Notes on fundamental bit design

Journal Article · Wed Oct 01 04:00:00 EDT 1986 · Drilling-DCW; (United States)

OSTI ID:5950850

Jumo, A C

This paper points out that the standard industry bit in use in 1951 was a three-cone, steel-tooth bit utilizing slush-lubricated ball and roller bearings and drilled water courses. By the mid-1950s, sintered tungsten carbide tooth bits with jets that direct drilling fluid into the bottom of the hole were perfected. These bits traditionally were used only in very hard formations while steel bits were used for other formations. In the early 1960s, the pressure compensated lubrication system and sealed ball- and roller-bearings were developed. By 1970, pressure-compensated sealed lubricated bits were the standard of the drilling industry. Though their design was considerably more complicated, improved performance made them more economical. Extended bearing life made the carbide tooth bit practical for medium hard formations.

• OSTI ID: 5950850
• Journal Information: Drilling-DCW; (United States), Journal Name: Drilling-DCW; (United States) Vol. 47:10; ISSN DRDCD
• Country of Publication: United States
• Language: English

Related Subjects

42 ENGINEERING
420206* -- Engineering-- Mining & Drilling Equipment & Facilities-- (1980-1989)
ALLOYS
BEARINGS
CARBIDES
CARBON COMPOUNDS
DESIGN
DOCUMENT TYPES
DRILL BITS
DRILLING
DRILLING EQUIPMENT
DRILLING FLUIDS
ECONOMIC DEVELOPMENT
EQUIPMENT
FLUID MECHANICS
FLUIDS
HISTORICAL ASPECTS
HYDRAULICS
IRON ALLOYS
IRON BASE ALLOYS
LUBRICATION
MECHANICS
REFRACTORY METAL COMPOUNDS
REVIEWS
ROCK DRILLING
SEALS
STEELS
TRANSITION ELEMENT COMPOUNDS
TUNGSTEN CARBIDES
TUNGSTEN COMPOUNDS