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Class Information
Number: 175/54
Name: Boring or penetrating the earth > Boring by below ground recirculation of unsupported elements (e.g., shot)
Description: Process or apparatus comprising a step or means for continuously recirculating within the bore a plurality of unsupported elements such as shot or pellets to cause such elements to directly impinge upon and disintegrate the formation.










Patents under this class:

Patent Number Title Of Patent Date Issued
8485279 Impactor excavation system having a drill bit discharging in a cross-over pattern Jul. 16, 2013
8353366 Methods of using a particle impact drilling system for removing near-borehole damage, milling objects in a wellbore, under reaming, coring, perforating, assisting annular flow, and associated Jan. 15, 2013
8353367 Methods of using a particle impact drilling system for removing near-borehole damage, milling objects in a wellbore, under reaming, coring perforating, assisting annular flow, and associated m Jan. 15, 2013
8342265 Shot blocking using drilling mud Jan. 1, 2013
8256533 Distance holder with helical slot Sep. 4, 2012
8186456 Methods of using a particle impact drilling system for removing near-borehole damage, milling objects in a wellbore, under reaming, coring, perforating, assisting annular flow, and associated May. 29, 2012
8167058 Method and assembly for abrasive jet drilling May. 1, 2012
8162079 Impact excavation system and method with injection system Apr. 24, 2012
8113300 Impact excavation system and method using a drill bit with junk slots Feb. 14, 2012
7997355 Apparatus for injecting impactors into a fluid stream using a screw extruder Aug. 16, 2011
7987928 Injection system and method comprising an impactor motive device Aug. 2, 2011
7909116 Impact excavation system and method with improved nozzle Mar. 22, 2011
7798249 Impact excavation system and method with suspension flow control Sep. 21, 2010
7757786 Impact excavation system and method with injection system Jul. 20, 2010
7503407 Impact excavation system and method Mar. 17, 2009
7493966 System and method for drilling using a modulated jet stream Feb. 24, 2009
7445058 Nozzle unit and method for excavating a hole in an object Nov. 4, 2008
7431104 Device for transporting particles of a magnetic material and tool comprising such a device Oct. 7, 2008
7419014 Fluid jet drilling tool Sep. 2, 2008
7398838 Impact excavation system and method with two-stage inductor Jul. 15, 2008
7398839 Impact excavation system and method with particle trap Jul. 15, 2008
7383896 Impact excavation system and method with particle separation Jun. 10, 2008
7343987 Impact excavation system and method with suspension flow control Mar. 18, 2008
6152356 Hydraulic mining of tar sand bitumen with aggregate material Nov. 28, 2000











 
 
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