GB741833A - Improvements in or relating to rock drills - Google Patents
Improvements in or relating to rock drillsInfo
- Publication number
- GB741833A GB741833A GB368353A GB368353A GB741833A GB 741833 A GB741833 A GB 741833A GB 368353 A GB368353 A GB 368353A GB 368353 A GB368353 A GB 368353A GB 741833 A GB741833 A GB 741833A
- Authority
- GB
- United Kingdom
- Prior art keywords
- length
- vibration
- metal
- harmonic
- longitudinal
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B17/00—Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Cables; Casings; Tubings
Abstract
741,833. Earth-boring apparatus. CARRUTHERS, C. J. D. May 10, 1954 [Feb. 10, 1953], No. 3683/53. Drawings to Specification. Class 85. Means are provided in a drill string to damp out the longitudinal and torsional vibrations set up in a drill string by the periodic impacts on the bottom of a borehole by the teeth of the roller cones of the earth - boring kit. The means comprise fundamentally a length of metal attached to the bit and slidably mounted on the lower end of the interconnected drill rods of the drill string, or attached either at the lower end of said drill rods, or at a distance from said lower equal to half the length or a multiple of said length of a fundamental harmonic of the longitudinal or torsional harmonies. The metal length extends for a distance equal to one quarter of the length of the fundamental harmonic of the longitudinal or torsional vibration, or for a fraction of this length corresponding to an order of another harmonic of said vibration. The unattached end of the metal length is free to move axially or circumferentially. One or more lengths of metal of a length determined by the other harmonies of the vibration may also be used and these shorter lengths may have splined extensions of such a length as to bring the combined effective length to a length equal to a quarter of the length of an harmonic of the next higher order of the other form of vibration than that for which the short length was designed to deal with.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB368353A GB741833A (en) | 1953-02-10 | 1953-02-10 | Improvements in or relating to rock drills |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB368353A GB741833A (en) | 1953-02-10 | 1953-02-10 | Improvements in or relating to rock drills |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB741833A true GB741833A (en) | 1955-12-14 |
Family
ID=9762955
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB368353A Expired GB741833A (en) | 1953-02-10 | 1953-02-10 | Improvements in or relating to rock drills |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB741833A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2989130A (en) * | 1958-01-23 | 1961-06-20 | Bodine Ag | Isolator for sonic earth boring drill |
| US3406524A (en) * | 1967-05-03 | 1968-10-22 | Pan American Petroleum Corp | Fluid-sonic pile driving |
-
1953
- 1953-02-10 GB GB368353A patent/GB741833A/en not_active Expired
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2989130A (en) * | 1958-01-23 | 1961-06-20 | Bodine Ag | Isolator for sonic earth boring drill |
| US3406524A (en) * | 1967-05-03 | 1968-10-22 | Pan American Petroleum Corp | Fluid-sonic pile driving |
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