Method and apparatus for closing underwater wells

Details Method and apparatus for closing underwater wells Method and apparatus for closing underwater wells

1978-03-02

1979-08-07

Purser, Ernest R.

Wells

Processes

Producing the well

251 1A, 137263, 169 69, E21B 712

Patent

active

041634772

ABSTRACT:
A method and apparatus is shown and described for remotely closing a well(s) without the possibility of accidental closure. The method and apparatus will have a significant application to underwater wells. A point of activation of a gas generator is remotely located away from the well to avoid debris that may fall at or near the well. A diver or technician brings the means for activating the gas generator to the activation point of the gas generator. Upon activation, pressure generated by the gas generator is transferred by appropriate conduit means to well closure equipment which may include a crimping device, a "U" type blowout preventer, blind rams or any combination thereof. The faces of rams used to pinch concentrical strings of pipe may be shaped to seal the outer strings of pipe as well as inner strings.

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patent: 3400730 (1968-09-01), Anderson
patent: 3405387 (1968-10-01), Koomey et al.
patent: 3621911 (1971-11-01), Baker et al.
patent: 3720260 (1973-03-01), Duck et al.
patent: 3740017 (1973-06-01), Pogonowski
patent: 3782458 (1974-01-01), Slack

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