Patents Represented by Attorney Douglas Y'Barbo, Esq.
  • Patent number: 6060436
    Abstract: The crosslinking of galactomannan gum fracturing fluids by borate ion is delayed for high temperature applications by completing boron in a basic solution with an organic polyol. Low pumping friction pressures are achieved by the delay in the crosslinking with the boron being available at high temperatures to add high temperature stability to the fracturing fluid at temperatures ranging upto about 300.degree. F.
    Type: Grant
    Filed: August 6, 1996
    Date of Patent: May 9, 2000
    Assignee: Schlumberger Technology Corp.
    Inventors: Travis C. Snyder, Dustin L. Free, Stanley Bruce McConnell, Brian R. Ainley
  • Patent number: 5964295
    Abstract: The improved recovery of hydrocarbons from subterranean formations by hydraulically fracturing a subterranean formation is accomplished. Fracturing fluids using a viscoelastic surfactant fluid containing wormlike micelles are useful to improve recovery of hydrocarbons and limit the loss of fracturing fluid into the formation fracture face. The invention further relates to novel fracturing methods useful for increasing hydrocarbon production, limiting connate water production, resisting fracturing fluid loss into the subterranean formation, and reducing the equipment requirements in mixing and pumping fracturing fluid. The action of micelles of surfactant in aqueous zones of the subterranean formation facilitates the flowback of increased amounts of hydrocarbons once a fractured well is placed back on production.
    Type: Grant
    Filed: October 9, 1996
    Date of Patent: October 12, 1999
    Assignee: Schlumberger Technology Corporation, Dowell division
    Inventors: J. Ernest Brown, Roger J. Card, Erik B. Nelson