US3111178A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Gas drilling method
Assignee: Armour and Co
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Filing: 1958-12-31
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Granted: 1963-11-19
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Expires: 1978-12-31
Abstract
No abstract record available.
Inventors
- 👤 Byron E Marsh
- 👤 Jack E Haughn
- 👤 Richard J Michelini
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 19:22
CPC Classifications
E; E21; E21B; E21B21/00; E21B21/14
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
115 words
IN A WELL DRILLING METHOD WHEREIN GAS UNDER PRESSURE IS CIRCULATED THROUGH A BORE HOLE FOR THE REMOVAL OF WATER AND CUTTINGS THEREFROM, THE IMPROVEMENT COMPRISING INJECTING CONTROLLED AMOUNTS OF A SURFACE-ACTIVE, CORROSION-INHIBITING LIFTING AGENT TO FROM AN AERATED COLUMN FOR LIFTING THE WATER AND CUTTINGS FROM THE WELL WHILE AT THE SAME TIME INHIBITING CORROSION OF PARTS IN CONTACT WITH THE AIR-WATER MIXTURE, IN SUFFICIENT QUANTITY TO PRODUCE AN AQEUOUS BLOW-LINE EFFLUENT HAVING A LIFTING AGENT CONCENTRATION WITHIN THE RANGE OF 0.04 TO 0.2%, SAID AGENT COMPRISING A WATER-MISCIBLE SOLUTION OF AN ALKYL TRIMETHYL QUATERNARY AMMONIUM SALT HAVING AN ALKYL GROUP WITH A CHAIN LENGTH WITHIN THE RANGE OF 8 TO 18 CARBON ATOMS.
Claim 2
Dependent Claim
115 words
IN A WELL DRILLING METHOD WHEREIN GAS UNDER PRESSURE IS CIRCULATED THROUGH A BORE HOLE FOR THE REMOVAL OF WATER AND CUTTINGS THEREFROM, THE IMPROVEMENT COMPRISING INJECTING CONTROLLED AMOUNTS OF A SURFACE-ACTIVE, CORROSION-INHIBITING LIFTING AGENT TO FROM AN AERATED COLUMN FOR LIFTING THE WATER AND CUTTINGS FROM THE WELL WHILE AT THE SAME TIME INHIBITING CORROSION OF PARTS IN CONTACT WITH THE AIR-WATER MIXTURE, IN SUFFICIENT QUANTITY TO PRODUCE AN AQEUOUS BLOW-LINE EFFLUENT HAVING A LIFTING AGENT CONCENTRATION WITHIN THE RANGE OF 0.04 TO 0.2%, SAID AGENT COMPRISING A WATER-MISCIBLE SOLUTION OF AN ALKYL TRIMETHYL QUATERNARY AMMONIUM SALT HAVING AN ALKYL GROUP WITH A CHAIN LENGTH WITHIN THE RANGE OF 8 TO 18 CARBON ATOMS.
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) | 1966-11-18 | 1967-05-20 | 1967-11-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-11-18 | 1971-05-20 | 1971-11-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-11-18 | 1975-05-20 | 1975-11-19 | $7700.00 | Window Closed / Lapsed |