SIEM WIS AS

Siem WIS Background, Challenges, Technology and

Solutions

SIEM WIS ASBackground

Well Intervention Solutions AS (Siem WIS), was established in February 2005 and is located at Sotra, outside Bergen Norway

Siem WIS has extensive experience from the oil service industry through its employees, respectively from Transocean, AGR Ability Group, Schlumberger, KCA Deutag, FMC Technologies, Baker Hughes Inteq and PGS.

- Core experiences:

Technology development

Engineering

Project management

Operations

Riserless Intervention

Riserless Drilling

Well Intervention and drilling services

SIEM WIS AS

The industry has major possibilities to increase oil recovery, by development and utilization of new technology

The Siem WIS technology represents;

- Add-on solutions to existing operational challenges

- Safer and more efficient operations

The Siem WIS solutions will represent minimum implications to existing systems

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

Background

SIEM WIS AS

Variation of dynamic behavior in the mud column during drilling operations, caused by reduction or stoppage of mud pumping, whenmaking or breaking drillpipe

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

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

Requirement for stable Equivalent Circulation Density (ECD)

Challenges - drilling depleted reservoir or drilling through coal

SIEM WIS ASVariation in ECD “ballooning effect” narrow pore pressure/fracture

gradient window

Pumps on and off during connections

Margin +/- 2 barContinuous circulation

Margin +/- 12 bar

SIEM WIS ASNormal drilling MPD set-up

SIEM WIS ASCirculation device drilling set-up

SIEM WIS AS|

SIEM WIS ASSiem WIS CircSubTM -advantages/disadvantages

Drilled Length/WellExtension

Equipment Lifetime

Time: Connections

Time: Testing

Time: HandlingConnection Influx

Eliminate a casing

Hole stability

Hole cleaning

Continuous Logging

Managed PressureDrilling

CircSubTM Footprint

SIEM WIS ASSeal test setup.

SIEM WIS AS

How to seal around drillpipe to control well pressure

Challenge –Establish a closed mud loop for Managed Pressure Drilling application

SIEM WIS ASRetrievable seal solution

The set-up shows the SiemWIS seal as a part of the riser configuration. This solution will eliminate the need for high pressure equipment above the seal.The retrievable sealing elements are run piggy back through the riser.

SIEM WIS ASSiem WIS solution

By combining existing MPD configuration with Siem WIS CircSub and Siem WIS Seal, a complete and efficient service can be established

SIEM WIS ASManaged pressure drilling set-up

MUD PUMPS

PITS

Continous Circulation

Device

WISSEAL

MPD Choke Manifold

Kill Line

Choke Line

Return LineAnnular

Shakers

Kill / M

eg

Return / Choke

Drain Line

Separator

Gas flareTopDrive

MUD PUMPS

Drillfloor

Topside

SIEM WIS AS“The Vision”

SIEM WIS AS

How to enable economic, complete, riserless subsea well intervention services to be performed from vessels

Riserless Subsea Well Intervention!

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 control intervention

valve

PITS

Continous Circulation Device

RIG Choke Manifold / Secure drilling manifold

Shakers

Drain Line

Separator

Gas flareTopDrive

Top Side

Mud Pumps

Drill Floor

Subsea pump / Control module

SIEM WIS ASVessel potential with Siem WIS technology

Vessel solution Siem WIS solution

SIEM WIS ASRiserless managed pressure drilling set-up