Dorf Ketal Chemicals Fze

Fluid Energy Group Ltd.

Adrienne Lee

Clay Purdy

Markus Weissenberger

Stig Magnor Nordaa

The present invention discloses a novel aqueous composition for use in removing petroleum-contaminated barium sulfate scale from a surface contaminated with such, said composition comprising: a chelating agent and a counterion component selected from the group consisting of: LiDTPA; NaDTPA; KDTPA; CsDTPA; NaEDTA; KEDTA; TEAHDTPA; and TBAHDTPA; a scale removal enhancer; and a non-ionic surfactant. There is also disclosed methods to use such compositions.

Composition useful in sulfate scale removal

A method for stimulation of a hydrocarbon-bearing formation includes inserting a perforating tool and an acidic composition into a wellbore. An outside surface of the tool is pre-treated prior to downhole insertion with a grease containing a first corrosion inhibitor adapted minimize corrosion by exposure of the tool the acidic composition for a duration of the stimulation process. The acidic composition further comprises a second corrosion inhibitor that reacts with the first corrosion inhibitor to generate a corrosion protective layer onto the outside surface of the tool. The method further includes perforating the wellbore with the tool, allowing the acidic composition to come into contact with the perforated area of the wellbore, removing the tool from the wellbore; and initiating the stimulation of the perforated area using a stimulation fluid.

Methods for stimulation of hydrocarbon-bearing formations while inhibiting corrosion of metal surfaces contacted by acid solutions used in stimulation

The present invention discloses a method and a composition for removing metal sulfide scale present on the surface of a metal, said method comprising:

Composition useful in metal sulfide scale removal

An organic acid composition for use in oil industry activities, said composition comprising an arylsulfonic acid in water as well as the use of said composition to perform various operations in the oil industry. There is also disclosed a solid acid composition comprising a corrosion inhibitor ready for dissolution and use.

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Calgary, Canada

Adrienne Lee