Patent US3851101A successfully refreshed from Google Patents.
Patent US3876971A successfully refreshed from Google Patents.
US3876971A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Precision seismology
Assignee: Gulf Research and Development Co
•
Filing: 1973-09-28
•
Granted: 1975-04-08
•
Expires: 1993-09-28
Abstract
Abstract An improved overall seismic system in which a reproducible seismic source is located below the near surface inhomogeneous layers. A vertical traverse is made in a borehole below the near surface inhomogeneous layers. A detector is located at a desired location in the borehole clamped in position and tested before the seismic source is actuated.
Inventors
- 👤 Paul C Wuenschel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 15:52
CPC Classifications
G; G01; G01V; G01V1/00; G01V1/40; G01V1/42; G01V1/02; G01V1/104
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
147 words
A method of seismic exploration comprising the steps of clamping detector means in a detector hole below the near surface inhomogeneous layers; firing a charge of predetermined strength at a depth below the near surface inhomogeneous layers in a reproducible shot hole laterally spaced from the detector hole; recording the energy from said charge as returned from deeper strata of interest by said detector means clamped in said detector hole; moving said detector means to a plurality of different depths below the near surface inhomogeneous layers in the detector hole to traverse the detector hole; and at each of said different depths clamping the detector means in said detector hole, firing a charge of predetermined strength at the same depth in said reproducible shot hole and recording the energy from said charge as returned from deeper strata of interest from said detector means in said detector hole.
Claim 2
Independent Claim
147 words
A method of seismic exploration comprising the steps of clamping detector means in a detector hole below the near surface inhomogeneous layers; firing a charge of predetermined strength at a depth below the near surface inhomogeneous layers in a reproducible shot hole laterally spaced from the detector hole; recording the energy from said charge as returned from deeper strata of interest by said detector means clamped in said detector hole; moving said detector means to a plurality of different depths below the near surface inhomogeneous layers in the detector hole to traverse the detector hole; and at each of said different depths clamping the detector means in said detector hole, firing a charge of predetermined strength at the same depth in said reproducible shot hole and recording the energy from said charge as returned from deeper strata of interest from said detector means in said detector hole.
Claim 3
Dependent Claim
22 words
A method as set forth in claim 1 including the step of monitoring the energy received at the surface from the charges.
Claim 4
Dependent Claim
46 words
A method as set forth in claim 1 including the steps of firing a cap shot at the surface, and recording energy from the cap shot as returned from the detector means clamped in the detector hole at intervals in the traverse of the detector hole.
Claim 5
Dependent Claim
36 words
A method as set forth in claim 1 including the step of testing the coupling of the detector to the wall of the detector hole at each position in the traverse prior to firing the charge.
Claim 6
Dependent Claim
39 words
A method as set forth in claim 1 characterized by during the period the charge is fired and energy from the charge is recorded isolating the detectors from vibrations in cable extending up the borehole from the detector means.
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) | 1978-04-07 | 1978-10-07 | 1979-04-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-04-07 | 1982-10-07 | 1983-04-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-04-07 | 1986-10-07 | 1987-04-08 | $7700.00 | Window Closed / Lapsed |