Rotary drill bit

Rotary drilling bits are classified into the following types ... [Pg.769]

The rotary drill bits are generally made from quench and tempered steel alloys such as AISI 3115 to 3120, 4620, 4815 to 4820 and 8620 to 8720. The only corrosion related problem that can arise may result from a hydrogen sulfide environment. The bearing in the roller rock bits can be damaged by H S contamination of drilling fluid. However, a well conditioned drilling fluid at... [Pg.1258]

Natural gem-quality diamonds are expensive and difficult to machine and fabricate into useful shapes for general industrial purposes. Except for a few cases (i.e., diamond-studded rotary drill bits, dressers, diamond-tipped glass cutters, fine superabrasive powders... [Pg.380]

EXXON. 1986. Rotary drill bits. 2nd Quarter Report, EXXON, Houston, TX, pp. 16-23. [Pg.510]

Big Chemical Encyclopedia

Chemical substances, components, reactions, process design ...