Tubular running tool

Abstract

An improved tubular running tool and method is disclosed for use on a rotary or top drive drilling rig of the type for inserting and selectively, internally gripping a tubular which may be utilized to lift, lower, rotate, and torque tubulars, and which may be used to fill and/or circulate fluid in and through tubulars and to cement tubulars within a wellbore. The internal tubular running tool may be used as or in conjunction with fill-up and circulating tools and with cementing head wiper plug assemblies among other tools. The tubular running tool includes an improved moving mechanism having a cylindrical pneumatic chamber annularly positioned with respect to a barrel element that forms an axial fluid pathway therethrough. A cylindrical piston is moveable within the cylindrical chamber to thereby move a cylindrical piston rod connected to gripping slips such that the slips selectively engage an interior portion of a tubular member.

Dependencies are inferred from the claim text.