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US 10,208,540 B2Granted
Non-toxic, inexpensive, low viscosity mineral oil based drilling fluid
AssigneeChevron U.S.A. Inc.
InventorsDonald C. Van Slyke, Christopher E. Johnson
Life of this patent
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Abstract
The disclosure relates to drilling fluid compositions, and their method of use, comprising a non-toxic and low cost-to-produce mineral base oil comprising 90 to 100% branched and cyclic-paraffins and virtually aromatic free. The disclosed base oils are suitable to replace diesel oil and distillates in any drilling operation and offers a reduced environmental impact and improved health and safety of employees.
Claims21
A drilling fluid composition useful in the production of oil and gas, formulated with a mineral base oil comprising:
- a) 30-55wt % branched paraffin compounds;
- b) 45-65wt % cyclic paraffin compounds;
- c) 0.1wt % or less aromatic compounds;
- and
- d) 0.005wt % or less polynuclear aromatic compounds;
- wherein the combined amount of a) branched paraffin compounds and b) cyclic paraffin compounds having between 10 and 19 carbon atoms is 90-100wt % of the base oil.
3 more elements
Dependencies are inferred from the claim text.