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Class Information
Number: 166/269
Name: Wells > Processes > Distinct, separate injection and producing wells > Fluid injected from longitudinally spaced locations in injection well
Description: A process in which fluid material is introduced into the pores of the earth from locations in an input well which are spaced from each other along the longitudinal axis of the well, i.e., vertically spaced in the ordinary well having a vertical axis.










Patents under this class:
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Patent Number Title Of Patent Date Issued
4711304 Method of and apparatus for injection of steam into multiple well zones Dec. 8, 1987
4709767 Production process for manufacturing low molecular weight water soluble acrylic polymers as drilling fluid additives Dec. 1, 1987
4669542 Simultaneous recovery of crude from multiple zones in a reservoir Jun. 2, 1987
4648455 Method and apparatus for steam injection in subterranean wells Mar. 10, 1987
4640355 Limited entry method for multiple zone, compressible fluid injection Feb. 3, 1987
4638864 Recovery of heavy crude oil from shallow formations by in situ combustion Jan. 27, 1987
4595057 Parallel string method for multiple string, thermal fluid injection Jun. 17, 1986
4566537 Heavy oil recovery Jan. 28, 1986
4540052 Generation of microorganism control composition and use thereof Sep. 10, 1985
4493369 Method of improved oil recovery by simultaneous injection of water with an in-situ combustion process Jan. 15, 1985
4458760 Oil recovery process for stratified high salinity reservoirs Jul. 10, 1984
4458761 Underreamer with adjustable arm extension Jul. 10, 1984
4437520 Method for minimizing subsidence effects during production of coal in situ Mar. 20, 1984
4397353 Method for vertical fracture growth control Aug. 9, 1983
4392530 Method of improved oil recovery by simultaneous injection of steam and water Jul. 12, 1983
4387770 Process for selective injection into a subterranean formation Jun. 14, 1983
4331202 Method for recovery of hydrocarbon material from hydrocarbon material-bearing formations May. 25, 1982
4274487 Indirect thermal stimulation of production wells Jun. 23, 1981
4248302 Method and apparatus for recovering viscous petroleum from tar sand Feb. 3, 1981
4194563 High conformance enhanced oil recovery process Mar. 25, 1980
4192382 High conformance enhanced oil recovery process Mar. 11, 1980
4184549 High conformance oil recovery process Jan. 22, 1980
4166502 High vertical conformance steam drive oil recovery method Sep. 4, 1979
4161983 High conformance oil recovery process Jul. 24, 1979
4161982 High conformance enhanced oil recovery process Jul. 24, 1979
4161218 High conformance enhanced oil recovery process Jul. 17, 1979
4160480 High conformance oil recovery process Jul. 10, 1979
4159037 High conformance oil recovery process Jun. 26, 1979
4109720 Combination solvent-noncondensible gas injection method for recovering petroleum from viscous petroleum-containing formations including tar sand deposits Aug. 29, 1978
4099568 Method for recovering viscous petroleum Jul. 11, 1978
4088188 High vertical conformance steam injection petroleum recovery method May. 9, 1978
4068715 Method for recovering viscous petroleum Jan. 17, 1978
4022278 Recovery of oil by a vertical miscible flood May. 10, 1977
3997004 Method for recovering viscous petroleum Dec. 14, 1976
3983939 Method for recovering viscous petroleum Oct. 5, 1976
3964547 Recovery of heavy hydrocarbons from underground formations Jun. 22, 1976
3957116 Fluid flow control in waterflood May. 18, 1976

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