Final presentation RMR
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This document discusses riserless mud recovery (RMR) systems, which allow for top-hole drilling and return of drilling mud without using a riser. RMR systems have components like a suction module, subsea pump module, and umbilical to control pumps subsea. They allow for safer and faster top-hole drilling with less environmental impact by containing mud returns. Case studies show RMR systems have been used successfully on over 100 wells between 2003-present.
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Final presentation RMR
- 1. 1FOR INTERNAL USE ONLY Accidents hurt – safety doesn’t. “Defensive Driving”
- 2. FOR INTERNAL USE ONLY RISERLESS MUD RECOVERY SYSTEM By Asif & Aziz
- 3. 3FOR INTERNAL USE ONLY Preview ▌ What is RMR? ▌ Advantages ▌ Components ▌ Dual Gradient Drilling ▌ Case Study ▌ RMR Track Record ▌ Limitations ▌ Pioneers ▌ Conclusions
- 4. 4FOR INTERNAL USE ONLY RMR® - Riserless Mud Recovery Safer, faster, cleaner top-hole drilling. • Drill stable top hole section • Less impact on environment. •No “Pump & Dump”.
- 5. 5FOR INTERNAL USE ONLY Less Casing Well Control Engineere d Fluid Loss & Gain Indicators Real time Monitoring Mud Volume Control Cement Job Shallow Hazard What RMR can do for you? Zero Discharge What are we concerned with?
- 6. 6FOR INTERNAL USE ONLY Dual Gradient Drilling • Optimized drilling • Better well control •Fewer Casing Point. • Larger mud weight window
- 7. 7FOR INTERNAL USE ONLY 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)
- 8. 8FOR INTERNAL USE ONLY 1. Suction Module (SMO) ▌ Collecting mud returns ▌ Provides connection to SPM ▌ Lighting & Video Camera ▌ Mud level control system ▌ Deployed through rigs moon pool
- 9. 9FOR INTERNAL USE ONLY 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
- 10. 10FOR INTERNAL USE ONLY 3. Umbilical & winch (UW) ▌ Power supply ▌ Control connection between CC & SPM
- 11. 11FOR INTERNAL USE ONLY 4. Power and Control Container (CC) ▌ Crew work area ▌ Monitor & Control SPM & SM ▌ Monitor mud level ▌ Supply data to rig system
- 12. 12FOR INTERNAL USE ONLY 5. Mud Return Line (MRL) ▌ Return mud to rig ▌ 6’’ diameter ▌ Connected to pump via ROV
- 13. 13FOR INTERNAL USE ONLY
- 14. 14FOR INTERNAL USE ONLY 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.
- 15. 15FOR INTERNAL USE ONLY Case Study – West Azeri Field Drilled 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 mtrs Drilled 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.
- 16. 16FOR INTERNAL USE ONLY RMR TRACK RECORD
- 17. 17FOR INTERNAL USE ONLY 1 well 2034 ft 7 wells 279-354 ft 1 well 4657 ft 24 wells 154-1004 ft 7 wells 249-1148 ft 33 well 387-1723 ft 35 wells 85-430 ft
- 18. 18FOR INTERNAL USE ONLY 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 Fluid Waste Management system
- 19. 19FOR INTERNAL USE ONLY Enhancement in DFG
- 20. 20FOR INTERNAL USE ONLY 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
- 21. 21FOR INTERNAL USE ONLY CONCLUSION • Evolving Technology. • More field trails.
- 22. 22FOR INTERNAL USE ONLY 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=CjwKEAjwxKSoBRCZ5oyy87DimEcSJADiWsvg q5yiTEp9Er_Vym7h5Wzmn9IwEm04DdtvcqtaeJSZlRoCK1fw_w cB • http://www.drillingcontractor.org/new-deepwater-riserless-mud- recovery-system-opens-door-to-deepwater-dual-gradient-drilling- 5313
- 23. 23FOR INTERNAL USE ONLY
Editor's Notes
- Safety is without doubt the most crucial investment we can make. And the question is not what it costs us but what it saves.
- One of the primary goals of our customers is maximize the production rate of the reservoirs. However there are several factors that will have an impact on this rates: formation damage, high oil viscosity, low reservoir pressures or low permeability. Of these factors, the one we have manage to control while drilling is the Formation Damage, by designing and using non damaging reservoir Drill-in systems, that contain formation friendly polymers and bridging agents that control suspension and filtration rates. Of the four aforementioned factors that affect the production rate of a reservoir, there are two that can be addressed with engineered reservoir fluid solutions… Formation damage and decrease of reservoir permeability.
- There are several causes of formation damage associated with drill-n and completion fluids. Three of them, like the fluid invasion, foreign particle invasion/plugging and the formation clay dispersion/migration can be control by the use of the right filtration control agents, bridging material and compatible salts. However that leaves some of the issues without a plausible solution in the current state of the drill-n systems and opens the question, what can be done? How can we address these other issues and improve the effectiveness of our Reservoir fluids?
- How are we linked? Our Core Value – Engineered fluid & Waste management solutions customized to maximize wellbore value. Engineered Fluid – Providing a highly inhibited fluid so as to negate problems of reactive clays and gas hydrates. High weighted fluid for well stability and cutting carrying capacity. Zero Discharge - Having a closed loop system help us to re-use the mud system and can process the mud coming from down-hole, having our BSS arrangement on the deck.
- The dual gradient drilling approach establishes the drilling mud hydrostatic gradient at the seafloor which allows for the use of heavier drilling muds with an advantageous pressure increase with depth. The use of optimized drilling mud provides better well control and fewer casing points by keeping the drilling fluid within the drilling “window” for more depths within the borehole.
