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Technical Data S ummary
4-3/4" TesTrak
The Baker Huhges TesTrak™ tool delivers
real-time formation pressure and mobility data
for enhanced drilling efficiency, improved
wellsite safety, and increased reservoir
knowledge. The combination of SmartPad™
closed-loop sealing system and SmarTest™
intelligent testing ensures reliable formation
pressure and mobility for better real-time
decisions.
Since its introduction in 2003, the TesTrak tool
has successfully conducted pressure
measurements in formations with mobility
ranging from 0.01 mD/cP to over 20,000
mD/cP. Tests can be conducted in vertical,
deviated, and horizontal wells in well covering
a hole size from 5-3/4" - 17-1/2". Once started,
an intelligent close-loop system inside the tool
applies an automatic, self-learning
measurement cycle. The system is based on
precise, interacting control of pump draw
down pressure, pad contact pressure and
drawdown volume, enabling the tool to
optimize test and operating parameters.
Once a pad contact has been established with
the borehole wall, the SmartPad system
determines an initial optimal sealing pressure,
which is then continuously monitored and
improved during the entire measurement. If
required the SmartPad sealing system
responds to parameter changes, such as
sanding, or borehole wall irregularities, and
applies the necessary force to obtain a tight
seal without damaging the formation. The
SmarTest intelligent testing system calculates
test parameters down hole using proprietary
Formation Rate Analysis (FRA™) algorithms,
which relates the formation's fluid flow to that
measured drawdown rate in the tool. In high
mobility formation's this can lead to a
measurement in less than a minute.
Features
Benefits
SmarTest, Self-learing, self-adjusting
intelligent system
Optimized parameters reduce BHA stationary
time and ensure valid data
SmarTest, Mobility calculated in real-time
Identify formation mobility (producibility and
potential super-charging
SmartPad, closed-loop sealing
High Sealing efficiency, safe time costs and
provides reliable data
Multiple drawdown experiments per pad
setting
Validate formation pressure data in-situ
Measurements while circulating
Reduced risk of getting stuck with BHA
High resolution real-time data
Gradient mapping possible while drilling
Variable pad size and shape
Pad selection for various formations
Tool face determination
Efficient operations in overgauge holes
Different drawdown pumps available
Wide range of overbalance (up to 800 bar
(8,700 psi)
Can be run with motors or RCLS
Pressure data in any type of environment
Pressure gauge close to pad
Reduced or no compressibility effects
4-3/4" TesTrak
©2011-2011 Baker Hughes Incorporated. All rights reserved.
TTK-70-01-001 Rev. A
Technical Data S ummary
4-3/4" TesTrak
General Tool Specifications
Tool Size (OD)
Hole Size Range
Nominal Hole Size
Tool OD
Centralizer OD
Tool Weight
Equivalent Stiffness OD x ID
Top of BHA Stop Sub cnx.
Tool Connections
Tool Length2 (A)
Memory
Operating Specifications and Limits
SI Units
US Units
121 mm
4-3/4"
146 mm - 191 mm)
5-3/4" - 7-1/2"
149 mm
5-7/8"
121 mm
4-3/4"
143 mm
5-5/8"
570 kg
1,257 lbs
n.a.
n.a.
NC38 or 3-1/2" IF Box
Box Up x Pin Down: Baker Hughes
Modular Connection1
7,45 m
24.4 ft
32 MB
SI Units
US Units
Tool Size (OD)
121 mm
4-3/4"
Flow Rate Range Min-Max
475 - 1325 lpm
125 - 350 gpm
(limited by MWD turbine configuration)
Max Drilling Torque3
12 kNm
8,850 ft-lbs
Max Drilling Torque to Failure3
27,5 kNm
20,300 ft-lbs
Max Overpull to Failure (w/o rotation)
2500 kN
560 klbs
Max Tensile Load
2970 kN
670 klbs
Max WOB
1120 kN
250 klbs
Max Bending Moment Rotating4
20 kNm
14,800 ft-lbs
Max Bending Moment Sliding4
40 kNm
29,500 ft-lbs
Temperature Operating Limits Min / Max
150°C / -20°C
302°F / 4°F
Max Hydrostatic Pressure
2070 bar
30,000 psi
Bit Pressure Drop
Max Dog Leg per 110 ft/30 m
Depends on mud weight & flow rate
Sliding / Rotary
Regarding RPM, Sand Content, and LCM please refer to Technical Data Sheets of the
applicable MWD platforms (e.g. OnTrak™, NaviTrak™).
Maximum Axial, Lateral, and Torsional
Refer to Supplemental Technical
Vibration
Specifications document
TDS-20-60-0000-00.
Drilling & Evaluation
2001 Rankin Road
Houston, Texas 77073
Phone: +1 713-625-4200
www.bakerhughes.com
Sensor Specifications
SI Units
US Units
Tool Size (OD)
Sensor Offset5 (B)
High Pressure Quartz Gauge
Pressure Range
Sensor Resolution
Accuracy
Real-Time Resolution
SmartPad
Sealing Element Contact Pressure
(adjustable)
SmarTest
Drawn Down Pressure Range
Variable up to
Drawn Down Rate
Variable up to
Drawn Down Volume
Variable up to
Mobility Range
Mobility Accuracy
121 mm
0,51 m
4-3/4"
1.7 ft
0 - 2070 bar
0 - 30,000 psi
0,00083 bar
0.012 psi
0.02% full scale
0,0034 bar
0.05 psi
0.5 - 5 MPa
73 - 730 psi
600 bar
8,700 psi
10 cm³/s
1.53 inch³
25 cm³
0.01 - 20,000 mD/cP (field experience)
±5%
1 To
connect to Baker Hughes components only
Shoulder to shoulder distance (NOTE: Measure points are tool specific and will vary
with the BHA make up at wellsite)
3 At the bit
4 For continuous operation
5 Distance of quartz gage from tool bottom (NOTE: Measure points are tool specific
and will vary with the BHA make up at wellsite)
2
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 Documentation & Records Management System(s) Group.
TTK-70-01-001