MPD cbm

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SIEM WIS AS

Siem WISBackground, Challenges, Technology and

Solutions

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SIEM WIS AS

Backgroundz Well Intervention Solutions AS (Siem WIS), was established in February

2005 and is located at Sotra, outside Bergen Norway

z Siem WIS has extensive experience from the oil service industry throughits employees, respectively from Transocean, AGR Ability Group,Schlumberger, KCA Deutag, FMC Technologies, Baker Hughes Inteq andPGS.

- Core experiences:

Technology development

Engineering

Project management

Operations

Riserless Intervention

Riserless Drilling

Well Intervention and drilling services

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SIEM WIS AS

z The industry has major possibilities to increase oil recovery, by

development and utilization of new technologyz The Siem WIS technology represents;

- Add-on solutions to existing operational challenges

- Safer and more efficient operations

z The Siem WIS solutions will represent minimum implications toexisting systems

z By identifying challenges, and applying innovation andexpertise, simple and reliable solutions are provided

Background

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SIEM WIS AS

z Variation of dynamic behavior in the mud column during drillingoperations, caused by reduction or stoppage of mud pumping, when

making or breaking drillpipe

z Due to rapid depletion of many reservoirs globally after production start,drilling of new wells will be a challenge

z

The demand to achieve a more constant well pressure during drilling andtripping operations is increasing as a function of the depletion of thereservoir. The narrow pressure window between the pore- and fracturepressure is challenging in all depleted reservoirs.

z Requirement for stable Equivalent Circulation Density (ECD)

Challenges - drilling depleted reservoiror drilling through coal

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SIEM WIS AS Variation in ECD “ballooning effect”

narrow pore pressure/fracturegradient window

Pumps on and off

during connections

Margin +/- 2 bar

Continuous circulation

Margin +/- 12 bar

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SIEM WIS AS

Normal drilling MPD set-up

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SIEM WIS ASCirculation device drilling

set-up

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SIEM WIS AS|

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SIEM WIS ASSiem WIS CircSubTM -

advantages/disadvantagesDrilled Length/Well

Extension

Equipment Lifetime

Time: Connections

Time: Test ing

Time: Handling

Connection Influx

Eliminate a casing

Hole stability

Hole cleaning

Continuous Logging

Managed Pressure

Drilling

CircSubTM Footprint

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SIEM WIS ASSeal test setup.

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SIEM WIS AS

z How to seal around drillpipe to control well pressure

Challenge –Establish a closed mud loop for ManagedPressure Drilling application

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SIEM WIS AS

Retrievable seal solution

The set-up shows the SiemWIS seal as apart of the riser configuration. Thissolution will eliminate the need for highpressure equipment above the seal.The retrievable sealing elements are runpiggy back through the riser.

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SIEM WIS AS

Siem WIS solutionz By combining existing MPD configuration with Siem WIS

CircSub and Siem WIS Seal, a complete and efficient servicecan be established

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SIEM WIS ASManaged pressure drilling

set-up

MUD PUMPS

PITS

Continous

Circulation

Device

WIS

SEAL

MPD Choke Manifold

Kill Line

Choke Line

Return Line Annular

Shakers

K i l l / M e

g

Return / Choke

Drain Line

Separator

Gas flare

TopDrive

MUD PUMPS

Drillfloor

Topside

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SIEM WIS AS “The Vision”

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SIEM WIS AS

z How to enable economic, complete, riserless subsea wellintervention services to be performed from vessels

Riserless Subsea Well

Intervention!

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SIEM WIS ASSiem WIS

solution

WISSEAL

Annular

SEA BED

6" Flexible composite riser system

2" Megline / Kill line

3" Fluid return line / Choke line

Power 3kv & Signals

2500 mtr

Kill / Choke

Mud return

Remote controlintervention

valve

PITS

Continous Circulation

Device RIG Choke Manifold /Secure drilling manifold

Shakers

Drain

Line

Separator

Gas flare

TopDrive

Top Side

MudPumps

Drill Floor

Subsea pump /

Control module

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SIEM WIS AS Vessel potential with Siem WIS technology

Vessel solution Siem WIS solution

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SIEM WIS ASRiserless managed pressure

drilling set-up

MPD cbm

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