Halliburton offers the industry’s most

comprehensive suite of pressure optimization

solutions

As a proven technique to enhance well construction, managedpressure drilling (MPD) provides a means to precisely control theannular pressure profile throughout the wellbore. With traditionaloverbalanced drilling techniques, bottomhole pressure is managedby manipulating mud weights and pump flow rates. With an MPDsystem however, the pressure can be changed more rapidly bycontrolling the surface (back) pressure. To control the pressure inthe wellbore, the GeoBalance® system controls the wellheadpressure, which corresponds to the desired bottomhole pressurewith the use of wellbore hydraulics models. These models arecalibrated with PWD (pressure while drilling) data in real timewith the GeoBalance system's proprietary algorithm, XFactor. TheGeoBalance real-time hydraulics models were built from Baroid’sDFGTM hydraulics modeling software application, the mostaccurate hydraulics modeling software available to the industry.This tool can allow the user to simulate proposed drillingconditions, allowing optimization of not only the fluid propertiesbut also the drilling parameters. Accurate modeling allows theuser to look ahead of the bit, avoid future problems and reduceNPT (non-productive time).

Output from drilling simulations focuses on annular cuttingsconcentrations, including average cuttings concentration as wellas localized cuttings distribution in the annulus, and equivalentcirculating density (ECD). Documented variance between DFGsoftware-predicted and actual ECD, as measured by PWD tools, isconsistently less than 1%. The DFG software is the only hydraulicsmodeling program that accurately accounts for effects of drillingfluid compressibility and thermal expansion on fluid density. Thesoftware also accounts for the reduction in temperature while themud returns to surface through a long deepwater riser, whichcauses an increase in density, viscosity and rheological properties.DFG software modeling is critical to operations where verynarrow margins between pore pressure (PP) and fracture gradient(FG) exist.

Alternatively, clients may wish to use their preferred hydraulicsapplication and can utilize their results to calculate well head

GeoBalance® Managed Pressure Drilling Services Comprehensive equipment options for optimized pressure drilling solutions

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The GeoBalance® Optimized Service combines automatic choke, backpressure pump, metering and an advanced automated control systemrun in conjunction with a field-proven hydraulics model toaccurately maintain bottomhole pressure within a narrowoperational window.

pressures. Any third party hydraulics application must supportany of the following: WITS (Wellsite Information TransferSpecification) level 0 through 2B, WITSML (Wellsite InformationTransfer Standard Markup Language) 1 through 1.3, or be OPCcompliant.

Halliburton offers the industry’s most comprehensive suite ofequipment for precise pressure control during drilling. Combiningspecific configurations of automated choke control, flow diverters,and make-up pump with additional tools that help ensuremaximum pressure control for the job at hand, each GeoBalanceMPD system is customized to provide the right pressureoptimization solution.

GeoBalance MPD service levels mean customized

solution options

Different levels of well construction complexity require differentsolutions. With a comprehensive line of equipment and integratedsoftware capabilities, Halliburton’s GeoBalance MPD service canbe tailored to the challenge level of each project:

• When bottomhole pressure control requirements are lessstringent, the GeoBalance Self-Managed service utilizes thecompact RCD 1000™ or RCD 5000™ Rotating Control Devicealone or in combination with the dual hydraulic adjustablechoke manifold to direct and control fluid flow.

OPTIMIZED PRESSURE DRILLING

OPTIMIZED PRESSURE DRILLING

• For areas where bottomhole pressure must be controlled withina tight pressure window, the GeoBalance Automated serviceprovides safe, remote software-controlled choke operationusing the Sentry™ surface monitoring system, real-timehydraulics models and an automated choke.

• The GeoBalance Optimized service adds the comprehensivecapabilities and expertise of Sperry Drilling services' ADT®(Applied Drilling Technology) optimization service, usingpowerful computer simulators to model, measure and optimizethe entire MPD process. Real-time geomechanical properties(pore, fracture and collapse pressures) are determined andintegrated into the automatic choke manifold control software.

• For a multi-phase system solution, the GeoBalance® Sigma®service provides a full line of surface separation and injectionequipment to allow drilling in extremely low pressure zones.Multi-phase hydraulics modeling, project management andengineering are part of this service.

Model, Measure, Optimize

Incorporating Halliburton’s philosophy to “model, measure andoptimize,” the GeoBalance service brings together the rightcombination of technologies to provide the best solution for yourmanaged pressure drilling application. All equipment is sourcedin-house from Halliburton and is certified for specificgeographical requirements, to help ensure quality and availability,as well as design code compliance for worldwide operations.

Rotating Control Device

Sperry provides both low- and high-pressure rotating controldevices. The RCD 1000 and 5000 rotating control devices form apositive seal on the rotating kelly or drillstring, allowing you

to safely divert flow from the annulus away from the rig floorduring managed pressure or underbalanced drilling applications.It can also be used during conventional drilling for gas kickcontrol. The RCD 5000 device complements the rig's traditionalblowout preventer (BOP) stack.

