Patent ID: 11873442
Assignee: AGRANA BETEILIGUNGS-AKTIENGESELLSCHAFT
Field: Basic materials chemistry (Chemistry)
Classification: CPC C  A  F  Y | IPC A  C  F

Claim 20:
21. A process for preparation of a process fluid for a geothermal borehole, the process fluid comprising:
an environmentally compatible biostabiliser adapted for use in the process fluid to reduce microorganisms within the geothermal borehole, the biostabiliser comprising at least one resin acid;
wherein the process fluid further comprises clay minerals, water, a defoamer, and a water softener;
wherein the process fluid is at most 20° dH (German Hardness), and the biostabiliser is dissolved in the process fluid;
the process comprising adding resin acids to water or a water-containing portion of the process fluid; and
the process further comprising adding clay minerals and the defoamer to obtain the process fluid.