Packer

摘要

A packer for a well is described. The packer comprises at least one packing element, at least one anchoring element, and a mandrel coupled to the at least one anchoring element. The packer is arranged such that, once set, the mandrel is free to move with respect to the packing and anchoring elements. In one embodiment the at least one anchoring element is integral with the at least one packing element. In an alternative embodiment the at least one anchoring element is separate from the at least one packing element.

主权项

1. A packer for a well comprising:
at least one packing element; at least one anchoring element, and an interlock mechanism for controlling the sequential setting of first the at least one anchoring element and then the at least one packing element; and a mandrel coupled to the at least one anchoring element, wherein actuating the at least one anchoring element and the at least one packing element releases the mandrel to move with respect to the at least one packing element and the at least one anchoring element, and wherein the at least one packing element and the at least one anchoring element are integral, and the interlock mechanism comprises: a deactivation element configured to move with respect to the mandrel upon application of a predetermined pressure; a packer setting sleeve configured to move with respect to the mandrel from a packer run-in position to a packer set position; a plurality of packer setting sleeve dogs for releasably retaining the packer setting sleeve in the packer run-in position; and a plurality of mandrel dogs for releasably retaining the mandrel with respect to the at least one integral packing/anchoring elements until said packing/anchoring elements are set.