The RCD 5000 device is supplied with flange sizes toaccommodate a range of BOP sizes. The bearing assemblies aredesigned for quick and easy repair or replacement with asnubbing adaptor for snubbing operations. The housing assemblyof the RCD 5000 device is designed with a large-diameter bore toaccept large drill bits and bottomhole assembly components.

The RCD 5000 device with manual or automated choke controlmay be used alone for Self-Managed service, or with theAutomated MPD service.

Choke Manifold Skid Configurations

The MPD Automated service allows precise control of thebottomhole pressure by regulating the wellhead pressure.Available in several configurations, all GeoBalance MPD servicechoke skids incorporate dual redundant chokes with availabilityof 1-½-, 2- and 3-inch trims and a bypass line. An integratedhydraulic/pneumatic control panel allows for redundant controlof the system via manual or remote system control using SperrySentry software. Additional metering for surface flow and pressuremonitoring helps ensure that the system is in the optimizedcontrol range. These readings are also incorporated into Sperry’sDetectEV™ software for event detection. All sensor readings arefed into the Programmable Logic Controller (PLC) on the skid,allowing control in case of a disconnect from the software controlsystem. Within the Sentry data acquisition software, a datavalidation application validates all acquired data, especiallyvariables used for control. The GeoBalance system uses InSite®software as its database and graphical interface, and all dataavailable at the field location can be brought into one centraldepository for data management.H

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GeoBalance® Choke Manifold Skid

OPTIMIZED PRESSURE DRILLING

Working PressureServiceChokes

Valves Gut (by pass)Choke Wings

Crossovers InletOutlet

Operating TemperaturesMinimum Ambient TemperatureMaximum Fluid TemperatureDesign Codes

Skid LengthSkid WidthSkid HeightSkid WeightPLC

Pressure sensorsTemperature sensorsPosition indicators on all valves

GeoBalance Automated System Choke Specifications

5,000 psi / 345 bar

MPD / UBD w/ H2S

2 Tungsten Carbide High Wear Drilling Chokes c/w Control PanelHydraulic Automatically AdjustableDressed with 1-½-, 2- or 3-in. trims

Qty 2 EEC, HPHT 5-1/8-in. bore 5KQty 8 EEC, HPHT 4-1/16-in. bore 5K (2 upstream of chokes hydraulically actuated)

6–in. GR52 Techlok6-in. GR52 Techlok

-20° F / -29° C

350° F / 176° C

ATEX, DNV 2.7-1, NORSOK, API 16C, NACE MR-01-75, API 6A, ASME B31.3. PSLLevel 3, Material Class EE. Skid CE marked according to ATEX, EMC and Machinedirective.

16 ft / 4.95 m

9.5 ft / 2.9 m

9.3 ft 2.8 m

37,500 lb / 17,000 kg

Type Siemens S7-300Power 220 V, 60Hz, 15AmpsEthernet Comms to Control SystemControlled Automatically using Advanced Transient Hydraulics Model andOPC/Sentry/HMI Software, or Manually at Unit Control Panel.

Rosemount 3051, 4-20 mA

Rosemount 644, 4-20 mA

Proximity Sensors

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flow across the chokes when the rig pump is stopped duringconnections or trips. The BPP is controlled either automaticallyvia the Autochoke Control system through the PLC and HumanMachine Interface (HMI), or with a manual start. For variablespeed pumps, control of the back pressure pump can beconfigured such that the rate change follows a predefined ramp,both for starting and stopping the pump. For soft-start pumps, thepump will circulate upon itself at a given rate and an additionalchoke controls the flow and pressure across the wellhead. Whenthe pumps are off for trips or connections, flow across the chokemust be maintained to keep the chokes within the controllablearea of the trims. Alternatively, the GeoBalance service hasdeveloped a method using a rig pump for maintaining pressureduring trips and connections.

GeoBalance® Back Pressure Pump

Back Pressure Pump (BPP) Options

Typically, continuous choke flow is provided with a dedicatedoffline pump during trips and connections. The GeoBalance BackPressure Pump (BPP) is used to ensure minimal bottomholepressure fluctuations during Automated service MPD operations,maintaining accurate back pressure on the annulus by continuing

OPTIMIZED PRESSURE DRILLING

HT-150 GeoBalance Back Pressure Pump (Soft Start)

Maximum Working PressureConnections Inlet

OutletOperating TemperaturePump

Motor Control Centre

Design CodesSkid LengthSkid WidthSkid HeightSkid WeightCoriolis Flow meter

2,150 psi output @ 128 gpm or roughly 1,150 psi output @ 225 gpm with 4-in. plungers

4-in. Figure 206 hammer union (thread) inlet2-in. Figure 1502 hammer union (Wing) discharge

