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TRANSCRIPT
Controlled Mud Level Managed Pressure Drilling System
for Use in Deep Water
INTSOK Deepwater and Harsh Environments Seminar
November 10, 2016 St. John’s Canada
CONFIDENTIALITY
The information contained in this presentation is CONFIDENTIAL and is intended for INTSOK Seminar November 10, 2016, use only. Copyright of all published material including photographs, drawings and images in this document remains vested in Enhanced Drilling and third party contributors as appropriate. Accordingly, neither the whole nor any part of this document shall be reproduced in any form nor used in any manner without express prior permission and applicable acknowledgements. No trademark, copyright or other notice shall be altered or removed from any reproduction. Any unauthorized use; dissemination of the information or copying of this presentation in whole or part is prohibited.
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While the information contained in this presentation is believed to be accurate, Enhanced Drilling has not conducted any investigation with respect to such information. Enhanced Drilling, its officers, directors and/or employees, expressly disclaim any and all liability, and do not give any representations or warranties expressed or implied, related to or for the information contained in, or for omissions from, this presentation or any other written or oral communication transmitted to any interested party in connection with this presentation so far as is permitted by law. In particular, but without limitation, no representation or warranty is given as to the achievement or reasonableness of, and no reliance should be placed on, any projections, estimates, forecasts, analyses or forward looking statements contained in this presentation which involve by their nature a number of risks, uncertainties or assumptions that could cause actual results or events to differ materially from those expressed or implied in this presentation. Neither Enhanced Drilling, its officers, directors and/or employees, will have any liability to you or any other person resulting from your use of information contained in this presentation.
DISCLAIMER
All content in this presentation is confidential and the property of Enhanced Drilling.
Conventional Top-hole Drilling
Seabed
Drill
Pipe
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Cuttings Transport System (CTS)
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Umbilical to surface
Subsea Pump Module (disk pump)
6in suction hose w/ROV connections
Suction Module
Diffuser
10in discharge hose w/ROV connections
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RMR® Riserless Mud Recovery
Mud Return Line
Suction Module Suction Pump Module
Umbilical
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Controlled Mud Level (CML)
• Managed Pressure Drilling (MPD)
• CML is IADC designation
• Subsea Pump Module (SPM) installed on drilling riser
• Drilling fluid returned up separate Mud Return Line (MRL)
• Adjusting riser fluid level manages wellbore pressure profile
Bar/Psi Primary Barrier Envelope
1. Drilling fluid
Secondary Barrier Envelope
1. Casing/cement
2. Wellhead
3. SS BOP
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EC-Drill® Managed Pressure Drilling System
• A step-change technology: Enables operators to “drill the undrillable well”
• Controlled Mud Level (CML) system
• Allows operators control of bottom
hole pressure to drill: o Narrow pressure windows in
deep water o Underbalanced formation o Manage Equivalent Circulating
Density (ECD)
• Safety enhancing, cost saving
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Operations Statistics (as of 2015)
• Cuttings Transport System (CTS)
• 454 operations
• First deployment 1998 in Gullfaks field, Norway
• CTS was first used in Canada by Husky Oil in 2003, on the White Rose field from the Glomar Grand Banks rig
• Riserless Mud Recovery (RMR®)
• 272 operations
• First deployment 2003 in West Azeri field
• EC-Drill®
• 13 operations
• First deployment 2012 Offshore Cuba
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RIVs
Suction Pipe
Suction Pressure Sensor
Modified Riser Joint
SS BOP Mud line
MRL
Sea Level
1,2
00 f
t ty
p
(366 m
)
Mari
ne D
rillin
g R
iser
CML Managed Pressure Drilling System
All content in this presentation is confidential and the property of Enhanced Drilling.
