BALL, P. & DANERT, K.
Year of Publishing
The Low Cost Drilling Project (Cranfield University/DFID/Government of Uganda) is developing a modification of the traditional Asian sludging technology for use in Africa.
As part of the technology research a visit was made to north India to observe and measure various characteristics of this well drilling technique. The report describes these observations and draws conclusions for the Low Cost Well Drilling Project.
The method and equipment used by the Indian drillers (“mistries”) are set out, followed by an outline of the ergonomics and quantification of the work rates needed for hole cleaning and drilling. Drilling penetration rates in soft alluvium were observed to range from 16.5 to 45m per hour.
Traditional and more modern designs of casing and wellscreen, and the corresponding well completion methods, are described.
The cost of a 12m water well drilled by sludging in North West Bengal is estimated at Rs200 (approximately £3-4).
Practical conclusions are drawn in relation to equipment design for Uganda or elsewhere in sub-Saharan Africa.
DISCLAIMER: This is a non-RWSN publication and endorsement by RWSN or any of its member organisations should not be inferred.
BALL, P. & DANERT, K. (1999) Hand Sludging - A Report From North West Bengal. Report of DFID KAR Project R7126 “Private Sector Participation in Low Cost Water Well Drilling”, , Silsoe College , Cranfield University , Bedfordshire, UK
Hand Sludging - A Report From North West Bengal
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