The “Advance” Spider developed by Cavins Oil Well Tools is considered to be the pioneer in power slips. Through years of experience and testing, many improvements have been made which make the Cavins “Advance” Spider the leader for a safe, economical, and trouble-free handling of tubular goods. Heat treated alloy steel is used throughout for the greatest possible strength and the longest wearing life with a minimum of weight.
The shafts are hardened alloy steel for longer life. Replaceable steel bushings are fitted into the journal bearings. All bearings and journals are equipped with grease fittings for lubrication. Air Cylinders and Foot Valves are mist lubricated through the airstream. All Cavins “Advance” Spiders are equipped with a manually operated safety latch which may be used to positively lock the slips in their set position. Because of the low operating pressure the slips cannot release from the tubing until it has been raised by the elevators, thus guarding against a lost string in the event that the Foot Valve is tripped accidentally.
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