Patents by Inventor Michael D. Erwin

Michael D. Erwin 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).

  • Water block removal with surfactant based hydrocarbonaceous liquid system
    Patent number: 6911417
    Abstract: A composition, formulation, and method for removing water from a near-wellbore portion of a subterranean formation containing a crude oil and penetrated by a wellbore. The formulation contains alkylpolyglycoside, ethoxylated alcohol and linear alkyl alcohols. The composition contains a hydrocarbonaceous liquid, alkylpolyglycoside, ethoxylated alcohol and linear alkyl alcohol.
    Type: Grant
    Filed: April 29, 2003
    Date of Patent: June 28, 2005
    Assignee: ConocoPhillips Company
    Inventors: Albert F. Chan, Michael D. Erwin
  • Water block removal wih surfactant based hydrocarbonaceous liquid system
    Publication number: 20040229758
    Abstract: A composition, formulation, and method for removing water from a near-wellbore portion of a subterranean formation containing a crude oil and penetrated by a wellbore. The formulation contains alkylpolyglycoside, ethoxylated alcohol and linear alkyl alcohols. The composition contains a hydrocarbonaceous liquid, alkylpolyglycoside, ethoxylated alcohol and linear alkyl alcohol.
    Type: Application
    Filed: April 29, 2003
    Publication date: November 18, 2004
    Inventors: Albert F. Chan, Michael D. Erwin
  • System and method for measuring fluid properties by forming a coaxial transmission line in a cased well
    Patent number: 5926024
    Abstract: Apparatus for insertion in a well which is producing fluids from multiple zones for measuring the concentration of water in the fluids flowing through the well to determine which zone may be producing excessive quantities of water. The apparatus transmits microwave frequency range radiation within a section of the wellbore. The apparatus may utilize a portion of the well casing and a conductor member which is centered in the wellbore by spaced apart centralizers to form a coaxial transmission line within the wellbore. The apparatus may be traversed through the wellbore on a wireline type cable for continuous measurement of the water content of the water-oil mixture flowing through the well to determine which zone is producing excessive amounts of water into the production fluids.
    Type: Grant
    Filed: January 4, 1995
    Date of Patent: July 20, 1999
    Assignee: Atlantic Richfield Company
    Inventors: Curtis G. Blount, James K. Eastlack, Michael D. Erwin