GB781516A - Improvements in earth penetrating apparatus - Google Patents
Improvements in earth penetrating apparatusInfo
- Publication number
- GB781516A GB781516A GB1119955A GB1119955A GB781516A GB 781516 A GB781516 A GB 781516A GB 1119955 A GB1119955 A GB 1119955A GB 1119955 A GB1119955 A GB 1119955A GB 781516 A GB781516 A GB 781516A
- Authority
- GB
- United Kingdom
- Prior art keywords
- mass
- reciprocable
- backing
- oscillate
- rod
- 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
- 230000000149 penetrating effect Effects 0.000 title 1
- 238000005553 drilling Methods 0.000 abstract 1
- 238000003475 lamination Methods 0.000 abstract 1
- 230000004048 modification Effects 0.000 abstract 1
- 238000012986 modification Methods 0.000 abstract 1
- 239000011435 rock Substances 0.000 abstract 1
- 238000004804 winding Methods 0.000 abstract 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B4/00—Drives for drilling, used in the borehole
- E21B4/06—Down-hole impacting means, e.g. hammers
- E21B4/12—Electrically operated hammers
Landscapes
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Earth Drilling (AREA)
Abstract
781,516. Boring earth and rock. CABOT. Inc., G. L. April 19, 1955, No. 11199/55. Addition to 749,148. Class 85 A percussive drilling tool has a drill bit carried by a reciprocable mass which is connected to a backing mass by a rigid connecting means having a high modulus of elasticity, the connecting means being rapidly stretched by electromagnetic means and then contracting due to its elasticity so causing the drill bit to oscillate at a high frequency. A backing mass comprising a cable socket 16, Fig. 1, a mass 10 and a tubular member 18 is connected by a rod 14 to a reciprocable mass 12 which is slidable in the tube 18 and carries a bit 20. The electromagnetic means comprise an armature 24 connected to the rod 14 and an electromagnet having a ring like core composed of L-shaped laminations 26, with windings 28, connected to the tube 18 and energized by an alternating current so as to oscillate the system at its resonant frequency. The backing mass 10, 16, 18 may be ten times the reciprocable mass 12 so that the backing mass will remain comparatively stationary. In a modification, Fig. 3, the backing mass 42 and' the reciprocable mass 44 are of equal mass and are connected by a rod 46 which is attached at its nodular point by a bracket 48 to a tubular member 40 in which bothmasses can slide. The system is vibrated as before, and the two masses 42, 44 oscillate with equal amplitudes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1119955A GB781516A (en) | 1955-04-19 | 1955-04-19 | Improvements in earth penetrating apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1119955A GB781516A (en) | 1955-04-19 | 1955-04-19 | Improvements in earth penetrating apparatus |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB781516A true GB781516A (en) | 1957-08-21 |
Family
ID=9981831
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB1119955A Expired GB781516A (en) | 1955-04-19 | 1955-04-19 | Improvements in earth penetrating apparatus |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB781516A (en) |
-
1955
- 1955-04-19 GB GB1119955A patent/GB781516A/en not_active Expired
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