E.i. Dupont De Nemours and Company

Dorf Ketal Speciality Catalysts, LLC

Other

Dork Ketal Speciality Catalysts, LLC

Dorf Ketal Specialty Catalysts, LLC

Donald Edward Putzig

Edward Francis McBride

Kenneth C Smeltz

James Arthur Trainham

Hiep Quang Do

Jiwen F Duan

Heiner Schulte

Hermann Ludwig Jaeger

Joseph V Kurian

Yuanfeng Liang

Frederick K Mallon

Timothy M Davis

Robin Nikolas Greene

Douglas J Adelman

Peter Jernakoff

William G Peet

Kathy Lynn Fortmann

Clive Alexander Hamilton

Andrea Clare Smith

A solid zirconium cross-linking agent and use in a cross-linking composition in oil field applications such as hydraulic fracturing and plugging of permeable zones. The zirconium cross-linking agent is prepared by a process comprising contacting a zirconium complex with an alkanolamine and water at particular mole ratios of alkanolamine and water to zirconium.

Solid zirconium-based cross-linking agent and use in oil field applications

A solid zirconium cross-linking agent is prepared comprising zirconium and hydroxyalkylated ethylene diamine ligand. Use of the cross-linking agent in compositions for oil field applications such as hydraulic fracturing and plugging of permeable zones is also disclosed.

A cross-linking composition comprising (a) an aqueous liquid; (b) a pH buffer; (c) a cross-linkable organic polymer; and (d) a solution of a zirconium cross-linking agent comprising the product of contacting a zirconium complex with an alkanolamine and ethylene glycol wherein the mole ratio of alkanolamine to zirconium is 2:1 to 4:1 and the mole ratio of ethylene glycol to zirconium is 1:1 to 10:1. Optionally, water, hydroxyalkylated ethylenediamine, or both are added to the zirconium complex. The cross-linking composition of this invention is useful in oil field applications, for example, for hydraulically fracturing a subterranean formation and for plugging permeable zones or leaks in a subterranean formation.

Zirconium-based cross-linking composition for use with high pH polymer solutions

A clear, stable, salt-free solution of a 1:1 molar complex of zirconium and N,N,N',N&#x2032;-tetrakis-(2-hydroxypropyl)ethylene diamine. The solution can be used in a cross-linking composition comprising a cross-linkable organic polymer for oil field applications such as fluid fracturing and plugging permeable zones in subterranean formations.

Stable solutions of zirconium hydroxyalkylethylene diamine complex and use in oil field applications

A cross-linking composition which comprises (a) an aqueous liquid, (b) a cross-linkable organic polymer, and (c) a solution comprising a zirconium cross-linking agent which comprises a zirconium complex having a molar ratio of 1:2 to 1:4 of zirconium to triethanolamine and a molar ratio of 1:0.1 to 1:1 of zirconium to N,N,N',N&#x2032;-tetrakis-(2-hydroxypropyl)-ethylene diamine. The composition can be used in oil field applications for hydraulic fracturing and plugging of permeable zones and leaks in subterranean formations.

Zirconium-based cross-linker compositions and their use in high pH oil field applications

A process to prepare a stable solution of a borozirconate complex is disclosed and use of the solution in oil field applications such as hydraulic fracturing and plugging of permeable zones. The process comprises contacting zirconium complex with alkanolamine, then glycerol and water, then with a boron compound. The solution is particularly suitable for use in a cross-linking composition in hydraulic fracturing and plugging of permeable zones of subterranean formations at temperatures of 275&#xb0; F. (135&#xb0; C.) and higher in the formation.

Process to prepare borozirconate solution and use as cross-linker in hydraulic fracturing fluids

A method for plugging a permeable zone or leak in a subterranean formation comprises introducing into the formation a cross-linkable organic polymer and a cross-linking composition which comprises a zirconium triethanolamine complex, a tetra(hydroxyalkyl)ethylenediamine, water and optionally, a polyol. The method can be used for cross-linking organic polymers over a wide range of pH. By varying the composition and optionally adding a delay agent, the method provides flexibility in rate of cross-linking.

