Upgraded Discoverer 534 Sailing for Challenging Assignments

The Transocean deepwater drillship Discoverer 534 has concluded a major life-enhancement and upgrade project to enable the rig to conduct more challenging operations, including its next two campaigns in Pakistan and India.

After 3.1 million man-hours and a 0.52 TRIR (Total Recordable Incident Rate) during the shipyard project and sea trials, the Discoverer 534 has safely set sail from Singapore.

The upgrade at Singaporeís Sembawang Shipyard (SSPL) included hull tank steel replacement, painting of all tanks and decks, a 15-year hull-life extension, a new aluminum helideck forward and navigation mast, a new Kongsberg DP (dynamic positioning) system, a dynamic positioning upgrade from DP 1 to DP 2 classification, an extensive overhaul of all six thrusters, and new vessel and power management systems.

Drilling enhancements included a new drillerís instrumentation system, iron roughneck, casing-stabbing basket, subsea tree-handling system and dedicated well-test area. Liquid mud storage capacity was significantly increased to accommodate the multiple mud types and volumes required for modern deepwater drilling. Refurbishments were made to the mud pits, BOP (blowout preventer), LMRP (lower marine riser package), main engines and top drive.

Also added were a high-capacity Seatrax Deck Crane, brand new rig living quarters and a central warehouse.

Destined for offshore Pakistan for a one-well contract, the Discoverer 534 will be drilling only the thirteenth offshore exploration well ever constructed in the history of Pakistan. It will also be drilling Pakistanís second-deepest water depth well at 4,285 feet (1,306 meters).

The current Pakistan water depth record is held by the Transocean ultra-deepwater drillship Deepwater Discovery at 8,901 feet (2,712.90 meters).

Following the well in Pakistan, the Discoverer 534 will return to India and commence a firm 30-month plus six-month option contract. The Discoverer 534 will be used for exploration drilling and field development using subsea completions, and several of the key upgrades (in particular, the subsea tree handling system, high capacity deck crane and dedicated well test area) were executed in preparation for this contract.

Constructed in 1975 and upgraded in 1991 and 2007, the Discoverer 534 is one of 16 Other Deepwater rigs in the Transocean fleet of 82 mobile offshore drilling units. It has nominal ratings for up to 7,000 feet for water depth and up to 25,000 feet for drilling depth.

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