E - Fixed Constructions – 21 – B
Patent
E - Fixed Constructions
21
B
255/89
E21B 21/00 (2006.01)
Patent
CA 1188293
ABSTRACT OF THE DISCLOSURE A drill cuttings conveying head member having a tubular duct portion which includes a movable sidewall forming a gate operable to be pivoted into a position blocking the flow passage in the duct portion and diverting the flowstream out of the conveying head during wet drilling conditions. A lever mechanism is connected to the gate and is operable to bias the gate in either the open or closed position.
417569
Gowling Lafleur Henderson Llp
Howeth D. Franklin
LandOfFree
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