Patent ID: 11898097
Assignee: DORF KETAL CHEMICALS FZE
Field: Civil engineering (Other fields)
Classification: CPC C  E | IPC C  E

Claim 18:
19. The use of an aqueous modified acid composition in an oil industry activity, said composition comprising:
HCl;
an amino acid; and
an alkanolamine;
wherein the HCl: alkanolamine/amino acid are present in a molar ratio of not more than 15:1,
wherein the amino acid is selected from the group consisting of: lysine, glycine, valine, arginine, histidine, methionine and combinations thereof;
wherein the aqueous modified acid composition has a pH of less than 1; and
wherein the use comprises an activity selected from the group consisting of: stimulate formations; assist in reducing breakdown pressures during downhole pumping operations; treat wellbore filter cake post drilling operations; assist in freeing stuck pipe; descale pipelines and/or production wells; increase injectivity of injection wells; lower the pH of a fluid; remove undesirable scale on a surface selected from the group consisting of: equipment, wells and related equipment and facilities; fracture wells; complete matrix stimulations; conduct annular and bullhead squeezes & soaks; pickle tubing, pipe and/or coiled tubing; increase effective permeability of formations; reduce or remove wellbore damage; clean perforations; and solubilize limestone, dolomite, calcite and combinations thereof.