Patent ID: 9631459
Date: 2017-04-25
CPC Classifications: E21B

Claim:
1. A method of performing a wellbore intervention operation to reduce an uncontrolled flow of wellbore blowout fluids from a subterranean wellbore, the method comprising: providing a flow control device, the flow control device engaged proximate a top end of a wellbore conduit that includes a wellbore throughbore, the flow control device including a primary throughbore coaxially aligned with the wellbore throughbore; providing a control fluid aperture proximate the top end of the wellbore conduit, the control fluid aperture being fluidly connected with the primary throughbore; providing a weighted fluid aperture in the wellbore throughbore at an upstream location in the wellbore throughbore with respect to the control fluid aperture and with respect to the direction of wellbore blowout fluid flow through the wellbore throughbore; introducing a control fluid through the control fluid aperture and into the wellbore throughbore while a wellbore blowout fluid flows from the subterranean formation through the wellbore throughbore at a wellbore blowout fluid flow rate, the control fluid comprising carbon dioxide to form hydrates in the wellbore throughbore, whereby the control fluid is introduced into the wellbore throughbore at a control fluid introduction rate that is at least 25% of the wellbore blowout fluid flow rate from the wellbore throughbore prior to introducing the control fluid into the wellbore throughbore; and introducing a weighted fluid through the weighted fluid aperture and into the wellbore throughbore while pumping the control fluid through the control fluid aperture.