WEST VENTURE was built by Hitachi Zosen Ariake Works and delivered to Smedvig Offshore AS a Bergen, Norway on February 2000, and the drilling / workover operation was started a Troll C oil field off Bergen. The rig has a fully redundant DPS (Dynamic Positioning System), a large variable deck load and a high efficiency dual RamRig system, and meets the requirements for deep water drilling. The rig is a 5th genera ion semi submersible rig and is currently he most advanced rig in he world.
The most unique feature of he rig is he dual RamRig, Hydraulic, system that is superior to any other conventional drilling system and the first system of its kind to opera e anywhere in the world.
(1) Norwegian Rules (NPD, NMD)
The Norwegian rules (NPD and NMD) which are well known as the most stringent offshore rules in he world, are fully applied for safety, reliability and maintenability of the rig.
(2) Variable Deck Load
The rig bear large VDL (5,500 MT) for very deep water operation.
(3) Full DPS and Operating Water Depth (NMD DP Class 3, DYNPOS AUTRO)
The rig is operated under fully automated dynamic positioning mode by means of eight (8) azimuth thrusters in very deep water.
(4) Automated Drilling Equipment
Most part of drilling equipment, RamRig, Mud system and BOP control, is well-automated in order to produce high efficiency, reduced personnel and safe environment for drilling opera ion.
(5) Installation / Maintenance for sub-sea Equipment
The rig also carry out installation / maintenance of subsea equipment as well.
PRINCIPAL PARTICULARS
Length (o.a.) ... 117.6 m
Length (b.p.) ... 117.6 m
Breadth (mld.) ... 69.7 m (at main deck)
Depth (mld.) ... 44.45 m (Depth up to top of upper deck)
Draft (mld.) ...
23.5 m (operating condition)
21.5 m (survival condition)
9.85 m (transit condition)
Gross tonnage ... abt. 23,000 MT
Variable Deck Load ... 5,500 MT
Speed (max. trial) ... 8.8 knots
Complement ... 114
Classification ... DnV +1A1 "Column Stabilized Drilling Unit"
Max.operating water depth ... 1,500 m
Max.drilling depth ... 9,000 m
Main generator ... 4,000 kW x 8 sets
Thruster ... Azimuth type, 3,200 kW x 8 sets
Drilling equipment
Dual RamRig ... 2 x 590 ton x 6 m working height
Rotary t able ... 60-1 / 2", 590 ton
Top drive ... 590 ton