Permeable zone and leak plugging using cross-linking composition comprising zirconium triethanolamine complex

A process to prepare a stable solution of a borozirconate complex is disclosed and use of the solution in oil field applications such as hydraulic fracturing and plugging of permeable zones. The process comprises contacting zirconium complex with alkanolamine, then water and optionally and preferably a hydroxyalkylene diamine, then with a boron compound. The solution is particularly suitable for use in a cross-linking composition in hydraulic fracturing and plugging of permeable zones of subterranean formations at temperatures of 275&#xb0; F. (135&#xb0; C.) and higher in the formation.

Process to prepare borozirconate solution and use as a cross-linker in hydraulic fracturing fluids

A zirconium cross-linking agent produced by a process which comprises contacting a zirconium triethanolamine complex with a mixture of polyols, which mixture comprises a hydroxyalkylated diamine and a hydrocarbon polyol. There is further provided a cross-linking composition which comprises (a) an aqueous liquid, (b) a cross-linkable organic polymer, and (c) a solution of a zirconium cross-linking agent which is produced by a process which comprises contacting a zirconium triethanolamine complex having a molar ratio of 1:2 to 1:5 of zirconium to triethanolamine with a mixture of polyols, which mixture comprises a hydroxyalkylated diamine and a hydrocarbon polyol wherein the molar ratio of zirconium to hydroxyalkylated diamine is 1:0.5 to 1:1 and the molar ratio of zirconium to hydrocarbon polyol is 1:0.5 to 1:1.5. The composition can be used in oil field applications for hydraulic fracturing and plugging of permeable zones and leaks in subterranean formations.

Zirconium-base cross-linker compositions and their use in high pH oil field applications

A process to prepare a solution of zirconium-hydroxyalkylated diamine-lactic acid complex is disclosed and use of the solution in oil field applications such as hydraulic fracturing and plugging of permeable zones. The process comprises contacting an alcohol solution of a zirconium complex with an hydroxyalkylated diamine, then with lactic acid to produce a solution of zirconium-hydroxyalkylated diamine-lactic acid complex. The solution is particularly suitable for use in a cross-linking composition in hydraulic fracturing and plugging of permeable zones of subterranean formations at pH of 10 or greater and at temperatures of 275&#xb0; F. (135&#xb0; C.) and higher in the formation.

Zirconium-hydroxy alkylated amine-hydroxy carboxylic acid cross-linking composition for use with high pH polymer solutions

A process to prepare a stable solution of a borozirconate complex is disclosed and use of the solution in oil field applications such as hydraulic fracturing and plugging of permeable zones. The process comprises contacting zirconium complex with a first alkanolamine, then water and optionally hydroxyalkylene diamine, then with a solution of a boron compound and a second alkanolamine. The solution is particularly suitable for use in a cross-linking composition in hydraulic fracturing and plugging of permeable zones of subterranean formations at temperatures of 275&#xb0; F. (135&#xb0; C.) and higher in the formation.

Process to prepare borozirconate solution and use a cross-linker in hydraulic fracturing fluids

A process to prepare a solution of zirconium-alkanolamine-hydroxycarboxylic acid complex is disclosed and use of the solution in oil field applications such as hydraulic fracturing and plugging of permeable zones. The process comprises contacting an alcohol solution of a zirconium complex with an alkanolamine, then with an &#x3b1;-hydroxycarboxylic acid to produce a solution of zirconium-alkanolamine-hydroxycarboxylic acid complex. The solution is particularly suitable for use in a cross-linking composition in hydraulic fracturing and plugging of permeable zones of subterranean formations at temperatures of 275&#xb0; F. (135&#xb0; C.) and higher in the formation.

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Newark, DE, United States of America

Donald Edward Putzig