Inventors:
Albert Augustus Mullins - Humble TX
Raul Daniel Vega - Houston TX
Assignee:
Offshore Energy Services, Inc. - Broussard LA
International Classification:
E21B 1916
Abstract:
A mudsaver valve having a large flow capacity is described to keep fluid from spilling when the apparatus is removed from the tubular. This mudsaver valve also provides for pumping of fluid into the tubular or flow of fluid from the tubular to the mud system prior to removing the apparatus from the tubular. In these embodiments, the apparatus can be placed in threaded sealing contact with the tubular and can incorporate a safety valve that can be manually closed in the event of a well kick.