US 12,326,436 B2
Determination of chloride concentration in drilling fluids
Jay Locklear, Houston, TX (US); and Molly Merritt, Tulsa, OK (US)
Assigned to CONOCOPHILLIPS COMPANY, Houston, TX (US)
Filed by CONOCOPHILLIPS COMPANY, Houston, TX (US)
Filed on May 30, 2024, as Appl. No. 18/678,662.
Application 18/678,662 is a continuation of application No. 17/746,077, filed on May 17, 2022, granted, now 12,025,606.
Claims priority of provisional application 63/190,085, filed on May 18, 2021.
Prior Publication US 2024/0310353 A1, Sep. 19, 2024
Int. Cl. G01N 33/28 (2006.01); G01N 27/06 (2006.01)
CPC G01N 33/2823 (2013.01) [G01N 27/06 (2013.01)] 15 Claims
OG exemplary drawing
 
1. A process for measuring the concentration of chloride in drilling fluid, where the process comprises:
a) titrating a sample of drilling fluid against silver nitrate;
b) measuring conductivity of the sample; and
c) determining chloride concentration based on conductivity of the drilling fluid as silver nitrate is progressively added wherein chloride concentration is given by an equivalence point after which conductivity increases as silver nitrate is added.