US3719239A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Up-hole signaling device
Assignee: Texaco Inc
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Filing: 1971-08-04
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Granted: 1973-03-06
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Expires: 1991-08-04
Abstract
Abstract In borehole drilling which employs a bit having at least one passage for drilling fluid under pressure, there is apparatus to release a resilient ball that will temporarily block the passage. The blocking will cause a pressure increase that may be observed at the surface.
Inventors
- 👤 A Richter
- 👤 J Bruner
- 👤 P Cox
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 20:50
CPC Classifications
E; E21; E21B; E21B47/00; E21B47/12; E21B47/14; E21B47/18; E21B47/24
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
72 words
An illuminating device for a display frame, which comprises an adjustable bracket disposed for engagement with the frame for support thereby, a lamp adjustable relative to said bracket, a flexible conduit connected to said bracket and connected to said lamp to adjustably support same from said bracket, and a rechargeable battery pack electrically connected to the lamp by conductors extending through said conduit to energize said lamp for illuminating the display frame.
Claim 2
Dependent Claim
72 words
An illuminating device for a display frame, which comprises an adjustable bracket disposed for engagement with the frame for support thereby, a lamp adjustable relative to said bracket, a flexible conduit connected to said bracket and connected to said lamp to adjustably support same from said bracket, and a rechargeable battery pack electrically connected to the lamp by conductors extending through said conduit to energize said lamp for illuminating the display frame.
Claim 3
Dependent Claim
72 words
An illuminating device for a display frame, which comprises an adjustable bracket disposed for engagement with the frame for support thereby, a lamp adjustable relative to said bracket, a flexible conduit connected to said bracket and connected to said lamp to adjustably support same from said bracket, and a rechargeable battery pack electrically connected to the lamp by conductors extending through said conduit to energize said lamp for illuminating the display frame.
Claim 4
Dependent Claim
72 words
An illuminating device for a display frame, which comprises an adjustable bracket disposed for engagement with the frame for support thereby, a lamp adjustable relative to said bracket, a flexible conduit connected to said bracket and connected to said lamp to adjustably support same from said bracket, and a rechargeable battery pack electrically connected to the lamp by conductors extending through said conduit to energize said lamp for illuminating the display frame.
Claim 5
Dependent Claim
22 words
The invention according to claim 1, wherein said magazine comprises a spring-loaded cylindrical chamber, and said ejecting means comprises a reciprocating plunger.
Claim 6
Dependent Claim
26 words
The invention according to claim 2, wherein said plunger moves transversely to said chamber, and said ejecting means also comprises electromagnetic means for actuating said plunger.
Claim 7
Dependent Claim
23 words
The invention according to claim 3, wherein said electromagnetic means comprises an armature carried by said plunger, and a coil surrounding said armature.
Claim 8
Dependent Claim
49 words
The invention according to claim 4, wherein said ejecting means also comprises an oil-filled chamber for holding said plunger and armature, a spring for biasing said plunger into its retracted position, and means for equalizing the pressure between said oil-filled chamber and the drilling fluid surrounding said retaining 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) | 1976-03-05 | 1976-09-04 | 1977-03-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-03-05 | 1980-09-04 | 1981-03-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-03-05 | 1984-09-04 | 1985-03-06 | $7700.00 | Window Closed / Lapsed |