Crossover sub

China Crossover Sub

Crossover Sub Product Details

Crossover sub is mainly used to connect upper and lower drill tools in different connectors in drilling operations. Also it can be used to protect other tooling in drill stem (called saver sub) or be used to deliver outgoing air to the bit face just above the bit (called bit sub).

  • The length of crossover subs is generally measured from shoulder to shoulder.
  • Typical lengths range from 6″ – 28″ long going up in increments of 2 inches with AISI 4145H, AISI 4145H Mod, AISI 4340, AISI 4140-4142 and Non-magnetic material.
  • All connections are phosphate-coated or copper plated to improve resistance to corrosion.
  • Crossover subs come in three basic types: A Pin (male) * Box (female); B Pin (male) * Pin (male); C Box (female) * Box (female)
crossover sub circulating sub pump in sub saver sub_副本
crossover sub circulating sub pump in sub saver sub

Crossover Sub Specifaction

Crossover sub
DescriptionUpper Connection patLower Connection PartType
Kelly cross-over subKellyDrill pipeA or B
Drill pipe cross-over subDrill pipeDrill pipeA or B
Interim cross-over subDrill pipeDrill collarA or B
Drill collar cross-over subDrill collarDrill collarA or B
Drill bit cross-over subDrill collarDrill bitA or B
Swivel cross-over subSwivel lower subKellyC
 Fishing cross-over subKellyDrill pipeC
Drill pipe Fishing tools
** Crossover sub can be customized as per customer’s design.
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