GB155817A - An improved under-reaming percussion bit for drilling or boring operations - Google Patents
An improved under-reaming percussion bit for drilling or boring operationsInfo
- Publication number
- GB155817A GB155817A GB32615/20A GB3261520A GB155817A GB 155817 A GB155817 A GB 155817A GB 32615/20 A GB32615/20 A GB 32615/20A GB 3261520 A GB3261520 A GB 3261520A GB 155817 A GB155817 A GB 155817A
- Authority
- GB
- United Kingdom
- Prior art keywords
- edge
- bit
- hole
- reaming
- drilling
- 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
- 238000009527 percussion Methods 0.000 title abstract 2
- 238000005553 drilling Methods 0.000 title 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
- E21B10/00—Drill bits
- E21B10/64—Drill bits characterised by the whole or part thereof being insertable into or removable from the borehole without withdrawing the drilling pipe
- E21B10/66—Drill bits characterised by the whole or part thereof being insertable into or removable from the borehole without withdrawing the drilling pipe the cutting element movable through the drilling pipe and laterally shiftable
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)
- Percussive Tools And Related Accessories (AREA)
Abstract
155,817. Herman, J. H. Dec. 20, 1919, [Convention date]. Bore-hole apparatus. - A percussion bit for deep well boring has two cutting edges c, d, the edge d being broader than and arranged above the edge c and a spring-pressed trigger h engages a side of the bore-hole to press the edge d against the opposite side. On reciprocating the bit, the edge c cuts out a central hole and the edge d enlarges the hole for the reception of the well casing. On raising the bit, the trigger is forced into its recess g on engaging the well casing, through which the bit can then pass. The trig. ger may have a re movable wearing face h<1>.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AU155817X | 1919-12-20 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB155817A true GB155817A (en) | 1922-02-20 |
Family
ID=3705633
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB32615/20A Expired GB155817A (en) | 1919-12-20 | 1920-11-18 | An improved under-reaming percussion bit for drilling or boring operations |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB155817A (en) |
-
1920
- 1920-11-18 GB GB32615/20A patent/GB155817A/en not_active Expired
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