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     The dart valve bailer is used to remove cuttings as the hole is drilled. Generally four to six feet of hole can be drilled on each run, but field conditions will determine the best procedure. When drilling a consolidated formation the bailing operation is quite regular. After each run, tools are pulled from the hole and swung aside while the bailer is used. When the bailer is lowered to the bottom of the hole the dart valve opens to permit intake of water and cuttings. The bailer is then surfaced and set down on the ground forcing the dart valve into the bailer body and releasing water and cuttings. Occasionally foreign matter may wedge the dart valve in open position. Obstructions should be removed so bailer can retain its load.

     Periodic inspection of the bailer should be made to assure the bailer bail and dart valve bottom are securely welded to the tube.

     Bailers can also be furnished in flat valve bottom pattern.
 

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