US4195653A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for recovering products of low pumpability
Assignee: IFP Energies nouvelles
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Filing: 1977-12-12
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Granted: 1980-04-01
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Expires: 1997-12-12
Abstract
Abstract This method and apparatus comprises displacing the product to be removed from a tank by forming and permanently maintaining at the upper part of the tank, above the product, an aqueous phase filling progressively the tank as the product is removed through a drain pipe. Jets of hot water are introduced into this aqueous phase and a secondary injection is effected in said aqueous phase above the level of these jets.
Inventors
- 👤 Maurice Cessou
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 01:15
CPC Classifications
B; B63; B63C; B63C7/00; B63C7/006; E; E21; E21B; E21B43/00; E21B43/28; E21B43/29; F; F04; F04F; F04F1/00; F04F1/18; Y; Y10; Y10T; Y10T137/00; Y10T137/0318; Y10T137/0391; Y10T137/0402; Y10T137/0441; Y10T137/048; Y10T137/2931; Y10T137/3115; Y10T137/4238; Y10T137/4245; Y10T137/4259; Y10T137/8593; Y10T137/85954
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
133 words
An apparatus for withdrawing from a tank a product difficult to pump, comprising at least one drain pipe for the product, equipped with means for connection to the tank, and means for feeding the tank with hot water, wherein said feeding means comprise in combination at least one injection device comprising at least one nozzle for creating at least one striking and stirring hot water jet, this injection device being adapted for connection to the upper part of the tank and being connected with at least one hot water injection pipe, and at least one secondary injection device located in said outlet pipe and oriented in the direction of discharge of the product, this secondary injection device opening in the tank above the level of said nozzle creating said striking and stirring jet.
Claim 2
Independent Claim
133 words
An apparatus for withdrawing from a tank a product difficult to pump, comprising at least one drain pipe for the product, equipped with means for connection to the tank, and means for feeding the tank with hot water, wherein said feeding means comprise in combination at least one injection device comprising at least one nozzle for creating at least one striking and stirring hot water jet, this injection device being adapted for connection to the upper part of the tank and being connected with at least one hot water injection pipe, and at least one secondary injection device located in said outlet pipe and oriented in the direction of discharge of the product, this secondary injection device opening in the tank above the level of said nozzle creating said striking and stirring jet.
Claim 3
Dependent Claim
54 words
An apparatus according to claim 1, wherein said drain pipe is connected with means for separating from water the product to be removed and means for reheating and recycling the separated water, these recycling means being connected through at least one injection pipe to said device for injecting said striking and stirring hot water.
Claim 4
Dependent Claim
31 words
An apparatus according to claim 1, wherein said device for creating said striking and stirring hot water jet is adapted to produce at least one jet having a downward vertical component.
Claim 5
Dependent Claim
15 words
An apparatus according to claim 1 wherein said secondary injection device co-operates with a venturi.
Claim 6
Dependent Claim
13 words
An apparatus according to claim 1, comprising means for rotating said injection nozzle.
Claim 7
Dependent Claim
15 words
An apparatus according to claim 1, comprising means for displacing said injection nozzle by translation.
Claim 8
Dependent Claim
32 words
An apparatus according to claim 1, wherein said secondary scavenging injection device surrounds the end of said device creating said striking and stirring jet, to facilitate reheating thereof during the starting period.
Claim 9
Dependent Claim
36 words
An apparatus according to claim 1, comprising at least one additional injection pipe for displacing the mixture of water and product to be removed, this additional injection pipe opening through a hydro-ejector into said drain pipe.
Claim 10
Dependent Claim
70 words
An apparatus according to claim 1, for discharging from an underwater tank, products which are difficult to pump, wherein said outlet pipe comprises at least one column for raising the products, said column being supported by a surface installation and connected to the tank through a flexible pipe and at least one additional pipe for injection of a driving fluid, said additional pipe opening into said column through a hydro-ejector.
Claim 11
Dependent Claim
36 words
An apparatus according to claim 9, wherein said column has secured thereto two water injection pipes connected through flexible pipes respectively to said device creating said striking and stirring jet and to said secondary injection device.
Claim 12
Dependent Claim
23 words
An apparatus according to claim 1, comprising safety devices for sealing the tank in case of disconnection of the injection and outlet pipes.
Claim 13
Dependent Claim
25 words
An apparatus according to claim 1, comprising antipollution means limiting the difference between the pressure inside the tank and the pressure in the surrounding medium.
Claim 14
Dependent Claim
15 words
An apparatus according to claim 3, wherein said secondary injection device co-operates with a venturi.
Claim 15
Dependent Claim
31 words
An apparatus according to claim 2, wherein said device for creating said striking and stirring hot water jet is adapted to produce at least one jet having a downward vertical component.
Claim 16
Dependent Claim
15 words
An apparatus according to claim 2, wherein said secondary injection device co-operates with a venturi.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1983-04-01 | 1983-10-01 | 1984-04-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-04-01 | 1987-10-01 | 1988-04-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-04-01 | 1991-10-01 | 1992-04-01 | $7700.00 | Window Closed / Lapsed |