CS821082A1 - Dvojite vrtne trubky se zavitovym spojem - Google Patents

Dvojite vrtne trubky se zavitovym spojem

Info

Publication number
CS821082A1
CS821082A1 CS828210A CS821082A CS821082A1 CS 821082 A1 CS821082 A1 CS 821082A1 CS 828210 A CS828210 A CS 828210A CS 821082 A CS821082 A CS 821082A CS 821082 A1 CS821082 A1 CS 821082A1
Authority
CS
Czechoslovakia
Prior art keywords
zavitovym
vrtne
spojem
dvojite
trubky
Prior art date
Application number
CS828210A
Other languages
Czech (cs)
Other versions
CS258407B1 (en
Inventor
Hermann Beckert
Original Assignee
Hermann Beckert
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 Hermann Beckert filed Critical Hermann Beckert
Publication of CS821082A1 publication Critical patent/CS821082A1/en
Publication of CS258407B1 publication Critical patent/CS258407B1/en

Links

CS828210A 1981-12-22 1982-11-18 Double boring core barrel with threaded connection CS258407B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DD23608681A DD217682A3 (en) 1981-12-22 1981-12-22 DOUBLE TUBE BORING WITH THREADED CONNECTION

Publications (2)

Publication Number Publication Date
CS821082A1 true CS821082A1 (en) 1985-06-13
CS258407B1 CS258407B1 (en) 1988-08-16

Family

ID=5535678

Family Applications (1)

Application Number Title Priority Date Filing Date
CS828210A CS258407B1 (en) 1981-12-22 1982-11-18 Double boring core barrel with threaded connection

Country Status (3)

Country Link
CS (1) CS258407B1 (en)
DD (1) DD217682A3 (en)
HU (1) HU190481B (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19718897A1 (en) * 1997-05-03 1998-11-05 Pumpenboese Stahl Gmbh & Co Kg Double-walled pipe for drilling wells in geological structures

Also Published As

Publication number Publication date
HU190481B (en) 1986-09-29
DD217682A3 (en) 1985-01-16
CS258407B1 (en) 1988-08-16

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