Patents by Inventor Alan Terry Hemphill

Alan Terry Hemphill 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 determining sweep efficiency for removing cuttings from a borehole
    Patent number: 6986396
    Abstract: A new method for evaluating the efficiency of a sweep for removing cuttings from a borehole in a subterranean formation during a drilling operation. The method evaluates sweep efficiency on a “mass” in versus “mass out” basis. The method uses downhole density readings taken with a pressure-while-drilling tool inserted in the drill string. Measurements of hydrostatic pressure are converted into equivalent circulating density measurements which in turn are used in calculating the sweep efficiency. The method affords real time estimates at the wellsite of the quantity of formation cuttings brought out of a wellbore by a sweep.
    Type: Grant
    Filed: September 23, 2003
    Date of Patent: January 17, 2006
    Assignee: Halliburton Energy Services, Inc.
    Inventor: Alan Terry Hemphill
  • Method for determining sweep efficiency for removing cuttings from a borehole
    Publication number: 20040060738
    Abstract: A new method is disclosed for evaluating the efficiency of a sweep for removing cuttings from a borehole in a subterranean formation during a drilling operation. The method evaluates sweep efficiency on a “mass in” versus “mass out” basis. The method uses downhole density readings taken with a pressure-while-drilling tool inserted in the drill string. Measurements of hydrostatic pressure are converted into equivalent circulating density measurements which in turn are used in calculating the sweep efficiency. The method affords real time estimates at the wellsite of the quantity of formation cuttings brought out of a wellbore by a sweep.
    Type: Application
    Filed: September 23, 2003
    Publication date: April 1, 2004
    Inventor: Alan Terry Hemphill
  • Method for determining sweep efficiency for removing cuttings from a borehole
    Patent number: 6662884
    Abstract: A new method for evaluating the efficiency of a sweep for removing cuttings from a borehole in a subterranean formation during a drilling operation. The method evaluates sweep efficiency on a “mass in” versus “mass out” basis. The method uses downhole density readings taken with a pressure-while-drilling tool inserted in the drill string. Measurements of hydrostatic pressure are converted into equivalent circulating density measurements which in turn are used in calculating the sweep efficiency. The method affords real time estimates at the wellsite of the quantity of formation cuttings brought out of a wellbore by a sweep.
    Type: Grant
    Filed: November 29, 2001
    Date of Patent: December 16, 2003
    Assignee: Halliburton Energy Services, Inc.
    Inventor: Alan Terry Hemphill
  • Method for determining sweep efficiency for removing cuttings from a borehole
    Publication number: 20030102163
    Abstract: A new method is disclosed for evaluating the efficiency of a sweep for removing cuttings from a borehole in a subterranean formation during a drilling operation. The method evaluates sweep efficiency on a “mass in” versus “mass out” basis. The method uses downhole density readings taken with a pressure-while-drilling tool inserted in the drill string. Measurements of hydrostatic pressure are converted into equivalent circulating density measurements which in turn are used in calculating the sweep efficiency. The method affords real time estimates at the wellsite of the quantity of formation cuttings brought out of a wellbore by a sweep.
    Type: Application
    Filed: November 29, 2001
    Publication date: June 5, 2003
    Inventor: Alan Terry Hemphill