Patents Represented by Attorney Steve Schlather

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  • Pivoting gooseneck
    Patent number: 6923253
    Abstract: A gooseneck for coiled tubing operations have a folding design to allow for a more compact design for storage and transport. The gooseneck may remain attached to the injector during transport, thereby decreasing the equipment required to move and set-up the coiled tubing equipment. The gooseneck includes a linkage mechanism for connecting a pair of support struts between the injector body and the tubing guide. The linkage allows the guide to follow a substantially parabolic path as it tracks the tubing from the reel to the injector.
    Type: Grant
    Filed: August 30, 2002
    Date of Patent: August 2, 2005
    Assignee: Schlumberger Technology Corporation
    Inventors: Vishal Saheta, Rod Shampine, Yarom Polsky
  • Method of predicting friction pressure drop of proppant-laden slurries using surface pressure data
    Patent number: 6863128
    Abstract: The present invention relates to a method of determining the proppant friction generated in a fracture of a subterranean formation during a hydraulic fracturing treatment involving injection stages of pad and of proppant-laden fluids. This method is based on close monitoring of surface pressure to define a “net pressure rate” which defines an increase or decrease of net pressure while the job is being pumped, and then relates it with the pressure changes observed with the onset of proppant stages of varying concentrations.
    Type: Grant
    Filed: October 22, 2002
    Date of Patent: March 8, 2005
    Assignee: Schlumberger Technology Corporation
    Inventors: Vibhas Pandey, Curtis L. Boney