Patents by Inventor Philip Head

Philip Head 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 of accessing a sub sea well and a guide arrangement therefor
    Patent number: 5749676
    Abstract: A system for accessing a subsea well in which a guide on a buoy system is tethered to the well head and the buoy is evacuated to render the guide arrangement rigid and a flexible coil tubing from a surface vessel above the well head is guided through this arrangement to the well head while adjustable buoyancy is provided along the flexible tubing between the vessel and the well head for controlling the profile of the tubing.
    Type: Grant
    Filed: January 18, 1996
    Date of Patent: May 12, 1998
    Inventor: Philip Head
  • Dissolvable grip or seal arrangement
    Patent number: 5709269
    Abstract: The invention relates to an releasable grip arrangement providing an impermeable barrier in an annular space between an inside tube and an outside tube of an oil well and is made of a material which may be dissolved by a suitable solvent and includes a seal member and a locking member 3, a sleeve which comprises holes which can be blocked during normal use but can be opened to permit the entrance of a solvent.
    Type: Grant
    Filed: December 6, 1995
    Date of Patent: January 20, 1998
    Inventor: Philip Head
  • System for controlling the flow of fluid in an oil well
    Patent number: 5673751
    Abstract: A device is provided for controlling fluid flow in oil well casings or drill pipes. The device defines a flowpath for fluid through a casing section or drill pipe with the flowpath including a throttling valve which restricts or prevents the flow of fluid therethrough. This can be used to prevent U-tubing in casings or can be used to locate leaks in drill pipes or can be used to monitor the position of successive fluids of differing viscosities in a casing string.
    Type: Grant
    Filed: April 7, 1995
    Date of Patent: October 7, 1997
    Assignee: Stirling Design International Limited
    Inventors: Philip Head, Paul Gullett, Paul Wilmott
  • Tube assembly for servicing a well head and having an inner coil tubing injected into an outer coiled tubing
    Patent number: 5671811
    Abstract: A tube assembly for servicing a well head injects an inner continuous coil tubing into an outer continuous coil tubing which can be connected at one end to a well head of an oil or gas reservoir. The inner coiled tubing can be connected to a tool string for servicing the well.
    Type: Grant
    Filed: January 18, 1996
    Date of Patent: September 30, 1997
    Inventor: Philip Head
  • Device for controlling the flow of fluid in an oil well
    Patent number: 5404945
    Abstract: A device is provided for controlling fluid flow in oil well casings or drill pipes. The device defines a flowpath for fluid through a casing section or drill pipe with the flowpath including a throttling valve which restricts or prevents the flow of fluid therethrough. This can be used to prevent U-tubing in casings or can be used to locate leaks in drill pipes or can be used to monitor the position of successive fluids of differing viscosities in a casing string.
    Type: Grant
    Filed: December 29, 1992
    Date of Patent: April 11, 1995
    Assignee: Stirling Design International Limited
    Inventors: Philip Head, Paul Gullett, Paul Wilmott