HT-150 ; 3-in. plungers; 5:1 speed reducer200 HP 1,800 rpm/ 480 V / 60 Hz XP motor, (150 hp/1,500 rpm/380V/50Hz) (inverter duty rated)10 hp centrifugal charge pump20 gallon lube oil reservoir2-1/16-in. 5K gate valves (2) (discharge and bypass to suction)2-in. 2,500 psi check valve (discharge)2-in. 2,500 psi pulsation dampener (3 liter volume)4-in. 150 psi RF ball valve (suction)4-in. 150 psi strainer (suction)1.5-in. x 2-in. 5,000 psi relief (to suction)20,000 btu/hr lube oil cooler (sized @ 131 ambient)

Soft start

PLC monitor and safety shutdowns (low lube oil pressure, low plunger lube pressure, oil temperature, motorwinding temperature)

Skid lightingRun/status lightsProfibus communicationEthernet programming port

NACE, ASME B31.3 (c/w 1/16 corrosion allowance) c/w 100% Radiography

Electrical classification NEC Class1, Div 1

236-in.

88-in.

89-in.

20,000 lbs

Micro-motion

Maximum Working PressureCapacity, LiquidsConnections Inlet

OutletOperating TemperaturePump Motor Control Centre

Design Codes

Skid LengthSkid WidthSkid HeightSkid WeightCoriolis Flow meter

CAMAT VSP GeoBalance Back Pressure Pump

725 psi / 50 bar Discharge Side

950 l/min at 50 bar discharge pressure

4-in. 150 psi API Flange

3-in. GR27 Techlok

-29° to 80° C (20° to 180° F)

Kamat triplex (3-cylinder), horizontal, positive displacement and c/w planetary gear reduction drive

Remote/automatic control via HMI and c/w local manual override station. C/w variable frequency drive andshutdown provisions. Comms with control system via Profibus (PCDA). ATEX Zone 1 certified.

API 6A, ASME B31.3, NACE MR 0175, ATEX, DNV 2.7-1, NORSOK, Skid CE marked according to ATEX, EMC andMachine directive.

11.8 ft / 3.6 m

7.5 ft / 2.3 m

9.3 ft / 2.8 m

17,600 lb / 8,000 kg

Endress & Hauser 4-in. Coriolis meterProfibus DPOutputs Flow rateOutputs Mass rateOutputs DensityOutputs Temperature

OPTIMIZED PRESSURE DRILLING

Working PressureServiceOperating Flow Rate Range

Connections, Inlet and OutletRelief

Operating TemperaturesMinimum Ambient TemperatureMaximum Fluid TemperatureCoriolis Flow meter

Design Codes

Skid LengthSkid WidthSkid HeightSkid Weight

GeoBalance Flow Metering Skid

870 psi / 60 bar

MPD w/ H2S

0 to 3,500 l/min 0 to 925 gallons/min

6-in. GR52 Techlok

PSV upstream of meter to allow for meter plugging

-20° F / -29° C

250° F / 120° C

Endress & Hauser 6-in. CoriolismeterProfibus DPOutputs flow rateOutputs mass rateOutputs densityOutputs temperaturePED and SIL-2 compliant

API 6A, ASME B31.3, NACE MR0175, ATEX, DNV 2.7-1, NORSOK,Skid CE marked according to ATEX,EMC and Machine directive. PSLLevel 3, Material Class EE.

7.2 ft / 2.2 m

5.6 ft / 1.7 m

10.8 ft / 3.3 m

12,100 lb / 5,500 kg

Flow Metering

The GeoBalance service has the capability of performing multi-point flow measurement at inlet and discharge points with variousmeters. Typically the autochoke unit uses a single phase Coriolismeter which measures total fluid flow rate, temperature anddensity of the well returns. This meter can be incorporated intothe MPD choke skid, or located off-skid as a stand-alone unit forsome applications.

The meter measures fluid temperature and density, so density ofthe drilling mud can be closely monitored, which has a significanteffect on circulating BHP during MPD.

Fluid flow rate out data is correlated to injected drilling mud rate fromthe rig pumps and BPP. Data recorded by the meter is fed to theAutochoke PLC via Profibus and used in the event-detection software.

A bypass line on the meter skid allows full fluid flow bypass,enabling the meter to be isolated with gate valves formaintenance. In addition, the skid can have an upstream pressuresafety valve (PSV) relief valve that will relieve to a dedicatedatmospheric PSV tank.

Ancillary Equipment for Optimized

Pressure Control

Every GeoBalance system can be customized with the specifictools needed for optimizing pressure control in a well. A systemcan include an enviro-tray, pressure safety valve and high closingratio (HCR) valve, which is hydraulically actuated and positionedupstream of the choke to go to the secondary flow line and alsoused as isolation devices on the primary line between thewellhead and the MPD autochoke system. These are typicallyrated to 10,000 psi.

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GeoBalance® Flow Metering Skid

OPTIMIZED PRESSURE DRILLING

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