Tool Comparison, Tomax

AST type XD XC XT XI TT
O means standard conf.
Features:
High DLS capacity X X X X
Extra spring capacity X X X X X
Pressure balanced X X X
200C/392F capacity X X X X
220C/425F capacity X
Internal recorder X
Applications:
Exploration X O X X
Deviated O X X
Lateral X O X
Coring/Milling O X X
Intervention X

Tool Comparison, External

Anti Stick-Slip
Technology
Shock-tool
(Axial)
Shock-tool
(Lateral)
Bumper
Sub
Drillstring
vibrator
Surface toque
controllers
MWD sensor-
subs
Product Examples AST Cougar ST5 HI-Tool™ Bumper-Sub Agitator ™, XPS™ Soft-Torque™ Co-Pilot™
DrillDoc™
Black-box™
(memory only)
Main scope/function Prevents cutter induced stick-slip Absorbs axial shocks Flexes sideways Keeps bit on bottom Breaks friction by continuous axial vibration Breaks up self- exited torsional harmonics Provides data for parameter optimization
Vibration mitigation axis Axial and rotation Axial Lateral Axial Rotation Rotation N/A
Active or passive interaction Active Passive Passive Passive Active Active N/A
Applications:
PDC X X X X X X X
Roller Cone X X X X X X X
Under-Reamer X X X
Rig Heave X X
Performance X X X X
Intervention X X X X

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