Pneumatic penetration recorder
United States Patent 3214762

Inventors:
Winkle, Roy Van L.
Lankford Jr., William L.
Publication Date:
10/26/1965
View Patent Images:
Download PDF 3214762 pdf       PDF help
Export Citation:
Click for automatic bibliography generation
Assignee:
GEOLOGRAPH COMPANY
Primary Class:
346/33R
Other Classes:
73/316, 73/866.100, 346/33WL, 73/432.100, 73/152.440, 346/49
International Classes:
E21B45/00
US Patent References:
2981102Well depth recorder
3010777Recorder with selective five foot marker
3054295Method and apparatus for determining rate of pressure change
3071006Transmission means
3076966Rate of penetration and weight recorder
3084550Pneumatic servo control
3100399Pneumatic servo-positioner unit
3102426Pressure fluctuation recorder
3124410
3125399
3129997Well depth recorder and associated pen return