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Drilling hazard mitigation
Weatherford’s Managed Pressure
Drilling (MPD) Services
Leverage Weatherford’s extensive portfolio of MPD equipment and
associated expertise to maximize control of your wellbore’s pressure
prole, mitigate multiple drilling hazards, and ultimately makeotherwise undrillable prospects drillable.
More Productive DrillingSM
mpletion
duction
vention
rilling
luation
Drilling-with-casing (DwC™) systems
Secure DrillingSM
services
- Air drilling
- Downhole tools
- Fluid systems
- Managed pressure drilling
- Pressure-control equipment
- Underbalanced drilling
Solid expandable systems
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Nearly half of all drilling hazards are related
to wellbore pressure. Weatherford’s MPD
services can help you beat the odds.
More technology. Recognizing the value of MPD
as a powerful drilling hazard mitigation technique, we
began amassing the essential tools of the trade more
than 40 years ago. Today our expansive portfolio of MPD
equipment the world’s largest ranges from rotating
control devices (RCDs) to a state-of-the-art Microux™
control system.
More expertise. Drawing on our collective MPD
experience and specialized training, our global team of
highly skilled MPD specialists lend critical expertise to
your drilling operations.
More real results. Since 1968, we have been
providing MPD support to clients for drilling operations
throughout the world. Among other benets, our
services have minimized nonproductive time and ended
detrimental kick/loss cycles. And in some cases, we have
made undrillable prospects drillable.
As the oileld services industry’s largest global
provider of MPD services, we offer more
technology, expertise and real results.
2 © 2005-2010 Weatherford. All rights reserved.
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Weatherford’s Managed Pressure Drilling (MPD) Services
MPD = More Productive DrillingSM
An acronym for managed pressure drilling, MPD
could easily stand for “more productive drilling.”
Our MPD services can help you mitigate pressure-
related drilling hazards (such as kicks and uid loss),
maximize drilling efciency, and make otherwise
undrillable wells drillable. The technique entails the
use of specialized equipment to control the wellbore
pressure prole more precisely than allowed by
conventional drilling methods.
More than 40 percent of all drilling
hazards relate to wellbore pressure.
MPD presents a highly effective
means to mitigating such hazards.
© 2005-2010 Weatherford. All rights reserved. 3
J a m e s K
.
D o d s o n C
o m p a n y | e m
a i l @
i n f o g u l f .c o m
MPD benets include:
• Effectively mitigates drilling hazards, such as differential sticking,
uid loss, kicks, lost circulation and nuisance gas zones
• Optimizes rate of penetration (ROP) and prolongs bit life, cutting
the number of trips and reducing nonproductive time (NPT) to
enhance drilling efciency
• Reduces the number of casing strings relative to conventional
drilling techniques and in some cases, deepening casing set points
• Minimizes health, safety and environmental (HSE) risks
• Enables the drilling of otherwise undrillable wells
Kick9%
Shallow Water Flow
3%
Lost Circulation
13%
Sloughing Shale
3%
Stuck Pipe11%
Twist Off
3%
Nonpressurerelated events
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4 © 2005-2010 Weatherford. All rights reserved.
Dening MPD
MPD entails the use of an RCD, a choke-manifold system and other equipment to achieve
precise control of a wellbore’s pressure prole while drilling. Common MPD drilling
techniques include detection and management, constant bottomhole pressure (CBHP),
pressurized mud-cap drilling (PMCD), and dual gradient.
Managed pressure drilling:
An adaptive drilling process used to precisely control the annular pressure prole throughout the wellbore.
The objectives are to ascertain the downhole-pressure-environment limits and to manage the annular hydraulic
pressure prole accordingly. It is the intention of MPD to avoid continuous inux of formation uids to the surface.
Any inux incidental to the operation will be safely contained using an appropriate process.
▪ MPD process employs a collection of tools and
techniques which may mitigate the risks and costsassociated with drilling wells that have narrow downhole
environmental limits, by proactively managing the
annular hydraulic pressure prole.
▪ MPD may include control of backpressure, uid density,
uid rheology, annular uid level, circulating friction, and
hole geometry, or combinations thereof.
▪ MPD may allow faster corrective action to deal with
observed pressure variations. The ability to dynamicallycontrol annular pressures facilitates drilling of what might
otherwise be economically unattainable prospects.
International Association of Drilling Contractors (IADC) Underbalanced
Operations and Managed Pressure Drilling Committee
T r i p - t a n k
f i l l u p
Mud gas
separator
Trip
tank
Trip-tank
pump
Shale
shakers
Microflux™ control manifold
Main flowline
Rotating
control device
Gas to vent
Rig choke
manifold
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© 2005-2010 Weatherford. All rights reserved.
