Reliable data transmission in all drilling environments

AccuWave®

Electromagnetic MWD System

An operator drilling the Wolfcamp in Crockett County needed an MWD solution to run in high LCM environments. The AccuWave® EM MWD system was chosen due to its unlimited LCM tolerance. As an added bonus, AccuWave® System transmits survey data during connections, eliminating all time associated with mud pulse surveys and allowing for tagging bottom as soon as the pumps are turned on. Additionally, continuous inclination eliminated check shot surveys in the lateral. The breakdown of time savings can be seen in the table to the right.

ACCUWAVE® ELECTROMAGNETIC MWD SYSTEM

AccuWave™ is a state of the art collar mounted Electromagnetic MWD system utlizes the latest technology and design techniques.

ACCUWAVE® SYSTEM FEATURES

• Utilizes the latest technology to reduce circuit board count and eliminate connectors

• Singlecollarmounteddesigneliminatesrig site assembly. Tools arrive ready for operation supporting manned or unmanned operations

• Compressionmountedinsidecollartobetter handle shock and vibration

• Proprietary electronics mounting collar to mitigate shock and vibration

• Capableofoperatingat175°C(347°F)temperaturesat100G’sshock/vibration levels

ACCUWAVE® MEASUREMENTS

• DirectionalMeasurements- StandardSurvey- 6AxisVectorSurvey- GravityandMagnetictoolface

• ShockandVibration- AxialandLateral–Peak,RMS,

Average

• ContinuousInclination

• APIGammaray

• Allmeasurementsstoredinmemoryathigh resolution.

UNLIMITED LCM CAPABILITIES

Because the AccuWave® system has no mechanical moving parts to become pluggedorpackedoff,ithasnolimitontheamount or type of lost circulation material (LCM),makingitanidealsolutionforareaswhere lost circulation is an issue.

SMART TELEMETRY

AccuWave® incorporates a telemetry switching scheme to maximize bandwidth use during rotating and sliding operation. This eliminates toolfaces while rotating when they are not needed to maximize log quality withoutsacrificingsteerabilitywhilesliding.

Nabors’ AccuWave® Electromagnetic Measurement While Drilling (MWD) system is the premier solution for reliable data transmission in all drilling environments.

CASE STUDY

EM FEATURES

• Nomovingparts

• Operatesinalldrillingenvironments

• UnlimitedLCMtolerance

• Transmitssurveyduringconnections

• Advancedproprietarydecoder

RIGLINE 24/7

• RemotedirectionaldrillingandMWDoperations:-Infrastructurecapabletoperform

multiple directional & MWD jobs- DD, MWD and drillers trained on

remote directional drilling

• SupportingNDSoperationswith-QA/QCofsensordataandreports

to ensure consistent and reliable reporting

-24/7supportfortroubleshooting-Standardescalationprocessto

includeSMEs,engineersetc.tosupportfieldstaff

-Asrequired,technicians/supportstaffdispatched to ensure fast response

Time savings of using AccuWave® EM System

Survey Time 9.4hours

No Check Shots 1hour

BHA Makeup 1hour

Total Time Savings 11.4hours

AccuWave® System transmits during connections, eliminating all time associated with surveys.

PUMPSOFF(10-20sec.)

PUMPSOFF(10-20sec.)

8-9 minutes

3-4minutes

MUD PULSE

EM

PUMPSON(50sec.)

PUMPSON(10-20sec.)

RECEIVESURVEY(4min.)

RECEIVESURVEY(1-2min.)

CALCULATESLIDE(1-2min.)

CALCULATESLIDE(1-2min.)

DRILLAHEAD

DRILLAHEAD

SETSLIPS(10-20sec.)

SETSLIPS(10-20sec.)

MAKECONNECTION(1-2min.)

MAKECONNECTION(1-2min.)

AccuWave® EM MWD System Specifications

Data Resolution

Inclination±0.1°(Range:0-180°)

Azimuth±0.5°(Range:0-360°)

Toolface±0.1°(Range:0-360°)

ContinuousInclination ±2º(0º-5º) ±1º(5º-8º) ±.5º(8º-13º) ±.1º(greaterthan13º)

Gammaray±2%(Range:0°C-150°C); ±5%(150°C-175°C)

Signal Transmission Electromagnetic(EM)

Collar OD 4.75in.OD 6.5in.OD 8in.OD

Collar Length 25ft.

Flow Ranges

4.75in.:0-325gpm

6.5in.:0-800gpm

8in.:0-1200gpm

Sand Content <1%byvolume

LCM Tolerance Nolimit

Battery Life 250-500hours(formationdependent)

Operating Temperature 175°C(347°F)

Maximum Pressure 20,000psi

Maximum Vibration, g 20(rms,random,15-1,000Hz)

Max. Shock, g 500

Dog Leg Capability MaxDoglegRotating@30RPM MaxDoglegSliding

Collar Size 43/4 61/2 8 43/4 61/2 8

Stabilized BHA 12º/100ft 10º/100ft 5º/100ft 17º/100ft 15º/100ft 8º/100ft

Slick BHA 15º/100ft 13º/100ft 7º/100ft 20º/100ft 18º/100ft 10º/100ft

Slick with Flex NMDC BHA 17º/100ft 15º/100ft 8º/100ft 22º/100ft 20º/100ft 11º/100ft

EM ANTENNA

SHOCK AND VIBRATION

CONTINUOUS INCLINATION

DIRECTIONAL SENSOR

Why choose Nabors’ AccuWave® System over the competition?

Enhance your operations

Nabors offers an integrated suite of performance products and services that work with the AccuWave® System, including ROCKit®, PILOT™ and REVit™ to maximize efficiency.

Unlimited LCM tolerance

No moving parts eliminates most common failure mode

Survey transmitted on flow off eliminating all survey related NPT

Proven design for high shock and vibration conditions

175°C temperature capability

Reduce tortuosity and eliminate check shot surveys with Continuous Inclination

Smart Telemetry optimizes data throughput for high log quality and maximum steerablility

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