Technical Data S ummary
4¾-in. AutoTrak G3 RCLS
Building on the success of the most
technologically advanced Rotary Closed Loop
System (RCLS), the AutoTrak™ G3 RCLS
encompasses the latest levels of MWD / LWD
development in a rugged modular design. This
third generation system opens new
opportunities in all aspects of directional
drilling, including both geosteering and
extended reach applications. The tool can
automatically steer itself during continuous
rotation of the drill string with changes to the
well trajectory communicated to the tool from
surface while drilling ahead.
Truly integrated Drilling and Evaluation BHA
design concept, which enable placement of
LWD and other sensors close to the drill bit,
making the system ideal for geosteering
applications. The advanced inclination HOLD
mode brings extreme precision when drilling
long tangents, even at low inclinations.
Near to Bit Directional, Rotational Azimuthal
Gamma Ray, Multiple Propagation Resistivity,
real time pressure and vibration
measurements are included in the AutoTrak
G3 RCLS System.
The AutoTrak™ G3 RCLS is always engaged,
not on/off duty cycles, but a constant,
continuous and consistent control with more
than 7,000 different steering vectors available.
This advanced drilling system continuously
adjust the force to meet the target with the
smoothest possible wellpath, even under the
most challenging condition, delivering a
superior hole quality.
The AutoTrak™ G3 RCLS system steers with
pressurized pads using hydraulic pumps. No
minimum pressure differential limitations,
optimize bit hydraulics to improve drilling
performance.
Features
Benefits
Continuous drill string rotation from surface
and adjustment of steering targets while
drilling ahead.
Maximum drilling performance with minimum
risk and non-productive time.
Precise closed loop steering with continuous,
smooth adjustment of steer direction and
advanced inclination hold mode.
Straight, in-gauge tangents and precise
curves with excellent hole quality for troublefree completions and improved ROP.
Steering pads decoupled from fast rotation in
short, slowly rotating sleeve.
Consistent steering in all environments,
including soft formations and overgauged
hole. Full capability of open-hole sidetracks.
Steering independent of bit pressure regime.
Optimized bit performance and ECD
management.
Pads fully retract into tool body on command
or power-down, allowing full rotation of all
parts.
Minimized sticking risk and no restrictions in
reaming and tripping operations.
4¾-in. AutoTrak G3 RCLS
©2013-2014 Baker Hughes Incorporated. All rights reserved.
ATK3.0-70-01-002 Rev. B
Technical Data S ummary
4¾-in. AutoTrak G3 RCLS
General Tool Specifications
Borehole Size
Build Rate
Total Length
Steering Unit Module—GT
MWD / LWD Module
Power and Comm Module + Stop Sub
Stabilizer Module
Primary Power Source
Connections uP / down
Operating Specifications and Limits
US Units
SI Units
5¾ in. to 6¾ in.
146 mm to 171 mm
0—10°/100 ft
0—10°/30 m
Length Weight Length Weight
ft
lb
m
kg
50.87
3,009
15.50
1,366
9.97
586
3.05
266
20.20
1,212
6.20
550
14.10
771
4.30
350
2.30
220
1.00
100
Drilling fluid driven turbine
NC38 Box / 3½-in. API Reg. Box
US Units
SI Units
Flow Rate
125 (148)–187 gpm 475 (560)–708 lpm
Low flow: LF BCPM and LF ASU
Normal flow: NF BCPM and LF ASU
161 (190)–220 gpm 611 (719)–833 lpm
200 (190)–250 gpm 757 (719)–946 lpm
Normal flow: NF BCPM and HF ASU
200 (255)–350 gpm 757 (965)–1.325 lpm
High flow: HF BCPM and HF ASU
() – min. flow rate for downlink operation
Maximum drilling WOB
15,000 lb
67 kN
Maximum WOB to failure
22,500 lb
100 kN
Maximum tool rotation
400 rpm
RPM specification may be reduced depending on circulating temperature, mud
properties and well bore geometry. Please contact Baker Hughes representative for
specific applications.
Maximum drilling torque (at the Bit)
8,500 ft-lb
12 kNm
Maximum torque to failure (at the Bit)
20,300 ft-lb
27.5 kNm
Maximum overpull (Continued Operation)
224,808 lb
1,000 kN
Maximum overpull to failure
472,000 lb
100 kN
Maximum operating temperature
302°F
150°C
Minimum operating temperature
-4°F
-20°C
No deck test or tool programming below -4°F (-20°C).
