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. The Slips, Shafts, and Air Operating Mechanisms are protected by guards to prevent damage caused by the elevators or other outside forces. Through research and field testing our engineers are constantly on the look out for additional improvements which will assure the personnel in the field of receiving the safest and most maintenance free equipment that is available.
The Cavins “Advance” Spider is available in five models, Model “B”, “C”, “C-HD”, “F”, and “G”. All are designed for manual, compressed air, or hydraulic operation with the exception of the Model “G” which is available for compressed air or hydraulic operation only.
All Cavins “Advance” Spiders may be used on a rotary table with an adapter plate that fits into the square drive or pin drive master bushing, centering the Spider on the rotary table. This also permits the manually operated Spider to be rotated.
Models “B”, “C”, and “C-HD” Spiders may be equipped with a Gate and Slips which are relieved to pass parallel strings of tubing. If the Spider is to be used with both single and parallel strings to any extent, it is recommended that both kinds of Slips and Gates be ordered. A standard feature of all Cavins “Advance” Spiders is a specially designed Gate Section which will allow the running of an electric submersible pump cable simultaneously with any size tubing string.
The CAVINS “Advance” Model “F” Automatic Spider is another industry tested and proven tool. Similar to the Model “B” and Model “C” Spiders, the Model “F” offers manual, pneumatic(air) or hydraulic operation mechanisms. The Model “F” Spider can handle tubular goods ranging in size from 2-3/8" O.D. through 8-5/8" O.D. and is favored for automation in light drilling operations or for heavy workover and production rigs. The load capacity for the Model “F” Spider is 400,000 lbs. NOW the Model “F” Spider is available also with CAVINS patented, Type “FCR” Full Circle Slips, with Replaceable Type “FCI” Inserts. The conventional, Type “TD” Slips, with Replaceable Inserts are also available.
For heavy drilling operations, up to 700,000 pounds (350 tons) hook load capacity; the CAVINS “Advance” Model “G” Automatic Spider, is recommended where heavy duty, dependable service applies. The Model “G” Spider will handle tubular goods ranging in size 2-3/8" through 13-3/8" O.D. and is available for pneumatic (air) or hydraulic operation. Like all CAVINS “Advance” Spiders, the Model “G” utilizes a minimum of moving parts for ease of operation and very minimal maintenance. CAVINS patented and proven Type “FCR” Full Circle Slips with replaceable Type “FCI” Inserts, are used for the complete range of sizes in the Model “G” Spider. The long 16" gripping area plus 360˚ degree, 100% contact of the Type “FCI” Inserts, makes it the most positive pipe holding device of its kind. Competition can boast only a maximum of 70% contact of the pipe. The clear advantage being greater contact area causing far less chance of damaging or crimping heavy strings of pipe. Another proven asset of the CAVINS unique design is that there is no need for costly pipe guides to attach to the spider because the Slips and Inserts withdraw completely from the Spider Bowl and when disengaged allows full protection from damage by the string when it is in motion.
Westco Tubing Spiders have been proven to be an excellent tool for safe, economical, trouble free handling of tubular goods. and can handle a wide range of tube sizes. Contact World Petroleum Supply for details.