SE9004027D0 - BORRSTRAENGSELEMENT - Google Patents

BORRSTRAENGSELEMENT

Info

Publication number
SE9004027D0
SE9004027D0 SE9004027A SE9004027A SE9004027D0 SE 9004027 D0 SE9004027 D0 SE 9004027D0 SE 9004027 A SE9004027 A SE 9004027A SE 9004027 A SE9004027 A SE 9004027A SE 9004027 D0 SE9004027 D0 SE 9004027D0
Authority
SE
Sweden
Prior art keywords
bar
radial projections
tubular unit
drilling fluid
dia
Prior art date
Application number
SE9004027A
Other languages
Swedish (sv)
Other versions
SE9004027L (en
Inventor
K Larsson
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 SE9004027A priority Critical patent/SE9004027L/en
Publication of SE9004027D0 publication Critical patent/SE9004027D0/en
Publication of SE9004027L publication Critical patent/SE9004027L/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
    • 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
    • E21B21/00—Methods or apparatus for flushing boreholes, e.g. by use of exhaust air from motor
    • E21B21/10—Valve arrangements in drilling-fluid circulation systems

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 rod included in each drill string component for transmission of striker energy to the drill crown at the strings 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 diameter reductions which are displaced towards the ends of it. - The bar had radial projections which are displaced towards its end, whereby the internal dia. reductions and the radial projections are dimensioned to prevent the bar falling out of the tubular unit. The radial projections take the form of an all-round collar, and a transition part is arranged between the collar and the nearest free end of the bar. The corresp. dia, reduction are in the form of a seat hwich with the transition part is so formed that they and the transitioon part produce a check valve for drilling fluid when they are in contact with each other.
SE9004027A 1990-12-17 1990-12-17 Drill string component with threaded union - is coupled to other such components for top hammer drilling, each component having rod for striker energy transmission SE9004027L (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
SE9004027A SE9004027L (en) 1990-12-17 1990-12-17 Drill string component with threaded union - is coupled to other such components for top hammer drilling, each component having rod for striker energy transmission

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE9004027A SE9004027L (en) 1990-12-17 1990-12-17 Drill string component with threaded union - is coupled to other such components for top hammer drilling, each component having rod for striker energy transmission

Publications (2)

Publication Number Publication Date
SE9004027D0 true SE9004027D0 (en) 1990-12-17
SE9004027L SE9004027L (en) 1992-06-18

Family

ID=20381217

Family Applications (1)

Application Number Title Priority Date Filing Date
SE9004027A SE9004027L (en) 1990-12-17 1990-12-17 Drill string component with threaded union - is coupled to other such components for top hammer drilling, each component having rod for striker energy transmission

Country Status (1)

Country Link
SE (1) SE9004027L (en)

Also Published As

Publication number Publication date
SE9004027L (en) 1992-06-18

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