US3176407A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Drift indicator
Assignee: VARNEY ENG
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Filing: 1960-03-11
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Granted: 1965-04-06
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Expires: 1980-03-11
Abstract
No abstract record available.
Inventors
- 👤 Alder Robert Lee
- 👤 Paul J Americh
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 11:48
CPC Classifications
E; E21; E21B; E21B47/00; E21B47/02; E21B47/022; E21B47/0236
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
173 words
IN A SIGNALLING DRIFT INDICATOR FOR USE IN A DOWNWARD STREAM OF DRILLING FLUID IN A DRILL STRING IN A WELL BORE WHEREIN THE DRIFT INDICATOR HAS A HOUSING FOR POSITIONING IN THE DRILL STRING LONGITUDINALLY THEREOF, A PLUNGER PROTRUDING LONGITUDINALLY FROM THE HOUSING FOR EXTENSION AND RETRACTION RELATIVE THERETO TO GENERATE A SERIES OF SPACED SIGNALS BY DOWNWARD MOVEMENT IN RESPONSE TO FORCE BY THE STREAM OF DRILLING FLUID, AND MEANS TO URGE THE PLUNGER UPWARD, THE COMBINATION THEREWITH OF; A PENDULUM IN SAID HOUSING MOVABLE LONGITUDINALLY IN RESPONSE TO THE UPWARD MOVEMENT OF THE PLUNGER; MEANS RSPONSIVE TO THE INCLINATION OF THE HOUSING RELATIVE TO THE PENDULUM TO LIMIT THE MOVEMENT OF THE PENDULUM IN ACCORDANCE WITH THE INCLINATION OF THE HOUSING; AND MEANS RESPONSIVE TO THE PENDULUM TO LIMIT THE UPWARD MOVEMENT OF THE PLUNGER INVERSELY AS THE MAGNITUDE OF MOVEMENT OF THE PENDULUM WHEREBY THE NUMBER OF SIGNALS GENERATED BY THE RETURN DOWNWARD MOVEMENT OF THE PLUNGER VARIES DIRECTLY WITH THE DEGREE OF INCLINATION OF THE HOUSING FROM VERTICAL.
Claim 2
Dependent Claim
173 words
IN A SIGNALLING DRIFT INDICATOR FOR USE IN A DOWNWARD STREAM OF DRILLING FLUID IN A DRILL STRING IN A WELL BORE WHEREIN THE DRIFT INDICATOR HAS A HOUSING FOR POSITIONING IN THE DRILL STRING LONGITUDINALLY THEREOF, A PLUNGER PROTRUDING LONGITUDINALLY FROM THE HOUSING FOR EXTENSION AND RETRACTION RELATIVE THERETO TO GENERATE A SERIES OF SPACED SIGNALS BY DOWNWARD MOVEMENT IN RESPONSE TO FORCE BY THE STREAM OF DRILLING FLUID, AND MEANS TO URGE THE PLUNGER UPWARD, THE COMBINATION THEREWITH OF; A PENDULUM IN SAID HOUSING MOVABLE LONGITUDINALLY IN RESPONSE TO THE UPWARD MOVEMENT OF THE PLUNGER; MEANS RSPONSIVE TO THE INCLINATION OF THE HOUSING RELATIVE TO THE PENDULUM TO LIMIT THE MOVEMENT OF THE PENDULUM IN ACCORDANCE WITH THE INCLINATION OF THE HOUSING; AND MEANS RESPONSIVE TO THE PENDULUM TO LIMIT THE UPWARD MOVEMENT OF THE PLUNGER INVERSELY AS THE MAGNITUDE OF MOVEMENT OF THE PENDULUM WHEREBY THE NUMBER OF SIGNALS GENERATED BY THE RETURN DOWNWARD MOVEMENT OF THE PLUNGER VARIES DIRECTLY WITH THE DEGREE OF INCLINATION OF THE HOUSING FROM VERTICAL.
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) | 1968-04-05 | 1968-10-05 | 1969-04-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-04-05 | 1972-10-05 | 1973-04-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-04-05 | 1976-10-05 | 1977-04-06 | $7700.00 | Window Closed / Lapsed |