US3822589A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sensing device to measure the speed of rotation of drilling turbines
Assignee: Societe Nationale des Petroles dAquitaine SA
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Filing: 1972-05-30
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Granted: 1974-07-09
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Expires: 1992-05-30
Abstract
Abstract This invention concerns a sensing device to measure the speed of rotation of a drilling turbine, used with a device to transmit signals from the bottom of the well to the surface. This sensing device consists of a detector working with a mobile magnetic flux transducer, a tube containing the leads, and a male plug for connection with the transmitting device, with a flange at the top end of the tube which rests on the conical base of the turbine neck. The device, because of its design, offers the advantages of a removable unit, which will fit any type of turbine.
Inventors
- 👤 Peuvedic J Le
- 👤 J Tinchon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 17:44
CPC Classifications
E; E21; E21B; E21B41/00; E21B41/0085; E21B4/00; E21B4/02; E21B44/00; E21B44/005; G; G01; G01P; G01P3/00; G01P3/42; G01P3/44; G01P3/48; G01P3/481; G01P3/487
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
210 words
In a drilling assembly comprising a turbine, a turbine casing within which said turbine is rotatably mounted, said casing having an internally threaded frusto-conical upper end, a drill collar carrying electrical connector means and having a matingly frusto-conical externally threaded lower end adapted to be screwed into the upper end of said casing, and a sensing device for measuring the speed of rotation of said turbine in said casing, the improved sensing device which comprises a supporting member shaped and dimensioned to be seated in the frusto-conical upper end of said turbine casing and gripped between said casing and the lower end of said drill collar, a tube suspended from the central part of said supporting member to lie within said turbine casing, spacer means on said tube beneath said supporting member for spacing said tube from said turbine casing, sensor means at the bottom of said tube which responds to changes in magnetic field by providing an electric signal, conductor means in said tube connected to said sensor means for carrying said signal to the upper end of said tube, and electrical connector means at the upper end of said tube connected to said conductor means and adapted to interfit with the connector means carried by said drill collar.
Claim 2
Dependent Claim
210 words
In a drilling assembly comprising a turbine, a turbine casing within which said turbine is rotatably mounted, said casing having an internally threaded frusto-conical upper end, a drill collar carrying electrical connector means and having a matingly frusto-conical externally threaded lower end adapted to be screwed into the upper end of said casing, and a sensing device for measuring the speed of rotation of said turbine in said casing, the improved sensing device which comprises a supporting member shaped and dimensioned to be seated in the frusto-conical upper end of said turbine casing and gripped between said casing and the lower end of said drill collar, a tube suspended from the central part of said supporting member to lie within said turbine casing, spacer means on said tube beneath said supporting member for spacing said tube from said turbine casing, sensor means at the bottom of said tube which responds to changes in magnetic field by providing an electric signal, conductor means in said tube connected to said sensor means for carrying said signal to the upper end of said tube, and electrical connector means at the upper end of said tube connected to said conductor means and adapted to interfit with the connector means carried by said drill collar.
Claim 3
Dependent Claim
27 words
A sensing device as claimed in claim 1 in which said supporting means is perforated to permit the passage therethrough of a fluid to drive said turbine.
Claim 4
Dependent Claim
25 words
A sensing device as claimed in claim 1 in which said sensor means is a flexible blade relay, the blade of which is magnetically actuated.
Claim 5
Dependent Claim
21 words
A sensing device as claimed in claim 1 in which said sensor means is a solenoid wound on a magnetized bar.
References Cited (Backward Citations)
US2985829A
Cited
US3036460A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-07-08 | 1978-01-07 | 1978-07-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-07-08 | 1982-01-07 | 1982-07-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-07-08 | 1986-01-07 | 1986-07-09 | $7700.00 | Window Closed / Lapsed |