US2759143A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Earth borehole investigation-signaling system
Assignee: Individual
•
Filing: 1954-07-14
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Granted: 1956-08-14
•
Expires: 1974-07-14
Abstract
No abstract record available.
Inventors
- 👤 Jan J Arps
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 04:04
CPC Classifications
E; E21; E21B; E21B47/00; E21B47/12; E21B47/14; E21B47/18; E21B47/22; E21B47/24; G; G01; G01V; G01V3/00; G01V3/18; G01V3/34; Y; Y10; Y10T; Y10T137/00; Y10T137/1842; Y10T137/1939
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
136 words
IN A SYSTEM FOR COMMUNICATING INFORMATION OF TWO TYPES FROM A RELATIVELY INACCESSIBLE LOCATION IN AN EARTH BOUREHOLE TO A POINT OUTSIDE THE BONEHOLE WHILE CONCURRENTLY EXTENDING THE BOREHOLE BY DRILLING WITH MEANS INCLUDING A HOLLOW DRILL STRING THROUGH WHICH A STREAM OF DRILLING FLUID FLOWS UNDER PRESSURE, APPARATUS COMPRISING: A SECTION OF SUCH DRILL STRING; MEANS IN THE SECTION OF DRILL STRING TO RECURRENTLY MEASURE EACH OF TWO PHYSICAL QUANTITIES AND TO PRODUCE IN SUCH STREAM PRESSURE CHANGE SIGNALS, EACH COMPRISING ONE OF A SERIES OF REGULARLY PRODUCED REFERENCE PRESSURE CHANGE SIGNAL ELEMENTS OF A GIVEN CHARACTER AND TWO INFORMATION-REPRESENTING PRESSURE CHANGE SIGNAL ELEMENTS ONE ABOVE AND THE OTHER BELOW AN AVERAGE PRESSURE VALVE AND EACH REPRESENTING A RESPECTIVE MEASURE OF SAID PHYSICAL QUANTITIES; AND MEANS OUTSIDE THE BOREHOLE FOR RECEIVING AND TRANSLATING SAID SIGNALS.
Claim 2
Dependent Claim
136 words
IN A SYSTEM FOR COMMUNICATING INFORMATION OF TWO TYPES FROM A RELATIVELY INACCESSIBLE LOCATION IN AN EARTH BOUREHOLE TO A POINT OUTSIDE THE BONEHOLE WHILE CONCURRENTLY EXTENDING THE BOREHOLE BY DRILLING WITH MEANS INCLUDING A HOLLOW DRILL STRING THROUGH WHICH A STREAM OF DRILLING FLUID FLOWS UNDER PRESSURE, APPARATUS COMPRISING: A SECTION OF SUCH DRILL STRING; MEANS IN THE SECTION OF DRILL STRING TO RECURRENTLY MEASURE EACH OF TWO PHYSICAL QUANTITIES AND TO PRODUCE IN SUCH STREAM PRESSURE CHANGE SIGNALS, EACH COMPRISING ONE OF A SERIES OF REGULARLY PRODUCED REFERENCE PRESSURE CHANGE SIGNAL ELEMENTS OF A GIVEN CHARACTER AND TWO INFORMATION-REPRESENTING PRESSURE CHANGE SIGNAL ELEMENTS ONE ABOVE AND THE OTHER BELOW AN AVERAGE PRESSURE VALVE AND EACH REPRESENTING A RESPECTIVE MEASURE OF SAID PHYSICAL QUANTITIES; AND MEANS OUTSIDE THE BOREHOLE FOR RECEIVING AND TRANSLATING SAID SIGNALS.
References Cited (Backward Citations)
US2380520A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-08-14 | 1960-02-13 | 1960-08-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-08-14 | 1964-02-13 | 1964-08-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-08-14 | 1968-02-13 | 1968-08-14 | $7700.00 | Window Closed / Lapsed |