Patent US3297098A successfully refreshed from Google Patents.
US3297098A
Expired / Lapsed
US
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Process for aerated drilling
Assignee: GAF Chemicals Corp
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Filing: 1963-08-13
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Granted: 1967-01-10
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Expires: 1983-08-13
Abstract
No abstract record available.
Inventors
- 👤 Stanley H Elman
- 👤 Fred E Woodward
- 👤 Frank F Sullivan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 19:00
CPC Classifications
E; E21; E21B; E21B21/00; E21B21/14; C; C09; C09K; C09K8/00; C09K8/02; C09K8/38; C09K8/52
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
150 words
IN A PROCESS OF DRILLING A WELL WHEREIN THERE IS CIRCULATED THROUGH THE WELL DURING SAID DRILLING A DRILLING FLUID INTO WHICH GASES ARE INJECTED TO PRODUCE FOAM FOR CARRYING CUTTINGS FROM THE WELL; THE IMPROVEMENT WHICH COMPRISES INCORPORATING IN SAID DRILLING FLUID AS A FOAMING AGENT, ANTIWEAR AGENT AND CORROSION INHIBITION AGENT, A MINOR AMOUNT OF A PHOSPHATE SELECTED FROM THE GROUP CONSISTING OF (1) MONO- AND (2) DI-ESTERS AND (3) TRI-ESTERS AND (4) MIXTURES THEREOF OF PHOSPHORIC ACIS WITH A NONIONIC SURFACTANT DERIVED BY CONDENSATION OF (5) AN ORGANIC COMPOUND CONTAINING AT LEAST 6 CARBON ATOMS AND CONTAINING A REACTIVE HYDROGENATOM AND (6) AT LEAST THREE MOLES OF ETHYLENE OXIDE. TO IMPROVE FLUID DISPLACEMENT DURING DRILLING, TO REDUCE FRICTION ON THE DRILLING TOOLS AND TO DECREASE CORROSON OF THE DRILLING TOOLS TO THEREBY IMPROVE THE EFFICIENCY OF THE DRILLING PROCESS AND EXTENT THE LIFE OF SAID DRILLING TOOLS.
Claim 2
Dependent Claim
150 words
IN A PROCESS OF DRILLING A WELL WHEREIN THERE IS CIRCULATED THROUGH THE WELL DURING SAID DRILLING A DRILLING FLUID INTO WHICH GASES ARE INJECTED TO PRODUCE FOAM FOR CARRYING CUTTINGS FROM THE WELL; THE IMPROVEMENT WHICH COMPRISES INCORPORATING IN SAID DRILLING FLUID AS A FOAMING AGENT, ANTIWEAR AGENT AND CORROSION INHIBITION AGENT, A MINOR AMOUNT OF A PHOSPHATE SELECTED FROM THE GROUP CONSISTING OF (1) MONO- AND (2) DI-ESTERS AND (3) TRI-ESTERS AND (4) MIXTURES THEREOF OF PHOSPHORIC ACIS WITH A NONIONIC SURFACTANT DERIVED BY CONDENSATION OF (5) AN ORGANIC COMPOUND CONTAINING AT LEAST 6 CARBON ATOMS AND CONTAINING A REACTIVE HYDROGENATOM AND (6) AT LEAST THREE MOLES OF ETHYLENE OXIDE. TO IMPROVE FLUID DISPLACEMENT DURING DRILLING, TO REDUCE FRICTION ON THE DRILLING TOOLS AND TO DECREASE CORROSON OF THE DRILLING TOOLS TO THEREBY IMPROVE THE EFFICIENCY OF THE DRILLING PROCESS AND EXTENT THE LIFE OF SAID DRILLING TOOLS.
References Cited (Backward Citations)
US3004056A
Cited
US3155178A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-01-09 | 1970-07-11 | 1971-01-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-01-09 | 1974-07-11 | 1975-01-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-01-09 | 1978-07-11 | 1979-01-10 | $7700.00 | Window Closed / Lapsed |