Wells – Processes – With indicating – testing – measuring or locating
Patent
1999-05-05
2000-08-08
Dang, Hoang
Wells
Processes
With indicating, testing, measuring or locating
166113, E21B 2108
Patent
active
06098709&
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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Dang Hoang
Halliburton Energy Service,s Inc.
Herman Paul I.
Smith Marlin R.
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