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MANAGED PRESSURE DRILLING MPD
UNDER BALANCED DRILLING UBD
EXTENDED REACH DRILLING ERD
DEEP WATER DRILLING
ReelwellDrillingMethod
HOLECLEANING
CONTROLLEDPRESSURE
DOWNHOLEISOLATION
HYDRAULICWOB
- drilling beyond boundaries
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LINER
DRILLING
HYDRAULIC
WOB
LOW COST
DRILLING FLUID
PRESSURELESS
CONNECTIONS
HOLE
CLEANING
CONTROLLED
PRESSURE
DOWNHOLE
ISOLATION
KEY FEATURES
Great benets
from RDM
APPLICATIONS
MANAGED PRESSURE DRILLING (MPD)
UNDER BALANCED DRILLING (UBD)
EXTENDED REACH DRILLING (ERD)
DEEP WATER DRILLING
Conventional
drilling
Drilling beyond boundariesReelwell AS challenges conventional drilling and introduces the REELWELL DRILLING METHOD(RDM).
The method implies accurate pressure management and improved well control through closed loop uid circulation,
especially attractive for Managed Pressure Drilling (MPD) and Under Balanced Drilling (UBD).
Through hydraulic Weight On Bit (WOB), RDM pushes limits for Extended Reach Drilling (ERD).
With all circulation being conned in the dual drill string, the method facilitates Deep Water Drilling.
The RDM increases hydrocarbon recovery while reducing environmental impact.
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CONVENTIONAL
DRILLING
FLUID TREATMENT
& CIRCULATION
SYSTEM
BOP
CASING
DRILL STRING
BOTTOM HOLE ASSEMBLY
REELWELL
DRILLING METHOD
TOP DRIVE
ADAPTER
DUAL DRILL STRING
CASING
BOP
RCD
DUAL FLOAT VALVE
PISTON
BOTTOM HOLE ASSEMBLY
FLUID TREATMENT
& CIRCULATION
SYSTEM
HYDRAULIC
SYSTEM
SYSTEMS OVERVIEW
The dual drill string, the top drive adapter, the dual oat valveand the piston are the key elements of the Reelwell drilling system.
The dual drill stringfacilitates closed loop circulation. Drill uid and cuttings are brought to surface through the center pipe, leaving the
wellbore annulus free of cuttings. This feature also allows for riserless drilling.
The top drive adapteris a dual conduit swivel for drilling uid.
The dual oat valveenables downhole isolation of the well. This facilitates controlled pressure drilling and pressureless pipe connections.
WOB is controlled through hydraulic pressure on top of the piston, pushing ERD limits.
The footprint from the the Reelwell Drilling Method is small. It is easily adaptable to all rig types with minimal modications and crew training.
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DOWNHOLEISOLATION
PRESSURECONTROL
LOW COSTDRILLING FLUID
Copyright
-drilling beyond boundaries
MANAGED PRESSURE DRILLING MPD
UNDER BALANCED DRILLING UBD
MPD and UBD are used for mature reservoirs where pressure is low due to depletion.
UBD implies that the well pressure is kept lower than the formation pressure avoiding the skin build-up.
The well is drilled with controlled inow.
MPD provides a well pressure equal to or slightly higher than the formation pressure. This is done by
applying a light drill uid and surface pressure control.
Reelwell Drilling Method pushing limits for
MPD &UBD
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Depth
Pressure
WELL
PRESSURE
CHOKE
PUMP
DUAL
FLOAT
VALVE
INNER DRILL STRING
DRILL STRING
P
Depth
Pressure
Depth
Pressure
3
Phone: + 47 51 87 49 10
Postal adress:
P.O. box 8034
4068 StavangerNORWAY
Visiting adress:
Prof. Olav Hanssens vei 7A
4021 StavangerNORWAY
www.reelwell.com
Precise pressure control
Connection Start up Drilling
DESCRIPTION
The RDM offers signicant advantage to reservoirs with pressurechallenges.
Precise well pressure control facilitates operations in well withnarrow operating pressure window.
Improved ECD control prevents pressure variations duringpump start and stop.
Precise volume management improves gain and loss control .
Loss of annular uid is prevented by physical barrier, reducingformation damage.
The active mud volume is reduced to about 50%.Lower circulation rates reduce energy consumption.
Downhole isolation improves overall safety.
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SPECIFICATIONS
Main components (size/weight)
Dual Float Valve:
Top Drive Adapter:
Dual Drill String:
Piston:
UAC:
Well control unit:
Performance
Downhole pressure uctuation:
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HOLECLEANING
HYDRAULICWOB
LINERDRILLING
Copyright
- drilling beyond boundaries
EXTENDED REACH DRILLING ERD
ERD is an extreme type of directional drilling for long horizontal wells. The aims of ERD are: 1) to reach a
larger area from one surface drilling location, or 2) to keep a well for a longer distance in a reservoir in order
to maximise its productivity and drainage capability.
Todays challenges in ERD are in cleaning of the hole and managing the mechanical loads on the drill string
as well as managing the downhole pressure. At present maximum horizontal drilling reach is approximately
12 km.
Reelwell Drilling Method pushing limits for
ERD
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10 km
20 km
CONVENTIONALREACH
RDM more than doubles the reach, hencequadruples the potential drainage area
Phone: + 47 51 87 49 10
Postal adress:
P.O. box 8034
4068 StavangerNORWAY
Visiting adress:
Prof. Olav Hanssens vei 7A
4021 StavangerNORWAY
www.reelwell.com
The ultimate reach
Hydraulic WOB by piston
DESCRIPTION
The Reelwell Drilling Method pushes present limits in Extended ReachDrilling (ERD).
Hydraulic WOB enables unique horizontal traction of drill string. Wellhydraulic calculations conrms reach beyond 20 km.
RDM offers superior hole cleaning as the drill cuttings are removed from thewellbore just behind the drill bit and routed back to surface via the innerstring.
Installing a liner below the piston enables lining the well while drilling.Liner expansion is performed by increasing hydraulic pressure above pistonwith the ultimate potential of making monodiameter wells.
The method provides access to reserves otherwise inaccessible from platformor location. This makes building of new facilities redundant, and will beadvantageous considering environmental issues and economical aspects.
Superior hole cleaning Liner drilling and liner expander
SPECIFICATIONS
Main components (size/weight)
Dual Float Valve:
Top Drive Adapter:
Dual Drill String:
Piston:
UAC:
Well control unit:
Performance
Downhole pressure uctuation:
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Reelwell AS is located at Ipark (formerly Rogaland Science Park) in Stavanger. Ipark forms part of the knowledge
community situated in Ullandhaug campus. Important partners are the International Research Institute of Stavanger
(IRIS) and the University of Stavanger (UiS). The site also includes Ullrigg Drilling & Well Centre - testing facilities for
drilling technology and downhole equipment.
Phone: + 47 51 87 49 10
Fax: + 47 51 87 49 11
Postal adress:
P.O. box 8034
4068 Stavanger
NORWAY
Visiting adress:
Prof. Olav Hanssens vei 7A
4021 Stavanger
NORWAY
www.reelwell.com
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