Collapsible casing tightener and method of use

Abstract

A collapsible casing tightener comprising an outer body with hollow cylindrical main section open at one end and closed at the other at a shoulder. A reduced neck protrudes from the shoulder to a collar for attachment to a drill rig. The cylindrical main section is defined by a radial array of angularly spaced notches each comprising a narrow aperture through the wall. Internally, a hollow pipe section extends coaxially within from the neck to a distal cylindrical receptacle with a threaded female joint. An extendable inner body is telescopically inserted into the outer body between the cylindrical main section and hollow pipe section, the inner body having pins affixed therein and carried within the notches for guided extension. The collapsible casing tightener replaces time consuming, inefficient hand tightening of multiple drill rod segments and casing segments with a wrench with telescopic extension and retraction followed by drill-assisted rotation.

Dependencies are inferred from the claim text.