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Table T1. BHA configuration, Expedition 343.

Component
Description
OD
(inch)
ID
(inch)
Max OD
(inch)
Length
(m)
Cumulative
length
(m)
1 8-1/2 inch Smith PDC bit 6.000 2.250 8.500 0.25 0.25
2 6-3/4 inch bit sub 6.750 3.500 6.750 0.91 1.16
3 6-3/4 inch crossover sub 6.750 2.250 6.750 0.44 1.60
4 GVR-6 2 × 8-1/4 inch stabilizers 6.750 4.880 8.250 3.07 4.67
5 arcVISION6 6.750 2.810 7.500 5.77 10.45
6 TeleScope 675 6.750 5.109 6.890 8.52 18.97
7 Nonmagnetic drill collar 6.688 2.813 6.688 8.12 27.09
8 8-1/4 inch OD stabilizer 6.500 2.500 8.250 1.75 28.84
9 Crossover 6.750 2.250 6.750 1.52 30.36

OD = outside diameter, ID = inside diameter. PDC = polycrystalline diamond compact, GVR = geoVISION resistivity.

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