Patents by Inventor Hector Ulpiano Caicedo

Hector Ulpiano Caicedo 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).

  • Method for predicting rate of penetration using bit-specific coefficients of sliding friction and mechanical efficiency as a function of confined compressive strength
    Patent number: 7991554
    Abstract: A method for predicting the rate of penetration (ROP) of a drill bit drilling a well bore through intervals of rock of a subterranean formation is provided based on determined relationships between a bit-specific coefficient of sliding friction ? and mechanical efficiency EFFM and confined compressive strength CCS over a range of confined compressive strengths CCS. Confined compressive strength CCS is estimated for intervals of rock through which the drill bit is to be used to drill a well bore. The rate of penetration ROP is then calculated utilizing the estimates of confined compressive strength CCS and those determined relationships.
    Type: Grant
    Filed: June 12, 2008
    Date of Patent: August 2, 2011
    Assignee: Chevron U.S.A. Inc.
    Inventors: William Malcolm Calhoun, Hector Ulpiano Caicedo, Russell Thomas Ewy
  • Method for predicting rate of penetration using bit-specific coefficients of sliding friction and mechanical efficiency as a function of confined compressive strength
    Publication number: 20080249714
    Abstract: A method for predicting the rate of penetration (ROP) of a drill bit drilling a well bore through intervals of rock of a subterranean formation is provided. The method uses an equation based upon specific energy principles. A relationship is determined between a bit-specific coefficient of sliding friction ? and confined compressive strength CCS over a range of confined compressive strengths CCS. Similarly, another relationship for the drill bit is determined between mechanical efficiency EFFM and confined compressive strength CCS over a range of confined compressive strengths CCS. Confined compressive strength CCS is estimated for intervals of rock through which the drill bit is to be used to drill a well bore.
    Type: Application
    Filed: June 12, 2008
    Publication date: October 9, 2008
    Inventors: William Malcolm Calhoun, Hector Ulpiano Caicedo, Russell Thomas Ewy
  • Method for predicting rate of penetration using bit-specific coefficient of sliding friction and mechanical efficiency as a function of confined compressive strength
    Patent number: 7412331
    Abstract: A method for predicting the rate of penetration (ROP) of a drill bit drilling a well bore through intervals of rock of a subterranean formation is provided. The method uses an equation based upon specific energy principles. A relationship is determined between a bit-specific coefficient of sliding friction ? and confined compressive strength CCS over a range of confined compressive strengths CCS. Similarly, another relationship for the drill bit is determined between mechanical efficiency EFFM and confined compressive strength CCS over a range of confined compressive strengths CCS. Confined compressive strength CCS is estimated for intervals of rock through which the drill bit is to be used to drill a well bore.
    Type: Grant
    Filed: December 16, 2004
    Date of Patent: August 12, 2008
    Assignee: Chevron U.S.A. Inc.
    Inventors: William Malcolm Calhoun, Hector Ulpiano Caicedo, Russell Thomas Ewy