- The suction module (SMO) is mounted on the low-pressure wellhead on surface and run with the jet and drill-ahead string. The cylindrical open-topped SMO receives the return mud and cuttings as they exit the wellhead. The SMO provides a connection point for the suction hose and has provisions for monitoring the height of mud in the SMO. By controlling the height of the mud in the SMO to a constant level, mud and cuttings are returned to surface at the same rate as they exit the wellbore. The level of the mud is monitored both with redundant lighted cameras and a pressure transducer sensing the hydrostatic pressure of the column of mud in the SMO.
- The lower SPM contains three electrically driven disc pumps that allow for pumping of the cuttings-laden return mud with minimal damage to the cuttings. The disc pumps allow for passage of particles up to 20-in. (50.8-cm) diameter. The lower SPM mounting to the LDJ, which provides both structural and suction and discharge connections for the pumped fluid, is performed at surface using the SPM handling frame. The upper SPM, similar to the lower SPM, contains three electrically driven disc pumps to boost the cuttings-laden return mud with minimal damage to the cuttings. The upper SPM connection to the UDJ, which is performed at surface using the SPM handling frame, provides a firm structural and both suction and discharge piping connection for the pumped fluid.
- DRIL-N STIM™ filtrate additive addresses fluid-related causes of formation damage, such as emulsion and water blocking, and oil-wetting of reservoir rock.
- The suction hose provides the flow path between the SMO and the lower docking joint (LDJ). The submerged suction hose weight is reduced with buoyancy to allow for easy installation with the ROV. The LDJ is mounted in-line with the MRL and provides for both structural connection of the lower SPM to the MRL and connection of the suction and discharge lines for the SPM. In addition to allowing for easy mounting of the SPM to the MRL at surface, the LDJ also provides the connection point between the MRL anchoring system and the MRL. The LDJ contains a tapered stress joint at the top end to minimize fatigue damage due to vortex-induced vibration (VIV). • The MRL anchoring system fixes the bottom end of the MRL to the seabed, holding the MRL away from the well and drillstring to avoid clash. The MRL anchoring system is not designed to restrain the MRL from vertical movement, only horizontal movement to maintain the MRL at a constant distance from the wellhead
- As with any technology, the RMR system has a number of limitations: 1. A preliminary inspection is required on the drilling rig to determine how best to accommodate the equipment on the deck. 2. Some minor modifications to the rig might be needed to accommodate the equipment (for example, connecting the flexible return hose to mud flow line, strengthening the deck before installing the equipment, Welding NDT and testing of umbilical winch under dynamic load after the equipment has been installed). 3. The maximum working water-depth is 1400 metres (4,593ft). 4. Most of the drilling rigs do not have a power capacity to feed the RMR® system. It might be necessary to mobilize a
- DRIL-N STIM™ filtrate additive addresses fluid-related causes of formation damage, such as emulsion and water blocking, and oil-wetting of reservoir rock.
- AGR’s Riserless Mud Recovery component of the system has been used successfully on a number of shallow water riserless drilling applications. The first commercial application was for BP on the Azeri Field in the Caspian Sea in 2003. On this field, a total of 15 wells have been successfully completed using the RMR technology. Since then, 3 additional wells have been drilled on the deepwater Gunashli field and 1 well on Shah Deniz (1,280 ft water depth), also for BP in the Caspian Sea. In 2004, a North Sea field trial was carried out, funded by Demo 2000, Hydro, Statoil and AGR to qualify the RMR technology for the North Sea/NCS environment in water depths up to 1,500 f t. Recently the system has been applied on 1 well for Total UK, and another is planned this autumn. More and more focus is being seen on discharge to the marine environment. Russian authorities have been among the first to totally ban discharges from everything below the initial conductor. This has resulted in BP selecting RMR for 2 wells outside Sakhalin this summer in the Kaigansky-Vasukansky license area. At the time of this writing, 1 of these wells has been completed. Hydro/Gazprom have also selected RMR for an exploration well on Shtokman in the Barents Sea in order to meet discharge-to-environment requirements, and this operation was successfully completed late July 2006. Recently, AGR was awarded a contract for Shell for 12 wells on the Western Australia Drilling Project. These operationsoperations are expected to begin in November 2006.
- Riserless mud recovery technology is a technology whose time has come to continue development of its deepwater capability and to conduct deepwater field trials in earnest. Once this step is successfully taken in the evolution of deepwater drilling technology, several next steps that may now seem insurmountable will be enabled. Much of the key equipment required has already been either field proven or extensively shop-tested, and its design and configuration into a deepwater system will be completed.
- DRIL-N STIM™ filtrate additive addresses fluid-related causes of formation damage, such as emulsion and water blocking, and oil-wetting of reservoir rock.
- DRIL-N STIM™ filtrate additive addresses fluid-related causes of formation damage, such as emulsion and water blocking, and oil-wetting of reservoir rock.
- In addition, successful new uses have included zero discharge of drilling fluid for wells offshore the Barents Sea, offshore Sakhalin, and Australia’s northwest shelf for environmental benefits, elimination of seabed discharges. Although most applications of this technology have been with floaters, a recent jackup operation offshore Egypt showed reduced well costs when using this technology allowed deletion of a shallow liner. The operator realized cost savings in excess of $2 million. Typical tophole drilling in the deepwater and ultra deepwater GoM is done using water-based fluids under “pump and dump” operations. Mud and cuttings are not recovered, but discharged and spread on the seabed around the wellhead. Use of this RMR technology would return cuttings and mud to the rig from the wellhead, providing benefits in well construction and in reduced environmental impact.
- DRIL-N STIM™ filtrate additive addresses fluid-related causes of formation damage, such as emulsion and water blocking, and oil-wetting of reservoir rock.