Patent ID: 11879299
Assignee: G&H DIVERSIFIED MANUFACTURING LP
Field: Civil engineering (Other fields)
Classification: CPC E | IPC E

Claim 20:
21. A method for installing a casing string in a wellbore, the method comprising:
(a) coupling together a plurality of casing joints end-to-end to form a casing string at the surface of the wellbore;
(b) running the casing string into the wellbore towards a predefined final position in the wellbore;
(c) coupling a dissolvable barrier assembly to the casing string as the casing string is run into the wellbore, whereby the dissolvable barrier assembly fluidically isolates an open passage of the casing string into an uphole chamber extending uphole from the dissolvable barrier assembly to the surface and a downhole chamber extending downhole from the dissolvable barrier assembly towards a terminal end of the casing string;
(d) adding a fluid to the uphole chamber of the casing string such that the uphole fluid contacts an uphole surface of a barrier of the barrier assembly whereby at least a portion of the uphole surface corrodes at a first corrosion rate;
(e) severing a shear member of the dissolvable barrier assembly to disconnect the barrier of the dissolvable barrier assembly from the casing string whereby fluid communication is established between the uphole chamber and the downhole chamber of the casing string;
(f) contacting a downhole surface of the barrier that is opposite the uphole surface with the uphole fluid whereby at least a portion of the downhole surface corrodes at a second corrosion rate that is greater than the first corrosion rate; and
(g) dissolving both the barrier of the dissolvable barrier assembly and a holder of the dissolvable barrier assembly, wherein the holder comprises an exterior having a first portion and a second portion each exposed to fluids in the casing string with the barrier coupled to the holder, wherein the second portion is configured to corrode at a greater rate than the first portion when the holder is in contact with the uphole fluid.