Final presentation RMR

1FOR INTERNAL USE ONLY

Accidents hurt – safety doesn’t.

“Defensive Driving”

FOR INTERNAL USE ONLY

RISERLESS MUD RECOVERY SYSTEM

By Asif & Aziz


Preview

▌ What is RMR?▌ Advantages▌ Components▌ Dual Gradient Drilling▌ Case Study▌ RMR Track Record▌ Limitations▌ Pioneers▌ Conclusions


RMR® - Riserless Mud Recovery

Safer, faster, cleaner top-hole drilling.

• Drill stable top hole section

• Less impact on environment.

•No “Pump & Dump”.


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?


Dual Gradient Drilling

• Optimized drilling

• Better well control

•Fewer Casing Point.

• Larger mud weight window


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)


1. Suction Module (SMO)

▌ Collecting mud returns▌ Provides connection to SPM▌ Lighting & Video Camera▌ Mud level control system▌ Deployed through rigs moon

pool


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


3. Umbilical & winch (UW)

▌ Power supply ▌ Control connection between CC &

SPM

http://www.drillingcontractor.org/wp-content/uploads/2010/04/Riserless-fig16.jpg


4. Power and Control Container (CC)

▌ Crew work area▌ Monitor & Control SPM & SM ▌ Monitor mud level▌ Supply data to rig system


5. Mud Return Line (MRL)

▌ Return mud to rig▌ 6’’ diameter ▌ Connected to pump via ROV

http://www.drillingcontractor.org/wp-content/uploads/2010/04/Riserless-fig07.jpg



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.


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.


RMR TRACK RECORD


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


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


Enhancement in DFG


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


CONCLUSION

• Evolving Technology.

• More field trails.


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/

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• http://www.drillingcontractor.org/new-deepwater-riserless-mud-recovery-system-opens-door-to-deepwater-dual-gradient-

drilling- 5313
