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Managed Pressure DrillingSociety of Petroleum Engineers-
Ghana
Kenny Thomson
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KennyThomson
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To Give an introduction to Transocean and our operations in
GhanaTransocean and our operations in Ghana
I t d M d P D illi Introduce Managed Pressure Drilling Explain
Conventional drilling
E l i M d P D illi Explain Managed Pressure Drilling Advantages
of MPD MPD Equipment and Rig ConsiderationsMPD Equipment and Rig
Considerations MPD risks and control measures MPD Rewards History /
Future of MPD
Close with Questions and Discussion3
Close with Questions and Discussion
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129 Offshore drilling units50 Offices and Training centres
C4
30 Countries6 of the worlds 7 Continents
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50 High-Specification Floaters
25 Mid Water Floaters25 Mid-Water Floaters
9 High Spec Jack Ups9 High-Spec Jack-Ups44 Standard Jack-ups
2 Ultra Deepwater Drillships4 High-Spec Jack-Ups
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g p pUnder Construction
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G lf f G i R iGulf of Guinea Region
DSP MAR 702MTR ADX
135ENR
MTRBAL
ADX
AD9Hi7MGL
JRY
Ult D t D ill hi 2
Region Summary
Ultra Deepwater Drillships 2Semi Submersibles 4Jack-Ups 6
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Jack-Ups 6
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GSF Monitor
Jack-up rig Bottom Supportedpp 25ft-400ft Water
DepthDepth Cte d'Ivoire
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Transocean MarianasSedco Energy
MAR MAR Semi-Submersible
M d Basic spec Moored 7000ft of water
ENR ENR Semi-Submersible
Dynamically positioned8
Dynamically positioned 7500ft of water
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Discoverer Spirit
Dynamically positioned 10,000ft of water Self Propelled Drill
ship Liberia
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Transocean People
18,000+ Employees globally
Transocean will be Universally recognized for
, p y g y
innovation and excellence in unlocking the worldsoffshore
resources
We will be ourCustomers trusted
partner and their ppreferred solution
Provider
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MPD Definitione t o
An adaptive drilling process used to precisely control the
annular pressure profile throughout the wellbore
I t ti l A i ti
fInternationalAssociationofDrillingContractors
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Conventional SurfaceEEq.
TopDrive
Shaker
Mud PitMud Pump
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Conventional Drilling
Drillingfluidpumpeddownstring
Returnsbackupannulustosurface
Drilling fluid provides a barrier against
p
Drilling fluid provides a barrier against formation pressure
To Prevent influx to the wellbore:Bottom Hole Pressure must be
greater than
BlowOutPreventor
Formation Pressure
BHP = Phyd + PcircBHP Pf
13FormationPressure
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Drilling Window
TheoreticalWellProfilewithstraightlines
LessthanPorePressure=Influxto Wellbore
WellDepth
Fracture
toWellbore
GreaterthanFracturePressureFracture
Pressure
Pore Pressure Drilling
=Breakdownofformationie FluidlossesPorePressure
Windowlosses
14Pressure
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ConnectionsWhile drilling:
BHP = Phyd + PcircDrill pipesDrill pipes
rackedrackedTop Drive,Top Drive,Rotates andRotates and
y
When stopping circulation for Connections:
BHP = Phyd + PcircRotates andRotates andcirculates
fluidcirculates fluidthrough drillthrough drill
Connectionstringstring
Connection
WellDepth
FracturePressure
PorePressureBottomHolePressure
15Top of drill stringTop of drill string Pressure
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Real life well diagram
Narrow DrillingNarrowDrillingWindow
W ll
Cannotaffordtoloosethe
pressure fromWellDepth
pressurefromCirculation,willtakeaninflux
FracturePressure
Cannotincreasemud density,will
PorePressuremuddensity,willbreakdownformation
16Pressure
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Real life well diagram
Narrow DrillingNarrowDrillingWindowThisWellisThisWellis
UnUnDrillable!Drillable!Fault
W ll
Cannotaffordtoloosethe
pressure fromNarrow
Fault
WellDepth
pressurefromCirculation,willtakeaninflux
DrillingWindowShale
FracturePressure
Cannotincreasemud density,willSand
PorePressuremuddensity,willbreakdownformation
Sand
17Pressure
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MPDC k P i l U d ill blCan make Previously Un-drillablewells,
Drillable.
