Patent ID: 9010435
Filing Date: 2015-04-21
Classification: E21B

Abstract:
1. A method of emergency killing of an underwater well, the method comprising: squeezing a cementing composition, wherein the well section to be cemented and depth of injector installation are preliminarily sized up, based on underwater well condition and pressure therein, fixing an injector on a tank; filling a tank with the cementing composition; placing the injector in a bag made of a flexible material; delivering the injector, the bag and the tank to a sea bottom into proximity of the underwater well; inserting the injector to a target depth into a wellhead of the underwater well and filling the bag with the cementing composition from the tank; and hardening the cementing composition, wherein the injector is held at the target depth in the wellhead by a combined weight of the cementing composition, injector and the tank; and maintaining pressure in the bag while the cementing composition in the bag is hardening.