Atlantic Richfield Company

David J Blumer

Albert F Chan

William Mark Bohon

Kieu T Ly

Curtis G Blount

John C Braden

William G McLelland

A method and composition for removing deposits of heavy hydrocarbonaceous materials and finely divided inorganic particulate matter from wellbore and flowline surfaces using a composition containing an alkyl polyglycoside, an ethoxylated alcohol, a caustic and an alkyl alcohol.

Method for removing deposits comprising heavy hydrocarbonaceous materials and finely divided inorganic materials from a flow line using a surfactant composition

Surfactant composition for cleaning wellbore and oil field surfaces

A method for cleaning a wellbore plugged with deposits of heavy hydrocarbons and finely-divided inorganic solids by circulating a surfactant composition containing an alkyl polyglycoside, an ethoxylated alcohol, a caustic and an alkyl alcohol through the wellbore with a coiled tubing.

Method for cleaning wellbore surfaces using coiled tubing with a

A method for removing deposits of heavy hydrocarbonaceous materials and finely divided inorganic particulate matter from a tank using a composition containing an alkyl polyglycoside, an ethoxylated alcohol, a caustic and an alkyl alcohol.

Method for cleaning deposits from a tank using a surfactant composition

Surfactant composition and method for cleaning wellbore and oil field

A method and composition for removing deposits of heavy hydrocarbonaceous materials and finely divided drilling fluid solids from a wellbore using a composition containing an alkyl polyglycoside, an ethoxylated alcohol, a caustic and an alkyl alcohol by injecting the composition into the wellbore, maintaining the composition in the wellbore for a selected time and thereafter producing the composition from the wellbore.

Method for cleaning drilling fluid solids from a wellbore using a

Core samples are obtained through production wells by inserting a milling tool through the production tubing string on the distal end of coilable tubing to mill out a window in the well casing. The milling tool is deflected by a whipstock set in the casing at a predetermined point and encased in cement which, upon setting, is bored to form a pilot bore for the milling tool. A fluid-motor-driven core barrel is provided on the end of the tubing after the milling operation is complete and core drilling is carried out in an underbalanced condition by reducing wellbore pressure through a gas lift so as to minimize core invasion by wellbore fluids including spent milling motor and core drilling motor fluids.

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Anchorage, AK, United States of America

David J Blumer