US 12,134,734 B2
Corrosion inhibitor with improved performance at high temperatures
Paul Barnes, Aberdeen (GB); Tore Nordvik, Stavanger (NO); Trevor Lloyd Hughes, Cambridge (GB); Lynne Patricia Crawford, Harlow (GB); and Evgeny Barmatov, Cambridge (GB)
Assigned to CAMERON INTERNATIONAL CORPORATION, Houston, TX (US)
Filed by Cameron International Corporation, Houston, TX (US)
Filed on Aug. 3, 2023, as Appl. No. 18/364,526.
Application 18/364,526 is a continuation of application No. 17/053,857, granted, now 11,760,918, previously published as PCT/US2019/031226, filed on May 8, 2019.
Claims priority of provisional application 62/669,188, filed on May 9, 2018.
Prior Publication US 2023/0374370 A1, Nov. 23, 2023
This patent is subject to a terminal disclaimer.
Int. Cl. C09K 8/54 (2006.01); C07D 239/04 (2006.01); C23F 11/14 (2006.01); E21B 41/02 (2006.01)
CPC C09K 8/54 (2013.01) [C07D 239/04 (2013.01); C23F 11/149 (2013.01); E21B 41/02 (2013.01); C09K 2208/32 (2013.01)] 19 Claims
OG exemplary drawing
 
1. A composition, comprising:
a corrosion inhibitor comprising a synergist comprising mercaptoethanol and a heterocyclic diamine corrosion inhibitor represented by the formula:

OG Complex Work Unit Chemistry
wherein R1 and R2 are independently selected from hydrogen and a C2-C30 saturated or unsaturated hydrocarbon radical, with the proviso that at least one of R1 and R2 is not hydrogen; R3 is hydrogen or a C1-C30 saturated or unsaturated, aromatic or non-aromatic hydrocarbon radical; and n is 1.