Wellhead union with safety interlock

Details Wellhead union with safety interlock Wellhead union with safety interlock

1997-04-01

1999-10-19

Dang, Hoang C.

Wells

Processes

Assembling well part

166 7513, 166 951, 166135, E21B 3302

Patent

active

059672358

ABSTRACT:
A wellhead union and associated methods provide enhanced safety in operations involving access to, and/or fluid communication with, a wellhead. In a described embodiment, a wellhead union has a housing structure which includes a fluid conduit and a plug. A safety interlock prevents removal of the plug from the fluid conduit when fluid pressure is present within the wellhead. As a warning that such fluid pressure is present within the wellhead, the safety interlock additionally provides an externally visible indication when the fluid pressure is present.

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