Abstract: A shock-absorbing joint absorbs shock forces by distortion of elastomeric material under torque. One form of the shock-absorbing joint has an inner cylinder fitting within an outer cylinder so as to extend longitudinally beyond each end of the outer cylinder and provide an annular space between the cylinders. A body of elastomeric material, such as rubber, fills the annular space and is affixed to the inside surface of the outer cylinder and the outside surface of the inner cylinder. Inner and outer cylinder pivot members are affixed to the inner and outer cylinder, respectively, and are perpendicular to the common pivot axis of the cylinders. Two or three of such shock-absorbing joints may be used to form a shock-absorbing assembly that is particularly useful in protecting marine platforms.

Abstract: An offshore marine combination reach rod and grouting system wherein a reach rod extended from the upper end of an offshore platform leg or piling and piling sleeve to a flood valve connected to the lower end of a leg annulus passes through one or more tee connections as part of a grout feeding system to the leg annulus. The reach rod in the form of a hollow pipe is connected through flexible lines to flush water and grout feeding sources that permit twisting of the reach rod pipe to open and close the flood valve.

Abstract: A diaphragm seal assembly for large tubes such as used as supporting legs in offshore platforms and pile drivers in underwater environments, with the diaphragm seal closure constructed to resist loads retained in such manner as to be nearly completely removed by upward tension pull on a pull-out cable. The diaphragm seal assembly is retained between rings welded inside a tubular member by a split ring forced apart to a retaining diameter by a removable key. Pull on a cable removes the key allowing the split ring to return to its initial smaller diameter size small enough to be removed up out of the tube along with the diaphragm closure member.

Abstract: An offshore deep water marine platform system having pressure feed lines extended from the platform deck to inflatable piling sleeve packers run inside grout supply lines.