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Burton M Casad, Charles R Clark, Lisa A Cantu, D Philip Cords, Edward F McBride: Process for the preparation of fluid loss additive and gel breaker. Conoco, January 22, 1991: US04986355 (204 worldwide citation)

A melted polymer of hydroxyacetic acid with itself or with other hydroxy-, carboxylic acid-, or hydroxycarboxylic acid-containing moieties is subjected to high shear and injected into an organic liquid which is inert to the polymer to form an organic liquid dispersion of very fine polymer particles. ...


2
Burton M Casad, Yogendra Soni, Jeff J Jurinak: Solvent enhanced fracture-assisted steamflood process. Conoco, A Joe Reinert, August 18, 1987: US04687058 (18 worldwide citation)

The addition of vaporized solvent to injected steam in a fracture-assisted steamflood process provides surprisingly significant enhancement of the process as compared to both the basic fracture-assisted steamflood process of the Britton et al. U.S. Pat. No. 4,265,310 patent and to a conventional mat ...


3
Howard H Ferrell, Dell Conley, Burton M Casad, Olaf M Stokke: Polymer flood filtration improvement. Conoco, A Joe Reinert, July 15, 1980: US04212748 (12 worldwide citation)

Filterability of aqueous solutions of polymers employed to thicken waterfloods such as biopolymers (e.g. heteropolysaccharides) is improved by addition of a surfactant (e.g. a sulfated alkoxylated alcohol). Filterability is further enhanced by addition of an ethoxylated alcohol surfactant and/or an ...


4
Burton M Casad, R Leroy Grimsley: Radial design submerged coalescer for separation of liquids. Conoco, Cortlan R Schupbach Jr, February 17, 1981: US04251369 (8 worldwide citation)

A coalescer is provided which separates dispersed liquid hydrocarbon phases from continuous liquid aqueous phases by increasing the size of the dispersed phase droplets using a variety of coalescing media, preferably in granular form. The coalescer must contain at least three sides; however any numb ...


5
Donald H Oertle, Richard M Vennett, Burton M Casad, Fred J Radd: Hydrogen probe with limited active area. Continental Oil Company, Richard W Collins, June 6, 1978: US04092844 (6 worldwide citation)

An insertion-type hydrogen probe with a defined active length is described. The probe is formed of a thin-walled, hydrogen-permeable material, and a hydrogen-impermeable liner inside the probe blocks out all but the defined active section of the probe. The interior of the probe is subjected to high ...


6
Burton M Casad: Determination of residual oil in a subterranean formation. Continental Oil Company, A Joe Reinert, January 31, 1978: US04071756 (5 worldwide citation)

A method for obtaining logging data for use in the determination of the amount of residual oil in a subterranean oil bearing formation, the method comprising the steps of logging the formation, injecting into the formation an aqueous solution of a water soluble radioactive tracer compound, logging t ...


7
Burton M Casad, Preston L Gant: Reservoir evaluation using partitioning tracer. Conoco, October 24, 1989: US04876449 (5 worldwide citation)

Reservoir information for determining residual oil saturation is obtained by injection of a partitioning tracer and a non-partitioning material through an injection well and periodically logging a second well spaced from the injection well to determine time of passage and amount of said injected mat ...


8
Parviz Mehdizadeh, Burton M Casad: Apparatus and method for determining corrosion fatigue inhibitor effectiveness. Continental Oil Company, Richard W Collins, May 3, 1977: US04020680 (4 worldwide citation)

A cyclically stressed, hollow hydrogen sensor probe for evaluating the corrosion fatigue performance of corrosion inhibitors. A portion of the probe is contained in a jacket having an inlet and outlet for circulating a corrosive fluid containing an inhibitor over the outer surface of the probe. Corr ...


9
John N Dew, Burton M Casad, Eugene A Harlacher, Joseph A Kleinpeter: Purification process for coal gas methanation. Continental Oil Company, Cortlan R Schupbach Jr, August 31, 1976: US03977843 (2 worldwide citation)

An improved method for removing sulfur compounds during coal gas methanation comprising removing essentially all carbon dioxide and hydrogen sulfide from synthesis gas, then adding carbon dioxide containing lower levels of sulfur back to the gas stream before feeding the mixture to a desulfurization ...


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