Weatherford’s Managed Pressure Drilling (MPD) Services
5
Variant Detection and management
Objective Enhance wellsite safety when drilling with hazardous uids through unknown geopressure zones or in
formations with high concentrations of toxic gases, such as hydrogen sulde (H2S).
How it works Detection and management practices minimize the risk of well-control incidents when drilling with
hazardous uids or in formations with high concentrations of toxic gases—a risk exacerbated by a
narrow, pore-pressure/fracture-gradient window. These techniques incorporate the use of a closed-loop,
mud-return, handling system (as opposed to more conventional open-air systems) on the rig oor to
ensure that all annular uid returns are contained. Its key components include an RCD (positioned above
the blowout preventer), drillstring oats and a dedicated choke.
Variant Constant bottomhole pressure drilling
Objective Eliminate kick/loss cycles when a formation’s fracture gradient approximates its pore pressure—
a common scenario on deep wells.
How it works Achieved with an RCD and an additional control choke, CBHP drilling enables operators to maintain a
precise balance between pore pressure and fracture gradient—even when pumping stops—without the
use of heavier-than-optimal drilling uids. The capability to quickly change equivalent mud weight and
maintain optimal equivalent mud density ends problematic kick/loss cycles.
Variant Pressurized mud-cap drilling
Objective Minimize mud losses and associated NPT when drilling in highly depleted zones or formations
with large voids, such as caverns.
How it works Heavy, viscous mud is pumped down the annulus, where it acts as a cap on the well and keeps uids
from escaping. A second lightweight, ‘sacricial’ drilling uid, such as seawater, is used to continue
drilling. The lighter uid enhances drilling efciency. Also, PMCD techniques trap uid and cuttings
beneath the surface—eliminating the need to dispose of them, preventing dangerous gases from
reaching the wellsite, and, in many cases, helping to stabilize the formation.
Variant Dual-gradient drilling
Objective Reduce the risk of formation damage and related uid losses when drilling in deep formations with
low-fracture gradients, while eliminating the need to change mud density.
How it works Typically, a second light-weight uid (such as nitrogen) is injected into the annulus with a parasite string
or concentric casing (land), or a marine riser (offshore). As the light uid rises, it takes heavy mud with
it, reducing the total weight of the mud in the annular column. Ideally suited for deepwater drilling, this
technique tricks the wellbore into thinking the rig is closer than it is by removing some of the hydrostatic
head pressure that would otherwise result from heavy mud and cuttings in the annulus returns.
In addition to minimizing formation damage, dual-gradient drilling eliminates the need for frequent
mud-density adjustments, a more conventional technique that results in at t ime.
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6 © 2005-2010 Weatherford. All rights reserved.
More technology
Through acquisitions and experience-driven research and development, we have built
the largest MPD product selection in the oileld services industry. With such a breadth of
equipment and built-for-purpose systems, we are positioned to meet your MPD needs in
virtually any drilling conditions, onshore and offshore. Our MPD portfolio includes surface
and subsea RCDs, specialized drilling uids, and a revolutionary Microux™ control system
that enables real-time detection of minute downhole inuxes and losses.
Rotating control devices. Used in mud-
return systems to contain annular uids during
drilling operations, RCDs are key enablers of
MPD techniques. They make underbalanced,
near-balanced or overbalanced drilling possible
when facing an elevated risk of gas kicks. We
offer a broad selection of RCDs, many of which
have been engineered for specic conditions.
For example, we offer the built-for-purpose
SeaShield™ marine series for offshore drilling
environments, and the SafeShield™ land series
for virtually any onshore application.
DDV ® downhole deployment
valve. Our innovative DDV
system—a casing-deployed,
downhole-pressure, isolation
device—removes the need to place a
viscous plug and enables maximumtripping speeds without the risk of
swabbing. This process reduces
tripping times and greatly enhances
safety on MPD operations.
Advanced Microfux control
system. This revolutionary system
represents a major step change in MPD
technology. It enables the real-time
measurement and analysis of ow and
pressure data with an unprecedented
degree of precision, enabling rapid
detection—and consequently
minimization—of kick and uid loss on
MPD operations. The fully automatedsystem is driven by proprietary
algorithms, which enable precise
wellbore pressure prole management.
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© 2005-2010 Weatherford. All rights reserved.
Weatherford’s Managed Pressure Drilling (MPD) Services
7© 2005-2010 Weatherford. All rights reserved.
