Patents by Inventor William M. Duncan, Jr.

William M. Duncan, Jr. has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Acid based micro-emulsions
    Patent number: 6593279
    Abstract: 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 cuttings, well formations and down hole and surface oil well drilling and production equipment.
    Type: Grant
    Filed: December 10, 1999
    Date of Patent: July 15, 2003
    Assignee: Integrity Industries, Inc.
    Inventors: James R. Von Krosigk, William M. Duncan, Jr.
  • ACID BASED MICRO-EMULSIONS
    Publication number: 20020132740
    Abstract: 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 cuttings, well formations and down hole and surface oil well drilling and production equipment.
    Type: Application
    Filed: December 10, 1999
    Publication date: September 19, 2002
    Inventors: JAMES R. VON KROSIGK, WILLIAM M. DUNCAN, JR.
  • Drilling fluid and drilling fluid additive
    Patent number: 5587354
    Abstract: 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 the range of 1-8% by volume. The additive has a number of advantages, particularly improved penetration rate, high lubricity and low toxicity.
    Type: Grant
    Filed: April 26, 1994
    Date of Patent: December 24, 1996
    Assignee: Integrity Industries, Inc.
    Inventor: William M. Duncan, Jr.
  • Organic liquid base drilling fluid with terpene
    Patent number: 5559085
    Abstract: 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 fluids, terpene or terpenes is added in the amount of 1-80% by volume to increase the penetration rate and provide other advantages, such as rapid biodegradability. The terpene may be of the unsaturated type or the saturated type.
    Type: Grant
    Filed: May 17, 1994
    Date of Patent: September 24, 1996
    Assignee: Integrity Industries, Inc.
    Inventor: William M. Duncan, Jr.
  • Low toxicity terpene drilling fluid and drilling fluid additive
    Patent number: 5547925
    Abstract: 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 ppm and preferably greater than 100,000 ppm. The most economic additives are a mixture of saturated and unsaturated terpenes and have at least 30% saturated terpenes. The drilling fluid has the advantage of low toxicity over unsaturated terpene drilling fluids.
    Type: Grant
    Filed: February 23, 1994
    Date of Patent: August 20, 1996
    Assignee: Integrity Industries, Inc.
    Inventor: William M. Duncan, Jr.