Inventor

RICKETTS THOMAS E

US41 patents

Patents

41 patents

US4372615AFeb 8, 1983

Method for forming an in situ oil shale retort with explosive expansion towards a horizontal free face

OCCIDENTAL OIL SHALE INC23 citations78

US4533181AAug 6, 1985

Method for forming uniform flow rubble bed

OCCIDENTAL OIL SHALE INC18 citations74

US4531783AJul 30, 1985

Stability control in underground workings adjacent an in situ oil shale retort

OCCIDENTAL OIL SHALE INC12 citations74

US4489983ADec 25, 1984

Blasthole spacing for control of particle size

OCCIDENTAL OIL SHALE INC7 citations74

US4360233ANov 23, 1982

Method of bulking an in situ oil shale retort substantially full of fragmented shale

OCCIDENTAL OIL SHALE INC9 citations74

US4353598AOct 12, 1982

Method of blasting pillars with vertical blastholes

OCCIDENTAL OIL SHALE INC10 citations74

US4347789ASep 7, 1982

Downhole delay assembly for blasting with series delay

OCCIDENTAL OIL SHALE INC7 citations74

US4281878AAug 4, 1981

Method for loading explosive laterally from a borehole

OCCIDENTAL OIL SHALE INC9 citations74

US4262965AApr 21, 1981

Triangular blasting into limited voids for vertical free face retorts

OCCIDENTAL OIL SHALE INC7 citations74

US4192554AMar 11, 1980

Method for explosive expansion toward horizontal free faces for forming an in situ oil shale retort

OCCIDENTAL OIL SHALE INC8 citations74

US4366987AJan 4, 1983

Method for forming an in situ oil shale retort with horizontal free faces

OCCIDENTAL OIL SHALE INC11 citations71

US4513665AApr 30, 1985

Method for loading explosive charges into blastholes formed in a subterranean formation

OCCIDENTAL OIL SHALE INC17 citations70

US4441759AApr 10, 1984

In situ oil shale retort system

OCCIDENTAL OIL SHALE INC13 citations69

US4611856ASep 16, 1986

Two-level, horizontal free face mining system for in situ oil shale retorts

OCCIDENTAL OIL SHALE INC2 citations63

US4560206ADec 24, 1985

Method for explosively expanding a pillar

OCCIDENTAL OIL SHALE INC3 citations63

US4560205ADec 24, 1985

Method for control of geometry of fragmented mass in an situ oil shale retort

OCCIDENTAL OIL SHALE INC4 citations63

US4466668AAug 21, 1984

Method of forming an in situ oil shale retort in formation with joints

OCCIDENTAL OIL SHALE INC2 citations63

US4458948AJul 10, 1984

Horizontal free face blasting for minimizing channeling and mounding in situ retort with cusp at intermediate elevation

OCCIDENTAL OIL SHALE INC4 citations63

US4402550ASep 6, 1983

Method for forming an in situ oil shale retort with controlled seismic vibration

OCCIDENTAL OIL SHALE INC6 citations63

US4396231AAug 2, 1983

Horizontal free face blasting for minimizing channeling and mounding

OCCIDENTAL OIL SHALE INC2 citations63

US4326752AApr 27, 1982

Method for forming an in situ oil shale retort

OCCIDENTAL OIL SHALE INC4 citations63

US4326751AApr 27, 1982

Blasting to a horizontal free face with mixing of fragments

OCCIDENTAL OIL SHALE INC4 citations63

US4300800ANov 17, 1981

Method of rubbling a pillar

OCCIDENTAL OIL SHALE INC5 citations63

US4290649ASep 22, 1981

Method for explosively expanding a pillar for forming an in situ oil shale retort

