Patents by Inventor Derek F. Herrera

Derek F. Herrera 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).

  • Non threaded drill pipe connection
    Patent number: 8474879
    Abstract: A threadless connection for coupling segments of pipe longitudinally end to end includes a pin end having a groove for receiving therein a locking ring. A box end has a groove for receiving the locking ring therein when the pin end is inserted into the box end. The locking ring has an uncompressed diameter selected to exert lateral force on the groove in the box end when assembled to the pin end.
    Type: Grant
    Filed: August 3, 2011
    Date of Patent: July 2, 2013
    Inventor: Derek F. Herrera
  • Non Threaded Drill Pipe Connection
    Publication number: 20120049513
    Abstract: A threadless connection for coupling segments of pipe longitudinally end to end includes a pin end having a groove for receiving therein a locking ring. A box end has a groove for receiving the locking ring therein when the pin end is inserted into the box end. The locking ring has an uncompressed diameter selected to exert lateral force on the groove in the box end when assembled to the pin end.
    Type: Application
    Filed: August 3, 2011
    Publication date: March 1, 2012
    Inventor: Derek F. Herrera
  • Running bore-lining tubulars
    Patent number: 7849927
    Abstract: A method of running a tubular string into a wellbore comprises running a bore-lining tubular string into a wellbore substantially without rotation, while rotating a cutting structure at a distal leading end of the tubular string. Other methods provide for rotation of the string and the provision of a non-rotating stabiliser towards the leading end of the string.
    Type: Grant
    Filed: June 26, 2008
    Date of Patent: December 14, 2010
    Assignee: Deep Casing Tools Ltd.
    Inventor: Derek F. Herrera
  • RUNNING BORE-LINING TUBULARS
    Publication number: 20090159281
    Abstract: A method of running a tubular string into a wellbore comprises running a bore-lining tubular string into a wellbore substantially without rotation, while rotating a cutting structure at a distal leading end of the tubular string. Other methods provide for rotation of the string and the provision of a non-rotating stabiliser towards the leading end of the string.
    Type: Application
    Filed: June 26, 2008
    Publication date: June 25, 2009
    Inventor: Derek F. Herrera
  • TURBULENT FLOW TOOL
    Publication number: 20090146381
    Abstract: An apparatus (10) for mounting on a tubular (12) for location in a bore comprises a seal comprising a swelling sealing material adapted to permit passage of fluid cement between the tubular and the surrounding bore wall which is void of set cement. Alternatively, the sealing material may expand into a space between the tubular and surrounding set cement.
    Type: Application
    Filed: February 13, 2009
    Publication date: June 11, 2009
    Inventor: Derek F. Herrera