Patent US3385327A successfully refreshed from Google Patents.
Patent US3773109A successfully refreshed from Google Patents.
US3773109A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrical cable and borehole logging system
Assignee: Kerr McGee Corp
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Filing: 1970-10-29
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Granted: 1973-11-20
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Expires: 1990-10-29
Abstract
Abstract Low-noise electrical cable includes a coaxial transmission line having a central conductor, a layer of insulation, and a tubular conductor sheathing the insulation, another layer of insulation sheathing the tubular conductor, a composite layer of insulated conductors and semiconductive material, two layers of semiconductive tape, and two layers of armor. In borehole radiation logging, the cable is connected to a downhole probe. Signals are transmitted to the surface along the central conductor, with the tubular conductor and armor grounded and power supplied to the probe through conductors in the composite layer. The probe includes exothermic material which is ignited to sever the cable from the probe should the probe become lodged in the borehole, for recovery of the cable.
Inventors
- 👤 H Eberline
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 20:25
CPC Classifications
G; G01; G01V; G01V5/00; G01V5/04; G01V5/045; E; E21; E21B; E21B17/00; E21B17/02; E21B17/023; E21B17/028; E21B17/0285; E21B29/00; E21B29/02; E21B47/00; E21B47/12; H; H01; H01B; H01B7/00; H01B7/04; H01B7/046
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
59 words
Borehole logging apparatus, comprising a cable having a probe end portion, a probe connected to the probe end portion of the cable, means including a mass of exothermic mixture of iron oxide and aluminum operatively associated with the probe end portion of the cable for severing the cable from the probe, and igniting means for igniting the exothermic mixture.
Claim 2
Dependent Claim
59 words
Borehole logging apparatus, comprising a cable having a probe end portion, a probe connected to the probe end portion of the cable, means including a mass of exothermic mixture of iron oxide and aluminum operatively associated with the probe end portion of the cable for severing the cable from the probe, and igniting means for igniting the exothermic mixture.
Claim 3
Dependent Claim
23 words
The apparatus of claim 1, the igniting means including an electrical resistance heater in heat exchange relationship with the mass of exothermic mixture.
Claim 4
Dependent Claim
44 words
The apparatus of claim 1, the probe including an end portion having an aperture for receiving a portion of the cable, the mass of exothermic mixture being located within the end portion of the probe and contiguous to the received portion of the cable.
Claim 5
Dependent Claim
94 words
The apparatus of claim 3, the cable including at least one layer of armor, the end portion of the probe including a cavity and a projecting member extending into the cavity and having outer surfaces, the aperture extending through the projecting member, at least a portion of the armor being peeled away from the remainder of the cable and deformed backwardly over the outer surfaces of the projecting member, and the probe including locking means pressing the deformed armor against the outer surfaces of the projecting member for locking the cable to the probe.
Claim 6
Dependent Claim
28 words
The apparatus of claim 4, the mass of exothermic mixture being located between the locking means and the projecting member in a position to sever the deformed armor.
Claim 7
Dependent Claim
35 words
The apparatus of claim 4, The locking means including a locking member having a central recess receiving the deformed armor and the projecting member, and movable means for forcing the locking member into locking position.
Claim 8
Dependent Claim
152 words
Borehole logging apparatus, comprising a cable having a probe end portion, a probe connected to the probe end portion of the cable, means including a mass of exothermic material operatively associated with the probe end portion of the cable for severing the cable from the probe, and igniting means for igniting the exothermic material, the probe receiving a portion of the cable, the mass of exothermic material being located within the probe and contiguous to the received portion of the cable, the cable including at least one layer of armor, the probe including means including surfaces defining a cavity in the probe, the end portion of the cable extending into the cavity, at least a portion of the armor being peeled away from the remainder of the cable and deformed over said surfaces, the probe including locking means pressing the deformed armor against said surfaces for locking the cable to the probe.
Claim 9
Dependent Claim
152 words
Borehole logging apparatus, comprising a cable having a probe end portion, a probe connected to the probe end portion of the cable, means including a mass of exothermic material operatively associated with the probe end portion of the cable for severing the cable from the probe, and igniting means for igniting the exothermic material, the probe receiving a portion of the cable, the mass of exothermic material being located within the probe and contiguous to the received portion of the cable, the cable including at least one layer of armor, the probe including means including surfaces defining a cavity in the probe, the end portion of the cable extending into the cavity, at least a portion of the armor being peeled away from the remainder of the cable and deformed over said surfaces, the probe including locking means pressing the deformed armor against said surfaces for locking the cable to the probe.
Claim 10
Dependent Claim
27 words
The apparatus of claim 7, the mass of exothermic material being located between the locking means and said surfaces in a position to sever the deformed armor.
Claim 11
Dependent Claim
51 words
The apparatus of claim 7, the probe including a projecting member extending into the cavity, the cable extending through the projecting member, said surfaces including outer surfaces of the projecting member, the deformed armor being deformed backwardly at an angle of nearly 180* over the outer surfaces of the projecting member.
Claim 12
Dependent Claim
27 words
The apparatus of claim 9, the mass of exothermic material being located between the locking means and said surfaces in a position to sever the deformed armor.
Claim 13
Dependent Claim
35 words
The apparatus of claim 9, the locking means including a locking member having a central recess receiving the deformed armor and the projecting member, and movable means for forcing the locking member into locking position.
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) | 1976-11-19 | 1977-05-21 | 1977-11-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-11-19 | 1981-05-21 | 1981-11-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-11-19 | 1985-05-21 | 1985-11-20 | $7700.00 | Window Closed / Lapsed |