TOP DRIVE POWERED PIPE TONG

Brand	Owner	Address	Description
EVOLUTION	FRANK'S INTERNATIONAL	Suite 400 1311 Broadfield Blvd. Houston TX 77084	Top drive powered pipe tong systems for use in making up and running tubular strings in oil and gas wells;
	Where the owner name is not linked, that owner no longer owns the brand

Technical Examples

A power tong or back-up tong has a jaw assembly that is advanced into engagement with a pipe through a cam follower that contacts the camming surface on the inside circumference of a ring gear, the cam follower being in the form of a series of roller elements arranged as a circulating bearing. In a preferred form, the roller elements are cylindrical roller bearings and the jaw assembly is mounted for sliding advancement towards the pipe to be engaged. In an alternate variant the cam follower includes an indexing guide that maintains the cylindrical roller bearings in proper alignment.