1
Rajen Puri, Paul T Pendergraft: Method for producing methane-containing gaseous mixtures. Amoco Corporation, Scott P McDonald, Richard A Kretchmer, February 14, 1995: US05388645 (253 worldwide citation)

Processes are disclosed for separating an oxygen-containing gas into oxygen-enriched and oxygen-depleted streams. The oxygen-depleted stream is injected into a methane-containing solid carbonaceous subterranean formation to produce a methane-containing gaseous mixture. The oxygen-enriched stream is ...


2
Joseph J Chaback, Dan Yee, Richard F Volz Jr, John P Seidle, Rajen Puri: Method for treating a mixture of gaseous fluids within a solid carbonaceous subterranean formation. Amoco Corporation, Charles P Wakefield, Richard A Kretchmer, August 8, 1995: US05439054 (239 worldwide citation)

A method for treating a mixture of gaseous fluids within a solid carbonaceous subterranean formation. In some embodiments, the invention provides for the disposal of a strongly adsorbing gaseous fluid within the formation. In other embodiments, the invention provides a means for fractionating a mixt ...


3
Rajen Puri, Dan Yee: Method for producing methane-containing gaseous mixtures. Amoco Corporation, Scott P McDonald, Richard A Kretchmer, February 14, 1995: US05388640 (235 worldwide citation)

A method is disclosed for increasing the production of methane from a solid carbonaceous subterranean formation having a standard initial production rate of a methane-containing gas of X standard cubic feet per unit time. The method comprises the steps of injecting an inert methane-desorbing gas int ...


4
Dan Yee, Rajen Puri: Coalbed methane recovery using pressure swing adsorption separation. Amoco Corporation, Charles P Wakefield, Richard A Kretchmer, Scott P McDonald, February 14, 1995: US05388643 (232 worldwide citation)

A method is disclosed for using a pressure swing adsorption separator system to provide an oxygen-depleted gaseous effluent for injecting into a suitable solid carbonaceous subterranean formation, such as a coalbed, to enhance the recovery of methane from the formation.


5
Rajen Puri, Dan Yee: Coalbed methane recovery using membrane separation of oxygen from air. Amoco Corporation, Charles P Wakefield, Richard A Kretchmer, Scott P McDonald, February 14, 1995: US05388642 (232 worldwide citation)

A method of recovering methane from a solid carbonaceous subterranean formation having a production well in fluid communication with the formation and an injection well in fluid communication with the formation, comprising the steps of passing a gaseous fluid containing at least 60 volume percent ni ...


6
Dan Yee, John P Seidle, Rajen Puri: Method for reducing the inert gas fraction in methane-containing gaseous mixtures obtained from underground formations. Amoco Corporation, Scott P McDonald, Richard A Kretchmer, February 14, 1995: US05388641 (232 worldwide citation)

A method for reducing the inert gas fraction volume percent present in a methane-containing mixture produced by injecting an inert gas into a solid carbonaceous subterranean formation is disclosed. The method reduces the inert gas fraction by suspending the injection of the inert gas or by reducing ...


7
Eric L Bandurski, John W Kearns, Houston B Mount: Method and apparatus for measuring free hydrocarbons and hydrocarbons potential from whole core. Amoco Corporation, James A Gabala, Richard A Kretchmer, Frank J Sroka, April 13, 1993: US05201219 (227 worldwide citation)

A heating probe and collection assembly is provided for evaluating free hydrocarbons and hydrocarbon potential of whole core. In one embodiment, the one or more assemblies are used with a core transport system to provide measures of hydrocarbon potential as a function of depth.


8
Tommy M Warren, Lawrence A Sinor: Anti-whirl underreamer. Amoco Corporation, Charles P Wakefield, Richard A Kretchmer, April 4, 1995: US05402856 (159 worldwide citation)

An anti-whirl underreamer comprising a body configured for connection to a drillstring, at least two arms carried by the body which are extendable between a retracted position and a projected position, a movable piston and biased spring assembly for moving the arms, a plurality of cutting elements c ...


9
Tommy M Warren, Houston B Mount: Curved drilling apparatus. Amoco Corporation, James A Gabala, Richard A Kretchmer, June 13, 1995: US05423389 (132 worldwide citation)

A rotary drill bit for drilling a curved subterranean borehole. In one embodiment, the drill bit comprises a side portion, a plurality of cutting elements that produce a lateral force on the drill bit in response to the rotation of the drill bit in the borehole, and bearing means. The bearing means ...


10
James L Taylor: Process for spectrophotometric analysis. Amoco Corporation, Thomas A Yassen, Richard A Kretchmer, Frank J Sroka, June 29, 1993: US05223715 (92 worldwide citation)

A process is provided for obtaining spectral information and quantifying the physical properties of a sample. The process comprises launching polychromatic light having a wavelength ranging from about 100 nanometers to about 2500 nanometers alternately through at least one sample channel and at leas ...