Method for reducing sag in drilling, completion and workover fluids
AssigneeHalliburton Energy Services, Inc.
InventorsColin Temple, Andrew Forbes Paterson, Christopher Duncan Leith
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Abstract
A method is disclosed for reducing sag in drilling and completion fluids and in workover fluids. The method employs a drilling fluid comprising a low molecular weight polyalkyl methacrylate with an average molecular weight ranging from about 40,000 to about 90,000. This additive does not result in increased viscosity of the fluid.
Claims18
A method for reducing sag in an oil or invert emulsion based drilling fluid, said method comprising adding to said fluid a low molecular weight polyalkyl methacrylate.
A drilling fluid comprising an oil or invert emulsion base, weighting agents and a low molecular weight polyalkyl methacrylate.
A method for improving the suspension properties of an oil or invert emulsion based drilling fluid without significantly increasing the viscosity of said fluid, said method comprising adding to said fluid an additive comprising a low molecular weight polyalky methacrylate.
The method of claim 16 wherein said polyalkyl methacrylate has an average molecular weight ranging from about 40,000 to about 90,000.
Dependencies are inferred from the claim text.