Abstract: Disclosed is a method and apparatus for cutting piling and conductors extending into the sea floor from an offshore platform. A window is cut into the piling to permit access to the stabbing point which is then removed. The piling is washed out to remove sand and mud at least to the depth where the cut is to be made. A cutter/pinning device is lowered to the disired elevation of cut. Once the cutter/pinning device is properly positioned, engaging pistons are driven radially outward from the cutter/pinning device to engage the walls of the piling, preferably both above and below the line of cut. A series of radially disposed torches or explosives within the cutter/pinning device are then ignited to burn or blow a circumferential cut in the piling at the desired elevation of cut which will typically be twenty feet below the mud line.

Abstract: An improved, slow burning jet embedded anchor assembly for use in sedimentary strata and similarly nonconsolidated or rocky ocean bottom surfaces is shown. The anchor comprises an inertially loaded reaction member above a substantially elongated anchor shaft, coaxially positioned around an elongated drive tube assembly. The anchor shaft has a number of open cross-section triangular sheet metal anchoring fins, providing substantially low resistance to penetration within the strata, but providing substantially high resistance to sideways displacement forces, as would be imposed through a standard anchor rod. The anchor is positioned by lowering the inertial reaction unit and embedded by the weight of the inertial reaction unit a distance into the surface layer of the subocean strata. An internal detonator control assures vertical embedment unless the anchor is vertically positioned. The anchor is remotely fired after initial embedment.

Abstract: An improved, explosively embedded anchor assembly for use in sedimentary strata and similarly nonconsolidated or rocky ocean bottom surfaces is shown. The anchor comprises an inertially loaded reaction member above a substantially elongated anchor shaft, coaxially positioned around an elongated drive tube assembly. The anchor shaft has a number of open cross-section triangular sheet metal anchoring fins, providing substantially low resistance to penetration within the strata, but providing substantially high resistance to sideways displacement forces, as would be imposed through a standard anchor rode. The anchor is positioned by lowering the inertial reaction unit and embedded by the weight of the inertial reaction unit a distance into the surface layer of the subocean strata. An internal detonator control assures vertical embedment unless the anchor is vertically positioned. The anchor is remotely fired after initial embedment.