TRIDENT TOOL INC.
CABLE TOOL ROCK BITS
Good Bit Better"
The world's best and largest
images below for pricing and availability.
Our premium hard rock bit with its full gauge and flat
face can handle almost any formation from granite and basalt to limestone,
hard sandstone, dolomite or any other formation that you may encounter.
This is the most commonly used all-around bit.
Available in sizes 3-7/8" through 10"
What Bit Should You Use?
The penetration rate you now average should help determine
the Trident bit you choose. Trident offers bits for soft, medium or hard
formations, as well as special purpose bits. Here are some rule-of-thumb
guidelines for the terms "Hard," "Medium" and 'Soft" formations for cable
tool well drilling.
SUPREME or DROP CENTER
Penetration Rates Up to 3 Feet Per Hour
SUPREME or DROP CENTER
Penetration Rates 3 to 5 Feet Per Hour
DROP CENTER or SOFT ROCK
Over 5 Feet Per Hour
For hard and unconsolidated
formations, the "Drop Center" has a full gauge and a concave face. It can
be used in granite, basalt, limestone, hard sandstone, dolomite, hard pan
or any formation that has unconsolidated material mixed with hard rock.
The concave face allows cuttings to escape faster, provides a higher 'unit
load' on impact and helps keep the bit centered facilitating a straighter
SOFT ROCK "SR"
The "SR" is for soft rock drilling. It features a
concave face and extra "chip channels" for shale, slate, clay, soft
sandstone or soft to medium limestone. The extra chip channels allow
larger cuttings to get past the bit faster reducing re-drilling of settled
material. This bit is designed for aggressive digging action.
SPECIAL PURPOSE BITS
RECOMMENDED TOOL WEIGHT
200-250 lbs. Per Inch of Hole Diameter
(Example 6" hole - 6 x 200 = 1200 lbs, etc.)
4" = 800 - 1000 lbs
5" =1000 - 1250 lbs
6" =1200 - 1500 lbs
8" = 1600 - 2000 lbs
10" = 2000 - 2500 lbs.
12" = 2400 - 3300 lbs
TOO LIGHT MIGHT SLOW PROGRESS
TOO HEAVY MIGHT CRUSH CARBIDES
Above weights based upon 18"-24" stroke length. When in
hard rock it is best to use a shorter stroke and increase the strokes per
Named for the backwards "Z"
appearance of the face, this bit was designed for drilling in gravel, sand
or rock formations mixed with these materials. The leading edge has a
'scooping' action. The reduced shoulder area allows gravel to fall easily
past the bit reducing likelihood of becoming wedged between bit and
casing. The carbide inserts fracture any hard rock encountered in these
types of formations.
The bit head is offset from the center
line 1/2" allowing the bit to over drill approx. 1" in one full rotation.
This design allows a bit made to drill an oversized hole to fit through
standard sized casing. It can be effective when setting casing into rock
or through boulders.