HARVEST TOOL COMPANY LLC
UNDERREAMERS, DRILL BITS, SECTION MILLS, CASING CUTTERS, HOLE OPENERS AND PROJECTILE TOOLS

Cavity Underreamer Closed	Cavity Underreamer Open

• Air, air mist, water or drilling mud circulation may be used.
• Various tipping materials available including long life tungsten carbide rollers, tungsten carbide disc cutters, pdc (polycrystalline diamond compact) disc cutters, hardfacing.
• Increase recoverable reserves by having a lower final producable reservoir pressure.
• More efficient rock removal with lower percentage of rock disintegration and straighter hole.
• Reduced drill string torque. Easier on drill string.
• Unplagued by cuttings which cause conventional underreamers to become stuck open. 
• Easy open and close for cavity cleaning.
• Coal bed methane completions.
• Widen wellbore between cavitated zones to alleviate sloughing production bottlenecks.
• Horizontal well intersection applications.
• Underbalanced drilling of horizontal well applications.
• Enlarged holes for downhole fluid separation and collection.
• Available in short pilot nose.
• Special alloy steel with high hardness and impact strength.
• Various closed and open diameter combinations available.
• Harvest has over 12 years of record underreams and hole enlargement.
• Harvest has completed hundreds of wells to 6 foot (1829 mm) diameter or greater below 7 inch (178 mm) casing.

Tungsten Carbide Hard Faced (TC HF)	Tungsten Carbide (TC) or Polycrystalline Diamond Compact (PDC) Discs	Tungsten Carbide (TC) Inserts	Tungsten Carbide (TC) Rollers

Numerous Cavity Underreamer (CU) sizes available. Please contact us as to closed diameter to open diameter combinations.

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