US4136747A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and means for reduction of oxygen content in drilling fluid
Assignee: Loffland Brothers Co
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Filing: 1976-12-17
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Granted: 1979-01-30
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Expires: 1996-12-17
Abstract
Abstract A method and means for using nitrogen exhaust gases or gaseous mixtures of combustible products for reduction of oxygen in drilling fluids during the drilling of well bores and which comprises utilizing nitrogen from normally waste exhaust gases or the like, injecting the nitrogen and other gases present into the usual drilling muds for replacing the oxygen contents of the drilling muds with the nitrogen gas, whereby corrosive action of the drilling muds is greatly reduced or substantially eliminated.
Inventors
- 👤 Harvey E. Mallory
- 👤 James W. Ward
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 05:17
CPC Classifications
E; E21; E21B; E21B21/00; E21B21/06; E21B21/063; E21B21/067; E21B21/14
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
70 words
A method for drilling a well bore using drilling fluids and which comprises the displacement of substantially all of the oxygen in the drilling fluid with a suitable inert gas for reduction of corrosion in the drilling operation, and providing an atmosphere of the inert gas adjacent substantially any exposed surface of said drilling fluids for reducing contamination of the drilling fluids from the oxygen content of the ambient air.
Claim 2
Independent Claim
70 words
A method for drilling a well bore using drilling fluids and which comprises the displacement of substantially all of the oxygen in the drilling fluid with a suitable inert gas for reduction of corrosion in the drilling operation, and providing an atmosphere of the inert gas adjacent substantially any exposed surface of said drilling fluids for reducing contamination of the drilling fluids from the oxygen content of the ambient air.
Claim 3
Dependent Claim
13 words
A method as set forth in claim 1 wherein the gas is nitrogen.
Claim 4
Dependent Claim
26 words
A method as set forth in claim 1 wherein the gas is recovered from normally wasted exhaust gases from natural gas, gasoline, or diesel burning engines.
Claim 5
Dependent Claim
16 words
A method as set forth in claim 1 wherein the gas is recovered from combustible products.
Claim 6
Independent Claim
130 words
A method for drilling a wall bore using drilling fluids and which comprises cleaning the exhaust gases from combustible products for removal of debris therefrom, directing said cleaned gases into the drilling mud reservoirs, injecting the cleaned gas directly into said drilling fluids whereby the nitrogen components of the gases replaces the oxygen content of the drilling fluid for substantially eliminating the oxygen content of the drilling fluids, and wherein the step of cleaning the exhaust gases comprises initially directing the exhaust gases into a filter chamber, dispersing the gases through the filter chamber for removal of debris from the gases, bubbling the filtered gases upwardly through a liquid bath for removal of additional debris, and knocking out any water or remaining debris from the gases leaving the liquid bath.
Claim 7
Independent Claim
130 words
A method for drilling a wall bore using drilling fluids and which comprises cleaning the exhaust gases from combustible products for removal of debris therefrom, directing said cleaned gases into the drilling mud reservoirs, injecting the cleaned gas directly into said drilling fluids whereby the nitrogen components of the gases replaces the oxygen content of the drilling fluid for substantially eliminating the oxygen content of the drilling fluids, and wherein the step of cleaning the exhaust gases comprises initially directing the exhaust gases into a filter chamber, dispersing the gases through the filter chamber for removal of debris from the gases, bubbling the filtered gases upwardly through a liquid bath for removal of additional debris, and knocking out any water or remaining debris from the gases leaving the liquid bath.
Claim 8
Independent Claim
60 words
A method of reduction of oxygen content in fluids in contact with corrosive materials which comprises injecting suitable gases directly into the fluid for displacement of substantially all of the oxygen content of the fluid, and maintaining an atmosphere of said suitable gas adjacent any exposed surface of the fluids for precluding admission of additional oxygen content into the fluids.
Claim 9
Independent Claim
60 words
A method of reduction of oxygen content in fluids in contact with corrosive materials which comprises injecting suitable gases directly into the fluid for displacement of substantially all of the oxygen content of the fluid, and maintaining an atmosphere of said suitable gas adjacent any exposed surface of the fluids for precluding admission of additional oxygen content into the fluids.
Claim 10
Dependent Claim
26 words
A method as set forth in claim 6 wherein the gases are recovered from normally wasted exhaust gases from natural gas, gasoline, or diesel burning engines.
Claim 11
Dependent Claim
16 words
A method as set forth in claim 6 wherein the gases are recovered from combustible products.
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) | 1982-01-29 | 1982-07-31 | 1983-01-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-01-29 | 1986-07-31 | 1987-01-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-01-29 | 1990-07-31 | 1991-01-30 | $7700.00 | Window Closed / Lapsed |