METHOD AND APPARATUS FOR HANGING TUBULARS IN WELLS

摘要

A tubular expander comprises a hydraulic ram including a cylinder with a shoulder at one end and a draw bar extending through the shoulder. The draw bar has a beveled outer surface portion and an outer shoulder. A collet about the draw bar includes a ring and segments cantilevered from the ring along the draw bar toward the hydraulic ram. The segments each have a beveled inner surface portion slidably mating with the beveled outer surface portion to radially expand the collet with axial movement of the collet relative to the draw bar toward the cylinder and an inner shoulder facing the outer shoulder of the draw bar to limit movement of the collet relative to the draw bar. The shoulder of the cylinder extends beyond the cylinder to receive at least a portion of the collet therein.