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Baptist Drilling
Baptist drilling is similar to hand sludging, with some percussion drilling combined. The main difference is that while sludging relies on a person’s hand at the top of the drill pipe as a valve, the Baptist method uses on a valve at the bottom of the drill stem.
The drilling process is continuous, ie the drill pipe and bit is normally not removed from the borehole until it is finished. Drill cuttings are pumped to the surface by the drilling liquid (mud). The percussion action is performed by lifting the drill stem with a rope over a pulley, attached to a simple derrick, made with whatever available wood or bamboo poles. The diameter is kept as small as possible with drill bits made from 1¼” (32 mm) internal diameter iron plumbing accessories. Wells are usually with a cheap 1½” (39 mm) PVC pipe, which can accommodate a 1¼” PVC piston pump. Larger diameter can be reamed if required.
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