OCCIDENTAL OIL SHALE INC3 citations63

US4245865AJan 20, 1981

Explosive expansion to a limited void with uniform scaled depth of burial

OCCIDENTAL OIL SHALE INC2 citations63

US4238136ADec 9, 1980

Formation of in situ oil shale retort with void at the top

OCCIDENTAL OIL SHALE INC4 citations63

US4370003AJan 25, 1983

Temporary gas seal for gas level drift of an in situ oil shale retort

OCCIDENTAL OIL SHALE INC2 citations61

US4453769AJun 12, 1984

In situ oil shale retort having horizontal voids with side pillars

OCCIDENTAL OIL SHALE INC2 citations59

US4333684AJun 8, 1982

Method of uniform rubblization for limited void volume blasting

OCCIDENTAL OIL SHALE INC4 citations54

US4443037AApr 17, 1984

Method for controlling void fraction distribution in an in situ oil shale retort

OCCIDENTAL OIL SHALE INC1 citations52

US4440444AApr 3, 1984

Method for controlling void in an in situ oil shale retort

OCCIDENTAL OIL SHALE INC1 citations52

US4435017AMar 6, 1984

In situ oil shale retort with differing upper and lower void fractions

OCCIDENTAL OIL SHALE INC1 citations52

US4423908AJan 3, 1984

Formation of an in situ oil shale retort with control of mounding

OCCIDENTAL OIL SHALE INC1 citations52

US4303273ADec 1, 1981

In situ oil shale retort with a generally T-shaped vertical cross section

OCCIDENTAL OIL SHALE INC1 citations52

US4449753AMay 22, 1984

Method for bulking full a retort

OCCIDENTAL OIL SHALE INC1 citations51

US4296968AOct 27, 1981

In situ oil shale retort having horizontally offset pillars

OCCIDENTAL OIL SHALE INC1 citations51

US4443036AApr 17, 1984

Explosive expansion of formation in lifts for forming an in situ oil shale retort

OCCIDENTAL OIL SHALE INC0 citations42

US4336966AJun 29, 1982

Cratering in the deep cratering region to form an in situ oil shale retort

OCCIDENTAL OIL SHALE INC0 citations42

RICKETTS THOMAS E

Patents

Method of rubbling oil shale

Method for forming an in situ oil shale retort in differing grades of oil shale

In situ oil shale retort with non-uniformly distributed void fraction

Method for forming an in situ oil shale retort with explosive expansion towards a horizontal free face

Method for forming uniform flow rubble bed

Stability control in underground workings adjacent an in situ oil shale retort

Blasthole spacing for control of particle size

Method of bulking an in situ oil shale retort substantially full of fragmented shale

Method of blasting pillars with vertical blastholes

Downhole delay assembly for blasting with series delay

Method for loading explosive laterally from a borehole

Triangular blasting into limited voids for vertical free face retorts

Method for explosive expansion toward horizontal free faces for forming an in situ oil shale retort

Method for forming an in situ oil shale retort with horizontal free faces

Method for loading explosive charges into blastholes formed in a subterranean formation

In situ oil shale retort system

Two-level, horizontal free face mining system for in situ oil shale retorts

Method for explosively expanding a pillar

Method for control of geometry of fragmented mass in an situ oil shale retort

Method of forming an in situ oil shale retort in formation with joints

Horizontal free face blasting for minimizing channeling and mounding in situ retort with cusp at intermediate elevation

Method for forming an in situ oil shale retort with controlled seismic vibration

Horizontal free face blasting for minimizing channeling and mounding

Method for forming an in situ oil shale retort

Blasting to a horizontal free face with mixing of fragments

Method of rubbling a pillar

Method for explosively expanding a pillar for forming an in situ oil shale retort

Explosive expansion to a limited void with uniform scaled depth of burial

Formation of in situ oil shale retort with void at the top

Temporary gas seal for gas level drift of an in situ oil shale retort

In situ oil shale retort having horizontal voids with side pillars

Method of uniform rubblization for limited void volume blasting

Method for controlling void fraction distribution in an in situ oil shale retort

Method for controlling void in an in situ oil shale retort

In situ oil shale retort with differing upper and lower void fractions

Formation of an in situ oil shale retort with control of mounding

In situ oil shale retort with a generally T-shaped vertical cross section

Method for bulking full a retort

In situ oil shale retort having horizontally offset pillars

Explosive expansion of formation in lifts for forming an in situ oil shale retort

Cratering in the deep cratering region to form an in situ oil shale retort