Developing a Slim-bore Wellhead & DT- HXT system for deep-water installation savings. K.Buckle UTC Bergen 5 th Jun 08 Session I (09:00-09:30)

Transcription

1 Developing a Slim-bore Wellhead & DT- HXT system for deep-water installation savings. K.Buckle UTC Bergen 5 th Jun 08 Session I (09:00-09:30)

2 System Incentives Rig Rates: Circa $450K/day Deeper Water: Up-to 10,000 ft Reduction of Installation Time Function of WD + Tripping Saving ~ 2 Off Days Circa $900K 2

3 System Objectives Maintain: Robustness of Existing System Familiarisation of Equipment, Methods & Procedures Multi Disciplinary Reviews: Drill Well On Paper Regular Client Reviews and Design Input Utilise What Works, Fix What Doesn t Draw on Clients Experience & Knowledge Qualification: Stringent PR-2 Temp/Pressure Cycles + Additional Testing Actual System Components Utilised Full Scale Integration Design (IDT) Interface New and Existing Equipment 3

4 System Installation/Architecture Traditional Csg Program (Conductor + 3 Off Csg) Slim Csg Program (Conductor + 2 Off Csg) 1. Open Water Drlg (36 /30, 20 x 18-3/4 Hsg) 1. Open Water Drlg (36 /30, 20 x 18-3/4 Hsg) 2. Install 18-3/4 BOP On Well Head 2. Install 18-3/4 BOP On HXT (Tree Off Crit. Path Activity) 3. Drill 17-1/2 for 13-3/8 Csg 4. Drill 12-1/4 for 9-5/8 36/30" 20" 36/30" 20" 3. Drill 12-1/4 for 9-5/8 (Thro Tree) 4. Complete Well 5. Pull BOP 6. Install Tree 13-3/8" 7. Reinstall BOP & Complete 9-5/8" #" #" 9-5/8" 4

5 MS-700 SB W-Head & HT2 DT-HXT Sys Specifications & Features: 10,000 Psi System 1,000,000 lbs of Casing 12-1/4 Drift in WH 9.7 Min. ID for SCSSV Install 10-3/4 Csg Thro Tree HT2 DT-HXT & Tubing Hanger System Up to 1/2- Mlbf Prod Tbng + 10,000-Psi Above 13-1/2 Drift in Tree HP-Hsg, Casing Hanger & Annulus Seal 5

6 System Comparisons (HP-Hsg) 18-3/4 MS700 Common Installation Tooling Same Pressure Rtg > 10,000 Psi Common L.P-Housing Flow-by areas: Standard 16 sq. in. Slimbore 14 sq. in. Pass Thru Drift: Standard /2 in. Slimbore /4 in. 18-3/4 Slim Bore MS700 6

7 Slim Bore (HP-Hsg x 10-3/4 Csg Hngr) New 13-1/2 MS-1 & Contingency Seal HP-Hsg Flow-by: 14 sq. in Pass Thru Drift: 9.70 Min For SCSSV New 13-5/8 Tooling Suite: Plug Tool: C/W Lead Impression Feature PADPRT: Csg Latch & 5-Kpsi BOP P Set Seal SRT: Different Hyd Intensifier Ratio Mill & Flush: Same Design 7

8 DT W-Head Challenges MS-1 Seal PR-2 & Damage Tolerant Dual WB Retrieval (Tree & Csg Hngr) Tooling Req, Test & Interfacing 8

9 System Comparisons (HXT) 18-3/4 Non DT-HXT Common Features Installation & Test Tooling Pressure Rtg > 10,000 Psi MVB Internal Geom. (Above Load Shldr) Tree Connector & Interfaces Lockdown, Sealing & Annulus Flowby 18-3/4 DT-HXT Unique DT-HXT Features Nom 13-1/2 Drift WB & Isol Slv (Std Tree 9-1/4 Bore Isol Slv) High Strength Load Shoulder Wellhead to Isol Slv Seal 9

10 DT-HXT Challenges Impact of 12-1/4 D-BIT Pass Thro Maintaining MVB Load Shoulder Capacity Orientation System & Capacity Isolation Sleeve Connection & Sealing Wear Bushing Geometry & Pressure Rating Interface With Standard & SB MS700 Systems 10

11 Achieving Assurance Up Front Feasibility Report Drill Well On Paper Workshop FMECA, Design Reviews, Qualification Testing Full Scale Test & Interface of HXT Components Full Scale Test & Interface of W-head and Tools PVT of Tree & Wellhead Seals Full Scale Integration Design Testing of Test Tree & Wellhead Sys. Capture Lessons Learnt & Enhancements 11

12 Acknowledgements: B.Voss (Vetcogray) M.Minassian (Vetcogray) D.Benson (Vetcogray) M.Starkey (Exxon Mobil) 12

13 Thank you for attending! Questions? 13