US3155176A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Bore hole apparatus for marking drilling mud
Assignee: Sunoco Inc
•
Filing: 1960-12-19
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Granted: 1964-11-03
•
Expires: 1980-12-19
Abstract
No abstract record available.
Inventors
- 👤 John D Bennett
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 12:11
CPC Classifications
E; E21; E21B; E21B21/00; E21B21/08
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
155 words
BORE HOLE DRILLING APPARATUS COMPRISING A HOLLOW DRILL STEM HAVING A LONGITUDINAL INTERNAL BORE, MEANS DEFINING A CHAMBER IN SAID DRILL STEM, A SUPPLY OF FLUID DYE CONTAINED WITHIN SAID CHAMBER IN SAID DRILL STEM, PISTON MEANS MOVABLY MOUNTED IN SAID CHAMBER, SAID PISTON MEANS HAVING OPPOSED RESPONSIVE SIDES, MEANS FOR APPLYING PRESSURE IN SAID INTERNAL BORE OF SAID DRILL STEM TO ONE OF SAID SIDES TO URGE THE PISTON MEANS IN ONE DIRECTION, MEANS FOR APPLYING PRESSURE AT THE EXTERIOR OF THE DRILL STEM TO THE OTHER OF SAID SIDES TO URGE THE PISTON MEANS IN THE OPPOSITE DIRECTION, PASSAGEWAY MEANS PROVIDING COMMUNICATION BETWEEN SAID CHAMBER AND THE BORE HOLE, SAID PISTON MEANS BEING MOVABLE INTO SAID CHAMBER TO FORCE THE DYE THEREFROM INTO THE BORE HOLE THROUGH SAID PASSAGEWAY MEANS IN RESPONSE TO THE OCCURRENCE OF A PRESSURE IN SAID INTERNAL BORE GREATER THAN THE PRESSURE AT THE EXTERIOR OF SAID DRILL STEM.
Claim 2
Dependent Claim
155 words
BORE HOLE DRILLING APPARATUS COMPRISING A HOLLOW DRILL STEM HAVING A LONGITUDINAL INTERNAL BORE, MEANS DEFINING A CHAMBER IN SAID DRILL STEM, A SUPPLY OF FLUID DYE CONTAINED WITHIN SAID CHAMBER IN SAID DRILL STEM, PISTON MEANS MOVABLY MOUNTED IN SAID CHAMBER, SAID PISTON MEANS HAVING OPPOSED RESPONSIVE SIDES, MEANS FOR APPLYING PRESSURE IN SAID INTERNAL BORE OF SAID DRILL STEM TO ONE OF SAID SIDES TO URGE THE PISTON MEANS IN ONE DIRECTION, MEANS FOR APPLYING PRESSURE AT THE EXTERIOR OF THE DRILL STEM TO THE OTHER OF SAID SIDES TO URGE THE PISTON MEANS IN THE OPPOSITE DIRECTION, PASSAGEWAY MEANS PROVIDING COMMUNICATION BETWEEN SAID CHAMBER AND THE BORE HOLE, SAID PISTON MEANS BEING MOVABLE INTO SAID CHAMBER TO FORCE THE DYE THEREFROM INTO THE BORE HOLE THROUGH SAID PASSAGEWAY MEANS IN RESPONSE TO THE OCCURRENCE OF A PRESSURE IN SAID INTERNAL BORE GREATER THAN THE PRESSURE AT THE EXTERIOR OF SAID DRILL STEM.
References Cited (Backward Citations)
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US2457960A
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US2461164A
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US2703697A
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US2906504A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-11-03 | 1968-05-04 | 1968-11-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-11-03 | 1972-05-04 | 1972-11-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-11-03 | 1976-05-04 | 1976-11-03 | $7700.00 | Window Closed / Lapsed |