Bj Services Company

Phillip J Rae

Dan Thomas Mueller

Gino A DiLullo

Neil Johnston

Gino F Dilullo Arias

Gino F DiLullo Arias

Daniel J Daulton

Compositions containing a peroxide or peracid and an organic acid salt buffer are provided. Also provided is a method for utilizing such compositions for removing polymers from oil and gas wells, while simultaneously dissolving encountered calcium carbonate deposits.

Compositions containing a buffer and a peroxide or peracid useful for treating wells

This invention relates to a cement composition for cementing oil, gas and geothermal wells comprising: a cement; and an additive comprising a blend of a sodium silicate; water; a carrageenan suspending agent; a sodium polyacrylate; an AMPS terpolymer; a dispersant; and a cellulosic water soluble polymer. The dispersant may comprise a sulfonated naphthalene formaldehyde condensate or a sulfonated ketone acetone formaldehyde condensate. The cellulosic water soluble polymer may comprise HEC or CMHEC. The invention can also function to reduce the occurrence of gas channelling and stabilize foam created by adding nitrogen gas to cement.

Multi-functional additive for use in well cementing

A drilling fluid additive for controlling solids comprising a carrageenan material, such as iota or kappa carrageenan. The drilling fluid additive may be used with other additives, such as a polyacrylate dispersant. Among other things, the drilling fluid additive may be used to drill deviated or horizontal wells, or wells having large diameter boreholes.

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Singapore, Singapore

Phillip J Rae