Roller bit type A, 3 rows

Casing - uncased

uncased

Range of application - Compact rock from 100 Mpa up to about unreinforced concrete 250 Mpa

Compact rock from 100 Mpa up to about unreinforced concrete 250 Mpa

Equipment - Kelly box 200 mm, easily exchangeable tapered roller bits with carbide pins, teeth and conveyance flights for transporting the drill cuttings. Easily exchangeable hard metal wear plates and hardfacing as wear protection

Kelly box 200 mm, easily exchangeable tapered roller bits with carbide pins, teeth and conveyance flights for transporting the drill cuttings. Easily exchangeable hard metal wear plates and hardfacing as wear protection

Casing - cased

cased

Range of application - Compact rock from 100 Mpa up to about unreinforced concrete 250 Mpa

Compact rock from 100 Mpa up to about unreinforced concrete 250 Mpa

Equipment - Kelly box 200 mm, easily exchangeable tapered roller bits with carbide pins, teeth and conveyance flights for transporting the drill cuttings. Easily exchangeable hard metal wear plates and hardfacing as wear protection

Kelly box 200 mm, easily exchangeable tapered roller bits with carbide pins, teeth and conveyance flights for transporting the drill cuttings. Easily exchangeable hard metal wear plates and hardfacing as wear protection