Page 12: of Maritime Reporter Magazine (June 2, 2010)

12 Maritime Reporter & Engineering News

NEWS FEATURE SHIP: THE COMPACT SEMI SUBMERSIBLE

Hallin Marine has commissioned a unique, $110m semi-submersible, subsea operations vessel to be named the CSS

Derwent. “The CSS (compact semi sub- mersible) delivers big ship capability in a low cost package,” said John Giddens,

Hallin’s CEO. “It will support the oil op- erators’ desire to improve production and reduce costs.”

The 84 m CSS is the culmination of a five-year project designed to deliver ‘large boat capability’ at a price of a smaller vessel with a primary focus on light well intervention. Hallin and its partners have achieved the goal by de- signing a vessel that uses a semi-sub- mersible style hull to provide exceptional seakeeping characteristics, increased deck space and good project load carry- ing capacity. The result is the CSS Der- went, a dynamically positioned class 3 (DP3) vessel fitted with a 200 ton multi- purpose tower, a 150 ton active heave crane, both operational to depths of 3,000 m; along with two deep water construc- tion class ROVs. CSS Derwent boasts two moon pools, accommodation for 152 personnel and the operational deck space comparable to a 120-m vessel.

Designed by STX Canada Marine Inc., the diesel/electric CSS’s primary function is to facilitate repair and maintenance to an existing well, via chemical injection on braided lines, extending perforation tunnels and effectively maximizing and extending the productive life of the well.

The CSS will be equipped with four fixed-pitch Azimuth thruster units and full DP-3 capacity. “It will enable the marine equivalent of keyhole surgery to sub-sea oil production systems,” said Denis Welch, CEO of Dry- docks World – South East Asia. “This is an exciting first for Drydocks World, also the first of its kind to be manufactured in

Batam.

Other features of the 84 m, 8,200 dwt vessel include an active heave-compen- sated offshore crane, a single line lifting of SWL (Safe Working Load) 150 tons, a complete active heave-compensated, electro-hydraulic Deep Water Lowering

System, a five tons provision crane and two ROV systems, one launched via the internal moonpool and the other from the vessel’s starboard. The CSS can accom- modate up to 152 sub-sea team members.

Key to the diesel electric powered CSS

Derwent’s success will be its strong fi- nancial advantage over larger vessels of a similar capability said Giddens, speak- ing at the signing of the build contract with Drydocks World in Singapore. “There are very few new build vessels being ordered for our industry and cer- tainly none as exciting or as ground- breaking as the CSS Derwent. She will have the capacity of a 120m vessel, but not the cost either initially or opera- tionally.”

The CSS Derwent will join the Hallin fleet during the second quarter of 2012.

The project has been backed by Hallin’s parent company, Superior Energy Serv- ices, Inc, further supporting the combined strategy to grow this business sector.

The CSS Derwent is MODU compliant and, when interfaced with the Superior- owned 3,000m Lubricator systems, pro- vides a one-stop shop for subsea light well intervention, inspection repair and maintenance, plus subsea construction support. The CSS Derwent was designed by STX Canada Marine Inc and has un- dergone extensive testing and develop- ment. The CSS Derwent will be the third vessel that Drydocks World has built for

Hallin, and will join the SOV Ullswater and the SOV Windermere.

CSS Derwent Particulars & Features • Owner: Hallin Marine • Builder: Drydocks World • Designer: STX Canada Marine Inc. • Classification: ABS Class +A1 Mo- bile Offshore Drilling Unit +AMS (E) DP3 UWILD Helideck • Built in ROV hangers amidships and starboard house 2 off 250hp con- struction class ROVs, both opera- tional to depths of 3,000 m. • 150T SWL active heave compen- sated knuckleboom subsea crane which will work in 3,000m depths • Speed 10+ knots • Deadweight 3200T @ 8.2m • Main generator engine 6 x 2800KW @ 900rpm • Thrusters 4 x 3000KW; 450KN thrust • Multi Purpose Tower with 200T

SWL AHC, and 3000m hook travel • Combination of tower and crane gives a versatile twin deployment ca- pability with vessel ballasted down to 14m deep water capability - en- hanced stability • Deck space comparable to 120m plus vessels • Large cargo deck area - in excess of 1300 sq. m. at 10T/sq. m. • Working deck designed to give a sin- gle length run of 50m and width of 32m within easy access of the subsea crane

CSS The Compact Semi Submersible

Hallin Orders Unique $110m, DP3 Vessel “The CSS Derwent will support the oil operators’ desire to improve production and reduce costs. Here at Hallin we believe that the CSS is the future.”

John Giddens, CEO, Hallin

John Giddens (left), CEO of Hallin Ma- rine, and Denis Welch, CEO of Dry- docks World - Southeast Asia, sign the contract for the $110m, DP3 CSS.