Release of hydrochloric acid, hydrofluoric acid and fluoroboric acid into a well may be controlled by introducing into the well an aqueous fluid containing ammonium chloride, ammonium bifluoride, ammonium fluoroborate, ammonium tetrafluoroborate or a mixture thereof and a breaker. After being introduced into the well, the ammonium salt reacts with the breaker and the acid is released into the well.

Release of hydrochloric acid, hydrofluoric acid and fluoroboric acid into a well may be controlled by introducing into the well an aqueous fluid containing ammonium chloride, ammonium bifluoride, ammonium fluoroborate, ammonium tetrafluoroborate or a mixture thereof and a breaker. After being introduced into the well, the ammonium salt reacts with the breaker and the acid is released into the well.

The invention relates to the use of a sleeve (9) installed in a liner or casing (1) prior to a cementing operation. Completion equipment in the liner/casing creates an irregular inner profile which can cause cement to get trapped. A wiper dart (3) passed down the casing/liner (1) may have difficulty removing all residual cement (5). By using a sleeve or insert (8) in the liner/casing (1), a smooth inner profile (9) may be created which can be cleaned relatively easily by a wiper dart. Once cementing and cleaning are complete, the sleeve (9) may be removed by wellbore fluid or acid if it is made from a dissolvable material such as aluminum or magnesium.

A completion/stimulation/production fluid and injection mixture blend is disclosed. The blend may include an aqueous fluid, a polymer system and an injection mixture that includes a polyol, a natural sugar, an artificial sugar, or a combination thereof.

A completion/stimulation/production fluid and injection mixture blend is disclosed. The blend may include an aqueous fluid, a polymer system and an injection mixture that includes a polyol, a natural sugar, an artificial sugar, or a combination thereof.

A method of treating a pipeline is performed by selecting a colloidal particle dispersion having inorganic nanoparticles with an average particle size of from 500 nm or less that exhibit properties of Brownian motion that facilitate penetration of solid deposits on interior surfaces of a pipeline. A treatment composition comprising the colloidal particle dispersion is introduced into an interior of a pipeline by at least one of (A) introducing a batch amount of the treatment composition in a selected volume into the interior of the pipeline, and (B) continuously introducing the treatment composition at a selected rate into the interior of the interior of the pipeline. The composition is allowed to act upon the surfaces and materials adhering to the surfaces of the interior of the pipeline.

A method of treating a pipeline is performed by selecting a colloidal particle dispersion having inorganic nanoparticles with an average particle size of from 500 nm or less that exhibit properties of Brownian motion that facilitate penetration of solid deposits on interior surfaces of a pipeline. A treatment composition comprising the colloidal particle dispersion is introduced into an interior of a pipeline by at least one of (A) introducing a batch amount of the treatment composition in a selected volume into the interior of the pipeline, and (B) continuously introducing the treatment composition at a selected rate into the interior of the interior of the pipeline. The composition is allowed to act upon the surfaces and materials adhering to the surfaces of the interior of the pipeline.

A method is disclosed that includes introducing one or more dual function inhibitor compounds through an umbilical into a deepwater environment such that the one or more dual function inhibitor compounds are introduced into a fluid in the deepwater environment. The dual function inhibitor is a corrosion inhibitor and a hydrate inhibitor.

A method is disclosed that includes introducing one or more dual function inhibitor compounds through an umbilical into a deepwater environment such that the one or more dual function inhibitor compounds are introduced into a fluid in the deepwater environment. The dual function inhibitor is a corrosion inhibitor and a hydrate inhibitor.

An inhibition corrosion package for use with an acidic composition, where the package comprises a terpene component; a propargyl alcohol or derivative thereof; at least one amphoteric surfactant; and a solvent. Also disclosed are acidic compositions combining the corrosion inhibition package according to a preferred embodiment of the present invention for use in various industrial operations including but not limited to oil and gas operations. Also disclosed are methods of use of such compositions.