GB247472A - Improvements in or relating to drill bits - Google Patents
Improvements in or relating to drill bitsInfo
- Publication number
- GB247472A GB247472A GB2036625A GB2036625A GB247472A GB 247472 A GB247472 A GB 247472A GB 2036625 A GB2036625 A GB 2036625A GB 2036625 A GB2036625 A GB 2036625A GB 247472 A GB247472 A GB 247472A
- Authority
- GB
- United Kingdom
- Prior art keywords
- blade
- head
- shank
- cutting edges
- bit
- 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
- 238000005553 drilling Methods 0.000 abstract 2
- 229910000851 Alloy steel Inorganic materials 0.000 abstract 1
- CWYNVVGOOAEACU-UHFFFAOYSA-N Fe2+ Chemical compound [Fe+2] CWYNVVGOOAEACU-UHFFFAOYSA-N 0.000 abstract 1
- 229910000617 Mangalloy Inorganic materials 0.000 abstract 1
- 229910000831 Steel Inorganic materials 0.000 abstract 1
- 229910000754 Wrought iron Inorganic materials 0.000 abstract 1
- 230000001154 acute effect Effects 0.000 abstract 1
- 238000006073 displacement reaction Methods 0.000 abstract 1
- 239000003129 oil well Substances 0.000 abstract 1
- 239000010959 steel Substances 0.000 abstract 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 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
- E21B10/00—Drill bits
- E21B10/44—Bits with helical conveying portion, e.g. screw type bits; Augers with leading portion or with detachable parts
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
247,472. Black, L. C. Aug. 13, 1925. Borehole apparatus.-A rotary drill bit for use in drilling oil wells comprises a helicoidal blade 3 terminating in two diametrical cutting edges 21 and formed integral with a head 2. The blade is formed of a tough steel alloy, such as manganese steel, incapable of being machined, and is attached to a shank 6 of steel or wrought iron by means of a wedge-shaped projection 8 on the latter engaging a recess 4 in the head 2. A sleeve 9 screwed on the shank abuts against shoulders 10 on the head to tighten the wedge and engages a circular projection a to prevent lateral displacement, the thread being left-handed for a right hand drill. The shank is also screw-threaded at 11 for attachment to a drilling tube and has an axial hole 12 registering with a hole 13 in the bit for the supply of water or mud to the cutting edges, to which it is led directly by a pipe screwing in the lower end of the hole 12 and passing through a hollow boss 14 in the bit. The inclination of the blade is such that acute cutting edges 21 are maintained by axial wear of the blade and the helix is of uniform diameter so that the edges have a reaming action.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB2036625A GB247472A (en) | 1925-08-13 | 1925-08-13 | Improvements in or relating to drill bits |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB2036625A GB247472A (en) | 1925-08-13 | 1925-08-13 | Improvements in or relating to drill bits |
Publications (1)
Publication Number | Publication Date |
---|---|
GB247472A true GB247472A (en) | 1926-02-18 |
Family
ID=10144737
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB2036625A Expired GB247472A (en) | 1925-08-13 | 1925-08-13 | Improvements in or relating to drill bits |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB247472A (en) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2857140A (en) * | 1956-08-13 | 1958-10-21 | Sam N Johnson | Earth bit |
AU2008205690B2 (en) * | 2008-08-15 | 2011-06-02 | Sandvik Intellectual Property Ab | Core drill bit |
CN114352206A (en) * | 2021-11-25 | 2022-04-15 | 傅丽兵 | Drill bit for expanding diameter |
CN116690320A (en) * | 2023-08-01 | 2023-09-05 | 河北宝鑫轴承制造有限责任公司 | High-precision bearing roller grinding device |
-
1925
- 1925-08-13 GB GB2036625A patent/GB247472A/en not_active Expired
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2857140A (en) * | 1956-08-13 | 1958-10-21 | Sam N Johnson | Earth bit |
AU2008205690B2 (en) * | 2008-08-15 | 2011-06-02 | Sandvik Intellectual Property Ab | Core drill bit |
CN114352206A (en) * | 2021-11-25 | 2022-04-15 | 傅丽兵 | Drill bit for expanding diameter |
CN114352206B (en) * | 2021-11-25 | 2024-01-12 | 湖北兴龙工具有限公司 | Drill bit for expanding |
CN116690320A (en) * | 2023-08-01 | 2023-09-05 | 河北宝鑫轴承制造有限责任公司 | High-precision bearing roller grinding device |
CN116690320B (en) * | 2023-08-01 | 2023-10-24 | 河北宝鑫轴承制造有限责任公司 | High-precision bearing roller grinding device |
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