TECH REPORT
GULF OF MEXICO
GREEN CANYON FIELD
Lithology
Casing size
135/8 in
Casing weight
Casing grade
Q125
Environment
Subsea salt
88.2 lbm/ft
Deep water
Cased Hole Whipstock System Saves 47 hours
on Deepwater GOM Well
Sidetracking operation mills clean, usable window and drills
through 63 ft of salt in one trip
Background
An operator drilling in the Gulf of Mexico (GOM)
needed to produce a clean, usable window in one
trip and drill a minimum 63 ft of rathole in the
subsea salt formation.
x,700
Technologies
x,800
■■
TrackMaster CH* cased hole whipstock system
■■
FasTrack* one-trip mill
0
Max Mmt-Y,
1000 lbf/ft
60
Using the TrackMaster CH system, the operator
milled a clean, usable window in 7 hours while
building the angle in the rathole section from
3.16° to 4.3° to obtain accurate MWD high-side
data with the directional assembly.
x,900
xx,000
xx,100
xx,200
xx,300
xx,400
xx,500
xx,600
-20
0
20
40
60
80
100
-80
slb.com/TrackMasterCH
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