Safety switch for well operations

A pressure controlled safety switch comprises an electrical switch disposed in a cavity of a mandrel. A bellows assembly is operably engaged with the electrical switch. The bellows assembly is in fluid communication with a fluid surrounding the mandrel such that a pressure in the fluid no less than...

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Bibliographic Details
Main Author LUDWIG WESLEY N
Format Patent
LanguageEnglish
Published 02.02.2016
Subjects
BASIC ELECTRIC ELEMENTS
EARTH DRILLING
EARTH DRILLING, e.g. DEEP DRILLING
ELECTRIC SWITCHES
ELECTRICITY
EMERGENCY PROTECTIVE DEVICES
FIXED CONSTRUCTIONS
MINING
OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR ASLURRY OF MINERALS FROM WELLS
RELAYS
SELECTORS
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Summary:A pressure controlled safety switch comprises an electrical switch disposed in a cavity of a mandrel. A bellows assembly is operably engaged with the electrical switch. The bellows assembly is in fluid communication with a fluid surrounding the mandrel such that a pressure in the fluid no less than a predetermined pressure causes the bellows to activate the electrical switch, and a pressure in the fluid less than the predetermined pressure causes the bellows to deactivate the electrical switch.
Bibliography:Application Number: US201113812513