US3720263A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Gas well stimulation
Assignee: Cities Service Oil Co
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Filing: 1970-10-13
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Granted: 1973-03-13
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Expires: 1990-10-13
Abstract
Abstract The problem of reduction in productivity in gas wells due to connate water reducing gas permeability about the wellbore is overcome. Dry gas is injected into the production well in sufficient quantities to remove the majority of the water which restricts gas flow about the well. The dry gas is obtained from gas produced from a well completed in the formation at some distance from the well being dryed and stimulated. Gas produced is passed over a drying agent, compressed and injected into the production well so that the wellbore in the vicinity of the formation is rendered free of water with a high permeability to gas resulting.
Inventors
- 👤 B Murphy
- 👤 J Scott
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 19:41
CPC Classifications
E; E21; E21B; E21B43/00; E21B43/32
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
58 words
A process for removing the connate water saturation of a reservoir about a gas production well, which comprises injecting a gas which has been dehydrated to less than about 2 percent by weight water into the production well through the wellbore thereof at a pressure sufficient to invade the reservoir and dry the connate water from the wellbore.
Claim 2
Dependent Claim
58 words
A process for removing the connate water saturation of a reservoir about a gas production well, which comprises injecting a gas which has been dehydrated to less than about 2 percent by weight water into the production well through the wellbore thereof at a pressure sufficient to invade the reservoir and dry the connate water from the wellbore.
Claim 3
Dependent Claim
28 words
The process of claim 1 in which the dry gas is selected from the group consisting of dehydrated flue dehydrated gas, natural gas, carbon dioxide, ethane and propane.
Claim 4
Dependent Claim
12 words
The process of claim 1 in which the dehydrated gas is heated.
Claim 5
Dependent Claim
23 words
The process of claim 3 in which the dehydrated gas is heated to a temperature of about 200* F to about 1,000* F.
Claim 6
Dependent Claim
21 words
The process of claim 1 in which the dehydrated gas is natural gas produced from the reservoir which has been dehydrated.
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) | 1976-03-12 | 1976-09-11 | 1977-03-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-03-12 | 1980-09-11 | 1981-03-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-03-12 | 1984-09-11 | 1985-03-13 | $7700.00 | Window Closed / Lapsed |