ZA975507B - Drill tube for forming drill strings. - Google Patents

Drill tube for forming drill strings.

Info

Publication number
ZA975507B
ZA975507B ZA9705507A ZA975507A ZA975507B ZA 975507 B ZA975507 B ZA 975507B ZA 9705507 A ZA9705507 A ZA 9705507A ZA 975507 A ZA975507 A ZA 975507A ZA 975507 B ZA975507 B ZA 975507B
Authority
ZA
South Africa
Prior art keywords
drill
restriction
valve body
seat
drill tube
Prior art date
Application number
ZA9705507A
Inventor
Per-Olof Liljebrand
Rainer Beccu
Urban Olsson
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 ZA975507B publication Critical patent/ZA975507B/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
    • 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)
  • Geology (AREA)
  • Mining & Mineral Resources (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Fluid Mechanics (AREA)
  • Mechanical Engineering (AREA)
  • Environmental & Geological Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Earth Drilling (AREA)
  • Check Valves (AREA)
  • Drilling Tools (AREA)
  • Branch Pipes, Bends, And The Like (AREA)
  • Tubes (AREA)

Abstract

In a first aspect the invention relates to a drill-string-forming drill tube which includes a channel (15) intended for passing flushing liquid, inside of which there is a restriction which forms a seat (14) for a valve body (16) serving as a check valve. Said drill tube comprises, in addition to a partly spherical skittle member (17) for engagement in the seat (14), two or more tangentially separated blocking elements (21). The purpose of said elements is, when flushing liquid is fed from the valve seat towards a second restriction distanced therefrom, to stop the valve body against said second restriction without sealing thereagainst. Therefore, one and the same drill tube may be used for upwardly directed as well as downwardly directed drilling. In a second aspect, the invention relates to the valve body as such.
ZA9705507A 1996-06-24 1997-06-20 Drill tube for forming drill strings. ZA975507B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE9602472A SE506855C2 (en) 1996-06-24 1996-06-24 Drill pipe for forming drill strings and valve body for such drill pipe

Publications (1)

Publication Number Publication Date
ZA975507B true ZA975507B (en) 1998-01-23

Family

ID=20403117

Family Applications (1)

Application Number Title Priority Date Filing Date
ZA9705507A ZA975507B (en) 1996-06-24 1997-06-20 Drill tube for forming drill strings.

Country Status (7)

Country Link
EP (1) EP0907820B1 (en)
AT (1) ATE257214T1 (en)
AU (1) AU712137B2 (en)
DE (1) DE69727056D1 (en)
SE (1) SE506855C2 (en)
WO (1) WO1997049891A1 (en)
ZA (1) ZA975507B (en)

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE922221C (en) * 1952-09-09 1955-01-10 Baker Oil Tools Inc Pipe shoe for the installation of pipe runs in deep boreholes filled with liquid
GB8518218D0 (en) * 1985-07-19 1985-08-29 Drilex Ltd Drop ball sub-assembly
US5174392A (en) * 1991-11-21 1992-12-29 Reinhardt Paul A Mechanically actuated fluid control device for downhole fluid motor
SE503367C2 (en) * 1993-04-27 1996-06-03 Sandvik Ab Drill pipe element for top hammer drilling

Also Published As

Publication number Publication date
AU3282197A (en) 1998-01-14
AU712137B2 (en) 1999-10-28
ATE257214T1 (en) 2004-01-15
SE9602472D0 (en) 1996-06-24
DE69727056D1 (en) 2004-02-05
EP0907820A1 (en) 1999-04-14
WO1997049891A1 (en) 1997-12-31
SE9602472L (en) 1997-12-25
EP0907820B1 (en) 2004-01-02
SE506855C2 (en) 1998-02-16

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