[PDF] Drilling Accessories - RDT, Inc.
Other sizes are available through special order. Drilling. Accessories. Square. Kelly. A. C. D. 20" ... This sub would be used to extend the life of the kelly by taking the connection wear ... can be equipped with a rubber protector to reduce BOP equipment and casing wear resulting ... Subs from selected bars of alloy steel. Our.
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rdt-usa's website is rdt-usa.com