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Jetting - Engine powered rotary jetting

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{{stubLanguage-box|english_link= Jetting - Engine powered rotary jetting | 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=喷射-由引擎发动的旋喷 | indonesian_link= Coming soon | japanese_link= Coming soon }}[[Image:Treadle_pump_iconJetting icon.png|right|80px]]__NOTOC__[[Image:Rotary rig in Chad.jpg|thumb|right|250px|Rotary rig in Chad]]Engine powered rotary jetting is a [[Jetting - general| jetting technique]] in which engine power is used to rotate the drill stem and pump the mud. A large variety of engine powered rotary jetting rigs are used. Examples of commercial versions used in developing countries are the Lone Star 100, the PAT Drill 201 and the Deep Rock Hydra drill; but many more exist.

A Although one would expect a large variety of advantage over manual jetting, engine powered operated rotary jetting requires the same time and reaches the same depths as the manual operated rotary jetting rigs are used. Examples The systems show better performance only with regard to ergonomic aspects. <br>{|style="border-style: solid; border-width: 1px 1px 1px 1px; text-align: center; background-color: #efefef" align="none" width="60%" |-|[[Image:Rotary rig in Chad.jpg|thumb|none|200px|Rotary rig in Chad]]|[[Image:Self made rotary rig.jpg|thumb|none|200px|Self made rotary rig]]|[[Image:Diagram of commercial versions used in developing countries are the Lone Star 100, LS100.jpg|thumb|none|200px|Diagram of the LS100]]|[[Image:PAT Drill drill 201 and the Deep Rock Hydra .jpg|thumb|none|200px|PAT drill; but many more exist. 201]]|}

Although one would expect a large advantage over manual jetting, engine operated rotary jetting requires the same time and reaches the same depths as the manual operated rotary jetting. The systems show better performance only with regard to ergonomic aspects.

===Suitable conditions ===

Suitable for weakly cohesive sands and silts.

{{procontable | pro=

- Better performance with regard to ergonomic aspects than manual jetting rigs

|con=

- Does not increase speed or depth as compared to manual operate rotary jetting rigs.

}}

{| border="1" cellpadding=Construction, operations and maintenance"5" cellspacing="0" align="none"|-[[Image! width="50%" style="background:#efefef;" | Advantages! style="background:Diagram of the LS100.jpg#f0f8ff;" |thumbDisadvantages|right-|250pxvalign="top" |Diagram of the LS100]]- Better performance with regard to ergonomic aspects than manual jetting rigs[[Image:PAT drill 201.jpg|thumbvalign="top" |right- Does not increase speed or depth as compared to manual operate rotary jetting rigs. |250px|PAT drill 201]]}  [[ImageFile:Self made rotary rigDrilling Method Selection.jpg|thumb|rightnone|250px750px|Self made rotary rigThis table may be used as a guide in the selection of the most appropriate drilling methods. Credit: WEDC.]]

===Construction, operations and maintenance===

A self made engine-driven rotary rig is not very difficult to make, although drill bits, drill pipes and engine may have to be specially imported.

===Costs===

The price of these rigs depends and varies between US$ 3000 and US$ 5000.

===Field experiences===

Engine operated rotary jetting is mainly used in Thailand, Laos, Cambodia, Chad, Niger, Nigeria, Burkina Faso, Tanzania, Mozambique, Zambia, Mauritania, Madagascar and Nicaragua.

==Reference manuals=Manuals, videos, and links===* [http://www.pat-drill.com PAT-Drill ] - Engine powered drilling equipment and small machines – . * [http://www.pat-drilllonestarbit.com* Lone Star Bit ] - Engine powered drilling equipment and small machines - .* [http://www.lonestarbitdeeprock.com* Deep Rock ] - Engine powered drilling equipment and small machines- .* [http://www.deeprockdrillingfab.com* Drillingfab ] - Engine powered drilling equipment and small machines - http://www.drillingfab.com

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

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Winona

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