Patent US3406766A successfully refreshed from Google Patents.
US3406766A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and devices for interconnecting subterranean boreholes
Assignee: Individual
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Filing: 1966-07-07
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Granted: 1968-10-22
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Expires: 1986-07-07
Abstract
No abstract record available.
Inventors
- 👤 Henderson John Keller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 18:53
CPC Classifications
E; E21; E21B; E21B7/00; E21B7/04; E21B7/06
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
77 words
A METHOD OF DIRECTIONALLY DRILLING A FIRST WELL TO INTERSECT A SECOND WELL COMPRISING THE STEPS OF: ESTABLISHING A MAGNETIC FIELD IN ONE OF SAID FIRST AND SECOND WELLS WITH A MAGNETIC FIELD GENERATING MEANS; DETECTING THE DIRECTION OF EMANATION OF SAID MAGNETIC FIELD WITH A MAGNETIC FIELD DIRECTION SENSING MEANS, AND ORIENTING THE COURSE OF DRILLING OF A DIRECTIONALLY CONTROLLABLE DRILLING MEANS IN SAID FIRST WELL IN RESPONSE TO SAID DETECTED DIRECTION OF SAID MAGNETIC FIELD.
Claim 2
Independent Claim
77 words
A METHOD OF DIRECTIONALLY DRILLING A FIRST WELL TO INTERSECT A SECOND WELL COMPRISING THE STEPS OF: ESTABLISHING A MAGNETIC FIELD IN ONE OF SAID FIRST AND SECOND WELLS WITH A MAGNETIC FIELD GENERATING MEANS; DETECTING THE DIRECTION OF EMANATION OF SAID MAGNETIC FIELD WITH A MAGNETIC FIELD DIRECTION SENSING MEANS, AND ORIENTING THE COURSE OF DRILLING OF A DIRECTIONALLY CONTROLLABLE DRILLING MEANS IN SAID FIRST WELL IN RESPONSE TO SAID DETECTED DIRECTION OF SAID MAGNETIC FIELD.
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) | 1971-10-22 | 1972-04-22 | 1972-10-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-10-22 | 1976-04-22 | 1976-10-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-10-22 | 1980-04-22 | 1980-10-22 | $7700.00 | Window Closed / Lapsed |