Patents by Inventor David G. SHACKELFORD

David G. SHACKELFORD 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).

  • Auto-filling tubulars
    Patent number: 11781388
    Abstract: A method for performing a subterranean operation that can include operations of engaging a tubular with a pipe handler, calculating, via a processor, an internal volume of the tubular, determining, via the processor, a number of pump strokes required to fill at least a percentage of the internal volume with fluid, pumping the fluid to the tubular by running a pump the number of pump strokes, and filling the internal volume of the tubular to at least the percentage of the internal volume with the fluid.
    Type: Grant
    Filed: February 25, 2022
    Date of Patent: October 10, 2023
    Assignee: Nabors Drilling Technologies USA, Inc.
    Inventors: David Hasler, Pradeep Annaiyappa, David G. Shackelford
  • AUTO-FILLING TUBULARS
    Publication number: 20220290515
    Abstract: A method for performing a subterranean operation that can include operations of engaging a tubular with a pipe handler, calculating, via a processor, an internal volume of the tubular, determining, via the processor, a number of pump strokes required to fill at least a percentage of the internal volume with fluid, pumping the fluid to the tubular by running a pump the number of pump strokes, and filling the internal volume of the tubular to at least the percentage of the internal volume with the fluid.
    Type: Application
    Filed: February 25, 2022
    Publication date: September 15, 2022
    Inventors: David HASLER, Pradeep ANNAIYAPPA, David G. SHACKELFORD