A Thermally Actuated Gas-Lift Safety Valve

Autor:	Eric Gilbertson, Franz S. Hover, Donald Bryan Freeman, Eduardo Colina
Rok vydání:	2013
Předmět:	Materials science business.industry Energy Engineering and Power Technology Mechanical engineering Structural engineering Globe valve Fuel Technology Ball valve Four-way valve Closed position Valve guide business Safety valve Body orifice Butterfly valve
Zdroj:	SPE Production & Operations. 28:77-84
ISSN:	1930-1863 1930-1855
DOI:	10.2118/161930-pa
Popis:	Summary Most offshore oil wells use flow-control safety valves that are either actively controlled from the surface or passively actuated by pressure changes. In this paper, we propose a passive, thermally-actuated safety valve that adds redundancy to well systems and significantly increases well safety. We use quasistatic thermal modeling, validated with experimental downhole data, to identify and characterize a suitable temperature regime for shape memory alloy actuation. We develop a complete loading and shut-in procedure with the new valve that is consistent with current practice in artificial lift. Finally, through a true-scale stainless-steel prototype, we demonstrate essential manufacturability and successful valve closure in accordance with predictions.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::7ada3ab916bafcd2f9c3ccddf926cf35 https://doi.org/10.2118/161930-pa Zobrazit plný text záznamu