Patents by Inventor Gordon W. Craig

Gordon W. Craig 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).

  • Publication number: 20080238094
    Abstract: A threaded connector 10 includes a box connector 12 having internal threads 18 and a pin connector 14 having external threads 26 for mating with the internal threads. An axially opposing end 34 of the box connector includes a projecting ring 36 extending axially opposite the box weld end with respect to the internal threads. The pin connector 14 has an annular slot 40 for receiving the projecting ring 36, with the slot having an inner wall 44, an outer wall 42, and a base surface 46. At least one of the radially outer surface 60 of the pin connector and the radially inner surface 64 of the box connector is a radiused surface.
    Type: Application
    Filed: March 28, 2007
    Publication date: October 2, 2008
    Inventors: Gordon W. Craig, Matthew A. Hegler
  • Patent number: 5417281
    Abstract: A downhole submersible fluid pump having a progressive cavity motor section and a progressive cavity pump section. In each section the rotor is fixed and the pumping action occurs by forcing power fluid into the motor chamber around the rotor which action causes the normally fixed stator to rotate around relative to the fixed rotor. This rotary motion is transmitted via the housing to the pump stator formed internally thereof which rotates relative to another fixed rotor drawing fluids from the subterranean formation upwardly as produced fluids.
    Type: Grant
    Filed: February 14, 1994
    Date of Patent: May 23, 1995
    Assignee: Steven M. Wood
    Inventors: Steven M. Wood, Gordon W. Craig