MODEL 75 CASING DRIVER
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| These casing drivers were designed
to be used with a down hole hammer underreamer. The underreamer drills
an oversize hole in overburdened soil, rock layers, clay bedrock, etc.
When the hole is first started and until gravity is not enough to make
the casing follow the underreamer, the casing driver just sits on top of
the casing and acts as a water diverter. When the underreamer or bit advances
1" ahead of the casing, the casing driver anvil closes, and the 75 lbs.
piston in the casing driver starts cycling. Holte casing drivers turn on
and off automatically just like a down hole hammer. The only exception
is that it doesn't blow when the anvil is hanging like a down hole hammer
does with the bit hanging.
The casing driver is 36" tall with a 9" diameter and weighs approximately 325 lbs. This casing driver is mounted under the top head of a drill rig on cylinders witha 20" stroke. The total assembly includes the drill pipe shaft that fits through the casing driver, a 1x1/4" turn ball valve, an air pressure regulator, a 50' length of 1" hose with fittings, 7.5 gallon down hole hammer oiler, and a hydraulic cylinder kit for mounting the casing driver. The drill through sub can be supplied with most any thread and made to custom lengths. The model 75 is designed for 5" and 6" or smaller casings and where weight is a serious consideration. Adapters for larger pipe can also be supplied. |
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BREAKTHROUGH
DRILLING TOOLS
P.O. Box 667,
Timmins,
Ontario, Canada.
P4N 7G2
Phone 705-267-6463
Fax 705-267-2915
extractor hammers in the hole down the hole drilling drillers carbide diamond extractor extractor extractor pipe bits