1
Harold J Vinegar, Monroe H Waxman: In-situ method for determining pore size distribution, capillary pressure and permeability. Shell Oil Company, February 17, 1987: US04644283 (244 worldwide citation)

An in-situ method of determining the pore size distribution, capillary pressure curve, and permeability of a formation using induced polarization logging measurements. The induced polarization (IP) voltage decay curve is measured opposite the formation of interest and the voltage decay curve is deco ...


2
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.


3
Daniel J O Meara Jr, Harold J Vinegar: Method for determining capillary pressure and relative permeability by imaging. Shell Oil Company, January 16, 1990: US04893504 (216 worldwide citation)

The present invention provides methods and apparatus for determining relative permeability and capillary pressure employing saturation profile images of fluids in a porous sample obtained by imaging apparatus. The methods employ saturation profiles of a fluid to obtain time and spatial derivatives o ...


4
Harold J Vinegar, Xueying Xie, David Scott Miller: Varying heating in dawsonite zones in hydrocarbon containing formations. Shell Oil Company, July 7, 2009: US07556096 (174 worldwide citation)

A method for treating an oil shale formation comprising dawsonite includes assessing a dawsonite composition of one or more zones in the formation. Heat from one or more heaters is provided to the formation such that different amounts of heat are provided to zones with different dawsonite compositio ...


5
Benjamin P Nutter: Pressure controlled reversing valve. Schlumberger Technology Corporation, David L Moseley, William R Sherman, Stewart F Moore, October 19, 1976: US03986554 (63 worldwide citation)

In accordance with an illustrative embodiment of the present invention, a pressure controlled reversing valve includes a housing having a flow passage and ports to communicate the passage with the well annulus outside the housing, valve means for normally closing said ports, valve operator means mov ...


6
Luc Van Puymbroeck, John W Harrell, Michael H Johnson, Pierre E Collee: Method and apparatus for simultaneous coring and formation evaluation. Baker Hughes Incorporated, Trask Britt & Rossa, December 28, 1999: US06006844 (56 worldwide citation)

A core barrel having an inner tube for coring and, alternately, a center plug assembly for closing the throat of the core bit at the bottom of the assembly for drilling in lieu of coring. The inner tube assembly and plug assembly are disposable and retrievable through the drill string on a wireline ...


7
Lee Morgan Smith, William A Goldman: Method of assaying compressive strength of rock. Dresser, Browning Bushman, June 16, 1998: US05767399 (50 worldwide citation)

A method of assaying the compressive strength of rock comprises testing a primary plurality of rock samples of similar lithology, at least some of which have different porosities, to determine, for each sample respectively, a value corresponding to compressive strength and a value corresponding to p ...


8
Mukul M Sharma, Roger T Bonnecaze, Bernard Zemel: Downhole in-situ measurement of physical and or chemical properties including fluid saturations of cores while coring. Advanced Coring Technology, Strasburger & Price, April 24, 2001: US06220371 (43 worldwide citation)

The present invention is a method and apparatus for real time in-situ measuring of the downhole chemical and or physical properties of a core of an earth formation during a coring operation. The present invention comprises several embodiments that may use electromagnetic, acoustic, fluid and differe ...


9
Mukul M Sharma, Roger T Bonnecaze, Bernard Zemel: Downhole in-situ measurement of physical and or chemical properties including fluid saturations of cores while coring. Advanced Coring Technology, Matthew J Booth, Strasburger & Price L, November 16, 1999: US05984023 (36 worldwide citation)

The present invention is a method and apparatus for real time in-situ measuring of the downhole chemical and or physical properties of a core of an earth formation during a coring operation. The present invention comprises several embodiments that may use electromagnetic, acoustic, fluid and differe ...


10
Homero C Castillo: Apparatus and methods for continuous tomography of cores. Baker Hughes Incorporated, Cantor Colburn, September 6, 2011: US08011454 (35 worldwide citation)

A method of estimating a property of interest downhole according to one aspect of the disclosure may include continuously receiving a core drilled from a formation into an open end of a chamber while removing the core distal from the open end of the chamber. The method further includes obtaining a m ...