LOCKING MECHANISM FOR USE WITH TUBING OR CASING TONGS

摘要

A locking mechanism is described herein that is attachable to tubing or casing tongs to maintain the engagement of a clamping apparatus of the tubing or casing tongs with a tubular member using only the locking mechanism and the tubing or casing tongs. The tubing or casing tongs can also include a handle for supporting the clamping apparatus that engages the tubular member. The locking mechanism can include a pitman arm rotatably supported by the handle of the tubing or casing tongs. The locking mechanism also includes an adjustable sleeve slidably supported by the pitman arm and a tension arm rotatably supported by the adjustable sleeve to engage with the clamping apparatus.