US3303894A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Means and method for controlling thrust or weight on drilling tool
Assignee: Individual
•
Filing: 1964-03-27
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Granted: 1967-02-14
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Expires: 1984-03-27
Abstract
No abstract record available.
Inventors
- 👤 Justin A Varney
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 20:06
CPC Classifications
E; E21; E21B; E21B49/00; E21B49/003; E21B17/00; E21B17/02; E21B17/04; E21B17/07; E21B44/00; E21B44/005
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
164 words
A METHOD OF CONTROLLING THE THRUST ON A DRILL BIT IN A WELL BORE CHARACTERIZED BY THE USE OF A DRILL STRING WEIGHT INDICATOR AND A DRILL STRING INCORPORATING A PAIR OF TELESCOPING SECTIONS WITH RESILIENT YIELDING MEANS INTERPOSED BETWEEN THE TWO SECTIONS FOR COMPRESSION PROGRESSIVELY BY PROGRESSIVE CONTRACTION OF THE PAIR OF TELESCOPING SECTIONS, SAID METHOD INCLUDING THE STEPS OF: WITH THE DRILL BIT OFF BOTTOM AND THE INDICATOR INDICATING MAXIMUM WEIGHT, LOWERING THE DRILL STRING UNTIL A DROP IN THE INDICATED WEIGHT INDICATES BOTTOMING OF THE DRILL STRING AND THE IMPOSITION ON THE DRILL BIT OF THE WEIGHT OF THE DRILL STRING BELOW THE PAIR OF TELESCOPING SECTIONS, AND THEN LOWERING THE DRILL STRING BY A GIVEN AMOUNT WITHIN THE RANGE OF CONTRACTION OF THE TWO TELESCOPING SECTIONS TO CAUSE THE WEIGHT OF THE DRILL STRING ABOVE THE PAIR OF SECTIONS TO COMPRESS THE YIELDING MEANS TO A GIVEN DEGREE TO IMPOSE A GIVEN MAGNITUDE OF ADDITIONAL WEIGHT ON THE DRILL BIT.
Claim 2
Independent Claim
164 words
A METHOD OF CONTROLLING THE THRUST ON A DRILL BIT IN A WELL BORE CHARACTERIZED BY THE USE OF A DRILL STRING WEIGHT INDICATOR AND A DRILL STRING INCORPORATING A PAIR OF TELESCOPING SECTIONS WITH RESILIENT YIELDING MEANS INTERPOSED BETWEEN THE TWO SECTIONS FOR COMPRESSION PROGRESSIVELY BY PROGRESSIVE CONTRACTION OF THE PAIR OF TELESCOPING SECTIONS, SAID METHOD INCLUDING THE STEPS OF: WITH THE DRILL BIT OFF BOTTOM AND THE INDICATOR INDICATING MAXIMUM WEIGHT, LOWERING THE DRILL STRING UNTIL A DROP IN THE INDICATED WEIGHT INDICATES BOTTOMING OF THE DRILL STRING AND THE IMPOSITION ON THE DRILL BIT OF THE WEIGHT OF THE DRILL STRING BELOW THE PAIR OF TELESCOPING SECTIONS, AND THEN LOWERING THE DRILL STRING BY A GIVEN AMOUNT WITHIN THE RANGE OF CONTRACTION OF THE TWO TELESCOPING SECTIONS TO CAUSE THE WEIGHT OF THE DRILL STRING ABOVE THE PAIR OF SECTIONS TO COMPRESS THE YIELDING MEANS TO A GIVEN DEGREE TO IMPOSE A GIVEN MAGNITUDE OF ADDITIONAL WEIGHT ON THE DRILL BIT.
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) | 1970-02-13 | 1970-08-15 | 1971-02-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-02-13 | 1974-08-15 | 1975-02-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-02-13 | 1978-08-15 | 1979-02-14 | $7700.00 | Window Closed / Lapsed |