US4336842A — Method of treating wells using resin-coated parti…

Claim 1

Independent Claim 57 words

A method of treating a subterranean formation surrounding a wellbore which comprises: (a) placing in contact with said formation particles coated with a solid termosetting resin capable of fusing and then curing to an infusible state; and (b) curing said resin in a solution containing an agent capable of lowering the temperature at which said resin fuses.

Claim 2

Independent Claim 57 words

A method of treating a subterranean formation surrounding a wellbore which comprises: (a) placing in contact with said formation particles coated with a solid termosetting resin capable of fusing and then curing to an infusible state; and (b) curing said resin in a solution containing an agent capable of lowering the temperature at which said resin fuses.

Claim 3

Dependent Claim 29 words

The method defined in claim 1 wherein said agent is present in a concentration sufficient to lower the temperature at which said resin fuses by at least 20° F.

Claim 4

Dependent Claim 32 words

The method as defined in claim 1 wherein said solution is an aqueous solution of alcohol, said alcohol being present in a concentration of between about 5 and about 20 volume percent.

Claim 5

Dependent Claim 31 words

The method as defined in claim 1 wherein the solution is an aqueous solution of a nonionic surfactant, said surfactant being present in a concentration of at least one-half volume percent.

Claim 6

Dependent Claim 20 words

The method as defined in claim 4 wherein said surfactant has an HLB number between about 8 and about 18.

Claim 7

Dependent Claim 24 words

The method as defined in claim 5 wherein the surfactant is an ethoxylated secondary alcohol with chain length of 11 to 15 carbon atoms.

Claim 8

Dependent Claim 38 words

The method as defined in claim 1 wherein the solution is an aqueous solution comprising from about 1/2 to about 20 volume percent of alcohol and from about 1/2 to about 5 volume percent of a nonionic surfactant.

Claim 9

Independent Claim 83 words

A method of gravel packing a subterranean formation surrounding a wellbore which comprises: placing particles coated with a solid thermosetting resin in said wellbore adjacent said formation; said resin being capable of fusing and curing to an infusible state; injecting an afterflush fluid into the resin coated particles adjacent said formation, said afterflush fluid containing an agent capable of lowering the temperature at which said resin fuses; and thereafter causing said resin to cure to an infusible state thereby bonding the particles together.

Claim 10

Independent Claim 83 words

A method of gravel packing a subterranean formation surrounding a wellbore which comprises: placing particles coated with a solid thermosetting resin in said wellbore adjacent said formation; said resin being capable of fusing and curing to an infusible state; injecting an afterflush fluid into the resin coated particles adjacent said formation, said afterflush fluid containing an agent capable of lowering the temperature at which said resin fuses; and thereafter causing said resin to cure to an infusible state thereby bonding the particles together.

Claim 11

Dependent Claim 16 words

A method defined in claim 8 wherein the resin is a one-step resole type phenolic resin.

Claim 12

Dependent Claim 38 words

A method as defined in claim 8 wherein the afterflush fluid is an aqueous fluid containing at least 1/2 volume percent of an alcohol soluble in said resin and at least 1/2 volume percent of a nonionic surfactant.

Claim 13

Independent Claim 110 words

A method of treating a subterranean formation surrounding a wellbore which comprises packing particles coated with a solid thermosetting resin capable of fusing and curing to an infusible state in contact with said formation; overflushing the particles packed in contact with sand formation with an aqueous solution containing from about 1/2 to about 20 volume percent of an alcohol soluble in said resin and from about 1/2 to about 5 volume percent of a nonionic surfactant, said alcohol and surfactant being capable of lowering the fusion temperature of the resin to cause said resin to fuse; and thereafter, curing said resin to an infusible state thereby bonding said particles together.

Claim 14

Independent Claim 110 words

A method of treating a subterranean formation surrounding a wellbore which comprises packing particles coated with a solid thermosetting resin capable of fusing and curing to an infusible state in contact with said formation; overflushing the particles packed in contact with sand formation with an aqueous solution containing from about 1/2 to about 20 volume percent of an alcohol soluble in said resin and from about 1/2 to about 5 volume percent of a nonionic surfactant, said alcohol and surfactant being capable of lowering the fusion temperature of the resin to cause said resin to fuse; and thereafter, curing said resin to an infusible state thereby bonding said particles together.

Claim 15

Dependent Claim 39 words

A method as defined in claim 11 wherein the resin is a one step phenolic resin and the aqueous solution contains at least 1 volume percent of said alcohol and at least one volume percent of said nonionic surfactant.

Annuity Stage	Window Opens	Payment Deadline	Surcharge Period Until	Estimated Fee	Status
3.5 Years (Year 4)	1985-06-28	1985-12-28	1986-06-29	$2000.00	Window Closed / Lapsed
7.5 Years (Year 8)	1989-06-28	1989-12-28	1990-06-29	$3760.00	Window Closed / Lapsed
11.5 Years (Year 12)	1993-06-28	1993-12-28	1994-06-29	$7700.00	Window Closed / Lapsed

Method of treating wells using resin-coated particles

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