초록 ▼

Methods of controlling the rates of release of chemical additives into treating fluids are provided by the present invention. The methods are basically comprised of causing a chemical additive in liquid form to be absorbed into a porous solid material whereby the chemical additive is encapsulated th

Methods of controlling the rates of release of chemical additives into treating fluids are provided by the present invention. The methods are basically comprised of causing a chemical additive in liquid form to be absorbed into a porous solid material whereby the chemical additive is encapsulated thereby and when the resulting encapsulated chemical additive is combined with the treating fluid, the chemical additive is slowly released into the treating fluid. After being encapsulated, the liquid chemical additive is combined with the treating fluid and the treating fluid containing the encapsulated chemical additive is introduced into a well.

대표청구항 ▼

[What is claimed is:] [1.](a) causing said liquid chemical additive to be absorbed into a porous solid material whereby said liquid chemical is encapsulated thereby and when the resulting encapsulated liquid chemical additive is combined with said treating fluid said liquid chemical additive is slow

[What is claimed is:] [1.](a) causing said liquid chemical additive to be absorbed into a porous solid material whereby said liquid chemical is encapsulated thereby and when the resulting encapsulated liquid chemical additive is combined with said treating fluid said liquid chemical additive is slowly released into said treating fluid, said porous solid material being a particulate material which remains dry and free flowing after absorbing a liquid chemical additive therein selected from the group consisting of silica, alumina, metal salts of alumino-silicates, clays, hydrotalcite, styrene-divinylbenzene based materials, cross-linked polyalkylacrylate esters and cross-linked modified starches;(b) combining said encapsulated liquid chemical additive with said treating fluid; and(c) introducing said treating fluid containing said encapsulated liquid chemical additive into said well.