Abstract: A method, drill string, bottomhole assembly, drill bit, and insert are for extending a borehole for a relief well in a subsurface. The rotary drill string is provided in the borehole and includes a bottomhole assembly. The bottomhole assembly includes a drill bit. Current is provided into the subsurface using at least one electrode on the drill string, thereby generating current in a casing of a mother well located a distance away from the borehole of the relief well. At least one component of a magnetic field associated with the current generated in the casing is detected using at least one sensor disposed on the drill string. Data is obtained from the sensor for determining either or both the proximity and direction to the mother well. The drill string is advanced into the subsurface based upon the obtained data to extend the borehole.

Abstract: A method, drill string, bottomhole assembly, drill bit, and insert are for extending a borehole for a relief well in a subsurface. The rotary drill string is provided in the borehole and includes a bottomhole assembly. The bottomhole assembly includes a drill bit. Current is provided into the subsurface using at least one electrode on the drill string, thereby generating current in a casing of a mother well located a distance away from the borehole of the relief well. At least one component of a magnetic field associated with the current generated in the casing is detected using at least one sensor disposed on the drill string. Data is obtained from the sensor for determining either or both the proximity and direction to the mother well. The drill string is advanced into the subsurface based upon the obtained data to extend the borehole.

Abstract: The invention is a method for mooring a marine vessel (P) using three or more anchor lines (11a, 11b, . . . ) comprising—laying out each anchor line (11) with an anchor in a desired position relative to the platform, with a seabed anchor chain (10) extending towards the desired position of the platform (P), with the seabed chain (10) connected to a fiber rope's (20) arranged for being extended through the sea and connected to an anchor winch chain (30) and being tightended by an anchor winch (31) on the vessel (P), wherein the fiber rope (20) is prepared by being packed to a bundle or coil (21) arranged in a protective container (24) on the seafloor, and arranged for being released and pulled out of the container (24) at a predetermined pulling force, and arranged for being picked up and connected to the anchor winch chain (30).

Abstract: The invention is a method for mooring a marine vessel (P) using three or more anchor lines (11a, 11b, . . . ) comprising—laying out each anchor line (11) with an anchor in a desired position relative to the platform, with a seabed anchor chain (10) extending towards the desired position of the platform (P), with the seabed chain (10) connected to a fibre rope's (20) arranged for being extended through the sea and connected to an anchor winch chain (30) and being tightened by an anchor winch (31) on the vessel (P), wherein the fibre rope (20) is prepared by being packed to a bundle or coil (21) arranged in a protective container (24) on the seafloor, and arranged for being released and pulled out of the container (24) at a predetermined pulling force, and arranged for being picked up and connected to the anchor winch chain (30).