Inclination-only survey tools provide values of borehole inclination but not azimuth.There are two types of inclination-only survey tools:

· Single-shot inclination-only survey tools

·teledrift inclination-only MWD (Scientific Drilling International)


Single-shot inclination-only survey tools (TOTCO)

Single-shot inclination-only survey tools (TOTCO)

Single-shot inclination-only survey tools are mechanical inclination indicators, often called by the trade name 'TOTCO' although they are also made by other manufacturers. They are normally owned and…

Teledrift - Inclination-only MWD

Teledrift - Inclination-only MWD

Teledrift is an inclination-only mud pulse MWD system that can measure inclinations up to 10.5º. The system is available from Scientific Drilling International (SDI).

The Teledrift is a purely…