GB610917A - Improvements in rotary earth boring bits - Google Patents
Improvements in rotary earth boring bitsInfo
- Publication number
- GB610917A GB610917A GB1090746A GB1090746A GB610917A GB 610917 A GB610917 A GB 610917A GB 1090746 A GB1090746 A GB 1090746A GB 1090746 A GB1090746 A GB 1090746A GB 610917 A GB610917 A GB 610917A
- Authority
- GB
- United Kingdom
- Prior art keywords
- shafts
- cutter cone
- stub
- cone
- axle
- 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
- E21B10/00—Drill bits
- E21B10/08—Roller bits
- E21B10/20—Roller bits characterised by detachable or adjustable parts, e.g. legs or axles
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
610,917. Rock drills. LANCHESTER, G. H., and STERLING ENGINEERING CO., Ltd. April 9, 1946, No. 10907. [Class 85] A drill head consists of an internally cored housing 1 which is angularly bored as at 6 to receive three stub shafts which are held from downward displacement by a bolt 8, the shank of which engages grooves in two of the shafts and is threaded into a screwed aperture 11 in the third. The shafts are also rigidly positioned at the lower ends by squared shoulders 12 which engage with corresponding recesses 13 in the housing 1. The lower ends of the shafts are formed with curved backshields 14 and angled extensions 15, each of the latter carrying an angled stub axle 16. On the stub axles are formed races 19 and 21 for ball and roller bearings which support the hollow cutter cone 23 of substantially uniform thickness. In assembly, the cutter cone is heated and on expanding is pressed on to the stub axle, the expansion just allowing sufficient clearance for the cutter cone to pass over the balls 26. The bearings are sealed off by a ring 18. On cooling, the cutter cone is free to rotate but is firmly locked on the axle, a spigot 22 locating the cone. Drilling mud is fed from the internal bore through a channel 7 on each shaft to passages 31 and thence to the cutters. Any number of the tungsten carbide teethed cutters may be used.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1090746A GB610917A (en) | 1946-04-09 | 1946-04-09 | Improvements in rotary earth boring bits |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1090746A GB610917A (en) | 1946-04-09 | 1946-04-09 | Improvements in rotary earth boring bits |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB610917A true GB610917A (en) | 1948-10-22 |
Family
ID=9976481
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB1090746A Expired GB610917A (en) | 1946-04-09 | 1946-04-09 | Improvements in rotary earth boring bits |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB610917A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2316432A1 (en) * | 1975-06-20 | 1977-01-28 | Skf Ind Trading & Dev | ROLLER TREPAN FOR DRILLING IN EARTH CRUST |
-
1946
- 1946-04-09 GB GB1090746A patent/GB610917A/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2316432A1 (en) * | 1975-06-20 | 1977-01-28 | Skf Ind Trading & Dev | ROLLER TREPAN FOR DRILLING IN EARTH CRUST |
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