US3756409A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Water disposal caisson and method of using same
Assignee: Individual
•
Filing: 1971-08-06
•
Granted: 1973-09-04
•
Expires: 1991-08-06
Abstract
Abstract The present disclosure is directed to a waste water disposal caisson for removing the oil from the waste water prior to discharging the waste water from an offshore oil drilling platform and comprises a main caisson having an oil collecting tube within the caisson which tube has an oil spillover opening proximate its top, a waste water introduction tube for introducing the waste water below the oil-water interface within the caisson and a pumping control means for pumping the oil from the oil collecting tube as it approaches the tubes capacity.
Inventors
- 👤 C Carmichael
- 👤 A Franklin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 13:46
CPC Classifications
E; E03; E03F; E03F5/00; E03F5/14; E03F5/16; B; B01; B01D; B01D17/00; B01D17/02; B01D17/0208; E21; E21B; E21B41/00; E21B41/005
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
202 words
An offshore water disposal caisson for separating oil from waste water comprising a. an outer caisson having an open bottom for communicating with the body of water in which the caisson is immersed below the surface thereof b. an oil collection tube having a closed bottom and a side wall oil filling opening through which oil is introduced proximate its upper end, said tube being of a diameter less than the diameter of said outer caisson and being within same c. means carried by said caisson within same and externally of said oil collection tube for introducing the oil containing waste water below the oil-water inteRface d. means connected between said oil collection tube and said outer caisson for raising and lowering said tube to position the oil filling opening through the side wall of said tube above mean low water level of the water body in which the caisson is immersed, e. and pumping means connected to said oil collection tube and having floatation signal means therein to actuate same when the oil level in said collection tube approaches the bottom of the oil filling opening in the side wall of said tube to remove the collected and separated oil therefrom.
Claim 2
Dependent Claim
202 words
An offshore water disposal caisson for separating oil from waste water comprising a. an outer caisson having an open bottom for communicating with the body of water in which the caisson is immersed below the surface thereof b. an oil collection tube having a closed bottom and a side wall oil filling opening through which oil is introduced proximate its upper end, said tube being of a diameter less than the diameter of said outer caisson and being within same c. means carried by said caisson within same and externally of said oil collection tube for introducing the oil containing waste water below the oil-water inteRface d. means connected between said oil collection tube and said outer caisson for raising and lowering said tube to position the oil filling opening through the side wall of said tube above mean low water level of the water body in which the caisson is immersed, e. and pumping means connected to said oil collection tube and having floatation signal means therein to actuate same when the oil level in said collection tube approaches the bottom of the oil filling opening in the side wall of said tube to remove the collected and separated oil therefrom.
Claim 3
Dependent Claim
47 words
An offshore water disposal caisson as claimed in claim 1 wherein the means for raising and lowering the oil collection tube relative to the caisson comprise perforate straps connected to the tube which are removably bolted to an anchor lug carried by the top of said caisson.
Claim 4
Dependent Claim
92 words
An offshore water disposal caisson as claimed in claim 1 wherein the floatation signal means of said pumping means disposed within the oil collection tube which initiates the pumping action to remove the oil from the tube when its level approaches the opening through the side wall are two float switches one of which is proximate the bottom of the tube and the other of which is proximate the bottom of the side wall opening and both of which must be floating to actuate pumping of the collected oil from said tube.
Claim 5
Dependent Claim
56 words
An offshore water disposal caisson as claimed in claim 1 further comprising staggered baffle plates disposed angularly within the caisson beneath the means for introducing the waste water and said oil collection tube to provide a washing action on entrapped sand to provide a washing action on the sand and to assist in releasing trapped oil.
Claim 6
Dependent Claim
41 words
An offshore water disposal caisson as claimed in claim 1 further comprising a sample line within the caisson external of said oil collection tube and extending to proximate the base of the caisson to test water being discharged from the caisson.
Claim 7
Dependent Claim
42 words
An offshore water disposal caisson as claimed in claim 1 wherein said means for introducing the oil containing waste water is a tube having vertically slotted openings for discharging the waste water raidially of the tube into the water within the caisson.
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) | 1976-09-03 | 1977-03-05 | 1977-09-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-09-03 | 1981-03-05 | 1981-09-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-09-03 | 1985-03-05 | 1985-09-04 | $7700.00 | Window Closed / Lapsed |