Patent ID: 6045296
Filing Date: 2000-04-04
Classification: E21B

Abstract:
A tensioning device for applying tension to a riser from a deck structure of an offshore oil or gas well, the riser having threads formed on an exterior surface thereof, the tensioning device comprising;a tension ring formed from first and second ring halves that are clamped together about the riser, the first and second halves having inner threads for engaging the threads of the riser, and wherein a clearance exists between the first and second ring halves when the ring halves are clamped together about the riser to allow the first and second ring halves to be tightened against the exterior surface of the riser so that the tension ring is securely fastened to the riser;fastening means for clamping the first and second ring halves together about the riser; andat least one tensioning member that couples at one end to the tension ring and at the other end to the deck structure to thus apply tension to the riser from the deck structure.