Crossover Subs (Interchange Assemblies)

The Dual Tube Reverse Circulation drilling technique allows the use of Conventional DTH hammers in conjunction with an interchange assembly mounted above the hammer. In this case, the cuttings move up the side wall and are forced into the inner tube through the open slots located on the interchange assembly.

  • The Dual Tube Reverse Circulation drilling technique
  • The Dual Tube Reverse Circulation drilling technique