	US 11,884,870 B2
	Use of a process fluid with an environmentally compatible biostabilizer in a geothermal borehole
Florian Emerstorfer, Vienna (AT); Markus Omann, Vienna (AT); Johann Marihart, Limberg (AT); and Marnik Michel Wastyn, Schwechat (AT)
Assigned to AGRANA BETEILIGUNGS-AKTIENGESELLSCHAFT, Vienna (AT)
Filed by AGRANA BETEILIGUNGS-AKTIENGESELLSCHAFT, Vienna (AT)
Filed on Apr. 19, 2021, as Appl. No. 17/234,661.
Application 17/234,661 is a division of application No. 16/062,510, previously published as PCT/EP2016/082552, filed on Dec. 23, 2016.
Claims priority of application No. 15202340 (EP), filed on Dec. 23, 2015.
Prior Publication US 2021/0238466 A1, Aug. 5, 2021
Int. Cl. C09K 8/035 (2006.01); C09K 8/60 (2006.01); A01N 35/06 (2006.01); A01N 65/08 (2009.01); F24T 10/20 (2018.01)

CPC C09K 8/035 (2013.01) [A01N 35/06 (2013.01); A01N 65/08 (2013.01); C09K 8/605 (2013.01); F24T 10/20 (2018.05); Y02E 10/10 (2013.01)]

18 Claims

1. A method for reducing microorganisms within a geothermal borehole, comprising:

providing water having a hardness of at most 20° dH (German hardness), adding an environmentally compatible biostabiliser to the water to form a process fluid,

pumping the process fluid into the geothermal borehole, wherein the environmentally compatible biostabiliser comprises at least one organic acid or alcohol thereof and the at least one organic acid is selected from the group consisting of hop acids; and the process fluid has a hardness of at most 20° dH (German hardness).