Patents by Inventor Darrell P. Davis

Darrell P. Davis 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).

  • Sealing by ball sealers
    Patent number: 9316087
    Abstract: In downhole treatments in the oilfield, ball sealers seated in perforations may not fully seal and may leak fluid through gaps and asperities between the balls and the perforations. A method is given for improving the sealing of ball sealers in perforations by adding a sealing agent that forms a plug in the gaps and severely restricts or eliminates fluid flow. The sealing agent is preferably degradable or soluble, malleable fibers slightly larger than the gaps. Optionally, the particles may be non-degradable, rigid, of different shapes, and smaller than the gaps but able to bridge them. Mixtures of sealing agents may be used. The sealing agent may be added with the ball sealers, after the ball sealers, or both.
    Type: Grant
    Filed: January 20, 2015
    Date of Patent: April 19, 2016
    Assignee: SCHLUMBERGER TECHNOLOGY CORPORATION
    Inventors: Curtis L. Boney, Jason Swaren, John Lassek, Ricardo Ariza, Desmond E. Rees, David Ryan Simon, Michael A. Dardis, Darrell P. Davis
  • Diversion by combining dissolvable and degradable particles and fibers
    Patent number: 9212535
    Abstract: In downhole treatments in the oilfield, ball sealers seated in perforations may not fully seal and may leak fluid through gaps and asperities between the balls and the perforations. A method is given for improving the sealing of ball sealers in perforations by adding a sealing agent that forms a plug in the gaps and severely restricts or eliminates fluid flow. The sealing agent is preferably degradable or soluble, malleable fibers slightly larger than the gaps. Optionally, the particles may be non-degradable, rigid, of different shapes, and smaller than the gaps but able to bridge them. Mixtures of sealing agents may be used. The sealing agent may be added with the ball sealers, after the ball sealers, or both.
    Type: Grant
    Filed: January 27, 2011
    Date of Patent: December 15, 2015
    Assignee: Schlumberger Technology Corporation
    Inventors: Philipp Tippel, Elizabeth W. A. Morris, Curtis L. Boney, Jason Swaren, John Lassek, Ricardo Ariza, Desmond E. Rees, David Ryan Simon, Michael A. Dardis, Darrell P. Davis
  • SEALING BY BALL SEALERS
    Publication number: 20150129214
    Abstract: In downhole treatments in the oilfield, ball sealers seated in perforations may not fully seal and may leak fluid through gaps and asperities between the balls and the perforations. A method is given for improving the sealing of ball sealers in perforations by adding a sealing agent that forms a plug in the gaps and severely restricts or eliminates fluid flow. The sealing agent is preferably degradable or soluble, malleable fibers slightly larger than the gaps. Optionally, the particles may be non-degradable, rigid, of different shapes, and smaller than the gaps but able to bridge them. Mixtures of sealing agents may be used. The sealing agent may be added with the ball sealers, after the ball sealers, or both.
    Type: Application
    Filed: January 20, 2015
    Publication date: May 14, 2015
    Inventors: Curtis L. Boney, Jason Swaren, John Lassek, Ricardo Ariza, Desmond E. Rees, David Ryan Simon, Michael A. Dardis, Darrell P. Davis
  • DIVERSION BY COMBINING DISSOLVABLE AND DEGRADABLE PARTICLES AND FIBERS
    Publication number: 20110226479
    Abstract: In downhole treatments in the oilfield, ball sealers seated in perforations may not fully seal and may leak fluid through gaps and asperities between the balls and the perforations. A method is given for improving the sealing of ball sealers in perforations by adding a sealing agent that forms a plug in the gaps and severely restricts or eliminates fluid flow. The sealing agent is preferably degradable or soluble, malleable fibers slightly larger than the gaps. Optionally, the particles may be non-degradable, rigid, of different shapes, and smaller than the gaps but able to bridge them. Mixtures of sealing agents may be used. The sealing agent may be added with the ball sealers, after the ball sealers, or both.
    Type: Application
    Filed: January 27, 2011
    Publication date: September 22, 2011
    Inventors: Philipp Tippel, Elizabeth W.A. Morris, Curtis L. Boney, Jason Swaren, John Lassek, Ricardo Ariza, Desmond E. Rees, David Ryan Simon, Michael A. Dardis, Darrell P. Davis