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1. (WO2017034671) CONVERTIBLE PLUG SEAL ASSEMBLY

Pub. No.:    WO/2017/034671    International Application No.:    PCT/US2016/039988
Publication Date: Fri Mar 03 00:59:59 CET 2017 International Filing Date: Thu Jun 30 01:59:59 CEST 2016
IPC: E21B 23/01
E21B 33/12
E21B 33/129
E21B 33/134
E21B 43/10
Applicants: PARKER-HANNIFIN CORPORATION
Inventors: DUDZINSKI, Paul
Title: CONVERTIBLE PLUG SEAL ASSEMBLY
Abstract:
A plug seal assembly (10) for use in a well casing includes a tubular housing (12) and a mandrel (14) that is moveable within a hollow bore (21) of the housing (12) from a first position to a second position. The housing has first (24) and second (26) sections at opposite ends (20, 22) of the housing, and the first section (24) has a thickness greater than that of the second section (26). In the first position, the second section (26) has an inner diameter smaller than that of the first section (24), and as the mandrel (14) moves, the mandrel forces the second section (26) to expand outward such that in the second position, the inner diameters of the first (24) and second (26) sections are substantially the same. The assembly further may include an outer sealing element (16) and an outer slip (18) with biting teeth (38). As the mandrel (14) moves, the sealing element (16) compresses between the housing (12) and the well casing, and the biting teeth (38) grip the well casing.