Patents by Inventor Samuel D. Pelley

Samuel D. Pelley 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).

  • Encapsulated enzyme breaker and method for use in treating subterranean formations
    Patent number: 5604186
    Abstract: The present invention relates to a method of preparing an encapsulated enzyme breaker and method of use in treating a subterranean formation. An encapsulated breaker is prepared by coating an enzyme on a cellulose substrate. A micron-sized particulate is admixed with the enzyme solution to prevent undesired agglomeration of the substrate. The enzyme solution coated substrate is covered with a membrane comprising a partially hydrolyzed acrylic crosslinked with either an aziridine prepolymer or a carbodiimide. The membrane contains imperfections through which an aqueous fluid may pass into the breaker to contact the enzyme and diffuse the enzyme outward from the breaker particle.
    Type: Grant
    Filed: February 15, 1995
    Date of Patent: February 18, 1997
    Assignee: Halliburton Company
    Inventors: Charles V. Hunt, Ronald J. Powell, Michael L. Carter, Samuel D. Pelley, Lewis R. Norman
  • Perphosphate viscosity breakers in well fracture fluids
    Patent number: 5386874
    Abstract: The present invention relates to: i) fracture fluid compositions for fracturing subterranean formations to enhance production of fluids from wells in which the viscosity breaker is one or more esters or amides of the perphosphate ion, and to: ii) fracturing processes using fracture fluids comprising esters or amides of the perphosphate ion.
    Type: Grant
    Filed: November 8, 1993
    Date of Patent: February 7, 1995
    Assignee: Halliburton Company
    Inventors: Steven B. Laramay, Ronald J. Powell, Samuel D. Pelley