GB207260A - Improvements in and relating to drills - Google Patents
Improvements in and relating to drillsInfo
- Publication number
- GB207260A GB207260A GB22897/22A GB2289722A GB207260A GB 207260 A GB207260 A GB 207260A GB 22897/22 A GB22897/22 A GB 22897/22A GB 2289722 A GB2289722 A GB 2289722A GB 207260 A GB207260 A GB 207260A
- Authority
- GB
- United Kingdom
- Prior art keywords
- shank
- collar
- cutters
- cutter
- drill
- 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
- 230000015572 biosynthetic process Effects 0.000 abstract 1
- 238000005553 drilling Methods 0.000 abstract 1
- 239000010802 sludge Substances 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
- E21B17/00—Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Cables; Casings; Tubings
- E21B17/02—Couplings; joints
- E21B17/04—Couplings; joints between rod or the like and bit or between rod and rod or the like
- E21B17/042—Threaded
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)
- Drilling Tools (AREA)
- Processing Of Stones Or Stones Resemblance Materials (AREA)
Abstract
207,260. Withers, J. S., (McCormick Drilling Tool Co.). Aug. 22, 1922. Percussive drills. - In a drill of the kind in which cutters are secured in radial slots 2 at the end of the drill shank 1 by a collar 9 having a threaded engagement with the shank, the shanks 6 of the cutter 5 are formed with mitered intersecting parts 7 to make them self-centring, and the collar 9 is bevelled on the inner side to accommodate cutters of different sizes. The upper end of each cutter shank 6 is formed with an enlargement 6<1> adapted to engage shoulders at the upper end of the corresponding slot 2. The collar 9 is locked against rotation by a wedge 10 engaging a slot 4 in the shank 1. The cutting edges 8 of the cutters 5 are inclined as shown in Fig. 2 so that the two bevelled faces of each cutter head are of unequal size, this formation serving to impart a rotative effect as the tool drops through the sludge.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB22897/22A GB207260A (en) | 1922-08-22 | 1922-08-22 | Improvements in and relating to drills |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB22897/22A GB207260A (en) | 1922-08-22 | 1922-08-22 | Improvements in and relating to drills |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB207260A true GB207260A (en) | 1923-11-22 |
Family
ID=10186814
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB22897/22A Expired GB207260A (en) | 1922-08-22 | 1922-08-22 | Improvements in and relating to drills |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB207260A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2649284A (en) * | 1949-02-12 | 1953-08-18 | Letts Orlando Arthur | Inserted tooth rock drill |
| US4142283A (en) * | 1977-05-23 | 1979-03-06 | Walker Donald R | Torsion spring wrench |
-
1922
- 1922-08-22 GB GB22897/22A patent/GB207260A/en not_active Expired
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2649284A (en) * | 1949-02-12 | 1953-08-18 | Letts Orlando Arthur | Inserted tooth rock drill |
| US4142283A (en) * | 1977-05-23 | 1979-03-06 | Walker Donald R | Torsion spring wrench |
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