US 12,454,639 B2
Emulsifier for synthetic-based mud, process for preparation, and drilling method
Dimitri M. Khramov, Katy, TX (US); and Evgeny Borisovich Barmatov, Cambridge (GB)
Assigned to Schlumberger Technology Corporation, Sugar Land, TX (US)
Appl. No. 18/028,283
Filed by Schlumberger Technology Corporation, Sugar Land, TX (US)
PCT Filed Jan. 29, 2021, PCT No. PCT/US2021/015712
§ 371(c)(1), (2) Date Mar. 24, 2023,
PCT Pub. No. WO2022/066205, PCT Pub. Date Mar. 31, 2022.
Claims priority of provisional application 63/082,723, filed on Sep. 24, 2020.
Prior Publication US 2023/0374365 A1, Nov. 23, 2023
Int. Cl. C09K 8/36 (2006.01)
CPC C09K 8/36 (2013.01) 24 Claims
OG exemplary drawing
 
1. An emulsifier composition, comprising:
an iso-amidoamine prepared by a process comprising the steps of:
(1) reacting a polyalkyleneamine having from 4 to 30 carbon atoms, at least one secondary amine group, and at least two primary amine groups, with a monocarboxylic acid having from 4 to 30 carbon atoms or an acyl halide or hydrocarbyl ester thereof, to form a first reaction product comprising a polyalkyleneamidoamine derivative of the polyalkyleneamine;
(2) reacting the first reaction product from step (1) with a dicarboxylic acid selected from maleic acid, fumaric acid, maleic anhydride, and combinations thereof to form a second reaction product an acid-substituted amidoamine; and
(3) heat treating the maleated amidoamine from step (2) at a temperature and for a time sufficient to form a heat treatment product comprising an isomer of the acid-substituted amidoamine, wherein the heat treatment product has an acid number less than an acid number of the second reaction product;
about 30-80 wt % of the heat treatment product from step (3); and
about 70-20 wt % of one or more other components,
wherein the one or more other components comprise a hydrocarbyl ethoxylate having the formula RO—(CH2CH2O)nH wherein R is a C5-22 (C16-22) hydrocarbyl group and n is an integer in the range of 2 to 30.