GB755792A - Improvements in percussive drill crowns - Google Patents

Improvements in percussive drill crowns

Info

Publication number
GB755792A
GB755792A GB2135354A GB2135354A GB755792A GB 755792 A GB755792 A GB 755792A GB 2135354 A GB2135354 A GB 2135354A GB 2135354 A GB2135354 A GB 2135354A GB 755792 A GB755792 A GB 755792A
Authority
GB
United Kingdom
Prior art keywords
insert
degrees
plane
drill steel
percussive
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
GB2135354A
Inventor
Sven Rudquist
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.)
Hellefors Bruks AB
Original Assignee
Hellefors Bruks AB
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 Hellefors Bruks AB filed Critical Hellefors Bruks AB
Priority to GB2135354A priority Critical patent/GB755792A/en
Publication of GB755792A publication Critical patent/GB755792A/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
    • E21B10/46—Drill bits characterised by wear resisting parts, e.g. diamond inserts
    • E21B10/58—Chisel-type inserts

Landscapes

  • Engineering & Computer Science (AREA)
  • Geology (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Mining & Mineral Resources (AREA)
  • Physics & Mathematics (AREA)
  • Environmental & Geological Engineering (AREA)
  • Fluid Mechanics (AREA)
  • Mechanical Engineering (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Percussive Tools And Related Accessories (AREA)
  • Drilling Tools (AREA)
  • Processing Of Stones Or Stones Resemblance Materials (AREA)

Abstract

755,792. Percussive drills. HELLEFORS BRUKS AKTIEBOLAG. July 22, 1954 No. 21353/54. Class 124 A percussive drill steel has an insert with the cutting edge situated at one side of the longtitudinal central plane at a distance from that plane which is 5-30 per cent of the width of the insert. As shown, a drill steel 1 has an insert 3 in a groove formed centrally and transversally across its end, the cutting edge 9 being situated at a distance a to one side of the longitudinal central plane x-x. The angles b and c made by the faces of the insert with a line perpendicular to the plane x-x may differ by 2-6 degrees, e.g. the angle b may be 36 degrees and the angle c 40 degrees. The drill steel may be hollow and the head may have recesses 6 for the removal of debris.
GB2135354A 1954-07-22 1954-07-22 Improvements in percussive drill crowns Expired GB755792A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB2135354A GB755792A (en) 1954-07-22 1954-07-22 Improvements in percussive drill crowns

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2135354A GB755792A (en) 1954-07-22 1954-07-22 Improvements in percussive drill crowns

Publications (1)

Publication Number Publication Date
GB755792A true GB755792A (en) 1956-08-29

Family

ID=10161465

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2135354A Expired GB755792A (en) 1954-07-22 1954-07-22 Improvements in percussive drill crowns

Country Status (1)

Country Link
GB (1) GB755792A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107639245A (en) * 2017-10-30 2018-01-30 舟山飞达工具有限公司 A kind of multifunctional alloy blade

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107639245A (en) * 2017-10-30 2018-01-30 舟山飞达工具有限公司 A kind of multifunctional alloy blade

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