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Table T1. Summary of all BHAs from Expedition 338 holes.

Hole Drilling Type Water depth (mbsl) Total
depth (mbsf)
Bottom-hole assembly
338-
C0002F LWD/MWD 1939.0 2005.5 12-1/4 inch bit × GVR × ARC-8 × TeleScope × 12-1/8 inch ILS × sonicVISION × 12-1/8 inch stab × 8-1/2 inch DC(1) × CST × Anderreamer × float sub × 9-1/2 inch DC(2) × 17 inch stab × 9-1/2 inch DC(1) × XO
C0002H RCB 1936.5 1120.5 10-5/8 inch RCB core bit × bit sub with 10-5/8 inch stab × RCB core barrel × top sub × head sub × 10-5/8 inch stab × 8-1/2 inch core DC(11) × 8-1/2 inch coring jar × 8-1/2 inch core DC(6) × XO × 5.68 inch HWDP(12) × XO
C0002I RCB 1936.0 1360.3 10-5/8 inch RCB core bit × bit sub with 10-5/8 inch stab × RCB core barrel × top sub × head sub × 10-5/8 inch stab × 8-1/2 inch core DC(11) × 8-1/2 inch coring jar × 8-1/2 inch DC(6) × XO × 5.68 HWDP(12) × XO × 5 inch DP S-140(42 stds) × 5-1/2 inch DP S-150
C0002J RCB 1937.5 940.0 10-5/8 inch RCB core bit × bit sub with 10-5/8 inch stab × RCB core barrel × top sub × head sub × 10-5/8 inch coring stab × 8-1/2 inch core DC(11) × XO × 5-1/2 inch DP S-150(12) × XO × 5 inch DP S-140(42 stds) × 5-1/2 inch DP S-150
C0002K HPCS/EPCS/ESCS 1937.5 286.5 11-7/16 inch core bit × bit sub × core barrel × landing sub × top sub × head sub × 8-1/2 inch core DC(11) × XO × 5-1/2 inch DP S-150(3 stds) × XO × 5 inch DP S-140(42 stds) × 5-1/2 inch DP S-150
C0002L ESCS 1937.5 505.0 11-7/16 inch core bit × bit sub × core barrel × landing sub × top sub × head sub × 8-1/2 inch core DC(11) × XO × 5-1/2 inch DP S-150(3 stds) × XO × 5 inch DP S-140(41 stds) × 5-1/2 inch DP S-150
C0012H LWD/MWD 3509.5 710.0 12-1/4 inch bit × GVR × ARC-8 × TeleScope × 12-1/8 inch ILS × sonicVISION × 12-1/8 inch stab × 8-1/2 inch DC(9) × 7-3/4 inch jar × 8-1/2 inch DC(3) × 5.68 HWDP(12) × 5 inch DP S-140(46 stds) × 5-1/2 inch DP S-150
C0018B LWD/MWD 3084.5 350.0 12-1/4 inch bit × GVR-8 with 12-1/8 inch stab (with float valve) × ARC-8 × TeleScope 825HF × NM XO sub × NMDC × 12-1/8 inch stab × 8-1/2 inch DC(9) × 7-3/4 inch LI jar × 8-1/2 inch DC(3) × XO × 5-1/2 inch DP
S-150(12) × XO × 5 inch DP S-140(42 stds) × XO × 5-1/2 inch DP S-150
C0021A LWD/MWD 2940.5 294.0 12-1/4 inch bit × GVR-8 with 12-1/8 inch stab (with float valve) × ARC-8 × TeleScope 825HF × NM XO sub × NMDC × 12-1/8 inch stab × 8-1/2 inch DC(9) × 7-3/4 inch LI jar × 8-1/2 inch DC(3) × XO × 5-1/2 inch DP
S-150(12) × XO × 5 inch DP S-140(42 stds) × XO × 5-1/2 inch DP S-150
C0021B HPCS/EPCS 2940.5 194.5 11-7/16 inch core bit × bit sub × core barrel × landing sub × top sub × head sub × 8-1/2 inch DC(11) × XO × 5-1/2 inch DP S-150(12) × 5 inch DP S-140(27 stds) × 5-1/2 inch DP S-150
C0022A LWD/MWD 2675.5 420.5 12-1/4 inch bit × GVR-8 with 12-1/8 inch stab (with float valve) × ARC-8 × TeleScope 825HF × NM XO sub × NMDC × 12-1/8 inch stab × 8-1/2 inch DC(9) × 7-3/4 inch LI jar × 8-1/2 inch DC(3) × XO × 5-1/2 inch DP
S-150(12) × XO × 5 inch DP S-140(42 stds) × XO × 5-1/2 inch DP S-150
C0022B HPCS/EPCS/ESCS 2674.0 419.5 11-7/16 inch core bit × bit sub × core barrel × landing sub × top sub × head sub × 7 inch DC(15) × XO × 5-1/2 inch DP S-150(12) × 5 inch DP S-140(42 stds) × 5-1/2 inch DP S-150

LWD = logging while drilling, MWD = measurement while drilling. RCB = rotary core barrel, HPCS = hydraulic piston coring system, EPCS = extended punch coring system, ESCS = extended shoe coring system. GVR = geoVISION resistivity tool, ILS = instrument landing system, CST = concentric string tool. Stab = stabilizer, XO = crossover. DC = drill collar, NMDC = nonmagnetic drill collar. HWDP = heavy weight drill pipe, DP = drill pipe.

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