INROCK® stocks the largest inventory of HDD crossover subs in the world. All subs are manufactured by INROCK® by API standards including full material certification and quality assurance.
Large Rig Crossover Subs (4 1/2" IF - 6 5/8" connections) require "neckdown" transition zones for minimum drilling strength.
Non-Magnetic Orientation Subs
Tool Connection Saver Subs
API/Vermeer®/Jet Trac®/CASE®/PH6 and more.
Most of our subs are always in stock and available for immediate delivery. Overnight delivery available on many not-in-stock subs. All connections are cut to strict tolerance using certified hardened and ground gauges. Machined from heat-treated 4140 alloy for superior strength and durability.
INROCK® also offers Non-Magnetic orientation subs for magnetic guidance services. Sizes range from 4 1/8" to 8" Orientation Subs.
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