Wells – Above ground apparatus – Central valve or closure and lateral port
Patent
1975-05-05
1977-05-31
Leppink, James A.
Wells
Above ground apparatus
Central valve or closure and lateral port
285DIG13, E21B 3303
Patent
active
040263541
ABSTRACT:
The present invention relates to apparatus for temporary attachment to the top of a conduit string disposed in a well bore whereby an uncontrolled fluid blowout through the conduit string can be shutoff and controlled utilizing the apparatus. The apparatus includes a housing having a central bore disposed therethrough and a side connection formed therein communicating with the bore. A vent is sealingly attached to the top of the housing over the bore and shutoff valve means are disposed in the vent. A tubular member, the upper end of which is rotatably and sealingly disposed within the bore of the housing projects below the bottom of the housing and means are formed on the lower end of the tubular member for sealingly gripping the inside surfaces of the top of the conduit string upon the rotation of the tubular member. Gear means are disposed within the housing and attached to the upper end of the tubular member for rotating the tubular member and a conduit is sealingly connected to the side connection of the housing adapted to be connected to a source of weighted fluid for killing the well. A drive shaft is disposed within the conduit, the forward end of which is operably connected to the gear means, and means for imparting axial rotation to the drive shaft are attached to the conduit and operably connected to the rearward end of the drive shaft.
REFERENCES:
patent: 2070326 (1937-02-01), Weidinger
patent: 2139207 (1938-12-01), Rector
patent: 2897895 (1959-08-01), Ortloff
patent: 2946386 (1960-07-01), Jones
Hessin Robert M.
Leppink James A.
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