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Jetting - general

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Jetting is based on water circulation and water pressure. As opposed to sludging, water is pumped down the drill pipe and the ‘slurry’ (water and cuttings) is transported up the borehole between the drill pipe and the borehole wall. A motor pump is used to achieve an adequate water flow. The drill pipe may simply have an open end, or a drill bit can be added. Partial or full rotation of the drill pipe can be used. Thickeners (additives) can be added to the water in order to prevent hole collapse and reduce loss of working water (drill fluid).

===Manuals, videos and links===

* [http://www.unicef.org/malawi/MLW_resources_qualityassureboreholes.pdf CONSULTANCY SERVICES: QUALITY ASSURANCE OF UNICEFDRILLING PROGRAMES FOR BOREHOLES IN MALAWI .] UNICEF, 2011.

* Robert Vuik, [http://www.practica.org/wp-content/uploads/services/publications/drilling%20manuals/EN/Jetting%20manual%20drilling%20PRACTICA%20EN.pdf Jetting: Manual Drilling Series, TECHNICAL TRAINING HANDBOOK ON AFFORDABLE MANUAL WELL DRILLING]. Practica Foundation, June 2010. French version: [http://www.practica.org/wp-content/uploads/services/publications/drilling%20manuals/FR/Jetting%20manual%20drilling%20PRACTICA%20FR.pdf FORAGE AU LANCAGE A L’EAU].

* [http://www.lifewater.ca/manualsresources.htm ManualsLifewater Resources] on hydrogeology, well construction, all drilling techniques, hand pumps and more. Lifewater Canada, update 2004.

* [http://www.wellspringafrica.org Manuals] on Percussion drilling, well construction, manufacturing tools. Cliff Missen, Wellspring Africa, draft 4.

* [http://www.ghanamissionghanawashproject.org/AA%20Drilling%20Manualwp-content/uploads/2012/07/36_Conference_Paper_Manual-Drilling_Ghana_Naugle-1.pdf Professionalization of Manual Drilling Water Wells by Handin Ghana.] GWAMGhana WASH Project, Ghana. * [http://www.lifewater.ca/resources/link-drilling.htm Manuals and drilling links]. Life Water.

* [http://docs.watsan.net/Scanned_PDF_Files/Class_Code_2_Water/212.5-79WE-7794-1.pdf Wells Construction: Hand dug and Hand drilled.] Richard Brush, Peace Corps 1980.

* [http://www.worldcat.org/title/shallow-wells/oclc/008463099 Shallow Wells.] DHV Consulting Engineers, 1978.

* [http://www.rwsnwatersanitationhygiene.chorg/documentationReferences/skatdocumentationEH_KEY_REFERENCES/WATER/Drilling/Hand%20Drilled%20Boreholes/Human%20Powered%20Drilling%20%28Cranfield%20University%29.2005-11-15.5533687184/file pdf Human-Powered Drilling Technologies.] Richard Carter, Cranfield University, 2005.

* [http://www.rural-water-supply.net/en/resources/details/148 Drilling Boreholes for Hand pumps.] Peter Wurzel, SKAT Switzerland, 2001 - A book on hydrogeology, well construction, drilling techniques, well development.

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