TREA

Drives used in the borehole

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Industry

  • CPC
  • E21B4/00
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Parent Industries

EFIXED CONSTRUCTIONS E21Mining E21BEARTH DRILLING

Current Industry

E21B4/00Drives used in the borehole

Sub Industries

E21B4/003Bearing, sealing, lubricating details E21B4/006Mechanical motion converting means E21B4/02Fluid rotary type drives E21B4/04Electric drives E21B4/06Down-hole impacting means E21B4/08impact being obtained by gravity only E21B4/10continuous unidirectional rotary motion of shaft or drilling pipe effecting consecutive impacts E21B4/12Electrically operated hammers E21B4/14Fluid operated hammers E21B4/145of the self propelled-type E21B4/16Plural down-hole drives E21B4/18Anchoring or feeding in the borehole E21B4/20combined with surface drive
Industries