Patent ID: 8157006
Filing Date: 2012-04-17
Classification: E21B

Abstract:
1. A fracturing isolation sleeve for sealing an internal portion of a wellhead assembly for a well, the assembly having at least one wellhead device with an internal bore, comprising: an upper sleeve portion having an internal bore; a lower sleeve portion having an internal bore and coupled with the upper sleeve portion and adapted to be telescopically coupled to the upper sleeve portion at an expandable joint to selectively establish different total lengths of the combination of the upper sleeve portion and the lower sleeve portion; and a sleeve retention mechanism coupled to the upper sleeve portion to hold the isolation sleeve in relative longitudinal position to the wellhead device, the sleeve retention mechanism adapted to be actuated independent of a rotation of the upper sleeve portion, wherein the sleeve retention mechanism comprises a retaining nut having an internal bore and threads adapted to mate with corresponding threads on the wellhead device, the retaining nut adapted to be rotated independent of the upper sleeve portion and engage the wellhead device to hold the isolation sleeve in relative longitudinal position to the wellhead device, the isolation sleeve being sized to fit within the internal bore of at least the one wellhead device and adapted to be selectively coupled to at least the wellhead device.