Weatherford’s Managed Pressure Drilling (MPD) Services
7
Surface separation
equipment. MPD techniquesdo not invite an inux of
hydrocarbons, per se; however,
some operations may require
the use of surface-separation
equipment beyond a rig’s
existing capacity. We can
supply two- and four-phase
systems for both onshore and
offshore operations.
Drilling uids. The success
of an MPD operation is highly
contingent on the use of
appropriate drilling uids, the
applications of which include
maintaining wellbore stability,
minimizing corrosion and
effectively removing cuttings. We
offer a wide selection of drilling
uids and chemicals, as well as
compatible delivery systems.
Our portfolio includes specialized
uids suited for MPD operations in
a range of drilling environments.
Gateway™ wireline-
retrievable, nonreturn
valve. Our apper-style,
drill-oat valve is designed
to manage backpressure
in the drillstring on MPD
operations. Unlike a xed-
oat valve, the Gateway
valve can be changed out
or removed on wireline,
eliminating the need to
trip pipe, thus enhancing
operational efciency
and safety.
Nitrogen-generation and
compression equipment. We offer a wide selection of nitrogen-generation
and compression equipment, used on
MPD operations to lighten drilling mud
and annular uids.
Removing nitrogen
from air
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8 © 2005-2010 Weatherford. All rights reserved.
More expertise
We draw on decades of experience, extensive internal training and our
breadth of capabilities to provide you with the value-added expertise so
critical to the success of your MPD operations.
Planning for success
We use a basic, three-step process to develop and implement
MPD strategies that fulll client objectives:
Evaluate. Drawing on multiple resources, including our SURE™well candidate selection software, we develop a thorough
understanding of your reservoir and your objectives.
Engineer. Using data we obtained during the evaluation phase,
we work with you to develop a comprehensive strategy, which
includes the MPD techniques and equipment to be used. This
up-front planning is critical to the success of your MPD operation.
Execute. We provide wellsite support throughout your MPD
operation. We can also leverage our vast network of subject
matter experts in other disciplines, as needed.
1968
Added rotating control
device—a key MPD
enabler—to product portfolio
Weatherford MPD Milestones
1998
Began expanding selection
of MPD equipment through
acquisition and internal
development and providingMPD support services
1999
Developed DDV® downhole
deployment valve
2000
Launched a QHSE
management system
designed explicitly for MPD
and related services
2003
Launched SURE well
candidate selection software
and process, used to assess
reservoir suitability for MPDand related services
One element of the evaluation phase may include our SURE™ well candidate selection
process. This proprietary software package helps quantify the benets of using MPD
techniques on a given well. The comprehensive application can also be used to evaluatethe merits of similar drilling methods, such as underbalanced and air drilling.
00
2000
4000
6000
8000
10000
12000
14000
16000
18000
20000
22000
24000
26000
20 40 60 80 100 120 140
Conventional
MPD
ConventionalCumulative Days:143.938 to 27000 ft
MPD Cumulative Days:117.550 to 27000 ft
Offshore Deep-Gas Project
Days vs. Depth
Cost Distribution
25
Mean = 38M USD Mean = 47M USD
30 35 40 45 50
MPD
Cost
OBD
Cost
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© 2005-2010 Weatherford. All rights reserved.
Weatherford’s Managed Pressure Drilling (MPD) Services
9
2004
Applied MPD techniques
in marine environment for
rst time
2007
Debuted revolutionary
Microux™ control technology,
which enables real-time
identication of minutedownhole inuxes and losses
2008
Deployed marine-series
RCD for rst time
2009
Employed marine-series
RCDs on oating rig for
rst time
2010
Received industry’s rst
API 16RCD certication
for RCDs
Building a knowledge base
With years of MPD experience, we bring valuable lessons from
previous jobs to each new operation. A robust performance
tracking system helps us identify best practices. Our eld ex-
perience has heavily inuenced our MPD product-development
focus on built-for-purpose systems.
Combining depth and breadth
Weatherford combines depth of MPD expertise with a breadth
of capabilities that spans the life cycle of a well—drilling, evalu-ation, completion, production and intervention. Positioned to
provide holistic solutions to your operational challenges, we
routinely engage subject matter experts in a range of comple-
mentary disciplines on MPD operations.
Cultivating expertise through training
We provide our MPD specialists with extensive training to
complement their eld experience and to ensure that they are
well versed on our products and services, as well as the latest
MPD and drilling hazard mitigation techniques. We also use a
competence assurance program to evaluate the skills of our MPD specialists on a routine basis. Our global network of train-
ing facilities includes dedicated MPD training centers that are
equipped to simulate eld environments.
