METHOD TO PRESERVE HEAD OF EMERGENCY BLOWING DEEP-WATER OIL AND GAS WELL AND DEVICE FOR ITS REALISATION Russian patent published in 2011 - IPC E21B33/64 E21B34/04 

FIELD: construction.

SUBSTANCE: method is proposed to preserve the head of a damaged deep-water oil producing well by means of isolation from environment through coverage with a device of a sarcophagus type and its inner cavity filling with viscous mortars, and the base is cemented into soil. Besides, according to the invention, the head of the sarcophagus device is preserved with application of kinetic energy of a fountain jet. At the same time the device for preservation of the damaged deep-water oil producing well head, such as a sarcophagus, has a central axial channel that matches the axis of the gusher jet, a plate valve built into the device wall, the configuration of which matches the seat of the valve arranged in the outlet hole of the device. At the same time in the lower part the hollow body of the well head preservation device has facilities for fixation to elements of the well head that survived the accident, at the same time at the outer surface the device is equipped with a channel for supply of heavy fast-hardening mortars inside from the outside, besides, the gate of mortars supply is arranged in its lower bottom part of the hollow body.

EFFECT: reduction of time for preservation of an emergency well head due to arrangement of the bottom site before deep drilling around the well as a preventive anti-accident measure.

2 cl, 1 dwg