Double casing drilling equipment

Two Independent Rotary Heads
Separately drives the outer casing and the inner drill string and are typically mounted on separate sleds which can be adjusted independently to control the position of the inner string in relation to the casing bit.
Casing bits for dual rotary systems are ring bits with tungsten carbide inserts.
The carbide insert is typically a scraping type.

Male/female friction welded double-start rotary percussive casing

Description

Double casing drilling equipment

Double casing drilling equipment/Casing shoe for well drilling

Rock drilling tools manufacturer ProDrill:

The two rotary heads are typically mounted on separate sleds which can be adjusted independently to control the position of the inner string in relation to the casing bit.
The inner bit can be advanced in front of the casing bit to act as a pilot bit for the casing string or it can be retracted inside the casing crown reaming bit to better contain flushing inside the casing.

Service

The technical support team may provide remote or on-site support to resolve issues encountered by users during use.
Provide original spare parts to ensure timely replacement of worn or damaged parts to maintain the normal operation of DTH bits.
Timely information reply throughout the day, the first time to solve your problems.