Author
UNICEF

Year of Publishing
2009

Publisher
UNICEF

Institution
Practica Foundation, EnterpriseWorks/VITA

Manual Drilling Techniques

Description:

When a borehole is drilled, different types of sediment and rock layers can be encountered. To drill through all these different layers a range of manual drilling techniques have been developed and are used around the globe. In each case the drilling technique must (a) break or cut the layers, (b) remove the cut material from the hole, and (c) if necessary provide support to the walls of the hole, to prevent collapse during drilling.

DISCLAIMER: This is a non-RWSN publication and endorsement by RWSN or any of its member organisations should not be inferred.


Bibliographical Information:

UNICEF (2009) Manual Drilling Techniques. , Practica Foundation, EnterpriseWorks/VITA , UNICEF


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