Drilling assembly for percussion drilling of deep wells

Patent · Tue Sep 22 00:00:00 EDT 1987

OSTI ID:5826174

Kennedy, J D

A percussion drill assembly for down hole drilling is described comprising: an elongated chamber defining a barrel assembly; a top sub assembly connected to one end of the barrel assembly and having passage means; a driver sub assembly connected to the other end of the barrel assembly; a hammer assembly disposed within the chamber and having an axially extending flushing passage and fluid intake and fluid exhaust passages; an anvil and bit shank assembly disposed within the chamber and having an axial flushing passage disposed within the driver sub assembly; a fluid distributing means disposed within the barrel assembly to receive an operating fluid for causing reciprocal movement of the hammer assembly; a tube extending through the flushing passage of the distributing means and the hammer assembly for passing a flushing fluid therethrough separate from the operating fluid.

• Assignee: NOV; NOV-87-083356; EDB-88-002453
• Patent Number(s): US 4694911
• OSTI ID: 5826174
• Resource Relation: Patent File Date: Filed date 25 Feb 1985
• Country of Publication: United States
• Language: English

Related Subjects

42 ENGINEERING
PERCUSSIVE DRILLS
DESIGN
HYDRAULICS
OPERATION
CUTTINGS REMOVAL
DRILL BITS
DRILLING FLUIDS
FLUID FLOW
ROCK DRILLING
WELL DRILLING
DRILLING
DRILLING EQUIPMENT
DRILLS
EQUIPMENT
FLUID MECHANICS
FLUIDS
MECHANICS
REMOVAL
420206* - Engineering- Mining & Drilling Equipment & Facilities- (1980-1989)