Abstract: Improved well fluids that include hollow particles, and methods of using such improved well fluids in subterranean cementing operations are provided. Also provided are methods of cementing, methods of reducing annular pressure, and well fluid compositions. While the compositions and methods of the present invention are useful in a variety of subterranean applications, they may be particularly useful in deepwater offshore cementing operations.

Abstract: A wellbore fluid comprising a carrier fluid and a resilient material, wherein the resilient material reduces in volume upon exposure to a compressive force, and further wherein the resilient material increases in volume upon a decrease in the compressive force.

Abstract: A method of servicing a wellbore, comprising providing a wellbore fluid comprising a carrier fluid and a resilient material, and introducing the wellbore fluid to an annulus, wherein at least a portion of the resilient material reduces in volume to affect the annular pressure.

Abstract: Density-reducing additives comprising low-density particulates, and cement compositions comprising such additives, are provided. In one embodiment, the present invention provides a cement composition comprising: a cement component; a density-reducing additive comprising particulates that comprise an agglomerating material; and a base fluid.

Abstract: Methods of using density-reducing additives comprising low-density particulates in subterranean cementing operations are provided. In one embodiment, the present invention provides a method of cementing comprising: providing a cement composition comprising a cement component, a base fluid, and a density-reducing additive comprising particulates that comprise an agglomerating material; placing the cement composition in a location to be cemented; and allowing the cement composition to set therein.

Abstract: Methods of making a cement composition include combining a liquid additive comprising lightweight beads and fluid with a cement, wherein the liquid additive is substantially absent of a water absorbing material. The liquid additive may further comprise a dispersant. A mass ratio of the fluid to the lightweight beads in the liquid additive may be less than or equal to about 1:1. The liquid additive may be introduced to a delivery pump that supplies water to a cement mixing head for producing a cement slurry. Alternatively, the liquid additive may be introduced to a cement slurry as the slurry is being pumped into a wellbore. Systems for transporting the liquid additive include a recirculating pump for moving the liquid additive from the bottom of a vessel to the top of the vessel, thereby causing floating beads to be mixed down in the liquid additive.

Abstract: In an embodiment, the shelf life of lightweight beads to be used in a cement composition may be extended by combining the lightweight beads with a fluid such as water to inhibit the lightweight beads from forming an agglomeration while they are being stored or transported. In another embodiment, lightweight beads that have already formed an agglomeration may be revitalized for use in a cement composition by adding a fluid such as water to the lightweight beads to reduce a size of the agglomeration. The agglomeration may originally have a width greater than or equal to about 1 inch. Adding the fluid to the lightweight beads may cause at least a portion of the beads to separate from the agglomeration into individual beads having a width of less than or equal to about 200 microns.

Abstract: The present invention relates to improved well fluids that include hollow particles, and to methods of using such improved well fluids in subterranean cementing operations. The present invention provides methods of cementing, methods of reducing annular pressure, and well fluid compositions. While the compositions and methods of the present invention are useful in a variety of subterranean applications, they may be particularly useful in deepwater offshore cementing operations.