Crossover subs

Ex - Factory API Drilling Cross Is Used To Sell Oil Wells Product Description Cross connections are used to connect up and down the drill pipe in different connections during drilling operations. It can also be used to protect other tools in the drill pipe (called guard joints) or to transport the discharged air to the bit face above the bit (called bit joints). Crossover sub Description Upper Connection pat Lower Connection Part Type Kelly cross-over sub Kelly Drill pipe A

API Oil Field Drilling Cross Joint Reduced Section Joint Product Description Conversion joints are used to convert from one connection size to another or as disposable components to extend the connection life of more expensive drill pipe members. Crossover sub Description Upper Connection pat Lower Connection Part Type Kelly cross-over sub Kelly Drill pipe A or B Interim cross-over sub Drill pipe Drill collar A or B Drill bit cross-over sub Drill collar Drill bit A or B

Saver sub for horizontal directional drilling Product Description 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)