Drilling mud level measurement

Details Drilling mud level measurement Drilling mud level measurement

G - Physics

01

F

349/38

G01F 23/28 (2006.01) E21B 21/08 (2006.01) G01F 23/296 (2006.01)

Patent

CA 1127286

DRILLING MUD LEVEL MEASUREMENT ABSTRACT OF THE DISCLOSURE An accurate measurement of the level of drilling mud in a mud pit is provided using an ultrasonic transducer that includes ambient temperature correction. A cylindrical metal shroud open at the bottom is positioned around the transducer. A series of vent holes are located along the upper area of the shroud to allow the convection of ambient air. A series of Nylon screws extend through the shroud close to the transducer to limit lateral move- ment of the transducer within the shroud. As the shroud and trans- ducer become heated by sunlight, ambient air is circulated from the surface of the drilling mud upward to the transducer through the space between the transducer and the sidewalls of the shroud and out through the vent holes. The chimney effect thus produced insures that the temperature correction accurately represents the temperature of the ambient air between the drilling mud and transducer. 1a

319749

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