Patents by Inventor Sigifredo Alvarado

Sigifredo Alvarado 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).

  • Method for securing a damaged wellhead
    Patent number: 8074722
    Abstract: A technique for securing a subsea well that has had some of its components damaged as a result of a storm or other catastrophic event. The techniques utilizes a casing head assembly that may secured to the casing of the damaged well by tightening a plurality of set screws to drive slips into the casing. The casing head assembly may also comprise a tubing hanger. Tubing head set screws may then be tightened to activate the tubing hanger to secure the production tubing to the casing head. The casing head assembly may also comprise a latch-lock connector that may be secured to the casing head by stabbing the latch-lock connector into the casing head and rotating the connector approximately one-quarter turn. A corrosion cap may then be secured to the latch-lock connector to cover the end of the production tubing.
    Type: Grant
    Filed: February 7, 2008
    Date of Patent: December 13, 2011
    Assignee: Vetco Gray Inc.
    Inventors: John M. Murphy, Jr., Ronald C. Gilbert, Sigifredo Alvarado
  • SYSTEM AND METHOD FOR SECURING TO A DAMAGED WELLHEAD
    Publication number: 20090200039
    Abstract: A technique is provided for securing a subsea well that has had some of its components damaged as a result of a storm or other catastrophic event. The techniques utilizes a casing head assembly that may secured to the casing of the damaged well by tightening a plurality of set screws to drive slips into the casing. The casing head assembly may also comprise a tubing hanger. Tubing head set screws may then be tightened to activate the tubing hanger to secure the production tubing to the casing head. The casing head assembly may also comprise a latch-lock connector that may be secured to the casing head by stabbing the latch-lock connector into the casing head and rotating the connector approximately one-quarter turn. A corrosion cap may then be secured to the latch-lock connector to cover the end of the production tubing.
    Type: Application
    Filed: February 7, 2008
    Publication date: August 13, 2009
    Inventors: John M. Murphy, JR., Ronald C. Gilbert, Sigifredo Alvarado