US4553989A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Safety system for removing any risk of carrying liquids to the nose of the flare or to the vent-hole during burning or dispersion of the gases associated with production
Assignee: Individual
•
Filing: 1983-03-11
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Granted: 1985-11-19
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Expires: 2003-03-11
Abstract
Abstract The invention provides a safety system comprising in the gas flow chain, between the liquid entrainment source and the nose of the flare or of the vent-hole, at least one capacity such as a flare foot tank (1) having at least one overflow column (4) opening below a liquid level (5,6), for example the sea, at a predetermined distance from its tapping (11) to said capacity. It further comprises means (7) for avoiding, should liquid overflow into the overflow column (4), the retention and entrapping of gases in the overflowed liquid or below said liquid.
Inventors
- 👤 Gerard Chaudot
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 10:48
CPC Classifications
E; E21; E21B; E21B41/00; E21B41/005; E21B43/00; E21B43/34; E21B43/36
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
123 words
An improved safety system for preventing the accidental burning of liquids that might become entrained in a hydrocarbon gas stream during burning or dispersion of gases associated with the production or treatment of hydrocarbons, this system comprising, in a gas flow chain, between a liquid entrainment source and a nose of a flare tip, at least one tank (1) having at least one overflow column (4) opening below a liquid level (5,6), at a predetermined distance from a tapping point (11) to said tank, the improvement comprising: means (7,13,14) for avoiding, in the case of liquid overflowing into the overflow column (4), the retention and trapping of gases in the overflow column (4), the retention and trapping of gases in the overflow liquid.
Claim 2
Dependent Claim
123 words
An improved safety system for preventing the accidental burning of liquids that might become entrained in a hydrocarbon gas stream during burning or dispersion of gases associated with the production or treatment of hydrocarbons, this system comprising, in a gas flow chain, between a liquid entrainment source and a nose of a flare tip, at least one tank (1) having at least one overflow column (4) opening below a liquid level (5,6), at a predetermined distance from a tapping point (11) to said tank, the improvement comprising: means (7,13,14) for avoiding, in the case of liquid overflowing into the overflow column (4), the retention and trapping of gases in the overflow column (4), the retention and trapping of gases in the overflow liquid.
Claim 3
Dependent Claim
40 words
The system according to claim 1, characterized in that it comprises a circuit (9) for removing, as far as the installation situated upstream of the overflow column (4), existing gases or gases entrained by liquids in said overflow column (4).
Claim 4
Dependent Claim
38 words
The system according to claim 2, characterized in that said gas removal circuit consists of a strainer tube (7) having an upper and lower end and a smaller cross section than the overflow column (4) and mounted thereinside.
Claim 5
Dependent Claim
39 words
The system according to claim 3, characterized in that the lower end of the strainer tube 7 is placed, at the lowest, in the vicinity of the lowest level (6) reached by the water in the overflow column (4).
Claim 6
Dependent Claim
43 words
The system according to claim 3, characterized in that the upper end (8) of the strainer tube 7 is connected to the tank (1) at a tapping point (10) situated above the tapping (11) of the overflow column (4) to said tank (1).
Claim 7
Dependent Claim
58 words
The system according to claim 5, characterized in that the tapping point (10) of said strainer tube (7) to the installation is located at a point where the gases are vented to the atmosphere so that the separation of the liquids, carried along by the rising gases, may take place before venting of the gases to the atmosphere.
Claim 8
Dependent Claim
49 words
The system according to claim 3 characterized in that the upper end (8) of the strainer tube (7) is connected to a flare shaft (3) connected to the upper end of the tank (1) in the case where said flare shaft (3) plays the role of the tank (1).
Claim 9
Independent Claim
41 words
The system according to claims 1 or 2, characterized in that a substantially horizontal part (12) of the overflow column (4) opens tangentially into said overflow column (4) so as to minimize trapping or entrainnment of gases in said column (4).
Claim 10
Independent Claim
65 words
The system according to claims 1 or 2, characterized in that the inner surface of the upper end of the overflow column (4) is equipped with guide members for generating a helical movement of liquids descending in the overflow column, so as to promote flow of the descending liquids and create a central chimney for removing gases trapped below the liquids or carried along thereby.
Claim 11
Independent Claim
43 words
The system according to claims 1 or 2, characterized in that said gas removal circuit comprises a gas discharge tube (13) placed outside the overflow column (4) and communicating with said overflow column through a series of pipes (14) situated at different levels.
Claim 12
Dependent Claim
43 words
The system according to claim 10, characterized in that the upper end (15) of said discharge tube (13) is connected to the tank (1) at a point (16) situated above the tapping point (17) of the overflow column (4) to said tank (1).
Claim 13
Dependent Claim
46 words
The system according to claim 10, characterized in that the upper end (15) of said discharge tube (13) is connected to a flare shaft (3) connected to the upper end of the tank (1) if said flare shaft (3) plays the role of the tank (1).
Claim 14
Dependent Claim
36 words
The system according to claim 1, characterized in that the overflow column (4) is equipped with at least one detection member for detecting the presence of hydrocarbons at an abnormal level inside said overflow column (4).
Claim 15
Dependent Claim
41 words
The system according to claim 13, characterized in that said detection member consists of one or more high level detectors placed in the aerial part of the overflow column (4), said detectors designed so as to detect the presence of hydrocarbons.
Claim 16
Independent Claim
30 words
The system according to one of claims 13 or 14, characterized in that said detection member is placed outside the overflow column (4) and is protected by an associated pipe.
Claim 17
Dependent Claim
38 words
The system according to claim 13, characterized in that said detection members consist of one or more pressure detectors placed in the lower end of the overflow column (4), said detectors designed to detect the presence of hydrocarbons.
Claim 18
Independent Claim
32 words
The system according to claims 1 or 2, characterized in that said system uses a multiplicity of overflow columns (4) set up in the most favorable zones of the gas flow chain.
References Cited (Backward Citations)
US1863111A
Cited
US2578568A
Cited
US2857979A
Cited
GB856195A
Cited
US3088595A
Cited
US3151961A
Cited
US3362140A
Cited
US3386230A
Cited
US3486306A
Cited
US3778984A
Cited
US3875998A
Cited
US3771290A
Cited
US4113450A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1988-11-18 | 1989-05-20 | 1989-11-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-11-18 | 1993-05-20 | 1993-11-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-11-18 | 1997-05-20 | 1997-11-19 | $7700.00 | Window Closed / Lapsed |