Integrated Drilling Solution of Talon PDC Bit and AutoTrak G3 RSS

CASE HISTORY
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Integrated Drilling Solution of Talon PDC Bit and AutoTrak G3
RSS Result in Longest Single Run in Complex Deepwater Field
Location: Troll Field, North Sea Shelf, Norway
6500
Results
nn16,597
100
10500
Interval, ft
120
ft (5 059 m) drilled in
one run
80
12500
60
14500
nnROP
ROP, ft/hr
8500
Talon PDC bits
Drilled total of 16,597 ft
Competitor 6-bladed PDC bits
with 19 mm cutters
Drilled total of 15,856 ft
40
16500
20
18500
of 98.8 ft/hr (30.1 m/hr)
Challenges
nnComplete
the long horizontal 8½-in.
section and open-hole sidetrack to
TD in one run
nnSteerability
0
C-Class Calcite %
Competitor Drilled
TD606X Drilled
ROP
and wellbore
collision issues
nnSandstone
An operator drilling horizontally in Troll Field
on the North Sea shelf wanted to complete
a lengthy 8½-in. section and planned
open-hole sidetrack to total depth (TD) in
one run. Previous runs in the Troll Field
encountered numerous unpredictable zones
of calcite cementation as well as several
wellbores in close proximity of each other,
so reservoirs in this field present significant
directional challenges. Bit steerability, stability,
and durability to endure the run are critical
factors in reaching total depth.
To optimize the integrated bottomhole
assembly (BHA) design, new procedures
were developed that enabled drilling to total
depth (TD) in one run. In collaboration with
the customer, the Baker Hughes DART design
application review team and Drilling Services
team worked together to develop a solution.
Baker Hughes recommended the Talon™
high-efficiency polycrystalline diamond
compact (PDC) drill bit integrated with the
AutoTrak™ G3 rotary steerable system (RSS),
and CoPilot™ measurement-while-drilling
(MWD) system. In addition, the Baker Hughes
Reservoir Navigation Services provided active
geosteering with azimuthal logging while
drilling (LWD) data.
The Talon bit’s StaySharp™ cutters and
EZCurve™ directional technology maintained
steerability and reduced vibrations to mitigate
BHA tool failure. The AutoTrak G3 RSS
provided precise well control and trajectory.
The CoPilot MWD system delivered real-time
drilling optimization data to optimize drilling
performance. LUBE-622 biodegradable esterbased lubricant reduced torque and drag in
water-based muds to quickly achieved high
rates of penetration.
formation with
hard interbedded calcite
cemented stringers
Baker Hughes solution
nnCollaboration
between Baker Hughes
Drilling Services, DART drill bits
evaluation group, and the customer
nnTalon
high-efficiency PDC bit with
StaySharp cutter technology and
EZCurve directional technology
nnAutoTrak
nnLUBE-622
The operator was able to drill a record
distance for Troll Field of 16,598 ft (5 059 m)
including an open-hole sidetrack in one single
run. ROP averaged 98.8 ft/hr (30.1 m/hr),
27% faster than the planned benchmark of
72.2 ft/hr (22.0 m/hr).
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© 2014 Baker Hughes Incorporated. All rights reserved. 42361 01/2015
G3 RSS
biodegradable lubricant