Patent US4796702A successfully refreshed from Google Patents.
US4796702A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Multipurpose aqueous foamer
Assignee: Baker Hughes Holdings LLC
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Filing: 1987-09-04
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Granted: 1989-01-10
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Expires: 2007-09-04
Abstract
Abstract The invention provides a surfactant mixture, comprising a zwitterionic surfactant, a nonionic surfactant and a cationic surfactant, which forms a foamable liquid composition upon addition to aqueous media including fresh water, brines, acids and water/alcohol mixtures. The foams prepared from the foamable liquid composition have utility as fracturing fluids and well cleaning fluids.
Inventors
- 👤 Gary A. Scherubel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 10:36
CPC Classifications
C; C09; C09K; C09K8/00; C09K8/52; C09K8/536; C09K8/60; C09K8/62; C09K8/70; C09K8/703; Y; Y10; Y10S; Y10S507/00; Y10S507/922; Y10S516/00; Y10S516/01; Y10S516/03; Y10S516/05; Y10S516/07
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
51 words
An aqueous composition containing from about 0.025 to about 1.0 percent by weight of a composition comprising from about 5 to about 20 percent by weight zwitterionic surfactant, from about 10 to about 50 percent by weight cationic surfactant and from about 1 to about 10 percent by weight nonionic surfactant.
Claim 2
Dependent Claim
51 words
An aqueous composition containing from about 0.025 to about 1.0 percent by weight of a composition comprising from about 5 to about 20 percent by weight zwitterionic surfactant, from about 10 to about 50 percent by weight cationic surfactant and from about 1 to about 10 percent by weight nonionic surfactant.
Claim 3
Dependent Claim
39 words
Composition of claim 1 comprising from about 5 to about 15 percent by weight zwitterionic surfactant, from about 10 to about 30 percent by weight cationic surfactant and from about 2 to about 8 percent by weight nonionic surfactant.
Claim 4
Dependent Claim
27 words
Composition of claim 2 comprising about 6 percent by weight zwitterionic surfactant, about 20 percent by weight cationic surfactant and about 5.5 percent by weight nonionic surfactant.
Claim 5
Dependent Claim
27 words
Composition of claim 2 comprising about 15 percent by weight zwitterionic surfactant, about 20 percent by weight cationic surfactant and about 5.5 percent by weight nonionic surfactant.
Claim 6
Dependent Claim
11 words
Composition of claim 1 wherein said zwitterionic surfactant is a sulfo-betaine.
Claim 7
Dependent Claim
13 words
Composition of claim 1 wherein said cationic surfactant is an ethoxylated tallow amine.
Claim 8
Dependent Claim
13 words
Composition of claim 1 wherein said nonionic surfactant is a silicone glycol polymer.
Claim 9
Dependent Claim
14 words
A foam resulting from incorporation of a gas into the composition of claim 1.
Claim 10
Dependent Claim
17 words
Method of fracturing a subterranean hydrocarbon-bearing formation comprising injecting a foam of claim 8 into said formation.
Claim 11
Dependent Claim
36 words
Method of cleaning a well bore comprising injecting a foam of claim 8 under pressure into said bore via tubing in said bore and allowing said foam to return to the surface via the well annulus.
Claim 12
Dependent Claim
13 words
Composition comprising a sulfo-betaine, an ethoxylated tallow amine and a silicone glycol polymer.
Claim 13
Dependent Claim
13 words
Composition comprising a sulfo-betaine, an ethoxylated tallow amine and a silicone glycol polymer.
Claim 14
Dependent Claim
14 words
A foam resulting from incorporation of a gas into the composition of claim 11.
Claim 15
Dependent Claim
17 words
Method of fracturing a subterranean hydrocarbon-bearing formation comprising injecting a foam of claim 12 into said formation.
Claim 16
Dependent Claim
36 words
Method of cleaning a well bore comprising injecting a foam of claim 12 under pressure into said bore via tubing in said bore and allowing said foam to return to the surface via the well annulus.
References Cited (Backward Citations)
US3304349A
Cited
US4009256A
Cited
US4108782A
Cited
US4261869A
Cited
US4216097A
Cited
US4259191A
Cited
US4383929A
Cited
US4404112A
Cited
US4370243A
Cited
US4431789A
Cited
US4450091A
Cited
US4681165A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-01-10 | 1992-07-11 | 1993-01-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-01-10 | 1996-07-11 | 1997-01-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-01-10 | 2000-07-11 | 2001-01-10 | $7700.00 | Window Closed / Lapsed |