Product Description
This 120 mm insert tricone bit converts to 4.72 in and is positioned for geothermal or water-well drilling in medium-hard consolidated rock. Three cones distribute rolling contact, while insert teeth provide the structure permitted for medium through hard formations. Review its application in the geothermal drilling archive and compare the selected ground in the hard formation archive. The source filename also references mining, but the project compatibility table directs tricone products to the listed well applications.
The media name identifies a tricone with steel and insert-tooth options and a trailing 120 size reference, recorded as 120 mm. This reviewed model uses tungsten-carbide inserts and three cones. IADC 537 is selected from the allowed medium-hard insert codes. The filename does not state bearing, seal, circulation, or API Reg connection, so those fields remain empty. Confirm the actual bit marking and thread before it is attached to a rotary assembly. Check that all cones turn consistently and that no insert stands visibly proud or missing at the gauge.
Use 3,000–8,000 lbf/in of bit diameter and 60–120 RPM. Begin with balanced loading and inspect returns for a change from medium rock to the 15,000–30,000 psi hard class. No tricone flow value is provided, and the PDC 250–650 gpm reference must not be copied. Classification information is available from the IADC. The limitation is tooth and bearing condition: an overloaded, chipped, or restricted cone cannot be corrected by more WOB and should be inspected before continued drilling.
