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US 4,336,145 AGranted
Liquid gel concentrates and methods of using the same
AssigneeHalliburton Company
InventorJames E. Briscoe
Life of this patent
Estimating the term…
Abstract
A liquid gel concentrate for forming a high viscosity treating fluid is provided which can be premixed and stored before being used. The concentrate is comprised of water, a hydratable polymer which yields viscosity upon hydration and an inhibitor having the property of reversibly reacting with the hydratable polymer in a manner whereby the rate of hydration of the polymer is retarded. Upon the selective reversal of the hydration inhibiting reaction the polymer is hydrated and high viscosity yielded thereby. The concentrate can be utilized directly or it can be diluted with additional water to form a large volume of high viscosity treating fluid.
Claims25
A liquid gel concentrate comprising:
- water;
- hydroxypropyl guar hydratable polymer which yields viscosity upon hydration present in said concentrate in an amount of from about 700 to about 900 lbs/1000 gals. of water;
- sodium hydroxide present in said concentrate in an amount sufficient to produce a concentrate pH in the range of from about 9 to about 14;
- and
- sodium tetraborate inhibitor having the property of reversibly reacting with said hydratable polymer whereby the rate of hydration of said polymer is retarded at one condition to produce a concentrate effective storage life in the range of about 1-90 days and said reaction is reversed at another condition, said inhibitor being present in said concentrate in an amount of from about 6 to about 12 lbs/1000 gals. of water.
2 more elements
A liquid gel concentrate comprising:
- water;
- guar gum hydratable polymer which yields viscosity upon hydration present in said concentrate in an amount in the range of from about 300 lbs/1000 gals. of water to about 1500 lbs/1000 gals. of water;
- a base present in said concentrate in an amount sufficient to produce a concentrate pH in the range of from about 9 to about 13;
- and
- aluminum sulfate inhibitor having the property of reversibly reacting with said hydratable polymer whereby the rate of hydration of said polymer is retarded at one condition to produce a concentrate effective storage life in the range of about 1-90 days and said reaction is reversed at another condition, said inhibitor being present in said concentrate in an amount of about 20 lbs/1000 gals. of water to about 350 lbs/1000 gals. of water.
2 more elements
A liquid gel concentrate comprising:
- water;
- carboxymethyl cellulose hydratable polymer which yields viscosity upon hydration present in said concentrate in an amount in the range of from about 300 lbs/1000 gals. of water to about 3000 lbs/1000 gals. of water;
- and
- aluminum sulfate inhibitor having the property of reversibly reacting with said hydratable polymer whereby the rate of hydration of said polymer is retarded at one condition to produce a concentrate effective storage life of about 1-90 days and said reaction is reversed at another condition, said inhibitor being present in said concentrate in an amount of about 75 lbs/1000 gals. of water to about 750 lbs/1000 gals. of water.
1 more element
A method of forming a high viscosity aqueous treating fluid comprising the steps of:
- forming an inhibited liquid gel concentrate comprised of water, hydroxypropyl guar hydratable polymer which yields viscosity upon hydration present in said concentrate in an amount in the range of from about 300 to about 3000 lbs/1000 gals. of water, a base present in said concentrate in an amount sufficient to produce a concentrate pH in the range of from about 9 to about 14, and sodium tetraborate inhibitor having the property of reversibly reacting with said hydratable polymer whereby the rate of hydration of said polymer is retarded at one condition to produce a concentrate effective storage life of about 1-90 days and said reaction is reversed at another condition, said inhibitor being present in said concentrate in an amount in the range of from about 0.1 lbs. to about 1000 lbs/1000 gals. of water;
- and
- combining an acid with said concentrate to lower the pH thereof to a value below about 9.
A method of forming a high viscosity aqueous treating fluid comprising the steps of:
- forming an inhibited liquid gel concentrate comprised of water, hydroxypropyl guar hydratable polymer which yields viscosity upon hydration present in said concentrate in an amount in the range of from about 300 to about 3000 lbs/1000 gals. of water, sodium hydroxide present in said concentrate in an amount sufficient to produce a concentrate pH in the range of from about 9 to about 14, and sodium tetraboratedecahydrate inhibitor having the property of reversibly reacting with said hydratable polymer whereby the rate of hydration of said polymer is retarded at one condition to produce a concentrate effective storage life of about 1-90 days and said reaction is reversed at another condition, said inhibitor being present in said concentrate in an amount in the range of from about 0.1 lbs. to about 1000 lbs/1000 gals. of water;
- and
- heating said concentrate to a temperature above about 140.degree. F.
A method of forming a high viscosity aqueous treating fluid comprising the steps of:
- forming an inhibited liquid gel concentrate comprised of water, guar gum hydratable polymer which yields viscosity upon hydration present in said concentrate in an amount in the range of from about 300 to about 1500 lbs/1000 gals. of water, sodium hydroxide present in said concentrate in an amount sufficient to produce a concentrate pH in the range of from about 9 to about 14, and aluminum sulfate inhibitor having the property of reversibly reacting with said hydratable polymer whereby the rate of hydration of said polymer is retarded at one condition to produce a concentrate effective storage life of about 1-90 days and said reaction is reversed at another condition, said inhibitor being present in said concentrate in an amount in the range of from about 20 lbs. to about 350 lbs/1000 gals. of water;
- and
- combining an acid with said concentrate to lower the pH thereof to a value below about 9.
A method of forming a high viscosity aqueous treating fluid comprising the steps of:
- forming an inhibited liquid gel concentrate comprised of water, carboxymethylcellulose hydratable polymer which yields viscosity upon hydration present in said concentrate in an amount in the range of from about 300 lbs. to about 3000 lbs/1000 gals. of water and aluminum sulfate inhibitor having the property reversibly reacting with said hydratable polymer whereby the rate of hydration of said polymer is retarded at one condition to produce a concentrate effective storage life of about 1-90 days and said reaction is reversed at another condition, said inhibitor being present in said concentrate in an amount in the range of from about 75 lbs. to about 750 lbs/1000 gals. of water;
- and
- combining a base with said concentrate to raise the pH of said concentrate to a value above about 8.
Dependencies are inferred from the claim text.