Patent US4031750A successfully refreshed from Google Patents.
US4031750A
Expired / Lapsed
US
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Apparatus for logging inclined earth boreholes
Assignee: Western Atlas International Inc
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Filing: 1976-09-02
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Granted: 1977-06-28
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Expires: 1996-09-02
Abstract
Abstract An elongated borehole logging instrument includes a permanent magnet linear reciprocating motor. The motor powers a sliding sleeve which has attached to its outer perimeter a series of reversible vanes. The vanes engage the mud cake or the borehole wall and thus generate a force opposite to the direction of the vane slant. The motor has a stationary electromagnetic field comprised of a plurality of coils connected to the control electronics. The floating outer sleeve has permanent magnets all oriented in the same direction. As the coils are pulsed alternatingly, the magnets are either repulsed or attracted to thus generate a reciprocating motion which transferred to the vanes moves the tool up or down, depending upon the position of the reversing actuator.
Inventors
- 👤 Arthur H. Youmans
- 👤 Heinz D. Lichtenberg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 20:32
CPC Classifications
E; E21; E21B; E21B23/00; E21B23/14
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
119 words
Apparatus for traversing an inclined earth borehole, comprising: an elongated instrument adapted to traverse an earth borehole, said instrument including a longitudinal support mandrel; a plurality of electro-magnets spaced along the length of said mandrel; a sliding sleeve encircling said mandrel and having a plurality of permanent magnets spaced along the length of said sleeve; a plurality of flexible vanes attached to, and spaced along the length of, said sleeve, said vanes having a given angle with respect to said sleeve; and means to pulse said electro-magnets with electrical pulses to thereby cause said sleeve to reciprocate with respect to the mandrel and impart motion to the instrument in a direction away from the angled slant of the vanes.
Claim 2
Dependent Claim
119 words
Apparatus for traversing an inclined earth borehole, comprising: an elongated instrument adapted to traverse an earth borehole, said instrument including a longitudinal support mandrel; a plurality of electro-magnets spaced along the length of said mandrel; a sliding sleeve encircling said mandrel and having a plurality of permanent magnets spaced along the length of said sleeve; a plurality of flexible vanes attached to, and spaced along the length of, said sleeve, said vanes having a given angle with respect to said sleeve; and means to pulse said electro-magnets with electrical pulses to thereby cause said sleeve to reciprocate with respect to the mandrel and impart motion to the instrument in a direction away from the angled slant of the vanes.
Claim 3
Dependent Claim
25 words
The apparatus according to claim 1, including in addition thereto, means to vary the slant of the vanes while the instrument is in the borehole.
Claim 4
Dependent Claim
26 words
The apparatus according to claim 1, including in addition thereto, a well logging module in said instrument for determining characteristics of the formations surrounding the borehole.
Claim 5
Dependent Claim
81 words
Apparatus for traversing an inclined earth borehole, comprising: an elongated instrument adapted to traverse an earth borehole, said instrument including a longitudinal support mandrel; a sliding sleeve encircling said support mandrel; at least one vane attached to said sleeve and having a given angle with respect to said sleeve; and means to reciprocate said sleeve with respect to said mandrel and thereby impart motion to the instrument in a direction away from the angled slant of said at least one vane.
Claim 6
Dependent Claim
81 words
Apparatus for traversing an inclined earth borehole, comprising: an elongated instrument adapted to traverse an earth borehole, said instrument including a longitudinal support mandrel; a sliding sleeve encircling said support mandrel; at least one vane attached to said sleeve and having a given angle with respect to said sleeve; and means to reciprocate said sleeve with respect to said mandrel and thereby impart motion to the instrument in a direction away from the angled slant of said at least one vane.
Claim 7
Dependent Claim
28 words
The apparatus according to claim 4, including in addition thereto, means to vary the slant of said at least one vane while the instrument is in the borehole.
Claim 8
Dependent Claim
26 words
The apparatus according to claim 5, including in addition thereto, a well logging module in said instrument for determining characteristics of the formations surrounding the borehole.
Claim 9
Dependent Claim
30 words
The apparatus according to claim 4, including in addition thereto, spring means on at least one end of said sleeve for facilitating the floating of said sleeve about said mandrel.
References Cited (Backward Citations)
US2776564A
Cited
US3670566A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-06-27 | 1980-12-27 | 1981-06-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-06-27 | 1984-12-27 | 1985-06-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-06-27 | 1988-12-27 | 1989-06-28 | $7700.00 | Window Closed / Lapsed |