Patent US3701388A successfully refreshed from Google Patents.
US3701388A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Drilling method
Assignee: Individual
•
Filing: 1970-02-11
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Granted: 1972-10-31
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Expires: 1990-02-11
Abstract
Abstract A drilling method which includes the usual steps of rotating a drill string and circulating a drilling fluid together with the steps of detecting an increase in the rate of increase of temperature of the drilling fluid and taking appropriate steps responsive to such increase in rate such as increasing the weight of drilling fluid, setting casing to allow drilling fluid weight to be increased, to prepare for a high pressure formation being approached by the drill bit or stopping the drilling to avoid drilling into the high pressure formation.
Inventors
- 👤 Jasper N Warren
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 07:06
CPC Classifications
E; E21; E21B; E21B47/00; E21B47/06; E21B47/07
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
72 words
The drilling method including the steps of, rotating a drill string with a drill bit thereon to drill a well bore, circulating drilling fluid to the bottom of the well bore and back to the surface, detecting the temperature of the drilling fluid returned to the surface, and preventing a well blow-out responsive to the detection of an increase in the rate of increase of the detected temperature of the drilling fluid.
Claim 2
Dependent Claim
72 words
The drilling method including the steps of, rotating a drill string with a drill bit thereon to drill a well bore, circulating drilling fluid to the bottom of the well bore and back to the surface, detecting the temperature of the drilling fluid returned to the surface, and preventing a well blow-out responsive to the detection of an increase in the rate of increase of the detected temperature of the drilling fluid.
Claim 3
Dependent Claim
19 words
The drilling method according to claim 1, wherein said preventing step includes, increasing the weight of the drilling fluid.
Claim 4
Dependent Claim
18 words
The drilling method according to claim 1, wherein said preventing step includes, setting casing within the well bore.
Claim 5
Dependent Claim
29 words
The drilling method according to claim 1, wherein said preventing step includes, stopping the drilling steps to avoid entry of the drill bit into the anticipated high pressure formation.
Claim 6
Dependent Claim
29 words
The method according to claim 1, wherein the temperature measuring step is taken at a surface location which minimizes the influence of surface atmospheric conditions on the temperature measured.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-10-31 | 1976-05-01 | 1976-10-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-10-31 | 1980-05-01 | 1980-10-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-10-31 | 1984-05-01 | 1984-10-31 | $7700.00 | Window Closed / Lapsed |