Upgrade for higher temperatures available.
Maximum hydrostatic pressure
20,000 psi
1,380 bar
25,000 psi (1,725 bar) tools available on request.
Maximum bit pressure drop
No limitation
1% max. volume, acc. to API 13B
Sand content
(<0.5% recommended)
40 ppb = 114 kg/m³ (Any pumping of LCM
Maximum LCM
must be carried out according to AutoTrak G3
operations manual)
Max DLS for tool passage for AutoTrak
with rotation
10°/100 ft
10°/30 m
without rotation
30°/100 ft
30°/30 m
Max DLS for tool passage should only be used as a guide. Actual limits may vary
depending on BHA configuration. Please contact Baker Hughes representative for
specific applications.
±50% Maximum deviation from mean rpm
(e.g. 100 rpm: rpm range=50-150), limited
Maximum rpm variation
by max tool rotation specification, (from
recorded memory or as flagged by
corresponding real-time severity level)
Refer to Supplemental Technical
Maximum axial and lateral vibration
Specification document
TDS-20-60-0000-00
Sensor Specifications
US Units
MPR™
2 MHz Propagation Resistivity
Phase Difference (Long Spaced)
Range
0.1–3,000 ohm-m
±1% (0.1–50 ohm-m)
±0.5 mmho/m (>50 ohm-m)
Accuracy
Attenuation
Range
0.1–500 ohm-m
±2% (0.1–25 ohm-m)
±1 mmho/m (>25 ohm-m)
8 in. (20 cm) for 90% response in
conductive beds
Accuracy
Vertical Resolution
Rotational Azimuthal Gamma Ray
Sensor Type
Measurement
Range
Scintillation (x2)
API GR
0–500 API
±2.5 API@100 API and
ROP = 60 ft/hr (18.3 m/hr)
6 in.
15.3 cm
Accuracy
Vertical resolution
Directional
Sensor type
MTF/GTF switching
Measurement
Inclination
Azimith2,3
Toolface
Magnetic2 TF
Gravity3 TF
Total Magnetic Field
Dip Angle2
Near Bit Inclination
Sensor type
Measurement
SI Units
Range
0°–180°
0°–360°
Tri-axial Accelerometer/Tri-axial Flux Gate
Operator selectable (default: 3°)
Resolution
Accuracy1
0.09°
±0.1°
0.35°
±1.0°
0°–360°
0°–360°
0–100,000 nT
-90°–90°
1.4°
1.4°
35
0.04°
±1.5°
±1.5°
±100
±0.2°
Single-axial Accelerometer
Resolution
Accuracy
±0.1° (without Rotation)*
Inclination
0°–180°
0.09°
±0.3 (with Rotation)*
* above 5° Inclination
Pressure (Annular, Bore and Flow Off Pressure)
Range
0–25,000 psi
Accuracy / Resolution
± 0.25 % of full scale / 5 psi
Vibration
Sensor
axial vibration
One Accelerometer, z direction
Type
lateral vibration
Two Accelerometers, x-y direction
Acceleration range
0–15 g
Frequency range
0–82 Hz
Lateral and Axial vibration; transmitted as
Real time log options
severity level (scaled to g-RMS)
Average and max. lateral and axial
Post Run / Memory log options
vibration in g-RMS and as severity level
Rotation and Stick-Slip
Sensor type
Two axis magnetometer
Rotation speed
0–±1,000 rpm (±1% Accuracy)
Downhole rpm, stick-slip transmitted as
Real time log options
severity level
Min., max., and Average rpm, stick-slip
Post Run / Memory log options
and backward rotation severity
Range
All Sensor accuracies are 2 Sigma confidence
For a typical magnetic field value at 30° latitude
3 Accuracy applies to inclinations greater than 5.0°
1
2
Drilling & Evaluation
2001 Rankin Road
Houston, Texas 77073
Phone: +1 713-625-4200
www.bakerhughes.com
Although the information contained herein is believed to be accurate, no other representations are made concerning the information. Under no circumstances shall Baker Hughes be liable for any incorrect or incomplete
information. All technical specifications and commercial information concerning the product and/or services described herein may be changed at any time without further notice. Refer to Supplemental Technical Specifications
(TDS-20-60-0000-00) for further environmental specific specifications and information on the application, operation, and handling of Baker Hughes tools. Technical Data Summaries are controlled documents and can only be
released through the BHOS – Global Ops/AMO Documentation) Group.
ATK3.0-70-01-002