Two main reasons: Constant Circulation through connections
Pressurised fluid system, back pressure applied y , p pp
at surface to act through entire system
Constant and Controlled Bottom Hole Pressure throughout entire
section.
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Advantages of MPD
DrillingwithMPDSurfaceBackPressure
FluidDensity+Friction
DrillthroughNarrowDrillingWindows
g
+backpressureNolossinBottomHole
Pressure during
WellDepth
Pressureduringconnections
Depth
Staticweight:
Increasedvisibilityofunfavourablewell
conditionsFluiddensity
conditions
Greatercontrolofdownb h l
19Pressure
bottomholepressure
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MPD Surface Eq.
TopDrive
Mud Gas separator
Constant circulation
Shaker
3PartTelescopicJoint
Mud PitMud Pump
RCD(RotatingCirculatingDevice)
SurfaceAnnularFlowSpool
Choke manifold
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TopofMarineRiser
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MPD EquipmentCirculating SubsCirculating Subs
Next standNextstandofDrillpipeAddition to Drill floor
mud manifold
Side entry subs on top of each drill pipe
CheckValves
of each drill pipe stand
Valves
Drilling fluid routed through Side inletthrough Side inlet
hose during connections
Sideinlethose
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MPD EquipmentRotating circulating device; RCDRotating
circulating device; RCD
Sealingelements
sealaroundBearing
rotates with
Positioned in Marine riser string near surface
drillpiperotateswith
drillpipeSealing elements are tight against drillpipe
Elements housed in bearing which rotates with drillpipec otates
t d p pe
System is pressurized below RCDRCD
Preventsreturns fluid
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returnsfluidpassinguptheannulus
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MPD EquipmentFlow Spool Surface AnnularFlow Spool, Surface
Annular
RCD
Flow spool directs returning fluid from annulus through flexible
flow lines
SurfaceSurfaceannular
FlowSpoolpFlowlines
Surface annular in place in case of emergency where annulus
pressure may exceed RCD pressure rating.
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TopofMarineRiser
y g Annular can be closed to work on RCD while
maintaining pressurised system
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MPD EquipmentChoke ManifoldChoke Manifold
Coriolismeter
Downstreamfluidflow
All returns fluid passes through Choke Manifold
Hydraulic chokes are where surface back pressure is
applied
Coriolis Mass flow meterCoriolis Mass flow meter
All fluid downstream of
Flowlinehoses
Choke Manifold is atmospheric pressure
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MPD EquipmentMud Gas Separator cuttings cleaningMud Gas
Separator, cuttings cleaning
MGS
If gas is detected in returns fluid, it is routed through MGSit
is routed through MGS
Gas is vented up to highest point on rig at tip of derrick
Fluid continues to ShakersFluid continues to Shakers where
solids are removed
Everything thereafter is the same as conventional drilling
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MPD EquipmentControl and Display systemControl and Display
system
FlowInChoke
positionBackPressure
FlowOut
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Rig Considerations MPD equipment in moonpool
Non MPD moonpool
T l i J i tChokeManifoldTelescopicJointRCDSurfaceAnnularFlow
Spool
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FlowSpool
TopofMarineRiser
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Rig Considerations
E h i i i ith diff t d i d i t Each rig is unique with different
designs and equipment MPD compatibility is a large scale
engineering project
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Rig Considerations
Non standard operationp
We introduce newMPD rig up in moonpool
Operating procedures, Testing regimes,
Maintenance plans andMaintenance plans and Rig up procedures
New to our crews, trainingand familiarisation is
essentialessential.
