公开(公告)号：US20160290093A1

公开(公告)日：2016-10-06

申请号：US14954525

申请日：2015-11-30

Applicant: BAKER HUGHES INCORPORATED

Inventor： James C. Doane ,  Jason M. Harper ,  Yingqing Xu ,  Barbara A. Pratt ,  Gary L. Anderson ,  David S. Bishop ,  Antonio C. Ruffo ,  Robert J. Taylor ,  Anton David ,  David K. Acquaye

IPC: E21B33/128 ,  E21B33/129

CPC classification number: E21B33/128 ,  E21B33/129 ,  E21B33/1291

Abstract: A compression set sealing element preferably 85A-95A TDI-Ester Polyurethane is compressed axially and retained against extrusion by CEM anti-extrusion rings. The compressed state of the sealing element is locked in by a degradable lock ring assembly. The mandrel is secured to an upper end of a slip cone and a breakable slip ring is secured by a wireline setting tool until the set position is reached. The slip ring breaks into segments that are pulled up the slip cone as the setting tool pushes on a sleeve to axially compress the sealing element and lock in the set. The sealing element is retained against extrusion by CEM anti-extrusion rings. When the setting tool is removed a ball seat is exposed for delivery of a ball to build pressure into the formation for fracturing. The entirety of the plug then disintegrates from well fluid exposure.