LONESTAR

Lone Star is a 6th generation semi-submersible drilling rig constructed in GPC Yard, in Abu Dhabi. The rig follows the TDS2000 PLUS design, and is equipped with high-tech devices that ensures a maximum uptime and safer operations while minimizing emissions, discharge and human interface. Lone Star is a DP2 class rig which can drill wells up to 24,600 ft in water depth up to 7,880 ft.

TECHNICAL SPECIFICATIONS

GENERALName: Lone StarFlag: PanamaYear Built: 2008 (Keel Laying)Builder: GPC Yard, Abu DhabiDesign: Gusto TDS-2000 PLUSClassification: ABS - Maltese Cross, A1, PAS, AMS, Column Stabilized Drilling Unit, DP2

MAIN DIMENSIONSLength: 97.54 m (Pontoon Overall)Breadth: 70.10 mDepth: 2.43 m (Main Deck)Columns: 4 x (11 x 15 m) (Square)Pontoons: 97.54 x 15 x 7.62 m (Length x Breadth x Height)Deck Area: 102.8 x 64.6 m (Main Deck)

DESIGN OPERATING CONDITIONSMaximum Water Depth: 7,880 ft.Drilling Depth Capacity: 24,600 ft.Operating Draft: 18.30 m (60 ft.)Transit Draft: 7.50 m (24.5 ft.)Survival Draft: 13.72 m (45 ft.)Operational Displacement: 32,000 tonTransit Displacement: 23,000 ton

ELECTRIC SYSTEM AND DIESEL MOTORSMain Power: Eight EMD, Model ME20-710-G7C-T2, 4.0 MW, 900 rpmMain Generators: Eight Baylor AC Generator, Model G8552XT-649, 3.8 MW, 900 rpm, 11KV Power Distribution: NOVEmergency Power: One Caterpillar, Model 3516B - SR4B, 1.8 MW, 1,800 rpm, 480V

PROPULSION/THRUSTERS Thrusters: Eight Wartsila Lips Azimuth Thrusters, Model FS2500-463NU2.6 MW, driven by electric motor, variable speed / VFD controlled, 2 @ each pontoon endDynamic Positioning System: Kongsberg Maritime /SDP32, HIPAP450, DPS700

MAXIMUM OPERATING / ENVIRONMENTAL CONDITIONSNormal drillingDraft / Displacement: 18,30 m / 31,758 tonVariable Deck Load: 6,470 ton (drilling), 4,689 ton (transit)Wave Height (maximum): 10,7 mPeak Period: 13,70 sWind Speed (maximum): 19,63 m /sec Current Speed (maximum): 1,61 m /sec

DRILLING EQUIPMENTDerrick: NOV Bolted Beam-Leg Dynamic DerrickStatic Hook Load: 2,000 Kips; Base: 185 ft. x 40 ft. x 43 ft.; V Door Level: 72 ft.Drawworks: NOV, SSGD-1000-6000-48-82-9, 6000 HP driven by four AC motors (VFD), Baylor, CM632UUTRotary Table: NOV, RST, 60 1/2”Top Drive: NOV, TDS 1,000 A, 2,000 KipsTraveling Block: NOV, 7 x 72” sheaves, 2,000 KipsMotion Compensator: NOV Active Heave Compensator, 800 KipsCementing: Schlumberger CP665, 15,000 psiMud System:- 4 x Mud Pumps NOV, 14P220 triplex, 2,200 HP, driven by two AC motors Baylor @ each pump- 4 x Brandt Cascade Shakers, LCM3D/CM2- 1 x Brandt Shaker with Mud Cleaner / Desilter / Desander, LCM3D

RIG STORAGE CAPACITIESUpper Deck: 2.5 ton /m²Riser Rack (horizontal): 105 joints / 75 ft.Miscellaneous Storage Area: 2.44 ton /m²Bulk Bentonite / Barite: 3 / 3 x 2,200 ft. 3 eachBulk Cement: 3 x 2,200 ft. 3 eachSack Storage Area: 2,000 sacksLiquids: Drilling Mud: Active Tanks (8 ea.): 4,000 bbl; Reserve Tanks (2 ea.): 2,200 bblSlug Tanks (1 ea.): 70 bbl; Sand Trap and Processing Tanks (6 ea.): 720 bbl; Trip Tank (1 ea.): 108 bblBrine Storage (2 ea.): 2,200 bblSynthetic Mud Storage (2 ea.): 2,200 bblDrill Water: 2,000 m³ Fuel Oil: 2,276 m³ Potable Water: 226 m³

SUBSEA SYSTEMSBlowout Preventers (Trimmed for H2S Services): Hydril 18 3/4“x 15,000 psi WP, One Single + Two Double ram units.Two Hydril GX Annular 18 3/4“x 10,000 psi WP, both on LMRPBOP Handling: Patriot BOP transporter rated for 400 tonControl System: Hydril multiplex, blue/yellow cable reel, hot line hose reelHole Position Indicator: KongsbergRiser Angle Indicator: KongsbergDiverter: One Hydril FS21, 60 “x 500 psi working pressure.Drill Pipe: 7500 m x 5 ½” TSDS-50Drill Collars: 6 x 9 ½” DC, 27 x 8” DC, 36 x 6 3/4” DC and 30 x 5“ HWDP

CHOKE & KILL MANIFOLD(Trimmed for H2S Services):WOM 15,000 psi manifold, 3 1/16” manual valves, trimmed for H2S serviceTwo manual chokes and two hydraulic chokes

MARINE RISER SYSTEMAker Kvaerner Clip Riser - 21” OD x 75 ft. long, with clip connectorsRiser Tensioning System: Ten NOV 250 Kips, 12.5 ft strokeRiser Running Tools: Aker Kvaerner Clip RiserTest Tool - Aker Clip Riser test tool.Flex Joints: Oil States 18 3/4”x 5,000 psi WP

MOORING SYSTEMWinches: Two Oil States Skagit, electrical, 450,000 lb stalling pull, wire capacity (3”x 400 m) minimum break load 389 MT each one. Anchors: Two of 8 ton designed such as Stevpris type

CRANESTwo Kingpost Deck Cranes, Patriot, series 240, Model 200D, 64 ton One BOP Auxiliary Maintenance Crane, Oil State Skagit, Model 200B-50, 25 ton

DRILL FLOOR22 m (Length) x 16 m (Width), wind walls, variable finger racking board, fall protection, tugger and block hang-off points.Drill Floor Manipulator Arm NOV DFMA-U-5000NOV Catwalk Machine PR40-75HSPiping Racking System NOV-PRS8iNOV Foxhole

MOON POOL40 m x 6,28 m x 8 m

SPECIAL FEATURESPatriot Riser Gantry Crane 2 x 35 ton ratedData Acquisition System NOV Amphion/SDI SystemHelideck for Sikorsky S-92Two water maker, 50 ton capacity eachAccommodations for 140 people are provided with galley, recreation, offices, sick bay, dedicated workshops for mechanical, electrical and subsea areas.