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| Number | Title | Issue Date |
| 6984610 | Acid based micro-emulsions of surfactants and solvents Acid based micro-emulsions are disclosed comprising water, an acid blend, an anionic surfactant, a nonionic surfactant, a co-solvent, a solvent and an oxidizer. The micro-emulsions have particular utility in cleaning oil sludges and drilling mud residues from well c... | 01/10/2006 |
| 6593279 | Acid based micro-emulsions Acid based micro-emulsions are disclosed comprising water, an acid blend, an anionic surfactant, a nonionic surfactant, a co-solvent, a solvent and an oxidizer. The micro-emulsions have particular utility in cleaning oil sludges and drilling mud residues ... | 07/15/2003 |
| 5587354 | Drilling fluid and drilling fluid additive A drilling fluid additive comprises a monocyclic terpene, preferably d-limonene or dipentene, a bycyclic terpene such as 3-carene, or mixtures thereof and an oil such as mineral oil or vegetable oil. The additive is mixed in a water based drilling mud in ... | 12/24/1996 |
| 5559085 | Organic liquid base drilling fluid with terpene A drilling fluid comprises a continuous phase of diesel oil, mineral oil, ester, mono-ether, di-ether, poly-alpha-olefin, detergent alkylate, terpene and mixtures thereof. Water is added to make an inverted emulsion. In the non-terpene based drilling flui... | 09/24/1996 |
| 5547925 | Low toxicity terpene drilling fluid and drilling fluid additive A water based drilling fluid comprises 1-8% of an additive comprising saturated terpene, a mixture of saturated terpenes or a mixture of saturated and unsaturated terpenes. The drilling fluid is substantially non-toxic and has an LC-50 greater than 30,000... | 08/20/1996 |