Training helps ensure a
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safe and efficientoperation
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Risks of MPD &CControls in place
No Static flow check Example Signature tests and trends
observed
Downhole problems may be masked by Constant Circulation and
SurfaceCirculation and Surface
Pressure
Controls: Signature testing
provides expectedprovides expected trends
Close monitoring of trends carried out by
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trends carried out by MPD operator
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Risks of MPD &C
DrillingwithMPDSurfaceBackPressure
Controls in place
Loss of back pressureor circulation FluidDensity
+Friction
g
Well will gounderbalance
+backpressure
underbalance Influx may be taken Well
DepthControls:
Redundancy of circulating equipment
Depth
Staticweight:circulating equipment Two chokes in choke
manifold
Fluiddensity
Pressure
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Risks of MPD &C
Plugging of surface equipment
Controls in place
Controls: Built in redundancy
Flushing points
6Fl li
4ChokeManifold 6linesbackto
shakers
3218Marine
Riser
Flowlines shakers
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Rewards of MPD
Thisisis toScale!!
Early Kick DetectionScale!!
People
Assets
Environment
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MPD HistoryRig Name Rig Type Location Customer Year Application
Status
Trident 8 Jack Up Cabinda Gulf 2003 PMCD Completed
Sedco 601 Semi Sub Indonesia Santos 2004 PMCD w/ Surface BOP
Completed
Sedco 601 Semi Sub Indonesia Santos 2005 - 2006 PMCD w/ Risercap
Completed
Roger W. Mowell Jack Up Malaysia Talisman 2006 - 2007 CBHP
Completed
Constellation II Jack Up Egypt BP 2007 CBHP HPHT
CompletedConstellation II Jack Up Egypt BP 2007 CBHP, HPHT
Completed
High Island VII Jack Up Gabon Total 2007 CBHP, HPHT
Completed
Deepwater Frontier DP Drillship India Reliance 2007 CBHP,
Concentric Riser Completed
Actinia Semi Sub India Reliance 2008 CBHP, Concentric Riser
Completed
Arctic III Semi Sub Libya ENI 2008 - 2009 ECD, HPHT,
Reconfigurable Riser Completed
Harvey H. Ward Jack Up Malaysia Talisman 2009 CBHP Completed
Shelf Explorer Jack Up Malaysia Talisman 2009 CBHP Completed
Trident IX Jack Up Indonesia Pearl 2010 UBD (Low Head Drilling)
CompletedTrident IX Jack Up Indonesia Pearl 2010 UBD (Low Head
Drilling) Completed
Sedco 601 Semi Sub Malaysia Petronas 2010 CBHP Completed
GSF Explorer DP Drillship Indonesia MSEC 2010 - 2011 CBHP, PMCD,
Riser Degassing Ongoing
GSF Rig 135 Semi Sub Nigeria Addax 2011 - 2012 CBHP, HPHT
Completed
Actinia Semi Sub Malaysia Petronas 2011 - 2012 PMCD w/Risercap
Completed
Marianas Semi Sub Ghana ENI 2012 CBHP, HP Completed
HH Ward Jack Up Indonesia Pertamina 2012 PMCD Ongoing
34PMCD PressurizedMudCapDrillingCBHP
ConstantBottomHolePressure
HPHT HighPressureandHighTemperature
UBD UnderBalancedDrilling
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MPD Future / CAPMC t t A l P M t
CAPM is a Transocean product D l G di t D illi Hi h d it d h l
li ht fl id i i i
Constant Annular Pressure Management
Dual Gradient Drilling- Higher density down hole, lighter fluid
in marine riser Closed circulating system for enhanced kick
detection
BendingtheCurve
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ginDeepwater
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Sunset,April13th 2012TransoceanMarianas
To Give and introduction to Transocean and our operations in
GhanaIntroduce Managed Pressure DrillingIntroduce Managed Pressure
Drilling
Advantages:ConstantBottomHolePressure Questions?
Response
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NavigateNarrowDrillingWindowsEarlyKickDetection
ResponseDiscussion.
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Contact details:
Managed Pressure Drilling Ghana Human ResourcesManaged Pressure
Drillingin Gulf of Guinea
Kenny Thomson (Nigeria)
Ghana Human ResourcesEnquiries
Sheila Ocansey (Ghana)y ( g )[email protected]+234 813
767 4883
y ( )[email protected]+233 302 743906
Managed Pressure Drilling Managed Pressure Drillingg gand
CAPM
Iain Sneddon (UK)
g gand CAPM
John Kozicz (US)[email protected]+44 1224 427759
[email protected]+1 713/232-7388
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