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Expro's New Automatic Back Pressure System Performance drilling and control systems to optimize
well design, drilling performance and mitigate drilling
hazards.
Chance Knight, PowerChokes®
OTC Houston
May 2015
Introduction to Expro
Global market leader in well flow management
Market leading global provider of highly specialised well flow management services to
the oil and gas industry.
Specific focus on offshore, deep water and other technically challenging environments
with high barriers to entry.
Offer a range of mission critical services designed to measure, improve, control and
process flow from high value oil and gas wells:
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Well test and appraisal
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Subsea, completion and intervention services
•
Production services
•
Capabilities span the full life cycle of oil and gas field from exploration to
abandonment
Our vision is to be the market leader in well flow management, using the industry’s best
people, to deliver the highest standards of safety, quality and personalised customer
service.
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Presentation outline
• Overview
• Automatic Back Pressure (ABP) system
• Closed loop drilling system
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Expro PowerChokes®
Overview
•
History: PowerChokes® was formed in 1989 by two mechanical engineers with 48
years of combined experience
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Initial goal: service the US oil and gas drilling industry with rental chokes
•
Simple strategy: start with industry standard chokes then, improve choke products
and services to raise the industry standard
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Today: worldwide leader in severe service chokes, controls, instrumentation, and
Pressure Relief Valves (PRV)
•
Evolved into the market standard for severe duty chokes:
•
•
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Facility certified to ISO 9001 and API Q1, 6A and 16C
API audit for 2013 & 2014 resulted in ZERO findings
Equipment certified to ABS CDS, DNV, CE, PED, ATEX, IECEx, CSA, NEMA
© Copyright Expro 2015
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Expro PowerChokes®
The Automatic Back Pressure System (ABP)
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Expro’s new Automatic Back Pressure System (ABP), is a type of closed loop
performance drilling system that allows management of the bottom hole pressure
using a standard PowerChokes® choke or drilling manifold
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The ABP is also called a set-point system
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Once the set-point pressure is input, the ABP automatically maintains that pressure
through both influx and loss events
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As the well conditions change the set pressure can be changed as needed at the touch
screen HMI
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A connection set-point allows for faster more efficient connections and more
accurately manage bottom hole pressure during connections
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Expro PowerChokes®
Closed loop drilling overview
Closed loop drilling
• Containing the entire wellbore circulation
• Allows manipulation of the pressure
• Creates tool for kick mitigation
RCD/
To Choke System
Diverter
Typical package
• Rotating Control Device (RCD) or diverter
• Choke and/or manifold for pressure
control
• Active control system
Annular
Preventer
BOP Stack
Advantages
• Choke allows for pressure manipulation
• Kicks can be brought to surface under
control
• Gas can be circulated out
• Downhole pressure can be managed.
• In most cases operators can drill ahead
during these events reducing NPT
Drill String
6
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Expro PowerChokes®
Closed loop drilling
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Back pressure on the wellbore increases or decreases the pressure on the reservoir,
which minimizes the need to increase or decrease the mud weight
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By using a choke to apply back pressure while circulating/drilling, the mud weight is
artificially increased or decreased, to manage the bottom hole pressure.
RCD
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Expro PowerChokes®
ABP advantages
Lower mud costs
• Reduce drilling fluid costs utilizing back pressure to optimize mud weights
• Management of depleted pore pressure and fluid loss situations. Minimize
unplanned fluid loss and drilling costs
Reduce drilling time
• By maintaining bottom hole pressure within a narrow pore pressure/fracture
pressure window and reducing well bore problems and Non Productive Time
(NPT)
• Optimize well/casing design by managing fluid weights and pore pressure it is
possible to influence casing points and potentially eliminate existing casing strings
• Optimization of Equivalent Circulating Density (ECD) and performance drilling
should lead to a direct ROP benefit.
• Effectively manage influx during connections automatically.
Safety
• Safely manage unplanned influx and well control issues efficiently
• Quickly detect changing well conditions for faster decision making
• Safely manage hydrocarbons during connections
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Expro PowerChokes®
Conventional drilling
Mud weight too
light - influx
Pore
pressure
Frac
pressure
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Expro PowerChokes®
Conventional drilling
Mud weight too
heavy – damage to
reservoir
Pore
pressure
Frac
pressure
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Expro PowerChokes®
Conventional drilling
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•
•
•
•
Pore
pressure
Solution – increased
Casing strings
Mud costs
Drilling time
AFE
Frac
pressure
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Expro PowerChokes®
Automatic Back Pressure System (ABP)
By providing Surface Back-Pressure
during drilling and while making
connections, the mud weight is
manipulated, higher pump rates
can be use, and less chance of
damaging well bore.
ABP – Pumps On
ABP – Pumps Off
Pore
Pressure
Frac
Pressure
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Expro PowerChokes®
ABP features
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Allows for drilling into tighter pressure gradients and maintain bottom hole pressure at
+/-20 PSI
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A connection setpoint will allow for reliable management of hydrocarbons during
connections
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Change the desired setpoint as needed, manually at control panel or by remote signal
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Backpressure can be controlled manually at any time
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Touch screen control panel can be conveniently located anywhere on the rig for
complete control
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All display variables have adjustable HI/LO alarms
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Data can be seamlessly transmitted to client systems for remote real-time
monitoring
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Expro PowerChokes®
ABP main screen
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Expro PowerChokes®
Analysis
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Expro PowerChokes®
Automatic Backpressure System (ABP)
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Thank you:
any questions?
Chance Knight
Business Development Manager
PowerChokes®
Chance.knight@exprogroup.com
Tel: +1 281-997-2566