Method for lubricating an unsealed boring bit

Patent · Fri Jun 28 04:00:00 EDT 1974

OSTI ID:6891101

Snyder, R C; Snyder, P F

A method and apparatus are described for air drilling. Water and a slight amount of certain organic additives are admixed with the air which is circulated down the drill stem, through the bit and up the annulus. Water-soluble polyalkylene glycols and a synthetic sperm oil exhibit highly desirable properties for use as the organic additives. The apparatus for practice of the invention consists of a conventional air drilling rig. The gas discharged up the annulus in the well bore carries the rock cuttings, aided by the mist created by the water and organic additives, while the passage of the mixture down the drill stem and through the passages of the bit lubricates its bearing surfaces. Means are provided for controlling the flow of additive to the air stream. (10 claims)

• Assignee: EDB-83-031142
• Patent Number(s): US 3820612
• OSTI ID: 6891101
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
020300* -- Petroleum-- Drilling & Production
ADDITIVES
ALCOHOLS
DRILL BITS
DRILLING
DRILLING EQUIPMENT
ENERGY SOURCES
EQUIPMENT
FOSSIL FUELS
FUELS
GLYCOLS
HYDROXY COMPOUNDS
LUBRICANTS
LUBRICATING OILS
LUBRICATION
OIL WELLS
OILS
ORGANIC COMPOUNDS
OTHER ORGANIC COMPOUNDS
PETROLEUM
PETROLEUM PRODUCTS
WELL DRILLING
WELLS