๐”– Bobbio Scriptorium
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Downhole turbine rotary drilling device


Book ID
103749757
Publisher
Elsevier Science
Year
1984
Tongue
English
Weight
73 KB
Volume
13
Category
Article
ISSN
0375-6505

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โœ Philip W. Johnson; William C. Lyons ๐Ÿ“‚ Article ๐Ÿ“… 1992 ๐Ÿ› Elsevier Science ๐ŸŒ English โš– 964 KB

The pneumatic turbine-powered drilling engine (PTDE) is a unique tool for directional drilling when using air or gas as the drilling fluid. The engine consists of a pneumatic turbine motor coupled to the bit by a four-stage planetary gear transmission and a thrust-bearing assembly, and is supported