Cementing methods using dry cementitious materials having improved flow properties

A method of cementing an oil or gas well comprising the steps of:

• dry-blending a particulate flow enhancing additive with one or more dry particulate cementitious materials, said additive being comprised of a particulate solid material carrying a flow inducing polar chemical selected from the group consisting of polar molecule producing acids, their salts and acid anhydrides;
• forming a pumpable slurry using said one or more dry particulate cementitious materials having said particulate flow enhancing additive blended therewith;
• pumping the slurry into the well;
• and
• allowing the slurry to solidify.

A method of cementing in a subterranean formation penetrated by a well bore comprising the steps of:

• dry-blending precipitated silica powder carrying glacial acetic acid thereon with one or more dry particulate cementitious materials selected from the group consisting of hydraulic cements, slag, fumed silica, fly ash and mixtures thereof;
• forming a pumpable slurry using said one or more dry particulate cementitious materials blended with said precipitated silica powder having glacial acetic acid adsorbed thereon;
• pumping the slurry into the well bore;
• and
• allowing the slurry to solidify within the subterranean formation.

A method of cementing comprising the steps of:

• dry-blending a particulate flow enhancing additive with one or more dry particulate cementitious materials, said additive comprising a particulate solid material carrying a flow inducing chemical selected from the group consisting of polar molecule producing acids, their salts and acid anhydrides;
• forming a pumpable slurry using said one or more dry particulate cementitious materials having said particulate flow enhancing additive blended therewith;
• pumping the slurry;
• and
• allowing the slurry to solidify.

A method of cementing comprising the steps of:

• providing a dry particulate cementitious material having a flow enhancing additive blended therewith, said additive comprising a particulate solid material and a flow inducing chemical selected from the group consisting of polar molecule producing acids, their salts and acid anhydrides;
• forming a pumpable slurry using said cementitious material;
• pumping the slurry;
• and
• allowing the slurry to solidify.