Hydril WT™ Drill Pipe Tool Joint

Available in Sizes from 2-3/8" to 6-5/8"

Key Achievement

The WT tool joint proved that high-torque drill pipe could have a large ID and small OD. In smaller diameters, the connection virtually eliminated overtorque failures that previously caused strings to part.


  • Wherever hydraulic efficiency adds value
  • Highly deviated, extended-reach and horizontal applications

Key Features/Benefits

  • Exceptional torque strength—without the use of a torque shoulder—is independent of the tool joint OD
  • Retains full torque and tension down to bevel diameter
  • Wear indicators provided at separation of the box face and on the pin shoulder
  • Two-step, tapered thread stabs deep and makes up easily
  • Stress-reduction grooves minimize effects of over-doping
  • Pipe body sealing capability for internal and external pressure comes from thread and lubricant
  • Damaged threads can be field-repaired
  • Retains sealing performance under high axial, bending loads