Atp Oil & Gas Corporation

Daniel H Longwell

Robert Magee Shivers, Iii

David Trent

A floating vessel for supporting top tension drilling and production risers having a hull and an operation deck disposed on top of the hull. A tensioner assembly for moveably carrying a conductor that communicates from a wellhead to a piece of well access equipment. The well access equipment is connected to the floating vessel. The tensioner assembly is supported by the floating vessel.

Floating vessel for supporting top tension drilling and production risers

A tensioner assembly for moveably carrying a conductor that communicates from a wellhead to a piece of well access equipment on a rig. The tensioner assembly includes a support frame, at least one hydraulic cylinder connected to the support frame, and at least one primary accumulator in fluid communication with the hydraulic cylinder.

Tensioner assembly

A method for supporting top tension drilling and production risers on a floating vessel using a tensioner assembly above the water line of the vessel. The method can include attaching at least one hydraulic cylinder on a first end to a first position on a floating vessel and on a second end to a tension frame below the first position. The next step of the method can be forming a fluid connection between the at least one hydraulic cylinder and at least one primary accumulator.

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Houston, TX, United States of America

Daniel H Longwell