Robert L. Pierce
Engineering at Chaffin St, Houston, TX

4634314, Jan 6, 1987

Jun 26, 1984

6/624621

Robert H. Pierce - Houston TX

Vetco Offshore Inc. - Ventura CA

E21B 1701

405195

Tubular marine riser sections are formed by a wound or woven filament-resin matrix tubular body having a modulus of elasticity in tension of about 27,000,000 psi or greater utilizing carbon or boron for the filament material. The riser sections may be provided with end couplings secured to the tubular body for forming a riser system wherein the tensile strength or load bearing capacity of each section and its hydrostatic collapse resistance may be selectively determined by its position in the riser system. The riser sections may be provided with cylindrical collapse resisting ribs defining spaced buoyancy chambers filled with low density material contained by an outer shell formed of a glass or aramid fiber-resin matrix composite having a lower modulus of elasticity in tension than the primary load bearing tubular member. An inner abrasion and fluid impervious sleeve is disposed within the tubular body but is not bonded thereto. Multiple conduit riser sections may be utilized as anchoring members for a floating platform and the like.

4821804, Apr 18, 1989

Apr 26, 1988

7/186752

Robert H. Pierce - Houston TX

E21B 712

166367

An offshore fixed platform support column assembly for deep water hydrocarbon development and production systems comprises an elongated cylindrical composite column which extends upward from a base assembly made up of a central cylindrical reinforced concrete caisson and one or more clusters of cylindrical reinforced concrete storage tanks to a point just below the sea surface. The column is made up of members having wound filament-resin composite cylindrical walls coupled end to end by coupling members which transmit tensile, bending and compressive loads between a platform structure supported at the upper end of the column assembly and the base assembly. The column members may include outer reinforced plastic shells forming buoyancy chambers which are filled with an expanded foam plastic buoyancy material. The column members may include reinforced concrete inner cylinder liners for transferring the static weight of the platform assembly to the seabed through the assembly of the central caisson and the anchor members. In one embodiment the column assembly terminates at its upper end several hundred feet below the surface and is adapted to anchor a submersible vessel by anchor cables which descend through corner support columns of the vessel and are secured to the upper end of the column assembly.