US2651500A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Art of drilling wells
Assignee: Texaco Development Corp
•
Filing: 1948-05-04
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Granted: 1953-09-08
•
Expires: 1968-05-04
Abstract
No abstract record available.
Inventors
- 👤 Charles F Teichmann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 19:27
CPC Classifications
C; C09; C09K; C09K8/00; C09K8/02; C09K8/04; C09K8/14; C09K8/18; C09K8/22; Y; Y10; Y10S; Y10S435/00; Y10S435/8215; Y10S435/822; Y10S435/842; Y10S507/00; Y10S507/927; Y10S507/928
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
125 words
IN THE ART OF DRILLING AND CONTROLLING WELLS IN WHICH A DRILLING MUD IS CIRCULATED IN THE BOREHOLE AND A MUD CAKE IS FORMED ON THE WALLS THEREOF, THE PROCESS COMPRISING THE STEPS OF INCORPORATING IN THE MUD A MATERIAL SELECTED FROM THE GROUP CONSISTING OF CARBOHYDRATES AND PROTEINS, SAID MATERIAL BEING CAPABLE OF FORMING A SOLID CONSTITUENT OF SAID MUD CAKE AND OF BEING METABOLIZED BY MICROORGANISMS TO SOLUBLE PRODUCTS, FORMING A MUD CAKE ON THE WALLS OF THE BORE HOLE, SUBSEQUENTLY INOCULATING THE MUD CAKE WITH BACTERIA OF THE CLOSTRIDIUM GENUS AND EFFECTING CONVERSION OF SAID MATERIAL TO SOLUBLE PRODUCTS BY THE ACTION OF SAID BACTERIA WHEREBY SAID MUD CAKE IS RENDERED PERMEABLE WHILE STILL RETAINED ON THE WALLS OF THE BORE HOLE.
Claim 2
Dependent Claim
125 words
IN THE ART OF DRILLING AND CONTROLLING WELLS IN WHICH A DRILLING MUD IS CIRCULATED IN THE BOREHOLE AND A MUD CAKE IS FORMED ON THE WALLS THEREOF, THE PROCESS COMPRISING THE STEPS OF INCORPORATING IN THE MUD A MATERIAL SELECTED FROM THE GROUP CONSISTING OF CARBOHYDRATES AND PROTEINS, SAID MATERIAL BEING CAPABLE OF FORMING A SOLID CONSTITUENT OF SAID MUD CAKE AND OF BEING METABOLIZED BY MICROORGANISMS TO SOLUBLE PRODUCTS, FORMING A MUD CAKE ON THE WALLS OF THE BORE HOLE, SUBSEQUENTLY INOCULATING THE MUD CAKE WITH BACTERIA OF THE CLOSTRIDIUM GENUS AND EFFECTING CONVERSION OF SAID MATERIAL TO SOLUBLE PRODUCTS BY THE ACTION OF SAID BACTERIA WHEREBY SAID MUD CAKE IS RENDERED PERMEABLE WHILE STILL RETAINED ON THE WALLS OF THE BORE HOLE.
References Cited (Backward Citations)
US1998756A
Cited
US2259419A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-09-07 | 1957-03-09 | 1957-09-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-09-07 | 1961-03-09 | 1961-09-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-09-07 | 1965-03-09 | 1965-09-08 | $7700.00 | Window Closed / Lapsed |