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1. (WO2017151484) SUBTERRANEAN PACKER SEALING SYSTEM LOAD DIVERTER

Pub. No.:    WO/2017/151484    International Application No.:    PCT/US2017/019628
Publication Date: Sat Sep 09 01:59:59 CEST 2017 International Filing Date: Tue Feb 28 00:59:59 CET 2017
IPC: E21B 33/12
E21B 33/127
E21B 17/00
Applicants: BAKER HUGHES INCORPORATED
Inventors: MAENZA, Frank, J.
CONNER, Nicholas, S.
ANDERSON, Gary, L.
Title: SUBTERRANEAN PACKER SEALING SYSTEM LOAD DIVERTER
Abstract:
A mandrel and a packer outer assembly are formed to create spring compartments on opposed sides of a sealing element. The outer assembly is shear pinned to the mandrel to minimize spring travel during setting. Once set in the normal way the presence of the springs transfers load and sustained loads through the connected tubular string in either direction. A load coming from downhole and acting in an uphole direction first compresses the spring located uphole from the sealing assembly so that the loading goes behind the sealing assembly and into the upper spring and ultimately to the upper slips. The reverse happens when the force is coming from uphole of the sealing assembly and acting in a downhole direction. The springs can be a coil, a stack of Belleville washers, fluid pushed through an orifice, a resilient material or a contained compressible fluid, to name some examples.