Drilling assembly for percussion drilling of deep wells

Patent · Tue Sep 22 04:00:00 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; EDB-88-002453; NOV-87-083356
• Patent Number(s): US 4694911
• OSTI ID: 5826174
• Country of Publication: United States
• Language: English

Related Subjects

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