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AT17648B - Pipe, especially drill pipe. - Google Patents

Pipe, especially drill pipe.

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Publication number
AT17648B
AT17648B AT17648DA AT17648B AT 17648 B AT17648 B AT 17648B AT 17648D A AT17648D A AT 17648DA AT 17648 B AT17648 B AT 17648B
Authority
AT
Austria
Prior art keywords
pipe
especially drill
hardened
thread
drill pipe
Prior art date
Application number
Other languages
German (de)
Inventor
Max Mlitz
Original Assignee
Max Mlitz
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 Max Mlitz filed Critical Max Mlitz
Application granted granted Critical
Publication of AT17648B publication Critical patent/AT17648B/en

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  • Drilling Tools (AREA)

Description

  

   <Desc/Clms Page number 1> 
 



   Österreichische PATENTSCHRIFT   Nu 17648.   



  MAX MLITZ IN ODERBERG   (SCIJLESIEN).   



   Rohr, insbesonders Bohrrohr. 



   Vorliegende Erfindung betrifft ein Rohr, u. zw. hauptsächlich ein Bohrrohr, bei welchem die durch das Anschneiden der Gewinde   hervorgebrachte Schwächung desselben   durch Erhöhung der Zerreissfestigkeit des Materiales an diesen Stellen ausgeglichen wird. 



  Dies wird nach vorliegender Erfindung dadurch erreicht, dass das Rohrende gehärtet ist,   u. zw.   derart, dass das mit Aussengewinden versehene Ende innen und das mit Innengewinden versehene aussen gehärtet ist. Derartige Rohre zeigen trotz der Verschwächung durch das Gewinde der ganzen Länge nach eine annähernd gleiche   Festigkeit, ohne dal3   
 EMI1.1 
 sonders für Bohrrohre von grosser Wichtigkeit ist. 

**WARNUNG** Ende DESC Feld kannt Anfang CLMS uberlappen**.



   <Desc / Clms Page number 1>
 



   Austrian PATENT NUMBER 17648.



  MAX MLITZ IN ORBERG (SCIJLESIA).



   Pipe, especially drill pipe.



   The present invention relates to a pipe, u. between mainly a drill pipe in which the weakening of the thread caused by cutting the thread is compensated for by increasing the tensile strength of the material at these points.



  This is achieved according to the present invention in that the pipe end is hardened, u. zw. Such that the end provided with external threads is hardened on the inside and the end provided with internal threads is hardened on the outside. In spite of the weakening by the thread, such pipes show approximately the same strength along their entire length, without dal3
 EMI1.1
 especially for drill pipes is of great importance.

** WARNING ** End of DESC field may overlap beginning of CLMS **.

Claims (1)

PATENT-ANSPRUCH : Rohr, insbesonders Bohrrohr, dadurch gekennzeichnet, dass das mit Aussengewinden versehene Rohrende innen, das mit Innengewinden versehene aussen gehärtet ist, so dass das Rohr trotz der Schwächung durch das Gewinde seiner ganzen Länge nach eine annähernd gleiche Festigkeit aufweist. **WARNUNG** Ende CLMS Feld Kannt Anfang DESC uberlappen**. PATENT CLAIM: Pipe, in particular drill pipe, characterized in that the pipe end provided with external threads is hardened on the inside, the one provided with internal threads on the outside so that the pipe has approximately the same strength over its entire length despite the weakening by the thread. ** WARNING ** End of CLMS field may overlap beginning of DESC **.
AT17648D 1903-10-22 1903-10-22 Pipe, especially drill pipe. AT17648B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
AT17648T 1903-10-22

Publications (1)

Publication Number Publication Date
AT17648B true AT17648B (en) 1904-09-26

Family

ID=3520505

Family Applications (1)

Application Number Title Priority Date Filing Date
AT17648D AT17648B (en) 1903-10-22 1903-10-22 Pipe, especially drill pipe.

Country Status (1)

Country Link
AT (1) AT17648B (en)

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