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Hand Drilling
Documents on hand, or manual drilling.
Hand drilling methods can offer low cost, rapid access to shallow, unconsolidated
aquifers typically found in dambo environments (seasonally waterlogged African
wetlands).
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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.
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This report maps out the favourable zones for manual drilling and low cost pumps in parts of Madagascar. The report outlines the drilling techniques (which cost between US$80 and US$ 250 per well); the pumps (Canzee and Rope Pumps costing US$ 40 to US$ 175) and provides a series of maps of hand drilling and pump potential in the regions of Amoro I Mania, Haute Masiatra, Antisinanana. Analanjirofo, Alaotramangoro, Vatovavy Fitovinany, Anosy and Atsimo Andrefana.
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UNICEF, Practica et EntrepriseWorks/VITA ont développé une mallette pédagogique à l’intention des pays africains souhaitant s’engager dans la professionnalisation du secteur du forage manuel. Cette mallette pédagogique comprend des fiches et manuels techniques, des éléments de plaidoyer, des cartographies des zones appropriées pour le forage manuel, des études de cas, et des manuels de formation et de mise en oeuvre. Cette initiative contribue à renforcer les capacités du secteur privé local de façon à répondre aux besoins en eau potable des zones rurales qui ne cessent de croître.
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This report documents the One Million Initiative experience on borehole drilling over the years 2008-2010, contrasts current practices with the nine principles of the recently released document by the Rural Water Supply Network, “Code of Practice for Cost Effective Boreholes”, and finally proposes recommended actions.
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EMAS Drilling, developed by EMAS in Bolivia is a hybrid between washboring, percussion and conventional rotary drilling. Drilling mud (water mixed with clay or bentonite to a suitable density) is pumped down through the drill stem using a hand operated pump. The water flows back up around the drill stem, carrying up the drill cuttings. Sand and small stones are decanted, and the drilling mud is recycled through the pump.
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Hand Drilling in Bangladesh
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This document provides a short summary of each of the hand drilling techniques being utilised today; a county-by-country overview of the extent of hand drilling taking place in select countries; an annotated list of organisations involved in promoting and supporting hand drilling and an extensive list of literature, from published articles to training materials and on-line videos.
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Newsletter of the RWSN Hand Drilling Cluster Group - Volume 1 (April 2007).
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Newsletter of the RWSN Hand Drilling Cluster Group - Volume 2 (July 2007)
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RWSN Hand Drilling Cluster Group Newsletter - Volume 3 (October 2007)
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