Controlled swell-rate swellable packer and method

A method of utilizing a controlled swell-rate swellable packer comprising:

• disposing a tubular string comprising a controlled swell-rate swellable packer incorporated therein within a wellbore in a subterranean formation, wherein the controlled swell-rate swellable packer comprises:
• a cylindrical sealing element with an internal bore and a jacket, wherein the sealing element comprises a swellable material, wherein the sealing element is in sealing contact with the tubular string, wherein the sealing element comprises a retention coating layer that prevents the outflow of the swelling material from the sealing element and allows inflow of a swelling agent such that the swelling agent contacts the swellable material, wherein the retention coating layer is between the sealing element and the jacket, wherein the jacket is in sealing contact with at least a portion of the retention coating layer to form a fluid tight seal, wherein the jacket covers a plurality of covered portions of an outer surface of the sealing element, wherein the covered portions are separated by uncovered portions along the sealing element, wherein the retention coating layer covers at least a portion of the uncovered portions along the sealing element, and wherein the jacket is impermeable to a fluid that is configured to cause the sealing element to swell upon contact between the sealing element and the fluid;
• introducing the fluid within the wellbore;
• activating the controlled swell-rate swellable packer such that the sealing element exhibits a radial expansion;
• and
• performing a wellbore servicing operation.