Enabling third-party operators and rig contractors
As a major oileld services provider, we have adopted a highly
collaborative approach to doing business. In line with that
philosophy, we offer specialized MPD training to third-party
operators and rig contractors. We can provide the training—
which covers MPD techniques, as well as proper use of our
equipment—at client sites or at one of our facilities.
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10 © 2005-2010 Weatherford. All rights reserved.
Offshore India: CBHP
drilling helps reduce
NPT in HP/HT Well
NPT related to downhole
problems was reduced to
one day, compared to an
average of 10 days for each
of three previous wells in the
eld. In addition, uid losses
were minimized to 290 bbl
of synthetic oil-based mud,
compared to previous losses
of up to 4,000 bbl.
Egypt: Our advanced
Microux™ control
technology enables
drilling of previously
undrillable well
The combined use of our
advanced Microfux control
system and an operator’s
near-balanced drilling system
ended detrimental kick/loss
cycles to enable the drilling of
an exploratory HP/HT well to
TD. Eight previous attempts to
drill the well had failed.
Peru: MPD techniques
mitigate circulation
losses, reduce drilling
costs on remote wells
The section was drilled
in seven days—two days
faster than planned—saving
the operator more than
US$400,000 per well. The use
of a two-phased drilling system
helped maintain strict control of
bottomhole pressure, thereby
minimizing uid losses and the
risk of hole instability.
Mexico: MPD techniques
enable operator to reach
TD, reduce uid losses
Our MPD techniques enabled
an operator to overcome well-
control issues experienced
in previous operations—gas
inux, stuck pipe, uid
losses—and consequently
to reach TD safely on an
onshore, horizontal well.
MPD also made drilling near
the pore pressure possible,
minimizing formation damage.
More real results
Since 1998, we have provided MPD support on operations
in countries throughout the world. Examples of our
Real Results showcase our success.
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Weatherford’s Managed Pressure Drilling (MPD) Services
© 2005-2010 Weatherford. All rights reserved. 11
Indonesia: PMCD and
DDV ® tool enable drilling
of big-bore gas wells
Our PMCD-variant MPD and
DDV tool enabled an operator
to drill 300 MMscf/d. Use
of the DDV tool eliminated
the need for killing the well
before setting the completion
string. Use of a PMCD
system reduced consumption
of lost-circulation material.
These measures contributed
signicantly to minimizing
formation damage and
preserving reservoir potential.
Vietnam: CBHP drilling
enables drilling of record-
setting well
We used CBHP drilling to
mitigate severe-brine-drilling,
uid losses on a development
well in a pressurized, fractured-
basement reservoir where
losses and kicks are common.
At a depth of 21,411 ft
(6,526 m), the resulting well
was the country’s longest
basement well to date.
Secure DrillingSM
services:
A better way to drill
MPD is part of an expanded range of Secure Drilling
services that we offer to minimize the risk of drilling
hazards related to a wellbore’s pressure prole, and
ultimately, to optimize life-of-well performance. Our
Secure Drilling services encompass:
Personnel and asset protection. The use of RCDs
to protect wellsite personnel and rig equipment is a
cornerstone of our Secure Drilling methodology.
Detection and management. We use advanced
identication and control systems to rapidly detect
kick and uid loss, and manage the wellbore
pressure prole during drilling operations.
Reservoir evaluation. We draw on our extensive
evaluation capabilities to obtain pertinent reservoir
data—such as pore pressure, fracture gradient,
hydrocarbon composition—that drive drilling and
completion decisions.
Performance optimization. Leveraging reservoir
data and other resources, we design and implement
strategies to optimize life-of-well performance.
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weatherford.com
Weatherford products and services are subject to the Company’s standard terms and conditions, available on request or at weatherford.com. For more information contact an authorized Weatherford representative. Unless notedotherwise, trademarks and service marks herein are the property of Weatherford. Specications are subject to change without notice. Weatherford sells its products and services in accordance with the terms and conditions setforth in the applicable contract between Weatherford and the client.
© 2005-2010 Weatherford. All rights reserved. 3246.04
Weatherford’s Managed Pressure Drilling (MPD) Services
Weatherford’s MPD services are an integral component of our drilling hazard mitigation (DHM)
portfolio. To learn more about our phased approach to DHM— explore, engineer, execute—or
how our MPD services can help you maximize control of your wellbore’s pressure prole,
mitigate multiple drilling hazards and ultimately make otherwise undrillable prospects drillable,
contact an authorized Weatherford representative or visit weatherford.com/MPD.