US3739331A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Logging-while-drilling apparatus
Assignee: Mobil Oil AS
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Filing: 1971-07-06
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Granted: 1973-06-12
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Expires: 1991-07-06
Abstract
Abstract An improved logging-while-drilling apparatus comprising a drill collar having a logging-while-drilling tool therein. The tool has a turbinelike, rotary valve which opens and closes at a rate to generate a pressure wave signal in the drilling fluid representative of a measured downhole condition. The tool includes means to adjust the gap between the rotor and stator of the valve to thereby adjust the strength of the signal thus generated. A sleeve of wear resistant material is provided in the collar adjacent the valve to reduce erosion caused by the drilling fluid.
Inventors
- 👤 V Slover
- 👤 J Godbey
- 👤 D Hawk
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 20:13
CPC Classifications
G; G03; G03G; G03G15/00; G03G15/60; G03G15/605; E; E21; E21B; E21B47/00; E21B47/12; E21B47/14; E21B47/18; E21B47/20; E21B47/24
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
152 words
A logging-while-drilling tool comprising: a housing adapted to be positioned in a drill string of an earth drilling apparatus wherein a drilling fluid which is circulated through the drill string will flow around said housing; a rotary valve positioned on said housing so that at least a portion of the drilling fluid flowing through The drill string will flow through said valve whereby a pressure wave signal will be generated in the drilling fluid as said valve opens and closes in response to a downhole condition measured by said tool, said valve comprising: a rotor having openings therethrough mounted on a shaft extending from said housing; a stator on said housing having openings therethrough which when aligned with said openings in said rotor allow flow through said valve and when misaligned effectively block flow through said openings in said rotor; and means for adjusting the gap between said rotor and said stator.
Claim 2
Dependent Claim
152 words
A logging-while-drilling tool comprising: a housing adapted to be positioned in a drill string of an earth drilling apparatus wherein a drilling fluid which is circulated through the drill string will flow around said housing; a rotary valve positioned on said housing so that at least a portion of the drilling fluid flowing through The drill string will flow through said valve whereby a pressure wave signal will be generated in the drilling fluid as said valve opens and closes in response to a downhole condition measured by said tool, said valve comprising: a rotor having openings therethrough mounted on a shaft extending from said housing; a stator on said housing having openings therethrough which when aligned with said openings in said rotor allow flow through said valve and when misaligned effectively block flow through said openings in said rotor; and means for adjusting the gap between said rotor and said stator.
Claim 3
Dependent Claim
39 words
The logging-while-drilling tool of claim 1 wherein said means for adjusting said gap comprises: cooperating means on said shaft and said rotor for affixing said rotor to said shaft at different positions along the longitudinal axis of said shaft.
Claim 4
Dependent Claim
39 words
The logging-while-drilling tool of claim 1 wherein said means for adjusting said gap comprises: cooperating means on said stator and said housing for affixing said stator to said housing at different positions along the longitudinal axis of said housing.
Claim 5
Dependent Claim
19 words
The logging-while-drilling tool of claim 3 wherein said cooperating means comprises: mating threads on said stator and said housing.
Claim 6
Dependent Claim
137 words
A logging-while-drilling apparatus comprising: a conduit adapted to be connected into a drill string of an earth drilling apparatus; a logging-while-drilling tool positioned within said conduit, said tool comprising: a housing; a rotary valve on said housing positioned so that at least a portion of any drilling fluid flowing through the drill string will flow therethrough, said valve comprising: a rotor having openings therethrough mounted on a shaft extending from said housing; a stator on said housing having openings therethrough which when aligned with said openings in said rotor allow flow through said valve and when misaligned effectively block flow through said openings in said rotor; means for adjusting the gap between said rotor and said stator; and wear resistant means on the wall of said conduit at least along that portion which is adjacent said valve.
Claim 7
Dependent Claim
137 words
A logging-while-drilling apparatus comprising: a conduit adapted to be connected into a drill string of an earth drilling apparatus; a logging-while-drilling tool positioned within said conduit, said tool comprising: a housing; a rotary valve on said housing positioned so that at least a portion of any drilling fluid flowing through the drill string will flow therethrough, said valve comprising: a rotor having openings therethrough mounted on a shaft extending from said housing; a stator on said housing having openings therethrough which when aligned with said openings in said rotor allow flow through said valve and when misaligned effectively block flow through said openings in said rotor; means for adjusting the gap between said rotor and said stator; and wear resistant means on the wall of said conduit at least along that portion which is adjacent said valve.
Claim 8
Dependent Claim
28 words
The logging-while-drilling apparatus of claim 5 wherein said wear resistant means comprises: a sleeve of material having a resistance to wear greater than that of the conduit wall.
Claim 9
Dependent Claim
22 words
The logging-while-drilling apparatus of claim 6 wherein: said wear resistant material is comprised of titanium carbide particles in a tool steel matrix.
Claim 10
Dependent Claim
39 words
The logging-while-drilling apparatus of claim 6 wherein said means for adjusting said gap comprises: cooperating means on said shaft and said rotor for affixing said rotor to said shaft at different positions along the longitudinal axis of said shaft.
Claim 11
Dependent Claim
39 words
The logging-while-drilling apparatus of claim 6 wherein said means for adjusting said gap comprises: cooperating means on said stator and said housing for affixing said stator to said housing at different positions along the longitudinal axis of said housing.
Claim 12
Dependent Claim
19 words
The logging-while-drilling apparatus of claim 9 wherein said cooperating means comprises: mating threads on said stator and said housing.
Claim 13
Dependent Claim
24 words
The logging-while-drilling apparatus of claim 10 wherein: those surfaces of said valve which are exposed to drilling fluid are covered with wear resistant material.
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) | 1976-06-11 | 1976-12-11 | 1977-06-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-06-11 | 1980-12-11 | 1981-06-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-06-11 | 1984-12-11 | 1985-06-12 | $7700.00 | Window Closed / Lapsed |