EP 0162000 A1 1985-11-21 - Top drive well drilling apparatus with removable link adapter.
Top drive well drilling apparatus with removable link adapter.
Bohrvorrichtung mit oberem Antrieb und auswechselbaren Bügelanschlüssen.
Appareil de forage de puits à entraînement au sommet comportant un raccord amovible à anse.
US 60091384 A
A well drilling apparatus having a drive unit for rotating a drill string (27). A stem (25) extends downward from the drive unit, and during tripping a link adapter (35) is removably connected to the stem (25). During tripping, an elevator (31) is suspended from the link adapter (35) by a pair of links (33), and the drill string (27) is held by the elevator (31).
IPC 1-7 (main, further and additional classification)
IPC 8 full level (invention and additional information)
CPC (invention and additional information)
Citation (search report)
- [X] US 3915244 A 19751028 - BROWN CICERO C
- [X] US 4209066 A 19800624 - WATSON BARRY R [US]
- [X] US 3776320 A 19731204 - BROWN C
- [X] FR 2146954 A1 19730309 - HOURCADE LOUIS [FR]
- [A] US 3857450 A 19741231 - GUIER W
- [A] US 1967517 A 19340724 - ROGERS WALTER A
- [A] US 4396216 A 19830802 - HAMILTON WILLIAM R
Designated contracting state (EPC)
DE FR GB