FR2346110A1 - Hammer bit for percussive drilling - is positioned on taper mandrel by screwed thread and cone with thread disengaged when tool is in use (NO 31.10.77) - Google Patents

Hammer bit for percussive drilling - is positioned on taper mandrel by screwed thread and cone with thread disengaged when tool is in use (NO 31.10.77)

Info

Publication number
FR2346110A1
FR2346110A1 FR7709699A FR7709699A FR2346110A1 FR 2346110 A1 FR2346110 A1 FR 2346110A1 FR 7709699 A FR7709699 A FR 7709699A FR 7709699 A FR7709699 A FR 7709699A FR 2346110 A1 FR2346110 A1 FR 2346110A1
Authority
FR
France
Prior art keywords
thread
cone
tool
disengaged
screwed
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.)
Granted
Application number
FR7709699A
Other languages
French (fr)
Other versions
FR2346110B1 (en
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.)
Sandvik AB
Original Assignee
Sandvik 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 Sandvik AB filed Critical Sandvik AB
Publication of FR2346110A1 publication Critical patent/FR2346110A1/en
Application granted granted Critical
Publication of FR2346110B1 publication Critical patent/FR2346110B1/fr
Granted legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25D—PERCUSSIVE TOOLS
    • B25D17/00—Details of, or accessories for, portable power-driven percussive tools
    • B25D17/02—Percussive tool bits
    • 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
    • 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
    • E21B17/0426—Threaded with a threaded cylindrical portion, e.g. for percussion rods

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

The hammer bit is used for percussive drilling and has a cylindrical body with several cemented carbide cutting tips (13). It is held on a taper mandrel by an initial threaded portion and an internal cone (20) matching the taper. Holes through both form cutting fluid passages (17, 18). The cone in the drill body has a straight extension, having two screw threads (21) of rounded profile dividing it in half (22, 23). The mandrel has a corresponding extension, with similar threads at the end. When screwed into the bit, these threads pass through those in the drill bit, being disengaged when the tool is in use.
FR7709699A 1976-04-02 1977-03-31 Hammer bit for percussive drilling - is positioned on taper mandrel by screwed thread and cone with thread disengaged when tool is in use (NO 31.10.77) Granted FR2346110A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CA249,433A CA1038856A (en) 1976-04-02 1976-04-02 Percussion drill bit

Publications (2)

Publication Number Publication Date
FR2346110A1 true FR2346110A1 (en) 1977-10-28
FR2346110B1 FR2346110B1 (en) 1981-11-20

Family

ID=4105622

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7709699A Granted FR2346110A1 (en) 1976-04-02 1977-03-31 Hammer bit for percussive drilling - is positioned on taper mandrel by screwed thread and cone with thread disengaged when tool is in use (NO 31.10.77)

Country Status (4)

Country Link
CA (1) CA1038856A (en)
FI (1) FI770994A (en)
FR (1) FR2346110A1 (en)
NO (1) NO771177L (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0238957A2 (en) * 1986-03-24 1987-09-30 ZEPF, Hans-Rudolf Tool for a hydraulic hammer or the like

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102635315B (en) * 2012-04-27 2014-05-07 中国地质大学（武汉） Joint with hole-repairing drill bit

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0238957A2 (en) * 1986-03-24 1987-09-30 ZEPF, Hans-Rudolf Tool for a hydraulic hammer or the like
EP0238957A3 (en) * 1986-03-24 1990-04-18 ZEPF, Hans-Rudolf Tool for a hydraulic hammer or the like

Also Published As

Publication number Publication date
FR2346110B1 (en) 1981-11-20
FI770994A (en) 1977-10-03
CA1038856A (en) 1978-09-19
NO771177L (en) 1977-10-04

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Legal Events

Date Code Title Description
ST Notification of lapse