Offshore drilling installation and method for offshore drilling
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United States of America Patent
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Jul 12, 2016
Grant Date -
Nov 5, 2015
app pub date -
Nov 26, 2014
filing date -
Apr 30, 2014
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Abstract
Offshore drilling installation comprising a platform selected from the group comprising a vessel, a pontoon, a jack-up, and further comprising a drill string drivingly connected with said platform and optionally provided with a heave motion compensator, wherein at its lower end the drill string is pro-vided with a drill bit, and wherein a seabed template suspended with lift wires from the platform is placed on a seabed, and wherein clamping means mounted in the seabed template are provided for fixing the drill string relative to the seabed template, which clamping means are embodied as a chuck which is arranged for clamping the drill string whilst enabling the drill string's rotation.
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