US4226284A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Gas well dewatering method and system
Assignee: Individual
•
Filing: 1978-06-22
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Granted: 1980-10-07
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Expires: 1998-06-22
Abstract
Abstract A method and system for dewatering gas wells on an intermittent, cyclical, period which operates to eject water from the well without loss of gas from the well, or inordinate shut down delays. The said method and system for dewatering gas wells includes time controlled valves and the pressure differential between the tubing and the casing to periodically dewater the well, without the ususal loss of gas.
Inventors
- 👤 Jack E. Evans
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 16:44
CPC Classifications
E; E21; E21B; E21B43/00; E21B43/34; E21B43/12; E21B43/121; E21B43/13
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
154 words
In an gas well having a casing and tubing string in which liquid collection at the bottom of the well interferes with gas production, a system for shutting off the normal flow of gas, and directing the greater casing pressure down the tubing string as desired intervals that comprises a blow-back line connecting the well casing to a flow line said flow line through which the gas from a normally producing well passes; said blow-back line having a shutoff valve, a normally closed motor valve; a normally opened motor valve in the flow line down stream from the junction of the flow line and the blow-back line; a timer connected by a bleed line to the well head, said bleed line having a shut off valve and first gas regulator and a second gas regulator, said bleed line further connecting from the timer to the normally closed motor valve, and normally opened motor valve.
Claim 2
Dependent Claim
154 words
In an gas well having a casing and tubing string in which liquid collection at the bottom of the well interferes with gas production, a system for shutting off the normal flow of gas, and directing the greater casing pressure down the tubing string as desired intervals that comprises a blow-back line connecting the well casing to a flow line said flow line through which the gas from a normally producing well passes; said blow-back line having a shutoff valve, a normally closed motor valve; a normally opened motor valve in the flow line down stream from the junction of the flow line and the blow-back line; a timer connected by a bleed line to the well head, said bleed line having a shut off valve and first gas regulator and a second gas regulator, said bleed line further connecting from the timer to the normally closed motor valve, and normally opened motor valve.
Claim 3
Dependent Claim
139 words
In a gas well having a casing and tubing string in which liquid collection at the bottom of the well interferes with gas production, a system for shutting off the normal flow of gas and directing the greater casing pressure down the tubing string at desired intervals comprises a blow-back line connecting the well casing to a flow line said flow line being that through which the gas from a normally producing well passes; said blow-back line having a shut-off valve, a three way motor valve in the junction of the blow-back line and the flow line, a timer connected by a bleed line to the well head, said bleed line having a shut-off valve and a first gas regulator and a second gas regulator, said bleed line further connecting from the timer to the three way motor valve.
Claim 4
Dependent Claim
139 words
In a gas well having a casing and tubing string in which liquid collection at the bottom of the well interferes with gas production, a system for shutting off the normal flow of gas and directing the greater casing pressure down the tubing string at desired intervals comprises a blow-back line connecting the well casing to a flow line said flow line being that through which the gas from a normally producing well passes; said blow-back line having a shut-off valve, a three way motor valve in the junction of the blow-back line and the flow line, a timer connected by a bleed line to the well head, said bleed line having a shut-off valve and a first gas regulator and a second gas regulator, said bleed line further connecting from the timer to the three way motor valve.
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) | 1983-10-07 | 1984-04-07 | 1984-10-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-10-07 | 1988-04-07 | 1988-10-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-10-07 | 1992-04-07 | 1992-10-07 | $7700.00 | Window Closed / Lapsed |