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US 8,193,124 B2Granted
Emulsifier free oil-based wellbore fluid
AssigneeM-I L.L.C.
InventorsSashikumar Mettath, Steven Young
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Abstract
A wellbore fluid that includes an oleaginous base fluid; and a silanated weighting agent is disclosed. In particular, the silanated weighting agents may be produced by reaction between an alkyl alkoxy silane and a weighting agent Methods of formulating such fluids and methods of drilling using such fluids are also disclosed.
Claims20
A wellbore fluid, comprising:
- an oleaginous base fluid;
- and
- a silanated weighting agent, wherein the silanated weighting agent is produced by the reaction between an alkyl alkoxy silane and a weighting agent, wherein the weighting agent comprises an ore material having reactive hydroxyl groups and/or comprises at least one of oxides, carbonates and/or silicates of calcium, barium, magnesium, iron, strontium, aluminum, and/or zinc.
A method of drilling a subterranean hole with an oil-based drilling fluid, comprising:
- mixing an oleaginous base fluid with a silanated weighting agent to form the oil-based drilling fluid, wherein the silanated weighting agent is produced by the reaction between an alkyl alkoxy silane and a weighting agent, wherein the weighting agent comprises an ore material having reactive hydroxyl groups, and/or comprises at least one of oxides, carbonates and/or silicates of calcium, barium, magnesium, iron, strontium, aluminum, and/or zinc;
- and
- drilling the subterranean hole using the oil-based drilling fluid.
A method of formulating an oil-based wellbore fluid, comprising:
- adding at least one alkyl alkoxy silane or alkyl alkoxy siloxane to an oleaginous fluid;
- adding a quantity of water sufficient to initiate hydrolysis of the at least one alkyl alkoxy silane or alkyl alkoxy siloxane;
- adding at least one weighting agent material having reactive hydroxyl groups;
- and
- allowing a chemical reaction between the alkyl alkoxy silane or alkyl alkoxy siloxane and the at least one weighting agent material to occur to form a silanated weighting agent mixed in the oleaginous base fluid.
2 more elements
Dependencies are inferred from the claim text.