What Does Sonde Housing Mean?
Sonde housing can be defined as a housing for the drill string with a cylindrical cavity to house a transmitter sonde.
There are two types of housing namely the end-load sonde housing and the side-load sonde housing. The sonde housing protects the instrument from loss or damage during drilling operations. The sonde placed inside the drill head transmits electromagnetic signals that are used to track the progress of the drill head.
The results are displayed on a monitor as the walkover proceeds.
Trenchlesspedia Explains Sonde Housing
In the end-load sonde housing, the sonde is loaded from one end of the housing and secured. To access the sonde, the connection between the housing and drill stem has to be broken since no separate access door is provided. This design, however, allows for larger volume of drilling fluids to be pumped through the drill pipe and tool. The electronics are well secured in this design and is rarely lost during boring.
The side-load sonde housing is used for smaller machines and allows easy access to the sonde for maintenance, battery change or replacement. The sonde is installed through an opening in the side of the housing long enough to insert laterally. The sonde is inserted and secured in place and a lid is attached to the housing to protect the sonde.
Compared to end-load sonde housing, it allows for a lesser amount of fluid to be pumped through the drill pipe.