Lessons in rotary drilling. unit I lesson 4. The rotating components :rotary, kelly and swivel.

Lessons in rotary drilling. unit I lesson 4. The rotating components :rotary, kelly and swivel.
Texas : Petroleum Extension Service,. 1965.
English
Text
v, 55 hlm., ilus., 28 cm.
Perpustakaan PEM Akamigas DIGITAL LIBRARY PEM AKAMIGAS (Call Number: 622.24 Pet I-I-4.)