Casing attachment system for attenuating annular pressure buildup

A method of placing compressible particles within a wellbore, comprising:

• running a first string of casing into a wellbore, the first string of casing extending into a subsurface to a first depth;
• running a second string of casing into the wellbore, the second string of casing extending into the subsurface to a depth that is greater than the first depth, and wherein the first string of casing surrounds an upper portion of the second string of casing forming an annular region;
• providing a series of packings of compressible material, with each packing being fixed at a selected depth within the annular region, wherein:
• each packing of compressible material is affixed to an outer diameter of the second string of casing or is threadedly placed in series with the second string of casing,
• the compressible material comprises a plurality of carbonaceous particles,
• the carbonaceous particles are designed to absorb pressure in response to thermal expansion of wellbore fluids within the annular region during the production of hydrocarbon fluids from the wellbore;
• the carbonaceous particles having a resiliency between exceeding 100% to 120%;
• and
• the compressible material is inert to heated wellbore fluids;
• placing a column of cement around the second string of casing below the first depth;
• and
• placing a wellhead over the wellbore, thereby forming a trapped annulus in the wellbore over the annular region.

A packing of compressible particles, comprising:

• a plurality of particles residing within a matrix and defining a cylindrical body having an upper end and a lower end;
• and wherein:
• the plurality of particles are held together by means of a binder, forming a sheet that is folded to form the cylindrical body, wherein the sheet is inert to heated wellbore fluids;
• the plurality of particles together have a reversible volumetric contraction of greater than or equal to (≥) 3% at pressures progressing from 3,000 pounds per square inch (psi) up to 10,000 psi,
• the plurality of particles having a resiliency between exceeding 100% to 120%;
• the cylindrical body is between 5 and 35 feet in length, and
• the cylindrical body is frictionally or adhesively secured to an outer diameter of a pipe joint.