US 11,692,127 B2
Method and materials for hydraulic fracturing with delayed crosslinking of gelling agents
Jeffrey C. Dawson, Conroe, TX (US); and Xiyuan Chen, The Woodlands, TX (US)
Assigned to Independence Oilfield Chemicals, LLC, The Woodlands, TX (US)
Filed by Independence Oilfield Chemicals, LLC, The Woodlands, TX (US)
Filed on May 21, 2021, as Appl. No. 17/327,396.
Application 17/327,396 is a division of application No. 16/172,466, filed on Oct. 26, 2018, granted, now 11,015,422.
Application 16/172,466 is a division of application No. 14/839,927, filed on Aug. 29, 2015, granted, now 10,113,405.
Claims priority of provisional application 62/211,435, filed on Aug. 28, 2015.
Claims priority of provisional application 62/043,795, filed on Aug. 29, 2014.
Prior Publication US 2021/0277758 A1, Sep. 9, 2021
Int. Cl. C09K 8/68 (2006.01); C09K 8/584 (2006.01); C09K 8/64 (2006.01); C09K 8/588 (2006.01); E21B 43/26 (2006.01); C09K 8/60 (2006.01); C09K 8/82 (2006.01); C09K 8/90 (2006.01)
CPC C09K 8/685 (2013.01) [C09K 8/584 (2013.01); C09K 8/588 (2013.01); C09K 8/602 (2013.01); C09K 8/64 (2013.01); C09K 8/82 (2013.01); C09K 8/90 (2013.01); E21B 43/26 (2013.01)] 22 Claims
 
1. A non-aqueous liquid immiscible in water comprising:
(i) a non-polar hydrocarbon oil;
(ii) an oil-wetting surface active material selected from the group consisting of sorbitan esters, ethoxylated sorbitan esters, alkoxylated glycerides and alkylene oxide adducts of a C6-C30 alcohol or phenol or a mixture thereof;
(iii) an organophilic clay;
(iv) a crosslinking agent of a borate ion source; and
(v) optionally, a clay activator.