Tài liệu Coiled Tubing Introduction docx

Coiled Tubing Introduction • Surface equipment • BHA assemblies • Some problems and observations 3/14/2009 1 George E. King Engineering GEKEngineering.com Coiled Tubing Introduction • Surface equipment • BHA assemblies • Some problems and observations 3/14/2009 2 George E. King Engineering GEKEngineering.com 3/14/2009 3 George E. King Engineering GEKEngineering.com World Wide CT Records Largest CT in Use 3-1/2" Max Depth 24,000' Max Horizontal 17,000' (80 deg)-Wytch BP Longest BHA 1500' - perf guns - UK Longest Strings 23,000' of 2-3/8" 28,000' of 1-1/2 Max Wellhead Pressure 9800 psi Max Deployment Press 4500 psi Max BH Temp 700F - Mex, 780F Japan Max Acid at Temp 28% at 280F in Dubai CT in H2S 75% in Greece 98%/300F- Gulf of Mexico (string used one time) CT in CO2 15% - (string ruined) 3/14/2009 4 George E. King Engineering GEKEngineering.com Power Pack Injector Reel Operator’s Cab Transports and Pumpers wind Typical CT Layout 3/14/2009 5 George E. King Engineering GEKEngineering.com CT Reel Configurations •CT Reels available in number of configurations –Truck mounted (fixed) - permanently fixed to the truck chassis –Truck mounted (skid) - may be changed out –Skid mounted - for offshore operations –Trailer mounted - for large capacity (length) or heavy weight strings –CT logging reel - fitted with electrical swivel/collector –Special application reel - typically for completion applications •Local conditions/nature of CT operations determine type of reel required 3/14/2009 6 George E. King Engineering GEKEngineering.com 3/14/2009 7 George E. King Engineering GEKEngineering.com 3/14/2009 8 George E. King Engineering GEKEngineering.com Coiled Tubing Rig up in Alaska. Two wells on the same pad are being. 3/14/2009 9 George E. King Engineering GEKEngineering.com 3/14/2009 10 George E. King Engineering GEKEngineering.com [...]... lasts longer and is more fatigue resistant But, what about corrosion? Hardness matters Stress Corrosion cracking and embrittlement 3/14/2009 George E King Engineering GEKEngineering.com 20 Analysis of Coiled Tubing Carbon Manganese Phosphorus Sulfur Silicon Chromium Nickel Copper Molobidum Cb-V 3/14/2009 Mod A606 0.08-0.15 0.60-0.90 0.030 max 0.005 max 0.30-0.50 0.45-0.70 0.25 max 0.40 max 0.21 max George... ball travel may take several minutes to clear the coil and enter the well 3/14/2009 George E King Engineering GEKEngineering.com 35 A flow control manifold This one allow reverse circulation through coiled tubing 3/14/2009 George E King Engineering GEKEngineering.com 36 ... Pressure Gauge • displays wellhead pressure at the BOP pressure port – Circulating Pressure Gauge • displays pressure at the reel-manifold pressure sensor – Weight Indicator • displays weight exerted by the tubing on the injector head 3/14/2009 George E King Engineering GEKEngineering.com 29 3/14/2009 George E King Engineering GEKEngineering.com 30 Running Speeds • First time into a well - 40 to 70 ft/min... GEKEngineering.com 17 Field Welds • Always a Butt weld • Can decrease tensile strength of CT by 50% or more • Quality of field welds varies enormously • Avoid field welds when you can – Upper part of tubing is worst place for a butt weld 3/14/2009 George E King Engineering GEKEngineering.com 18 Material Strengths • 55,000 psi (limited) • 70,000 to 80,000 psi (still in use) • 100,000+ psi (now very . Coiled Tubing Introduction • Surface equipment • BHA assemblies • Some problems and. observations 3/14/2009 1 George E. King Engineering GEKEngineering.com Coiled Tubing Introduction • Surface equipment • BHA assemblies • Some problems and