Apparatus for stabbing and threading a safety valve into a well

Details Apparatus for stabbing and threading a safety valve into a well Apparatus for stabbing and threading a safety valve into a well

1982-08-16

1984-04-17

Purser, Ernest R.

Wells

Above ground apparatus

With assembly or disassembly means

137315, 29237, E21B 1916

Patent

active

044428928

ABSTRACT:
In accordance with an illustrative embodiment of the present invention, an apparatus for stabbing and threading a safety valve into a well pipe to prevent upward flow comprises a tubular canister rotably mounted on a carriage assembly that is slidably mounted on an upstanding frame. The lower end of the frame has a swivel mounting to a bracket that is attached to the side of an elevator-type clamp means by which the apparatus is clamped onto the upper end portion of the pipe. With the canister pivoted into position over the pipe, a gear drive is operated by a hand wheel to cause the canister to be rotated and simultaneously lowered toward the pipe whereby a safety valve mounted inside the canister is automatically threaded into the upper end of the pipe and can be closed to shut off upward flow.

REFERENCES:
patent: 1831878 (1931-11-01), Myracle
patent: 3505913 (1970-04-01), Dickmann et al.
patent: 3625282 (1971-12-01), Bridges et al.
patent: 3877529 (1975-04-01), Litchfield
patent: 4026354 (1977-05-01), Burrow
patent: 4291762 (1981-09-01), Gudgel

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