Saudi Arabian Oil Company

King Fahd University of Petroleum and Minerals

Khalid Majnouni

Shaikh Asrof Ali

Mohammed Abdulmajeed Al-Daous

Abdullah Raddad Al-Malki

Mohamed Elanany

Manal Al-Eid

Hassan Ali Al-Ajwad

Rashed Alessa

Megat A Rithauddeen

Shadi Adel

Abdullah Al-Malki

Copolymers having General Formula (I):  in which Rand Rare chosen from divalent C-Caliphatic groups and divalent C-Cheteroaliphatic groups, optionally substituted with one or more C-Caliphatic groups, heteroatoms independently chosen from O, N, and S, or combinations thereof, where the divalent C-Cheteroaliphatic groups of Rand Rinclude one or two heteroatoms independently chosen from O, N, and S, and the maximum number of heteroatoms in Ror Ris two, Ris chosen from Qand Q, x is a molar fraction range chosen from 0.1 to 0.9, y is a molar fraction range chosen from 0.1 to 0.9, and z is a molar fraction range chosen from 0 to 0.8, where the summation of x, y, and z equals 1. Methods for inhibiting formation of clathrate hydrates include contacting a fluid with at least one copolymer of General Formula (I).

Acryloyl-based copolymers, terpolymers, and use as hydrate inhibitors

Copolymers having General Formula (I): in which Ris chosen from divalent C-Caliphatic groups and divalent C-Cheteroaliphatic groups, optionally substituted with one or more C-Caliphatic groups, heteroatoms independently chosen from O, N, and S, or combinations thereof, where: the divalent C-Cheteroaliphatic groups include one or two heteroatoms independently chosen from O, N, and S, and the maximum number of heteroatoms in Ris two; x is a molar fraction range chosen from 0.05 to 0.95; and y is a molar fraction range chosen from 0.05 to 0.95, where the summation of x and y equals 1. Methods for inhibiting formation of clathrate hydrates in a fluid capable of forming the clathrate hydrates. The methods include contacting the fluid with at least one copolymer of General Formula (I) under conditions suitable for forming the clathrate hydrates.

Succinimide-based copolymers and use as hydrate inhibitors

Copolymers having General Formula (I): in which Rand Rare chosen from divalent C-Caliphatic groups and divalent C-Cheteroaliphatic groups, optionally substituted with one or more C-Caliphatic groups, heteroatoms independently chosen from O, N, and S, or combination thereof, where the divalent C-Cheteroaliphatic groups of Rand Rinclude one or two heteroatoms independently chosen from O, N, and S, and the maximum number of heteroatoms in Ror Ris two, Ris chosen from Qand Q, x is a molar fraction range chosen from 0.1 to 0.9, y is a molar fraction range chosen from 0.1 to 0.9, and z is a molar fraction range chosen from 0 to 0.8, where the summation of x, y, and z equals 1. Methods for inhibiting formation of clathrate hydrates include contacting a fluid with at least one copolymer of General Formula (I).

Copolymers having General Formula (I): in which R, R, and Rare chosen from Cto Caliphatic groups, Ris chosen from divalent Cto Clinear aliphatic groups and divalent Cto Clinear heteroaliphatic groups, optionally substituted with one or more C-Clinear aliphatic groups, C-Cbranched aliphatic groups, or combination thereof, R, R, and Rare each independently chosen from methyl or hydrogen, x is chosen from 0 to 0.8, y is chosen from 0 to 0.8, when y is 0, x is greater than 0, and when x is 0, y is greater than 0, and z is chosen from 0.1 to 0.9. The summation of x, y, and z equals 1. Methods for inhibiting formation of clathrate hydrates in a fluid capable of forming the clathrate hydrates, including contacting the fluid with at least one copolymer of General Formula (I).

Acrylamide-based copolymers, terpolymers, and use as hydrate inhibitors

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Dhahran, Saudi Arabia

Khalid Majnouni