Patent ID: 8672030

Claim:
A method for cementing a tubular conveyance string in a wellbore traversing a subterranean formation, comprising: drilling the wellbore with a mud motor supported on the tubular conveyance string and forming an annulus therebetween, the tubular conveyance string having a bore and two or more burst disks fit to the string at or uphole of the mud motor, each of the two or more burst disks having a cap spaced radially outward from the burst disk for forming a chamber therebetween, the chamber being maintained at a substantially fixed and known pressure, the two or more burst disks having a same threshold pressure at which the two or more burst disks rupture; abandoning the mud motor downhole; pumping cement downhole in the bore of the conveyance string; pressuring the bore to the threshold pressure for rupturing the two or more burst disks for forming two or more open ports therethrough; and continuing to pump cement downhole in the bore of the conveyance string and through the two or more open ports to the annulus.