CML Operation
System Components
Topfill Pump
Return Flow Meter
Umbilical Winch
Control Container & Office Tool Container
Deployment Trolley
SPM
Modified Riser Joint
MRL
Driller’s Cabin
Modified Riser Joint (MRJ)
Riser isolation valves with ROV override, FSC
2 x pressure sensors
6.8 in. Riser outlet block
6’’ pin connector
Docking plate with Guide pin
Typical MRJ
Protection & guide structure
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Moonpool – Equipment
Office Tool Container
Launch and Retrieval System
Reel
Control Container
Subsea Pump Module
Drill in Controlled Mud Level (CML) mode Riser Level 30m static 60m dynamic Boost pump 800 LPM HAM in Topfill pump 200 LPM HAM in Mud pump 850 LPM HAM in SPM 1,850 LPM HAM out
Drill – Enter Karst/Total Losses Riser Level dropping Boost pump off Topfill pump off Mud pump off SPM off
Drill in Controlled Mud Cap (CMCD) mode Riser Level static net – 500 lpm loss dynamic net – 150 lpm loss Boost pump 800 LPM HAM in Topfill pump 200 LPM HAM in Mud pump 1,000 LPM SAC in SPM 500 - 850 LPM HAM out
Drill CML Mode
Drill – Enter Karst
Drill CMCP Mode
Low V Hi V
HAM = Heavy annular mud
SAC = Sacrificial fluid - seawater
CML to CMCD Simple Animation
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Riser Fluid Level
• Observe riser level o Higher level = Higher
Hydrostatic Pressure
o Higher Hydrostatic pressure overbalance versus reservoir pressure increases downward mud velocity
• Change level o Adjust topside pumps
o Achieve higher downward mud velocity in BHA/Hole annulus than upward gas migration velocity
V
V v v
Riser
Level P
P
PRES
Balance
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CMCD Results: Minimum Downward HAM Velocity – Stop Gas
Pipe in Hole
Min: 0.35 ft/sec
Max: 0.55 ft/sec
Gas migration
(l/min) (gpm)
1 0 0.0
2 73 19.4
3 147 38.7
4 220 58.1
5 293 77.5
6 367 96.9
7 440 116.2
8 513 135.6
9 587 155.0
10 660 174.4
11 733 193.7
12 807 213.1
13 880 232.5
14 953 251.9
15 1027 271.2
16 1100 290.6
CASEANN INJ RATE
OH (6") x 4.75" OH x 4" 7" x 4.75" 7" x 4" 9 5/8" x 4" 9 5/8" x 5" 13 3/8" x 5" 19.25" x 5"
10.554 15.708 12.315 17.469 46.621 39.552 100.098 271.404
0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000
0.5890 0.3957 0.5048 0.3558 0.1333 0.1572 0.0621 0.0229
1.1780 0.7914 1.0095 0.7117 0.2667 0.3143 0.1242 0.0458
1.7669 1.1872 1.5143 1.0675 0.4000 0.4715 0.1863 0.0687
2.3559 1.5829 2.0191 1.4233 0.5333 0.6286 0.2484 0.0916
2.9449 1.9786 2.5238 1.7792 0.6666 0.7858 0.3105 0.1145
3.5339 2.3743 3.0286 2.1350 0.8000 0.9429 0.3726 0.1374
4.1229 2.7700 3.5334 2.4908 0.9333 1.1001 0.4347 0.1603
4.7118 3.1658 4.0381 2.8467 1.0666 1.2573 0.4968 0.1832
5.3008 3.5615 4.5429 3.2025 1.2000 1.4144 0.5589 0.2061
5.8898 3.9572 5.0477 3.5583 1.3333 1.5716 0.6210 0.2290
6.4788 4.3529 5.5524 3.9142 1.4666 1.7287 0.6831 0.2519
7.0678 4.7487 6.0572 4.2700 1.6000 1.8859 0.7452 0.2748
7.6567 5.1444 6.5620 4.6258 1.7333 2.0430 0.8073 0.2977
8.2457 5.5401 7.0667 4.9817 1.8666 2.2002 0.8694 0.3206
#N/A #N/A #N/A #N/A #N/A #N/A #N/A #N/A
Pipe in Hole
FLOW VELOCITY
From Blade Energy Analysis/Report
All content in this presentation is confidential and the property of Enhanced Drilling.
CMCD Results: Minimum Downward HAM Velocity – Stop Gas
No Pipe in Hole
Min: 0.35 ft/sec
Max: 0.55 ft/sec
Gas migration
(l/min) (gpm)
1 0 0.0
2 73 19.4
3 147 38.7
4 220 58.1
5 293 77.5
6 367 96.9
7 440 116.2
8 513 135.6
9 587 155.0
10 660 174.4
11 733 193.7
12 807 213.1
13 880 232.5
14 953 251.9
15 1027 271.2
16 1100 290.6
CASEANN INJ RATE
OH (6") 7" 9 5/8" 13 3/8" 19.25"
28.274 30.035 59.187 119.733 291.039
0.0000 0.0000 0.0000 0.0000 0.0000
0.2198 0.2070 0.1050 0.0519 0.0214
0.4397 0.4139 0.2100 0.1038 0.0427
0.6595 0.6209 0.3151 0.1557 0.0641
0.8794 0.8278 0.4201 0.2077 0.0854
1.0992 1.0348 0.5251 0.2596 0.1068
1.3191 1.2417 0.6301 0.3115 0.1281
1.5389 1.4487 0.7352 0.3634 0.1495
1.7588 1.6557 0.8402 0.4153 0.1709
1.9786 1.8626 0.9452 0.4672 0.1922
2.1984 2.0696 1.0502 0.5192 0.2136
2.4183 2.2765 1.1552 0.5711 0.2349
2.6381 2.4835 1.2603 0.6230 0.2563
2.8580 2.6904 1.3653 0.6749 0.2777
3.0778 2.8974 1.4703 0.7268 0.2990
#N/A #N/A #N/A #N/A #N/A
No Pipe in Hole
FLOW VELOCITY
From Blade Energy Analysis/Report
All content in this presentation is confidential and the property of Enhanced Drilling.
Summary
• Logical progression of subsea bottom-hole pressure control
• CTS > RMR > CML > CMCD
• CML represents a better approach to MPD
• Narrow pore/fracture pressure windows
• Depleted underbalanced formations
• Controls ECD
• Equipment
• Proven over many years and wells
• Minimal rig integration requirements
• Uses convention barriers and well control
• Progressing technology 23