CS821082A1 - Dvojite vrtne trubky se zavitovym spojem - Google Patents
Dvojite vrtne trubky se zavitovym spojemInfo
- 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
Links
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)
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 |
-
1981
- 1981-12-22 DD DD23608681A patent/DD217682A3/en not_active IP Right Cessation
-
1982
- 1982-11-18 CS CS828210A patent/CS258407B1/en unknown
- 1982-12-22 HU HU412982A patent/HU190481B/en unknown
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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