Abstract: A marine riser system, a buoyancy system, and a method of buoying a body. A riser joint includes a body, a buoyancy module, a thrust collar, and a reaction collar. The buoyancy module is coupled around the body and configured to produce a buoyant force when submerged at a subsea location. The thrust collar is coupled around the body and engaged with the buoyancy module to transfer the buoyant force to the body. The reaction collar is engaged with the body such that movement of the buoyancy module is restricted by the reaction collar.

Abstract: A marine riser system, a buoyancy system, and a method of buoying a body. A riser joint includes a body, a buoyancy module, a thrust collar, and a reaction collar. The buoyancy module is coupled around the body and configured to produce a buoyant force when submerged at a subsea location. The thrust collar is coupled around the body and engaged with the buoyancy module to transfer the buoyant force to the body. The reaction collar is engaged with the body such that movement of the buoyancy module is restricted by the reaction collar.

Abstract: The present disclosure generally relates to a riser system for coupling a surface platform to a wellhead and, in an embodiment described herein, more particularly provides a riser flange for coupling adjacent riser sections. A main tube of the riser system forms an annulus for fluid flow between the wellhead and the platform. A flange extends radially from each end of the main tube. The flange includes an offset outer face and a raised inner face. The flange further includes a plurality of bolt and auxiliary line holes distributed about the flange. The bolt holes are all located within the raised inner face of the flange. The bolt holes are angled with respect to the axis of the main tube. A transition between the main tube and riser flange is gradually tapered and convex.

Abstract: The present disclosure generally relates to a riser system for coupling a surface platform to a wellhead and, in an embodiment described herein, more particularly provides a riser flange for coupling adjacent riser sections. A main tube of the riser system forms an annulus for fluid flow between the wellhead and the platform. A flange extends radially from each end of the main tube. The flange includes an offset outer face and a raised inner face. The flange further includes a plurality of bolt and auxiliary line holes distributed about the flange. The bolt holes are all located within the raised inner face of the flange. The bolt holes are angled with respect to the axis of the main tube. A transition between the main tube and riser flange is gradually tapered and convex.

Abstract: A corrosion inhibiting liner for a pipe support includes a flexible mat containing spaced-apart slots; and a cylindrically-curved buffer in tight engagement with the mat in each slot, wherein the cylindrically-curved buffer is made of a non-metallic, non-elastomer material that can withstand compressive strength of at least 8,000 psi, and has a friction coefficient less than 0.35. The slots are dove-tail slots, and the greatest thickness of the mat combined with a buffer is less than three-fourths of an inch. The length of each buffer is substantially the same, and is within the range of 1.5 inch to 24 inches.

Abstract: A cathodic protection system for protecting an underwater structure includes a plurality of blocks which are capable of conforming to various structures. Each of the blocks include: a flexible wire rope, the rope constructed and arranged to pass through the center of each block in two directions, and embedded therein to fasten the blocks to each other by rows and columns; a sacrificial anode embedded in at least one of the blocks, and electrically attached inside the block to the flexible wire rope; and a connecting system electrically attached to the wire rope and to the underwater structure. Each block has a non-abrasive pad attached to it. The pad provides spacing between the block and the underwater structure. The system includes means for collecting performance data from the system. The sacrificial anode is made of a composition taken from the group comprising alloys of: zinc, aluminum, or magnesium.

Abstract: A cathodic protection system for protecting an underwater structure includes a plurality of blocks which are capable of conforming to various structures. Each of the blocks include: a flexible wire rope, the rope constructed and arranged to pass through the center of each block in two directions, and embedded therein to fasten the blocks to each other by rows and columns; a sacrificial anode embedded in at least one of the blocks, and electrically attached inside the block to the flexible wire rope; and a connecting system electrically attached to the wire rope and to the underwater structure. Each block has a non-abrasive pad attached to it. The pad provides spacing between the block and the underwater structure. The system includes means for collecting performance data from the system. The sacrificial anode is made of a composition taken from the group comprising alloys of: zinc, aluminum, or magnesium.

Abstract: A corrosion inhibiting liner for a pipe support includes a flexible mat containing spaced-apart slots; and a cylindrically-curved buffer in tight engagement with the mat in each slot, wherein the cylindrically-curved buffer is made of a non-metallic, non-elastomer material that can withstand compressive strength of at least 8,000 psi, and has a friction coefficient less than 0.35. The slots are dove-tail slots, and the greatest thickness of the mat combined with a buffer is less than three-fourths of an inch. The length of each buffer is substantially the same, and is within the range of 1.5 inch to 24 inches.