1
Abraham George E, Royo Carlos M: In situ coal gasification process. Cities Service Oil Company, November 6, 1973: US3770398 (246 worldwide citation)

A method for in situ coal gasification to recover a calorific value gas by the water-gas shift reaction for the optimum formation of carbon monoxide and hydrogen through the simultaneous introduction of carbon dioxide and steam into an injection well in order to shift the reaction kinetics of the pr ...


2
Land Karl M: Means for stabilizing wellbores. Cities Service Oil Company, July 17, 1973: US3746092 (101 worldwide citation)

Disclosed herein is an expandable casing comprised of inside and outside axial sections of casings which fasten to form a sealed casing joint capable of withstanding pressure and formation loads as the casing is expanded and locked into position. The expandable casing stabilizes wellbores, preventin ...


3
Brown Larry P: Apparatus and process for the solution and heating of sulfur containing natural gas. Cities Service Oil Company, July 10, 1973: US3744565 (47 worldwide citation)

A hydrocarbon well producing principally hydrogen sulfide, carbon dioxide and free sulfur is produced by pumping a solvent into the well to dissolve the free sulfur contained therein. The solvent is heated and introduced at a point within the production string at which the sulfur would normally begi ...


4
Rhoades Vaughan W: In situ gasification of coal by gas fracturing. Cities Service Oil Company, November 27, 1973: US3775073 (24 worldwide citation)

Two or more wells are drilled into a coal seam. The wells are completed so as to isolate all other strata from the coal seam and a radially extended horizontal fracture is directed by introduction of a first combustion supporting gas under hydraulic pressure so as to connect the wells communitively. ...


5
Scott J O: Method of in situ coal gasification. Cities Service Oil Company, May 22, 1973: US3734184 (23 worldwide citation)

A method for distilling coal in situ through gasification to recover hydrocarbons and a calorific value gas by treating a rubblized bed of coal underground. A rubblized bed of coal is produced from the surface through wells or shafts sealed to convey fluids under high pressure to or from the coal be ...


6
Marcellis Alphonso W, Peterson Donald H: Lubricating oil additive and lubricating oil compositions containing same. Cities Service Oil Company, Carpenter John W, December 31, 1974: US3857791 (23 worldwide citation)

An improved lubricating oil additive having, among other desirable properties, detergency and superior rust inhibitory characteristics and lubricating oil compositions containing said additive. The additive is a two component mixture comprising a high molecular weight amido-amine and a high molecula ...


7
Rosenwald Gary W: Cell for collecting and mixing fluids. Cities Service Oil Company, Gunn Elton F, February 5, 1974: US3789670 (22 worldwide citation)

Apparatus for collecting a sample of fluids which includes a piston slidable in a cylinder displacable by the sample. A mixing element is provided within the cylinder. The piston and end wall of the cylinder are of such configuration that when the piston and end wall are in contact a small space of ...


8
Biles Jerry W: Selective plugging method. Cities Service Oil Company, April 25, 1972: US3658131 (21 worldwide citation)

The more permeable channels in an oil producing formation are selectively plugged by the reaction in the formation of sodium silicate and a divalent cation-containing brine present in the formation. The sodium silicate reactant is separated from the formation brine by an inert spacing medium so that ...


9
Rhoades Vaughan W: Uranium solution mining process. Cities Service Oil Company, January 30, 1973: US3713698 (18 worldwide citation)

One or more production wells are drilled and completed into a uranium bearing formation having a high water saturation. The water saturation is removed from the area within the uranium formation by injecting a slug of an oxidant through the production wells. A series of injection wells is completed ...


10
Rhoades Vaughan W: Simplified wellbore pressure testing apparatus. Cities Service Oil Company, January 23, 1973: US3712129 (17 worldwide citation)

A length of microtubing is strung from the surface to the bottom of a well string during well completion and sealed at the surface by a valve. Pressure is recorded as desired by regulation of a pressurized gas, metered by a microflow mechanism, into the microtubing so that a predetermined flow of ga ...