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Hand auger - Vonder rig

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{{stubLanguage-box|english_link= Hand auger - Vonder rig | french_link= Coming soon | spanish_link= Coming soon | hindi_link= Coming soon | malayalam_link= Coming soon | tamil_link= Coming soon | korean_link= Coming soon | chinese_link=手钻-三脚架钻井机 | indonesian_link= Coming soon | japanese_link= Coming soon }}[[Image:Treadle_pump_icondrilling icon.png|right|80px]] __NOTOC__[[Image:Diagram of a vonder Vonder rigin action.jpg|thumb|right|150px200px|Diagram of a vonder Vonder rigin action]]__NOTOC__

The Vonder rig is a [[Hand auger - general|hand auger method]] method that uses a heavy tripod, a winch, and a working table. It has been used extensively in Zimbabwe and distributed widely in sub-Saharan Africa. The cutting tool (auger head) is rotated to cut into the ground, and then withdrawn to remove excavated material. This is repeated until the required depth is reached.

==History and social context==

The Vonder rig was developed in the early 80's and is manufactured in Zimbabwe.

===Suitable conditions ===

The Vonder rig is suitable for unconsolidated formations: sand, silt and soft clay. Stiff clays, hard materials and gravels are difficult or impossible to drill through and to remove (unless augering is combined with [[percussion - general|percussion]]).

{{procontable | proborder="1" cellpadding="5" cellspacing="0" align="center"|-! width="50%" style="background:#efefef;" | Advantages! style="background:#f0f8ff;" | Disadvantages|-| valign="top" | - Vonder rig ensures a straight borehole<br>| convalign= "top" | - Tools for vonder rig are more expensive than conventional hand augering tools<br>- Slow compared with other methods.<br>|}}[[Image:Vonder rig in action.jpg|thumb|right|150px|Vonder rig in action]]  ==Technical specification==

====Operation====

====Maintenance=Construction, operations and maintenance===[[Image:Diagram of a vonder rig.jpg|thumb|right|200px|Diagram of a vonder rig. Credit: WEDC.]]

====Manufacturing ====

[[Image:Work table and auger bit.jpg|thumb|right|150px|Work table and auger bit]]

The Vonder rig makes use of a tripod and working table and is therefore more expensive than the conventional augering tools. However, use of the worktable and tripod ensure a straight borehole.

====Suppliers====

[[Image:Work table and auger bit.jpg|thumb|right|200px|Work table and auger bit.]]

 

* V&W Engineering Ltd, Zimbabwe (49 Leyland Road, P.O.Box 131,Harare). - Produces the Vonder rig.

* [http://www.vrm.nl/ Van Reekum Materials], Netherlands - Drilling equipment, hand auger and percussion drilling - http* [https://wwwen.reekumeijkelkamp.nl* com/ Eijkelkamp Agrisearch Equipment], Netherlands - Drilling equipment and manuals on hand auger and percussion gouges - http://www.eijkelkamp.nl

    ==Cost== =Field experiences=Country experiences==

The vonder rig is widely used in Malawi, Kenya, South Africa and Zimbabwe.

===Manuals, videos and links===* Self-help wellsKOEGEL, R.G. Koegel(1985) Self Help Wells, FAO 1985. Internet manual on hydrogeologyIrrigation and Drainage Paper, well constructionsFAO, all drilling techniques Rome.ISBN 92-5-100398- X [http://www.fao.org/docrep/X5567E/x5567e00X5567E00.HTM websitehtm html version].  ==Movies== == 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.practicafoundation.nl/ Practica Foundation], and from the [http://www.rwsn.ch/ Rural Water Supply Network]CARTER, and specifically its [http://www.rwsn.ch/prarticle.2005-10-25R.9856177177/prarticleC.(2005-10-26.7220595116/prarticle.2005-11-15.6127855822 manual drilling section]. ==External Links==* ) Human-Powered Drilling Technologies, Richard Carter, Cranfield University, 2005 - An . an overview of human-powered drilling technologies - for shallow small diameter well construction, for domestic and agricultural water supply , Silsoe College , Cranfield University , Bedfordshire, UK [http://www.rwsnrural-water-supply.chnet/documentationen/skatdocumentation.2005-11-15.5533687184resources/details/file 402 Download].

* 'Private Sector Participation in Low Cost Water Well Drilling', Cranfield University, 2001. Article on private sector participation in low cost water well drilling in Africa. [https://dspace.lib.cranfield.ac.uk/bitstream/1826/3038/1/Private%20Sector%20Participation%20in%20Low%20Cost%20Water%20Well%20Drilling-2001.pdf Download].

* Rural Water Supply Network - Useful network and website for information and downloads related to Rural Water Technologies - [http://www.rwsn.ch/prarticle.2005rural-10water-25supply.9856177177net/prarticle.2005-10-26.7220595116en/implementation/prarticle.2005-11manual-15.6127855822 drilling Hand drilled wells]. General [http://www.rwsnrural-water-supply.ch net website].

* Drilling Boreholes for Hand pumps, Peter Wurzel, SKAT Skat, Switzerland, 2001 - A book on hydrogeology, well construction, drilling techniques, well development - [http://www.skat.ch/publications/prarticle.2005rural-09water-29supply.5069774463net/prarticle.2006-11-02.5180575226en/resources/skatpublication.2006-11-02.0404244520details/file 148 Download]. Website of [http://www.skat.ch SKAT]

* Low-cost shallow tube well construction in West Africa, M. Sonau, FAO - An overview of shallow tube well drilling techniques - [http://www.fao.org/docrep/w7314e/w7314e0v.htm website]. Website of [http://www.fao.org/documents/ FAO documents].

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

* [https://www.dropbox.com/s/dc2lhxx7p657i2v/WaterAid_technology_notes.pdf?dl=0 Technology notes, section 7; Tube wells and boreholes], WaterAid - An overview of human-powered drilling technologies. [http://www.wateraid.org/documents/plugin_documents/technology_notes_2008.pdf Download]. Website of [http://www.wateraid.org/uk Wateraid.org].

* Water for the World, Technical note series rws 2, USAID 1982 - Technical notes on methods of developing of groundwater, manual drilling techniques. [http://www.lifewater.org/resources/ground_water.html Website Livewater International].

* Multi-service procedures for well-drilling operations, [http://navybmr.com/study%20material/14080a/14080A_ch9.pdf field manual chapter 9, US Military Chapter 9], alternative well construction, manual drilling techniques - [http://www.paulsawyers.com/pdfs/FM_5_484.pdf Download]. ==References==

{{Joinus}}===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.practicafoundation.nl/ 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 manual drilling section].

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