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Sludging - Asian sludge

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{{Language-box|english_link= Sludging - Asian sludge | french_link= Coming soon | spanish_link= Coming soon | hindi_link= Coming soon | malayalam_link= Coming soon | tamil_link= Coming soon | swahili_link=coming soon | korean_link= Coming soon | chinese_link=除泥-亚洲除泥法 | indonesian_link= Coming soon | japanese_link= Coming soon }} [[Image:Icon_sludge.png|right|80px]]

[[Image:Cross section of an Asian sludge.jpg|thumb|right|200px| Cross section of an Asian sludge]]

[[Image:Asian sludge.jpg|thumb|right|200px|Asian sludge]]

[[Image:Asian sludge in action.jpg|thumb|right|200px| Asian sludge in action]]

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Sludging is a manual drilling technique in which water is circulated to bring the cuttings to the surface. The drill pipes are moved up and down. On the down stroke, the impact of the drill bit loosens the soil and on the up stroke, the top of the pipe is closed by hand (or a valve), drawing up the water through the pipe and transporting the cuttings to the surface. On the next down stroke, the hand (or valve) opens the top of the pipe and the water squirts into a pit, in front of the well. In this pit, the cuttings separate from the water and settle out, while the water overflows from the pit back into the well.

===Manuals, videos and links===

* [http://wwwec.practicafoundationeuropa.nleu/echo/files/evaluation/wp-contentwatsan2005/uploadsannex_files/PDFPRACTICA/PracticaPRACT2%20drilling20-%20Rs20Rota-sludge%20versie20and%201th20stone%20september20hammer%200520drilling.pdf Rota-sludge and Stone Hammer drilling, part one: Drilling Manual] by Practica Foundation. [http://www.practicafoundationsswm.nlinfo/wp-contentsites/default/uploadsfiles/PDFreference_attachments/practica-production-rs-versie-1th-september-051HERWIJNEN%202005%20Rota%20Sludge%20and%20Stone%20Hammer%20Drilling%20Part%20two%20Production%20Manual.pdf Rota-sludge and Stone Hammer drilling, part two: Production Manual] by Practica Foundation.

* Drilling & well construction reference manual, Lifewater Canada, update 2004. Internet manual on hydrogeology, well construction, all drilling techniques, hand pumps and more. [http://www.lifewater.ca/download/Lifewater_Drilling_Manual_2004.pdf Download manual]. Other information can be found on the [http://www.lifewater.ca/ Website of Livewater].

* A Water Handbook, Technical Guidelines Series, UNICEF, 1999 - Programming and implementation. [http://www.unicef.org/wash/files/Wat_e.pdf Download].

* Technology notes, section 7; Tube wells and boreholes, WaterAid - An overview of human-powered drilling technologies. [httphttps://www.wateraiddropbox.orgcom/documentss/plugin_documentsdc2lhxx7p657i2v/technology_notes_2008WaterAid_technology_notes.pdf ?dl=0 Download]. Website of [http://www.wateraid.org/uk Wateraid.org].

* Multi-service procedures for well-drilling operations, field manual chapter 9, US Military Chapter 9, alternative well construction, manual drilling techniques - [http://www.paulsawyersnavybmr.com/pdfsstudy%20material/14080a/FM_5_48414080A_ch9.pdf Download].

===Acknowledgements===

* The basis for the material on this page was obtained from a desk study shortly to be published on the website of the [http://www.practicafoundationpractica.nl/ org Practica Foundation], and from the [http://www.rural-water-supply.net/ Rural Water Supply Network], and specifically its [http://www.rural-water-supply.net/en/implementation/manual-drilling manual drilling section].

* [http://www.lboro.ac.uk/well/resources/technical-briefs/43-simple-drilling-methods.pdf 43. Simple drilling methods.] WEDC.

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