Trysol Limited

Trisol Inc.

Underbalanced Drilling Systems Limited

Donald A Thorssen

Dwight N Loree

Eugene I Moody

A method and an apparatus is provided for use in an underbalanced drilling process using exhaust gases wherein some constituents of the exhaust gas combine with water to form acids. The present invention provides a means of deacidifying drilling fluids. The pH of the drilling fluid is monitored and adjusted to prevent corrosion of equipment by acidic drilling fluids. The drilling fluid may also be optionally treated with anti-scaling agents. The drilling fluid may be a gas, a liquid or a combination of both or it may be gasified oil based drilling fluid.

Water-based drilling fluid deacidification process and apparatus

A wax and asphaltene solvation fluid for use in oil and gas wells is derived as a residual fluid from a feedstock that includes a greater mass percentage of trimethylbenzene than decane, and is preferably sour. Mass percentage of both aromatics and asphaltenes in the residual fluid is in the 30%-70% range, and a complex mixture of both is described.

Oil and gas well operation fluid used for the solvation of waxes and

A fire retarded solvent composition includes a mixture of at least one flammable organic solvent; and a mixture of at least one brominated hydrocarbon, in an amount sufficient to decrease the flame propagation rate of the composition and preferably increase the flash point of the solvent composition. The brominated hydrocarbon may be selected from the group consisting of dibromoethane, dibromomethane, chlorodibromomethane, bromochloromethane, dibromodifluoromethane, dibromodifluoroethane, 1,2,dibromo-1.1-difluoroethane, chlorodibromofluoromethane, 1,2dibromotetrafluoroethane and 1,2dibromoethylene. Dibromomethane and bromochloromethane are preferred. When used as an oil and gas operation fluid, the fluorinated hydrocarbons should not be used, nor should the brominated hydrocarbon be an aromatic or contain an oxygen bridge. The organic solvent is preferably selected from the group consisting of light petroleum distillate, diesel and crude, the fluid hydrocarbon primarily having between 5 and 12 carbon atoms.

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Calgary, Canada

Donald A Thorssen