Page 92: of Offshore Engineer Magazine (Apr/May 2014)

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Houston-bsed inde- pendent Anadarko

Petroleum in the US

GOM this year.

The original order was

Vessels for three drillships, with, during 2012, Diamond

Offshore increasing the order to four ships. The third and fourth vessels, the Ocean BlackRhino and the Ocean BlackLion, are due for delivery later this year.

Design specifcations include dynamic-posi- tioning, dual activity capability, and a maxi- mum hook-load capacity of 1250 tons. The unit will also feature two seven-ram BOP stacks, with the second avail- able for use as a spare.

The owner elected to

The drillship alongside at Batamec. Norshore Atlantic Photo: Alan Thorpe equip its frst three drill- operations will have to be assisted by position in severe weather conditions ships with an additional seven-ram BOP ice-breakers. Although designed as an with waves of up to 36.1ft (11m) and to improve rig reliability. The cost to add

Arctic drillship, the vessel can operate wind speeds of up to 85.3ft (26m)/sec. a second BOP is approximately $34mil- for nine months/year in very rough, but Yearend 2013, Houston’s Atwood lion, bringing the average total price for open, water conditions. The main dimen- Oceanics took delivery of the Atwood each of the drillships to approximately sions are 760ft (231.8m) in length, 147ft Advantage from DSME.  The dynamic $640million. (44.8m) breadth and 55.1ft (16.8m) depth. positioned Atwood Advantage has now During September 2013, the UK’s

The design features a disconnectable commenced its drilling services contract Ensco took delivery of ENSCO DS-7, an turret, a turret mooring depth of up to with Noble Energy under a three-year advanced-capability, ultra-deepwater 1640ft (500m), a DP3 system, a composite contract in the US GOM. It can operate in drillship from SHI, the vessel now shelter, and a HVAC using a heat recovery water depths up to 12,000ft (3657m) and involved in a three-year charter with system. All equipment on-board this vessel drilling depths up to 40,000ft (12,192m). France’s Total off Angola. The ENSCO is arranged under sheltered conditions, the

The second vessel in this series, the DS-7 is the third Ensco rig contracted safety and supply equipment, including a

Atwood Achiever is due for delivery by Total and will be the fourth Ensco rig double helideck and two hovercrafts, with

June 2014, with no charter yet disclosed. working in West Africa. sheltered embarkation areas.

The third vessel, the Atwood Admiral, is The ENSCO DS-7 is the ffth of eight due for delivery in 2015, and will enter rigs in the company’s ultra-deepwater a three-year contract with Dallas-based DP3 drillship series, which are equipped

New deliveries

One of the latest deliveries in the drill- Kosmos Energy. The fourth vessel, the with advanced technological features ship market occurred in February when Atwood Archer, also due for delivery in for drilling and completing deepwater

Denmark’s Maersk Drilling took deliv- 2015, and is so far unchartered. wells including DPS-3 certifed dynamic ery of its frst ultra-deepwater drillship, During 2013, Houston’s Diamond positioning, six-ram 15,000psi BOPs,

Maersk Viking, from SHI. It has started a Offshore Drilling took delivery of the enhanced offine capability, 2.5mil- three-year charter with ExxonMobil in the frst two of four Gusto P10,000 drill- lion pound hook load on main rotary,

US GOM. The Maersk Viking is the frst in ships from HHI. The original contract, 6000-barrel active and 7400-barrel a series of four ultra-deepwater drillships placed in 2011, was for three sister ships reserve dual-fuid systems, 165-tonne to enter Maersk Drilling’s feet. The four capable of working in water depths active heave subsea crane, signifcant drillships represent a total investment of up to 12,000ft (3657m), although the storage and deck space, and accommoda-

US$2.6billion. frst two vessels are outftted for work tion for up to 200 persons. The ENSCO

Featuring dual derrick and large subsea in depths up to 10,000ft (3048m). The DS-8 and the ENSCO DS-9 will be deliv- work and storage areas, the drillship drilling depth is 40,000ft (12,192m). The ered later this year.

design allows for effcient well construc- Ocean BlackHawk, delivered during the This year will see the delivery of the tion and feld development activities 2Q 2013, and the Ocean BlackHornet ultra-deepwater drillships Pacifc Sharav through offine activities. With their arrived during December 2013, ahead and Pacifc Mettem for Pacifc Drilling advanced positioning control system, of its planned delivery. Both vessels from SHI, part of a series of eight such the ships automatically maintain a fxed have started drilling operations for ships. When delivered, the Pacifc

April 2014 | OE oedigital.com 94 000_OE0414_Vessels2_Thorpe.indd 94 3/22/14 7:12 PM