Patent ID: 8474536
Filing Date: 2013-07-02
Classification: E21B

Abstract:
1. A method for killing of an uncontrolled fountain from an offshore oil well comprising the steps of: a. providing a flow-restricting telescopic rod assembly in a riser tube, said rod assembly comprising individual flow-restricting rods of increasing diameters with a first lower rod being the smallest, said riser tube comprising a lower riser end configured for alignment of the first rod with said well, said lower end of said riser tube is also configured for subsequent sealing connection to said well, b. lowering the first flow-restricting rod into said well through said riser tube so as to reduce a cross-sectional area of said well leading to a reduction of fluid discharge in said uncontrolled fountain, c. attaching additional rods in series to said first rod whereby forming said telescopic rod assembly and lowering thereof into said well, whereby further reducing the cross-sectional area of said well causing a further reduction of fluid discharge in said uncontrolled fountain, d. connecting said lower end of said riser tube to said well once said fluid discharge in said uncontrolled fountain is sufficiently diminished due to presence of said telescopic rod assembly therein, and e. sealing off said well to permanently stop said uncontrolled fountain by pumping cement through an annular space formed between said riser tube and said telescopic rod assembly and into an annular space formed between said well and said telescopic rod assembly.