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Drill Collar Lift Subs

rotary shoulder lift sub Lift subs fall under the drill string accessory tool category and are utilized to mobilize various tools during drilling or fishing operations. Lift Subs are manufactured to the following specs connections, lengths, weights and material grade.

All Crossover lift subs are made with AISI 4140/4145. They are machined and heat-treated according to drill collar specifications.

When ordering or requesting a quote, please specify:

  • Drill collar OD (A)
  • Tool joint OD (B)
  • Tapered, square shoulder or combination
  • Drill pipe OD (C)
  • Drill collar connection size & type (D)
  • Bore
  • Pressed steel or steel thread protectors


drill pipe lift sub diagram