Patents by Inventor Calum J. B. Dinnes

Calum J. B. Dinnes 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).

  • Adjustable jackup drilling system hanger
    Patent number: 5653289
    Abstract: A casing tensioning system applies tension to a string of casing between a subsea wellhead and a surface wellhead. The tensioning system has an outer hanger with a load ring and a ratchet ring that engage a mandrel. The mandrel is connected into the string of casing. The outer hanger has a disengaged position and an engaged position. When running, the outer hanger lands on a load shoulder in the surface wellhead while the casing hanger is in the disengaged position. The operator subsequently lowers the casing and latches the casing to the subsea wellhead. The operator then removes the casing running tool. The operator sets an annulus seal using a seal running tool. The annulus seal actuates a release member to cause the ratchet ring to move to the collapsed engaged position. After the seal is set the operator pulls tension on the casing.
    Type: Grant
    Filed: November 14, 1995
    Date of Patent: August 5, 1997
    Assignee: ABB Vetco Gray Inc.
    Inventors: Stanley Hosie, Iain M. Oswald, Trevor W. J. Park, Calum J. B. Dinnes
  • Adjustable surface well head casing hanger
    Patent number: 5439061
    Abstract: A surface wellhead system for a subsea well utilizes a two-piece casing hanger. The casing hanger has an inner member that secures to a string of casing that extends from the sea floor to a surface casing head. The outer member of the casing hanger is axially adjustable relative to the inner member and will hold tension in the casing. The outer member lands on a load shoulder in the casing head. An annulus outer seal seals between the exterior of the outer member and the bore of the casing head. An inner seal seals between the inner member and the bore of the outer member.
    Type: Grant
    Filed: August 3, 1994
    Date of Patent: August 8, 1995
    Assignee: ABB Vetco Gray Inc.
    Inventors: Norman Brammer, Calum J. B. Dinnes, Stanley Hosie, Trevor W. J. Park
  • Contingency tieback adapter
    Patent number: 5368335
    Abstract: A tieback system for a subsea well employs a tieback member that can be utilized in the event tieback threads in the casing hanger become damaged. An annular groove is formed in the bore of the wellhead housing above the casing hanger. The tieback member connects to tieback conduit and has a lower end that slides into the interior of the casing hanger. A locking device will lock the tieback member to the groove in the wellhead housing. The locking device includes a retainer which carries a radially movable locking members that are cammed outward by downward movement of the tieback member relative to the retainer.
    Type: Grant
    Filed: November 2, 1992
    Date of Patent: November 29, 1994
    Assignee: ABB Vetco Gray Inc.
    Inventor: Calum J. B. Dinnes