The Stena Don is a harsh environment dynamically positioned Class 3 semi submersible drilling, completion and workover vessel for worldwide operations. The Stena Don has a capability for a water depth up to 1640ft using a 18 ¾” – 15,000psi WP ‘TL’ Cameron BOP and Cameron 21” LK 2.0 riser.

General Information

Rig TypeSemi Submersible
DesignTwin Pontoon, 6 Columns CS30
Construction YardKvaerner Warnow Werft Shipyard, Germany
Year Delivered2001 Upgraded VDL 2010
ClassificationDNV: +1A1, Column Stabilized Drilling unit, DRILL (N), Structure (N), E0, DYNPOS AUTRO, CRANE, HELDK
FlagMarshall Islands
Station KeepingKongsberg Simrad SDP 21
Max Water Depth500 m
Max Drilling Depth8473 m
HelideckCapacity Sikorsky S-92 / Super Puma
Shale Shakers5 x Axiom AX-1
Accommodation120 persons

Dimensions/ Loading

Breadth67 m
Moonpool7 x 21.5 m
Operating Draft21.5 m
Transit Draft12 m
VDL (Operating)5,100 mt

Drilling Equipment

Mast/DerrickHydralift 750/36
Hoist/DrawworksHydralift Hydraulic Lift System 680Mt
Motion CompensatorHydralift 680Mt locked
317Mt open
Top DriveHydralift HPS 750 2E AC (TD)
Pipe HandlingHydralift – Hydra Racker III
Offline Stand BuildN/A
Mud Pumps3 x Continental Emsco FC-2200
Shale Shakers5 x Axiom AX-1

Well Control Equipment

BOPCameron 18.” 15,000 psi WP ‘TL’
LMRP1 x CIW DL Annular 10K 18 ¾ “
Wellhead Connector Vetco H4 ExF
Control SystemCameron MUX system
Riser Cameron 21” LK 2.0 / RF
Riser Tensioners8 x 160 kips Stroke -15.24m Hydralift
Choke & Kill ManifoldCameron 3 1/16” API - 15.000 psi
DiverterGE Vetco – KFDS – CSO – 60 ½”


Liquid MudActive - 630m³
Reserve – 396m³
Drill Water903.5 m³
Potable Water 520 m³
Fuel Oil2800 m³
Bulk Cmt236.5 m³
Base Mud236.5 m³
Brine640 m³
Sack Material2000 Sacks

Machinery/ Hoisting/ Station Keeping Equipment

Main Power9 x Wartsila 16V25
Generator Rated Output: 4375kVA
Emergency PowerIntegrated in main power
DP SystemKongsberg Simrad SDP 21
Thrusters6 x Rolls Royce UUC5001
Mooring systemN/A on DP rig
Deck CranesHydralift Knuckle Boom OKMCVC 4000
Riser CraneN/A
BOP Handling320Mt Hydralift BOP trolley.
320Mt BOP Overhead Crane.