US3554307A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Turbulent flow drill collar
Assignee: W E EEDS
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Filing: 1969-07-03
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Granted: 1971-01-12
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Expires: 1989-07-03
Abstract
Abstract A tubular drill string member having grooves formed in the outer surface thereof extending circumferentially thereabout and longitudinally thereof. The grooves include short sections or lengths of first groove portions which generally parallel the longitudinal centerline of the tubular drill string member or drill collar and short sections or lengths of second groove portions which are inclined generally 15* relative to a plane normal to the longitudinal centerline of the drill collar. The second groove portions interconnect the adjacent ends of adjacent first groove portions and the first and second groove portions of each groove are disposed generally in a helical path extending along and about the corresponding drill collar.
Inventors
- 👤 Nolen A Yount
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 11:11
CPC Classifications
E; E21; E21B; E21B17/00; E21B17/16; E21B17/22
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
123 words
An elongated upstanding tubular member for connection in a drill string, said tubular member having at least one generally helical groove in its outer peripheral surface, said groove including alternating first and second groove portions whose adjacent ends are communicated, said first groove portions generally paralleling the center line of said tubular member and said second groove portions being inclined generally 15* relative to a plane normal to said center line said groove portions being each of a length less than the outside diameter of said tubular member, the lower sidewall portions of the second groove portions being generated by a spirally displaced radius of said tubular member and the upper sidewall portions of said second groove portions being upwardly and outwardly inclined.
Claim 2
Dependent Claim
123 words
An elongated upstanding tubular member for connection in a drill string, said tubular member having at least one generally helical groove in its outer peripheral surface, said groove including alternating first and second groove portions whose adjacent ends are communicated, said first groove portions generally paralleling the center line of said tubular member and said second groove portions being inclined generally 15* relative to a plane normal to said center line said groove portions being each of a length less than the outside diameter of said tubular member, the lower sidewall portions of the second groove portions being generated by a spirally displaced radius of said tubular member and the upper sidewall portions of said second groove portions being upwardly and outwardly inclined.
Claim 3
Dependent Claim
16 words
The combination of claim 1 wherein said first groove portions are generally V-shaped in cross section.
Claim 4
Dependent Claim
16 words
The combination of claim 1 wherein said second groove portions are generally trapezoidal in cross section.
Claim 5
Dependent Claim
40 words
The combination of claim 3 wherein said first groove portions are generally V-shaped in cross section, the sidewalls of said first groove portions being inclined less than 45* relative to radii of said tubular member passing through said groove portions.
Claim 6
Dependent Claim
23 words
The combination of claim 1 wherein the outer surface portions of said tubular member through which said groove portions open are generally cylindrical.
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) | 1974-01-11 | 1974-07-13 | 1975-01-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-01-11 | 1978-07-13 | 1979-01-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-01-11 | 1982-07-13 | 1983-01-12 | $7700.00 | Window Closed / Lapsed |