Geothermal well head and actuator assembly

Details Geothermal well head and actuator assembly Geothermal well head and actuator assembly

E - Fixed Constructions

21

B

166/41

E21B 43/12 (2006.01)

Patent

CA 1205739

ABSTRACT OF THE DISCLOSURE A valve supporting tubular assembly capable of being mounted on a geothermal well head, with the tubular assembly of such structure that an internal plug that supports resilient packers and has circumfer- entially extending teeth defined thereon may be remov- ably locked in a first position to seal the interior of the tubular assembly above the outlets to the valves, the plug may also be moved longitudinally in the tubular the pressure a~ove and below the plug in the tubular assembly to scrape solids deposited on the interior sur- face be moved to a second position to pack off the inter- ior of the tubular assembly below the valve outlets to permit the valves to be moved or maintenance work per- formed thereon without shutting down the geothermal well. In addition, the plug is provided with means to equalize the pressure above and below the plug in the tubular assembly to permit the plug and components situated thereabove to be removed from the tubular assembly. A gate valve is situated above the valve sup- porting assembly and is normally open, with the gate valve supporting a hydraulic cylinder that serves to longitudinally move an actuator connected to the plug.

431749

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