US3685807A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for forming foam for use in wells
Assignee: Chevron USA Inc
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Filing: 1969-12-03
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Granted: 1972-08-22
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Expires: 1989-12-03
Abstract
Abstract A foam generator for use in mixing gas and a foamable solution to preform a foam for use as a circulating fluid in a well.
Inventors
- 👤 Albert E Campbell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 21:36
CPC Classifications
E; E21; E21B; E21B21/00; E21B21/14; B; B01; B01F; B01F23/00; B01F23/20; B01F23/23; B01F23/235; E21B37/00
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
101 words
Apparatus providing foam for use in a well comprising a foamable solution source, a gas source, a hollow tubular member, conduit means connecting said gas source and said foamable solution source to one end of said tubular member for flowing gas and foamable solution into said tubular member along the longitudinal axis thereof, a regular multiple helical insert in said tubular member to cause said gas and foamable solution to swirl down said tubular member, a foam outlet on the other end of said tubular member and foam conduit means connecting the foam outlet of said tubular member with a well.
Claim 2
Dependent Claim
101 words
Apparatus providing foam for use in a well comprising a foamable solution source, a gas source, a hollow tubular member, conduit means connecting said gas source and said foamable solution source to one end of said tubular member for flowing gas and foamable solution into said tubular member along the longitudinal axis thereof, a regular multiple helical insert in said tubular member to cause said gas and foamable solution to swirl down said tubular member, a foam outlet on the other end of said tubular member and foam conduit means connecting the foam outlet of said tubular member with a well.
Claim 3
Dependent Claim
36 words
The apparatus of claim 1 further characterized by a pair of tubular members, each containing a helical insert, connected in parallel to the conduit means carrying the foamable solution and gas and the foam conduit means.
Claim 4
Independent Claim
88 words
A method of providing stable foam for use in well operations comprising flowing gas from a gas source to a conduit, flowing a foamable solution from a foamable solution source to said conduit, mixing said gas and said foamable solution together in said conduit in proportions suitable for making stable foam, flowing said mixed gas and foamable solution in said conduit in a helical pattern through at least a portion of said conduit to form stable foam and injecting said stable foam down a well for use therein.
Claim 5
Independent Claim
88 words
A method of providing stable foam for use in well operations comprising flowing gas from a gas source to a conduit, flowing a foamable solution from a foamable solution source to said conduit, mixing said gas and said foamable solution together in said conduit in proportions suitable for making stable foam, flowing said mixed gas and foamable solution in said conduit in a helical pattern through at least a portion of said conduit to form stable foam and injecting said stable foam down a well for use therein.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-08-22 | 1976-02-21 | 1976-08-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-08-22 | 1980-02-21 | 1980-08-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-08-22 | 1984-02-21 | 1984-08-22 | $7700.00 | Window Closed / Lapsed |