trackmaster cased hole whipstock
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TrackMaster CHApplicationsSidetracking from 4-in to 20-in casing sizes for all grades of casing exits
expandable casing exits
liner exits
low-side casing exits
dual and triple casing exits
restricted holes
Benefits High-quality, application-specific casing exits One-trip reliability
Efficient, extended-length rathole drilling in
high- to low-strength formations
Features Multiramp whipstock enhances milling and improves effective
dogleg across exit window.
Whipstock mills deliver casing exits and ratholes efficiently.
Anchor options allow a fully retrievable whipstock system and
an isolation packing element.
One-trip set and drill-ahead systems are available options.
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The TrackMaster CH* cased hole
whipstock system delivers quality,full-gauge windows for exitingsteel casing. Premium mills enablequality window exits in high-gradesteel and chrome casings and
in formations with unconfinedcompressive strengths of morethan 40,000 psi. The systemsfast, high-quality windows andsidetracks are tailored to eachapplications objectives.
The TrackMaster CH system is designed to offer quality casing exits in standard andhigh-grade steel and chrome casings.
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Window modelingCasing exit window modelingThe WhipSim casing exit simulation
software models the milling operation, thewindow geometry of the milled window,
and testing of the pass-through capability
of the follow-up assemblies for the
completed window.
The information is used to predict window geometry on exit casing
size and shape of the wellbore section
formed by the whipstock, casingwindow, and formation
rathole trajectory
curvature and dogleg severity (DLS)
of liners or BHAs going through the
sidetrack system.
WhipSim software analyses help ensure
that completion strings are not affected
by the dogleg across the whipstock. Thesoftware calculates DLS for a liner or BHA
pass-through and forces and stress of
the liner or BHA.
Milling systems designed with the IDEAS platform and modeled with WhipSim software ensure smooth casing exitsand minimize kickoff DLS.
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Surface parameter modelingThe Runner drillstring analysis program provides a complete sidetracking operation
model to help analyze surface parameters, torque and drag, setting operations for
anchors and shear bolt activation, and contact forces and buckle states of the working
string in the departure operation. Runner modeling is used for prerun analysis and for
postjob verification.
Once the actual operation has begun, the Runner program provides a real-time analysis of
the modeled parameters as compared with the actual parameters.
The Runner program provides a complete sidetrackingmodel and real-time analysis of the modeled parameters.
Simulation and real-time analysis
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Window executionHigh-quality, full-gauge windowsThe TrackMaster CH systems three-part ramp-and-mill design
offers milling efficiency and high-quality casing exit windows.High-quality, full-gauge windows offer more completion options.
The fast-cutout ramp at the top of the whipstock cradles a full-
gauge lead mill while running in hole and sets the necessary
kickoff angle to initiate cutout. The result is a full-gauge
window within a few inches of the cutout.
The full-gauge section of the whipstock extends the window
and maximizes the window quality while reducing DLS.
The midramp accelerates the lead mill past its center point,facilitating completion of the window and rathole in one run.
The lead and follow mills work together to createtwo unique cutouts, and as milling continues,
a single window is completed. This two-millconfiguration allows placement of the window top
above the whipstock slide for improved effectivedogleg across casing exits and kickoffs.
Mills first cut
Mills through
Whip and window
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10Secure anchoring options include (from left to right) the hydraulically actuated expandable anchor,the retrievable anchor, the retrievable anchor with packer assembly, and the permanent packer anchor.
Secure placement foreffective performance
The TrackMaster CH system has four typesof anchors to secure the whipstock system
during sidetracking operations.
The hydraulically actuated expandable
anchor secures placement of the
whipstock in the wellbore. The most
versatile anchor option, it provides
flexibility for a range of casing sizes
and for any tool size when borehole
isolation with a packing element is
not required.
The retrievable anchor is a hydraulically
set anchor system.
The retrievable anchor with packer
assembly is a hydraulically set anchor
system for use when borehole isolation
with a packing element is required. The permanent packer anchor is used
when borehole isolation with a permanent
barrier is required.
Anchoring options
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Case Studies
Low-side casing exitsaves USD 655,000PEMEX used the TrackMaster CH system to
perform the first deepwater low-side casing
exit in Mexico. After borehole instability
caused a fish to be left in the borehole, theTrackMaster CH system was modified for the
low-side sidetracking.
The system milled an 11-in casing exit with
a low-side toolface orientation of 154 and
drilled a rathole in one trip so that drilling
of the section could continue. Low-side
orientation reduced wellbore inclination,
offering a complete solution for the directional
trajectory and saving USD 655,000.
Mexicos first deepwater low-side casing exit
performed in one trip
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Case Studies
Single-trip, dual-casing exit performed
for the first time in India
Cased hole whipstock system saves4 days in soft shale formationThe TrackMaster CH whipstock system
was used to perform the first single-trip,
dual-casing exit offshore India. More than
22.9 ft [7 m] of casing was milled to create afull-gauge window, and 6.6 ft [2 m] of rathole
was drilled in the soft shale formation.
The entire operation, which usually takes
8 days, was completed in only 4 days. The
sidetracking BHA entered the rathole and
successfully drilled ahead on the first attempt.
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Case Studies
Cased hole system sets performancelevel in Texas oil fieldAn operator drilling in a hard and cherty
limestone field outside Midland, Texas, US,
ran the TrackMaster CH system with the
FasTrack one-trip mill to create a window anddrill a rathole in one run. Sidetracking out of
the 7-in casing required a cutting structure
that could mill the casing and drill the rathole
in the hard formation.
A clean, full-gauge window was milled in
1.5 hours with the bottom of the window at
1,782 ft [543.2 m]. The 3-ft [.09-m] rathole was
drilled in 0.5 hour, and the entire operation
was completed in one run.
Clean, full-gauge window milled and rathole
drilled in hard and cherty limestone in 2 hours
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Case Studies
Whipstock assembly completescasing exit and rathole in 11 hoursIn the Gulf of Suezs East Zeit field, the
TrackMaster CH system was designed
with anchors large enough to set in a 30-in
casing and drill a 20-ft [6.1-m] rathole forDana Petroleum.
In a single trip, the 16-in OD TrackMaster CH
whipstock lead and follow mills completed
a 17.5-in, 22-ft [6.7-m] long exit in the
30-in casing. The exit was milled and
dressed in 11 hoursthe first time an
exit was completed through 30-in casing.
The whipstock assembly also drilled a 20-ft
rathole, enabling the 16-in directional BHA
to pass through the casing exit and drill ahead
without delays.
First exit through 30-in casing
completed in Gulf of Suez
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*Mark of Schlumberger.
Other company, product, and service names are the properties of their respective owners.
Copyright 2013 Schlumberger. All rights reserved. 12-DT-0042
TrackMaster CH
slb.com/TrackMasterCH
Find out more about the TrackMaster CH cased hole whipstocksystem at slb.com/TrackMasterCH.
IDEASIntegrated drillbit design platform
slb.com/IDEAS
i-DRILL
Engineered drilling system designslb.com/i-DRILL
AnimationWatch an animation that illustrates how
TrackMaster CH cased hole whipstock
system works.
Case StudiesRead more about how the TrackMaster CH system
performed the first low-side deepwater casing
exit in Mexico and saved USD 655,000
completed the first dual-casing exit in a single
trip in India, saving USD 200,000
delivered the worlds first three-string casing
exit in one trip in the US.