Oil well drilling apparatus

Details Oil well drilling apparatus Oil well drilling apparatus

1984-04-12

1985-11-19

Novosad, Stephen J.

Wells

Above ground apparatus

Having structure for converting from one mode of operation...

166 86, 166 95, E21B 3302

Patent

active

045535914

ABSTRACT:
An apparatus for use with an oil well drilling apparatus, including an annular spool interposed permanently between the well blowout preventer stack and the upper bell nipple. The spool receives a plurality of different mandrels, including a test mandrel for testing the seals of the blowout preventers or adapting the drilling apparatus for wireline operations, and a shut-down mandrel for suspending a string of drill pipe within the well casing during a temporary shutdown. The different mandrels are each seated on an internal annular seat in the spool, are each peripherally sealing in the spool above the seat, and are retained by appropriate securing means urging the mandrel against the spool seat.

REFERENCES:
patent: 2178700 (1939-11-01), Penick et al.
patent: 2442548 (1948-06-01), Mueller
patent: 2788073 (1957-04-01), Brown
patent: 2830666 (1958-04-01), Rhodes
patent: 3171674 (1965-03-01), Bickel et al.
patent: 3409084 (1968-11-01), Lawson, Jr. et al.
patent: 4202410 (1980-05-01), Quebe
patent: 4289199 (1981-09-01), McGee

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