PRODUCTS: CrossOver Subs


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
Crossover Subs
Tool Connection Saver Subs
Weaper 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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