SE9004028L - Drill string component for top hammer drilling - has at least one bar for striker energy transmission drill crown with tube around bar for rotation transmission to crown - Google Patents

Drill string component for top hammer drilling - has at least one bar for striker energy transmission drill crown with tube around bar for rotation transmission to crown

Info

Publication number
SE9004028L
SE9004028L SE9004028A SE9004028A SE9004028L SE 9004028 L SE9004028 L SE 9004028L SE 9004028 A SE9004028 A SE 9004028A SE 9004028 A SE9004028 A SE 9004028A SE 9004028 L SE9004028 L SE 9004028L
Authority
SE
Sweden
Prior art keywords
bar
crown
drill
transmission
reductions
Prior art date
Application number
SE9004028A
Other languages
Swedish (sv)
Other versions
SE9004028D0 (en
Inventor
P-O Liljebrand
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
Priority to SE9004028A priority Critical patent/SE9004028L/en
Publication of SE9004028D0 publication Critical patent/SE9004028D0/en
Publication of SE9004028L publication Critical patent/SE9004028L/en

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
    • E21B17/00—Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Cables; Casings; Tubings

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)
  • Percussive Tools And Related Accessories (AREA)

Abstract

The rod included in each drill string component for transmission of striker energy to the drill crown at the string lower end is surrounded by a tubular unit for transmission of rotation to the drill crown. The tubular unit produces a space for drilling fluid between it and the bar, and has two internal dia. reductions which are displaced towards its ends. The bar has radial projections which are displaced towards its ends, whereby the internal dia. reductions and the radial projections are dimensioned to prevent the bar falling out of the tubular unit. The tubular unit is formed in one piece, and at least one of the dia. reductions is arranged on a separate element, and components are provided for axially fix the separate element in relation to the tubular component. The internal dia. reductions are in the form of a seat.
SE9004028A 1990-12-17 1990-12-17 Drill string component for top hammer drilling - has at least one bar for striker energy transmission drill crown with tube around bar for rotation transmission to crown SE9004028L (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
SE9004028A SE9004028L (en) 1990-12-17 1990-12-17 Drill string component for top hammer drilling - has at least one bar for striker energy transmission drill crown with tube around bar for rotation transmission to crown

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE9004028A SE9004028L (en) 1990-12-17 1990-12-17 Drill string component for top hammer drilling - has at least one bar for striker energy transmission drill crown with tube around bar for rotation transmission to crown

Publications (2)

Publication Number Publication Date
SE9004028D0 SE9004028D0 (en) 1990-12-17
SE9004028L true SE9004028L (en) 1992-06-18

Family

ID=20381218

Family Applications (1)

Application Number Title Priority Date Filing Date
SE9004028A SE9004028L (en) 1990-12-17 1990-12-17 Drill string component for top hammer drilling - has at least one bar for striker energy transmission drill crown with tube around bar for rotation transmission to crown

Country Status (1)

Country Link
SE (1) SE9004028L (en)

Also Published As

Publication number Publication date
SE9004028D0 (en) 1990-12-17

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Legal Events

Date Code Title Description
NAV Patent application has lapsed

Ref document number: 9004028-8

Effective date: 19940701