Transcript
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Accidents hurt – safety doesn’t.
“Defensive Driving”
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RISERLESS MUD RECOVERY SYSTEM
By Asif & Aziz
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Preview
▌ What is RMR?▌ Advantages▌ Components▌ Dual Gradient Drilling▌ Case Study▌ RMR Track Record▌ Limitations▌ Pioneers▌ Conclusions
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RMR® - Riserless Mud Recovery
Safer, faster, cleaner top-hole drilling.
• Drill stable top hole section
• Less impact on environment.
•No “Pump & Dump”.
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Less Casing
Well Control
Engineered Fluid
Loss & Gain
IndicatorsReal time Monitoring
Mud Volume Control
Cement Job
Shallow Hazard
What RMR can do for you?
Zero Discharge
What are we concerned with?
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Dual Gradient Drilling
• Optimized drilling
• Better well control
•Fewer Casing Point.
• Larger mud weight window
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Components
1. Suction Module (SMO)
2. Subsea Pump Module (SPM)
3. Umbilical & Umbilical winch (UW)
4. Office & Tool Container (OTC)
5. Power and Control Container (CC)
6. Mud Return Line (MRL)
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1. Suction Module (SMO)
▌ Collecting mud returns▌ Provides connection to SPM▌ Lighting & Video Camera▌ Mud level control system▌ Deployed through rigs moon
pool
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2. Subsea Pump Module (SPM)
▌ Support frame for pump & motor
▌ Connected to SM by flexible hose
▌ Three electrically disc driven pumps
▌ Pump cutting upto 20” inches diameter
▌ Minimal damage to cuttings
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3. Umbilical & winch (UW)
▌ Power supply ▌ Control connection between CC &
SPM
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4. Power and Control Container (CC)
▌ Crew work area▌ Monitor & Control SPM & SM ▌ Monitor mud level▌ Supply data to rig system
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5. Mud Return Line (MRL)
▌ Return mud to rig▌ 6’’ diameter ▌ Connected to pump via ROV
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Limitations
▌ The max water-depth is 4,593ft (1400m).
▌ Pumping mud weight up to 14.35PPG (1.72sg )
This is still a developing and evolving with time as deepwater drilling technology.
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Case Study – West Azeri FieldDrilled a well in 2003 by BP with semi-sub with a water depth of 120 mtrs ft.Drilled 36” OH till 423 mtrs, 30” CSG @ 413 mtrsDrilled 24” OH 801 mtrs, 18 5/8” CSG @ 794 mtrs.Cement job was good. Used less volume of cement as compared to standard volume calculation which was 200% excess.
Case Study – Shakhalin Shelf (Russia)Due to ecological restriction. RMR system was used to provide a close loop system and it worked very well.
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RMR TRACK RECORD
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1 well2034 ft
7 wells279-354 ft
1 well4657 ft
24 wells154-1004 ft
7 wells249-1148 ft
33 well387-1723 ft
35 wells85-430 ft
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How is our role as mud engineers changes?
For riserless we had to think more about volume of PAD mud and logistic issues.
But with RMR – Engineered FluidWaste Management system
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Enhancement in DFG
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Pioneers In This Industry
▌ The shallow water version of RMR has been used commercially since 2003 on more than 100 wells worldwide.
AGR Subsea BP Shell PETRONAS Chevron Statoil Demo 2000
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CONCLUSION
• Evolving Technology.
• More field trails.
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References• Hector Moreno – SME (Lead Technical Instructor)• OTC 17665• SPE IADC 105212• www.enhanced-drilling.com
SPE 166839• “Feasibility Study of a Dual Gradient Mud System for
Deepwater Drilling Operations”, 1997 OTC #8465.• http://www.odplegacy.org/PDF/Admin/Long_Range/• CONCORD.pdf.http://www.enhanced-drilling.com/solutions/
rmr- riserless-mud recovery?gclid=CjwKEAjwxKSoBRCZ5oyy87DimEcSJADiWsvgq5yiTEp9Er_Vym7h5Wzmn9IwEm04DdtvcqtaeJSZlRoCK1fw_w cB
• http://www.drillingcontractor.org/new-deepwater-riserless-mud-recovery-system-opens-door-to-deepwater-dual-gradient-
drilling- 5313
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