US3190372A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Methods and apparatus for drilling bore holes
Assignee: Sunoco Inc
•
Filing: 1962-03-05
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Granted: 1965-06-22
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Expires: 1982-03-05
Abstract
No abstract record available.
Inventors
- 👤 Ford L Johnson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 19:30
CPC Classifications
E; E21; E21B; E21B7/00; E21B7/007
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
172 words
THE METHOD OF DRILLING A BORE HOLE THROUGH EARTH STRATA COMPRISING THE STEPS OF: EFFECTING ROTARY DRILLING WITH A HOLLOW DRILL STEM DRIVING A DRILL BIT HAVING A SOLID CENTRAL PORTION AND A NONAXIALLY ALIGNED JET OPENING TO FORM A BORE HOLE OF A FIRST DEPTH, INTRODUCING A MULTIPLE CHARGE TORPEDO INTO SAID HOLLOW DRILL STEM AT THE SURFACE OF THE BORE HOLE, EFFECTING AXIAL PASSAGE OF SAID TORPEDO DOWNWARDLY THROUGH SAID HOLLOW DRILL STEM TO THE VICINITY OF SAID BIT, ORIENTING SAID TORPEDO SO AS TO PASS AT LEAST PARTIALLY THROUGH SAID NON-AXIAL JET OPENING TO ARRIVE AT A POSITION ADJACENT THE EARTH STRATA FORMING THE BOTTOM OF SAID BORE HOLE, DETONATING A FIRST CHARGE OF SAID MULTIPLE CHARGE TORPEDO TO FORM A CAVITY IN SAID STRATA FORMING THE BOTTOM OF SAID BORE HOLE, EXPLOSIVELY PROPELLING A SECOND CHARGE OF SAID MULTIPLE CHARGE TORPEDO INTO SAID CAVITY, DETONATING SAID SECOND CHARGE TO EFFECT FRACTURING OF THE MATERIAL FORMING SAID CAVITY, AND CONTINUING ROTARY DRILLING THROUGH SAID STRATA BY SAID DRILL BIT.
Claim 2
Independent Claim
172 words
THE METHOD OF DRILLING A BORE HOLE THROUGH EARTH STRATA COMPRISING THE STEPS OF: EFFECTING ROTARY DRILLING WITH A HOLLOW DRILL STEM DRIVING A DRILL BIT HAVING A SOLID CENTRAL PORTION AND A NONAXIALLY ALIGNED JET OPENING TO FORM A BORE HOLE OF A FIRST DEPTH, INTRODUCING A MULTIPLE CHARGE TORPEDO INTO SAID HOLLOW DRILL STEM AT THE SURFACE OF THE BORE HOLE, EFFECTING AXIAL PASSAGE OF SAID TORPEDO DOWNWARDLY THROUGH SAID HOLLOW DRILL STEM TO THE VICINITY OF SAID BIT, ORIENTING SAID TORPEDO SO AS TO PASS AT LEAST PARTIALLY THROUGH SAID NON-AXIAL JET OPENING TO ARRIVE AT A POSITION ADJACENT THE EARTH STRATA FORMING THE BOTTOM OF SAID BORE HOLE, DETONATING A FIRST CHARGE OF SAID MULTIPLE CHARGE TORPEDO TO FORM A CAVITY IN SAID STRATA FORMING THE BOTTOM OF SAID BORE HOLE, EXPLOSIVELY PROPELLING A SECOND CHARGE OF SAID MULTIPLE CHARGE TORPEDO INTO SAID CAVITY, DETONATING SAID SECOND CHARGE TO EFFECT FRACTURING OF THE MATERIAL FORMING SAID CAVITY, AND CONTINUING ROTARY DRILLING THROUGH SAID STRATA BY SAID DRILL BIT.
References Cited (Backward Citations)
US1585664A
Cited
US1511488A
Cited
US2307729A
Cited
US2416077A
Cited
US2809585A
Cited
US2910000A
Cited
US2869825A
Cited
US2898085A
Cited
US3047796A
Cited
US3070010A
Cited
US3083778A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-06-21 | 1968-12-21 | 1969-06-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-06-21 | 1972-12-21 | 1973-06-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-06-21 | 1976-12-21 | 1977-06-22 | $7700.00 | Window Closed / Lapsed |