1) Charts pressure, temperature, and other characteristics of oil and gas well boreholes or producing wells, using special subsurface instruments, and interprets findings for use in determining further drilling or producing procedures: Directs workers in assembling wire line hoisting gear and attaching line to instruments.
2) Gives directions to HOIST OPERATOR to lower clinograph into well to determine variation of well from vertical.
3) Informs ROTARY DRILLER of variation from vertical.
4) Lowers weighted wire into well and reads depth of well from recording wheel.
5) Lowers depth bomb into well that records pressure at various depths to determine rate of natural flow of oil from well.