Annulus bypass peripheral nozzle jet pump pressure differential drilling tool and method for well drilling

Patent · Tue Dec 23 04:00:00 EST 1986

OSTI ID:6901193

Hooper, D W

A pressure differential drilling tool is described for reducing circulating fluid pressure in a drilling zone at the bit-to-bore bottom interface of a drill bit operated by a drilling string to continuously make hole in a well bore and including; a body coupled to the lower end of the drilling string and carrying the drill bit for bit-to-bore bottom engagement and conducting circulating fluid under pressure and for removing formation chips from the bore bottom, and a pressure expandable plug-stabilizer rotatably surrounding the body on bearings to advance down-hole therewith and having expansion limiting means restricting the plug-stabilizer to less then the diameter of the well bore for free sliding engagement therein.

• Assignee: NOV; NOV-87-041388; EDB-87-043417
• Patent Number(s): US 4630691
• OSTI ID: 6901193
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
020300* -- Petroleum-- Drilling & Production
03 NATURAL GAS
030300 -- Natural Gas-- Drilling
Production
& Processing
42 ENGINEERING
420206 -- Engineering-- Mining & Drilling Equipment & Facilities-- (1980-1989)
CIRCULATING SYSTEMS
CLOSURES
CONTROL
CUTTINGS REMOVAL
DIFFUSERS
DRILL BITS
DRILL PIPES
DRILLING
DRILLING EQUIPMENT
DRILLS
EQUIPMENT
JET DRILLS
MOTION
NATURAL GAS WELLS
NOZZLES
OIL WELLS
PIPES
PRESSURE CONTROL
PRESSURE EFFECTS
PUMPS
REMOVAL
ROTATION
WELL DRILLING
WELLS