Patents by Inventor Robert L. Thoms

Robert L. Thoms 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).

  • Formation squeeze monitor apparatus
    Patent number: 5105881
    Abstract: A fluid squeeze monitor downhole tool and a method of monitoring formation squeeze features a tool body that can be placed downhole at a desired elevational location to produce a controlled, localized reduction of pressure head and measure the resultant inward displacement of the borehole wall. The reduction in head is accomplished by draining the fluid in a bladder (or collapsible container) located on the tool body into a reservoir "sump" that is incorporated into the downhole tool.
    Type: Grant
    Filed: February 6, 1991
    Date of Patent: April 21, 1992
    Assignee: AGM, Inc.
    Inventors: Robert L. Thoms, Richard M. Gehle
  • Measuring the strength of a rock formation in situ
    Patent number: 3992928
    Abstract: Two hollow cylinders of rock are formed in the rock formation to be tested. A pressure ring is applied to the interior of one of the hollow cylinders of rock, and the ring is pressurized until the cylinder fractures, the highest value of the pressure being recorded as a measure of the tensile strength of the rock. A pressure ring is applied to the exterior of the other hollow cylinder of rock, and the ring is pressurized until the cylinder fractures, the highest value of the pressure being recorded as a measure of the compression strength of the rock.
    Type: Grant
    Filed: November 28, 1975
    Date of Patent: November 23, 1976
    Inventor: Robert L. Thoms