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High-temperature Composite Bridge Plug

IP.com Disclosure Number: IPCOM000231887D
Publication Date: 2013-Oct-11
Document File: 1 page(s) / 76K

Publishing Venue

The IP.com Prior Art Database

Abstract

High-temperature thermoplastic mandrels allow extension of the operating temperature of composite bridge plugs above the current 200°F prox. maximum temp. A multistep sintering process may be used to form mandrels from powder. Injection molding or similar processes may be used to form mandrels from pellets. Materials to use include polyphenylsulfone, polysulfone, polyethersulfone, modified and alloyed versions of these. A polymer bridge plug is marketed for low temperature use (composite bridge plug). This discloses making a material substitution and redesigning to provide higher temperature capability. Whereas Nylon 6/6 has a heat distortion temperature around 200°F, polyphenylsulfone (PPSU) and polyethersulfone (PESU) have HDT ~ 400°F. PPSU has good creep resistance (100 hours at 338°F, the creep modulus is about 230ksi: under 2300 psi, the length changes 0.001" per 1.0" dimension).

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High-temperature Composite Bridge Plug

High-temperature thermoplastic mandrels allow extension of the operating temperature of

composite bridge plugs above the current 200°F prox. maximum temp. A multistep

sintering process may be used to form mandrels from powder. Injection molding or

similar processes may be used to form mandrels from pellets. Materials to use include

polyphenylsulfone, polysulfone, polyethersulfone, modified and alloyed versions of these.

A polymer bridge plug is marketed for low temperature use (composite bridge plug).

This discloses making a material substitution and redesigning to provide higher temperature

capability. Whereas Nylon 6/6 has a heat distortion temperature around 200°F,

polyphenylsulfone (PPSU) and polyethersulfone (PESU) have HDT ~ 400°F. PPSU has good

creep resistance (100 hours at 338°F, the creep modulus is about 230ksi: under 2300 psi, the

length changes 0.001" per 1.0" dimension).