Patent US4289204A successfully refreshed from Google Patents.
US4289204A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Solar heat treating of well fluids
Assignee: STEWART CHERRI GAE
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Filing: 1979-05-03
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Granted: 1981-09-15
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Expires: 1999-05-03
Abstract
Abstract Methods and apparatus for treatment of crude oil and well fluids and equipment used in conducting the well fluids. Solar heating means are provided to heat the well fluids to improve the treatment qualities of the fluids. A solar heater is connected to an oil well flow line to remove paraffin and demulsify at the oil well site.
Inventors
- 👤 Orvel L. Stewart
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 07:29
CPC Classifications
E; E21; E21B; E21B36/00; E21B37/00; Y; Y10; Y10S; Y10S166/00; Y10S166/902; Y10T; Y10T137/00; Y10T137/6416; Y10T137/6552
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
86 words
A method of treating an oil well flow line that conducts well fluids for removing paraffin from the flow line, comprising the steps of: a. diverting the well fluids from the flow line at a location upstream of the portion of the flow line to be treated; b. heating the diverted well fluids by solar heating means; and c. returning the heated well fluids to the flow line upstream of the portion of the flow line to be treated and downstream of the point of diverting.
Claim 2
Independent Claim
86 words
A method of treating an oil well flow line that conducts well fluids for removing paraffin from the flow line, comprising the steps of: a. diverting the well fluids from the flow line at a location upstream of the portion of the flow line to be treated; b. heating the diverted well fluids by solar heating means; and c. returning the heated well fluids to the flow line upstream of the portion of the flow line to be treated and downstream of the point of diverting.
Claim 3
Dependent Claim
38 words
The method of claim 1 which further includes the step of: storing heat transferred to the well fluids by a thermal storage device for heating well fluids passing therethrough when said solar heating means is transfering less heat.
Claim 4
Independent Claim
146 words
A method of treating a downhole portion of an oil well of the type having a pipe through which well fluids are pumped which extends from an oil-producing formation to the surface, a casing surrounding the pipe which also extends from the oil-producing formation to the surface, and a flow line connected to the surface end of the pipe and through which the well fluids are transported away from the well, the method comprising the steps of: a. diverting a portion of the well fluid being transported through the flow line into a solar heating means; b. heating the diverted fluid in the solar heating means; c. conducting the heated fluid to the conduit formed between the casing and the pipe; and d. regulating the pressure in the flow line and the conduit such that the heated fluid circulates through the conduit to the oil-producing formation.
Claim 5
Independent Claim
146 words
A method of treating a downhole portion of an oil well of the type having a pipe through which well fluids are pumped which extends from an oil-producing formation to the surface, a casing surrounding the pipe which also extends from the oil-producing formation to the surface, and a flow line connected to the surface end of the pipe and through which the well fluids are transported away from the well, the method comprising the steps of: a. diverting a portion of the well fluid being transported through the flow line into a solar heating means; b. heating the diverted fluid in the solar heating means; c. conducting the heated fluid to the conduit formed between the casing and the pipe; and d. regulating the pressure in the flow line and the conduit such that the heated fluid circulates through the conduit to the oil-producing formation.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-09-14 | 1985-03-16 | 1985-09-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-09-14 | 1989-03-16 | 1989-09-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-09-14 | 1993-03-16 | 1993-09-15 | $7700.00 | Window Closed / Lapsed |