US 12,241,320 B2
Systems and methods for preventing corrosion of drill equipment due to drilling fluid
Ove Stavo, Houston, TX (US)
Assigned to Transocean Sedco Forex Ventures Limited, Hamilton (BM)
Appl. No. 18/031,709
Filed by TRANSOCEAN SERVICES AS, Rogaland (NO)
PCT Filed Oct. 13, 2021, PCT No. PCT/EP2021/078356
§ 371(c)(1), (2) Date Apr. 13, 2023,
PCT Pub. No. WO2022/079120, PCT Pub. Date Apr. 21, 2022.
Claims priority of provisional application 63/090,978, filed on Oct. 13, 2020.
Prior Publication US 2023/0392459 A1, Dec. 7, 2023
Int. Cl. E21B 21/06 (2006.01); B01D 19/00 (2006.01); E21B 41/02 (2006.01)
CPC E21B 21/067 (2013.01) [B01D 19/0005 (2013.01); B01D 19/0042 (2013.01); B01D 19/0063 (2013.01); E21B 41/02 (2013.01)] 27 Claims
OG exemplary drawing
 
1. A method of removing oxygen from a drilling fluid, the method comprising:
pumping the drilling fluid into a first inlet of a mixer, the drilling fluid flowing into the mixer from the first inlet in a first direction;
pumping a gas including nitrogen into a second inlet of the mixer to mix the gas with the drilling fluid, the gas flowing into the mixer from the second inlet in a second direction substantially opposite from the first direction, thereby permitting mass transfer of the oxygen from the drilling fluid to the gas to produce a deoxygenated drilling fluid; and
discharging the deoxygenated drilling fluid from an outlet of the mixer.