GB247472A - Improvements in or relating to drill bits - Google Patents

Improvements in or relating to drill bits

Info

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
Application number
GB2036625A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
LESTER CLAY BLACK
Original Assignee
LESTER CLAY BLACK
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by LESTER CLAY BLACK filed Critical LESTER CLAY BLACK
Priority to GB2036625A priority Critical patent/GB247472A/en
Publication of GB247472A publication Critical patent/GB247472A/en
Expired legal-status Critical Current

Links

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.
GB2036625A 1925-08-13 1925-08-13 Improvements in or relating to drill bits Expired GB247472A (en)

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)

* Cited by examiner, † Cited by third party
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

Cited By (6)

* Cited by examiner, † Cited by third party
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

Similar Documents

Publication Publication Date Title
US1387733A (en) Well-drilling bit
US1964030A (en) Drill
US2085941A (en) Rock bit
US1902174A (en) Well bore straightening tool
US3469641A (en) Reaming bit assembly
US1734672A (en) Hydraulic rotary-drill bit
US2040263A (en) Detachable blade bit
GB247472A (en) Improvements in or relating to drill bits
US1907154A (en) Core drill
US1660033A (en) Weight regulator for rotary drills
US2249732A (en) Off center reamer
US2239461A (en) Rock boring bit
GB203039A (en) Improvements in percussive rock drilling tools with renewable cutters
US1760354A (en) Rock-drilling mechanism
US1807646A (en) William wright
US1893033A (en) Rock drill
US1172139A (en) Swelled coupling and bit used in diamond-drilling.
US1995389A (en) Disk bit
US1922559A (en) Rock drill
US2613062A (en) Earth drilling bit
US1585540A (en) Detachable rotary bit
GB247473A (en) Improvements in or relating to rotary drill bits
US1843136A (en) Interchangeable blade for drill bits
US3186501A (en) Rock-drilling bits
US2068327A (en) Disk bit