Abstract: Offshore well drivepipe or caisson may be supported by a skeletal frame type supported having spaced apart caisson receiving guide sleeves and spaced apart sets of pile guide sleeves interconnected by lateral and diagonal brace members. The support may be totally submerged and sleeved over the caisson while resting on the seabed and secured thereto by conventional piles which are installed through the pile guide sleeves and driven to temporary or permanent depth. The support structure provides a low-cost, reusable, temporary or permanent support for well caissons or drivepipes.

Abstract: A jacket for supporting an offshore platform or the like comprises at least one vertical column member, laterally and vertically spaced guide sleeves for piles to be driven into the sea floor and lateral bracing connecting the guide sleeves to the column member. The jacket may be installed with the piles prepositioned extending through the guide sleeves and temporarily secured thereto until the jacket and pile assembly is in position on the sea floor and ready for pile driving. The vertical column member may receive a pile which may include a well casing. A method of installation for the jacket may include drilling a well through the column member after installation of the jacket and securement to the sea floor by the piles which extend through the guide sleeves.