Patent US4534020A successfully refreshed from Google Patents.
US4534020A
Expired / Lapsed
US
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Apparatus and method for detecting seismic waves
Assignee: Phillips Petroleum Co
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Filing: 1981-10-19
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Granted: 1985-08-06
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Expires: 2001-10-19
Abstract
Abstract Disclosed is an apparatus for transducing seismic signals and a method for placing said apparatus for detecting seismic signals. The apparatus comprises at least one geophone preferably embedded in a polymeric material contained in a tubular member. A lower portion of the tubular member preferably contains ballast. The tubular member is preferably cemented into a borehole.
Inventors
- 👤 John T. O'Brien
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 17:32
CPC Classifications
G; G01; G01V; G01V1/00; G01V1/16; Y; Y10; Y10S; Y10S181/00; Y10S181/40; Y10S181/401; Y10S367/00; Y10S367/911
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
289 words
An apparatus useful in down hole detection of seismic waves comprising: (a) a thermoplastic, tubular member having a first end, a second end, and a longitudinal axis; (b) a first closure means positioned at the first end of the thermoplastic, tubular member, isolating the inside of the tubular member from the outside; (c) first geophone having a principal axis of sensitivity positioned so that its principal axis of sensitivity is generally parallel to the longitudinal axis of the tubular member; (d) a second closure means positioned at the second end of the thermoplastic, tubular member and isolating the inside of the tubular member from the outside; (e) a first pair of wire leads extending from the first geophone and through the second closure means; (f) a second geophone having a principal axis of sensitivity positioned with its principal axis of sensitivity at about a right angle with the principal axis of sensitivity of the first geophone; (g) a second pair of wire leads extending from the second geophone and through the second closure means; (h) a third geophone having a principal axis of sensitivity positioned with its principal axis of sensitivity at about a right angle with the principal axis of sensitivity of the first geophone and the principal axis of sensitivity of the second geophone; (i) a third pair of wire leads extending from the third geophone and through the second closure means; (j) a mass of polymeric material surrounding each of the first, second and third geophones, the geophones being embedded in said polymeric material and (k) a mass of a second material positioned in a lower portion of the thermoplastic, tubular member, said second material having a density greater than that of the anticipated borehole fluids.
Claim 2
Independent Claim
289 words
An apparatus useful in down hole detection of seismic waves comprising: (a) a thermoplastic, tubular member having a first end, a second end, and a longitudinal axis; (b) a first closure means positioned at the first end of the thermoplastic, tubular member, isolating the inside of the tubular member from the outside; (c) first geophone having a principal axis of sensitivity positioned so that its principal axis of sensitivity is generally parallel to the longitudinal axis of the tubular member; (d) a second closure means positioned at the second end of the thermoplastic, tubular member and isolating the inside of the tubular member from the outside; (e) a first pair of wire leads extending from the first geophone and through the second closure means; (f) a second geophone having a principal axis of sensitivity positioned with its principal axis of sensitivity at about a right angle with the principal axis of sensitivity of the first geophone; (g) a second pair of wire leads extending from the second geophone and through the second closure means; (h) a third geophone having a principal axis of sensitivity positioned with its principal axis of sensitivity at about a right angle with the principal axis of sensitivity of the first geophone and the principal axis of sensitivity of the second geophone; (i) a third pair of wire leads extending from the third geophone and through the second closure means; (j) a mass of polymeric material surrounding each of the first, second and third geophones, the geophones being embedded in said polymeric material and (k) a mass of a second material positioned in a lower portion of the thermoplastic, tubular member, said second material having a density greater than that of the anticipated borehole fluids.
Claim 3
Dependent Claim
17 words
Apparatus as in claim 1 wherein the apparatus is rigidly positioned in a borehole in the earth.
Claim 4
Dependent Claim
22 words
Apparatus as in claim 2 wherein the apparatus is embedded in a mass of cement contained in a borehole in the earth.
Claim 5
Dependent Claim
80 words
A method comprising: (a) positioning an apparatus of claim 1 in a borehole; (b) cementing the apparatus in position in the borehole; (c) positioning a seismic source adjacent the upper end of the borehole; (d) propagating a seismic signal from the seismic source; (e) receiving the seismic signal without reflection at the at least one geophone; and (f) establishing, in response to the thus received signal, a source signature signal representative of the seismic signal propagated from the seismic source.
Claim 6
Dependent Claim
22 words
A method as in claim 4 wherein the source signature signal is derived from signals produced by each of the three geophones.
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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) | 1988-08-05 | 1989-02-04 | 1989-08-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-08-05 | 1993-02-04 | 1993-08-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-08-05 | 1997-02-04 | 1997-08-06 | $7700.00 | Window Closed / Lapsed |