May 20, 2008


Description

The increased interest in floater designs for ultra-deep water has produced a number of dry tree semisubmersible designs that allow the use of top tensioned risers (TTRs).  The primary advantage in using TTRs is that they facilitate direct vertical access to production wells and thereby offer access for well completions and interventions.  The principle behind several of the dry tree semisubmersible designs is to reduce the motions of a traditional shaped semisubmersible to a level that can accommodate TTRs.  This is accomplished by using heave plates that are positioned beneath the semisubmersible hull and are supported by a lower structure, such as a truss.  To a certain extent, the motion responses above and below the response amplitude operator (RAO) cancellation period can be manipulated by designing the relative sizes of the pontoons and columns as well as the size and depth of the heave plates such that the sum of the forces interact to minimize the heave motion.  This presentation looks beyond the traditional solutions.  It presents and discusses the design and performance of two dry tree semisubmersible designs that use heave plates to reduce heave motion the ESEMI II (E SEMI) and the Truss Semisubmersible (Truss Semi).  The analysis demonstrates the sensitivities in the geometry of the hull design and how they can be used to optimize the heave response.
Note:  Pre-registration is strongly encouraged.  
              Seating for walk-ins will be limited.

Featured Speakers

Speaker Dr. John Murray
Director of Technology Development, FloaTEC, LLC  Dr. John Murray has over 25 years experience working on offshore structure designs for open water and ice covered regions.  He started his career with the National Research Council Canada 1997 where he was Head of the Ocean Engineering Program responsible for the Council’s …

Director of Technology Development,
FloaTEC, LLC
 Dr. John Murray has over 25 years experience working on offshore structure designs for open water and ice covered regions.  He started his career with the National Research Council Canada 1997 where he was Head of the Ocean Engineering Program responsible for the Council’s national offshore development program.  In 1997 he joined Spars International Inc. in Houston.  For the past 11 years, he has worked primarily in concept development for deepwater floaters and riser designs, both as a Principal Engineer with Technip Offshore and since 2006 as Director of Technology Development with FloaTEC, LLC.  Murray holds a PhD in Ocean Engineering, has published over 100 technical papers in journals and conference proceedings, and holds a number of patents. He is a registered professional engineer in Canada and the State of Texas.

Full Description



Organizer

Maria Cabello


Date and Time

Tue, May 20, 2008

11:30 a.m. - 1 p.m.
(GMT-0500) US/Central

Event has ended

Location

Houston Racquet Club

10709 Memorial Drive
Houston,, TX 77024