BOTTOM PLUG FOR FORMING A MONO DIAMETER WELLBORE CASING

摘要

A bottom plug and a method of using a bottom plug for forming a mono diameter wellbore casing is provided that includes an expandable packer initially attached below an expansion device. A packer setting mechanism is coupled between the expansion device and the packer for expanding a packer and sealingly setting it in an expanded portion of the wellbore casing. A release mechanism is coupled between the expansion device and the packer for releasing packer from the expansion device. Fluid is pumped into the casing between the cone and the packer to force the expansion device into and through an unexpanded portion of casing, thereby expanding the casing.