Controlled Mud Level Managed Pressure Drilling System … · Controlled Mud Level Managed Pressure...

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

Controlled Mud Level Subsea Pumping History

All content in this presentation is confidential and the property of Enhanced Drilling.

Conventional Top-hole Drilling

Seabed

Drill

Pipe


Cuttings Transport System (CTS)

5

Umbilical to surface

Subsea Pump Module (disk pump)

6in suction hose w/ROV connections

Suction Module

Diffuser

10in discharge hose w/ROV connections


RMR® Riserless Mud Recovery

Mud Return Line

Suction Module Suction Pump Module

Umbilical


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


8

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


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

9

EC-Drill® Controlled Mud Level MPD

10


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


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

Rig Integration

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

15


Moonpool – Equipment

Office Tool Container

Launch and Retrieval System

Reel

Control Container

Subsea Pump Module

Alternative to Pressurized Mud Cap Drilling

or Floating Mud Cap

CMCD Controlled Mud Cap Drilling

Challenges in Karstified Carbonates

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


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


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


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


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

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