This equipment allows OPTV and BHTV imaging probes and certain other types of
probe to be deployed in steeply inclined, horizontal or up-holes, where
assistance from a drilling machine is required. It has been successfully used
in boreholes exceeding 400 m in length.
The main housing containing the probe is manufactured from aluminium and the
standard kit includes 2 x 2 m aluminium rods to allow imaging probes to operate
in non magnetically disturbed conditions. A variety of nose cones, adapted to
different types of probe, and housing centraliser blades for boreholes of up to
150 mm diameter can be supplied.
Behind the housing the logging cable runs along the outside of the drill rods
(AQ or BQ recommended). The drill rod adapter incorporates a centraliser to
support the weight of the drill string.
A precise depth measurement is obtained using the lateral movement of the
drilling machine’s drive head.
Lim designs, produces and commercializes measuring instruments and solutions dedicated to drilling.