concentrictank arrangement receiving crude oil from an oil well in the inner tankthereof with the crude oil being heated by a solar furnace to facilitateseparation of water, oil and gas with the water being disposed wit ...


10
HYDROCARBON RECOVERY PROCESS EXPLOITING MULTIPLE INDUCED FRACTURES. September 28, 2017: US20170275978-A1

A method for enhancing production from multiple-fractured underground “tight” formations. Spaced upwardly-extending injection fissures are created along a horizontal injection wellbore, and upwardly-extending collection fissures, alternately spaced with the injection fissures, are created along the ...