Wireline drill rods, diamond drill rods

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• Product description：Wireline drill rods or named diamond drill rods are manufactured by CNC machines; in exploration diamond drilling, a diamond drill bit is attached to the end of wireline drill rods to cut a core.
• Our wireline drill rods are manufactured by CNC machines, and made of high quality alloy steel. All our wireline drill rods are heat treated.
  General Characteristic:
  * Both ends thickened;
  * Good concentricity;
  * High precision;
  * Long life.
  
  The specifications for wireline drill rods we are supplying.

  Size	O.D	I.D	Weight (kg/3m)	Desc
  BQ	55.6mm	46.1mm	18.0	Heat treated at two ends
  NQ	69.9mm	60.3mm	23.5
  HQ	88.9mm	77.8mm	34.5
  PQ	114.3mm	101.6mm	52.2

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  Exploration diamond drilling differs from other geological drilling, which utilizes an annular diamond drill bit attached to the end of hollow drill rods to cut a cylindrical core of solid rock for examination on the surface. The core does not drop out of the inside of the core barrel when lifted because either a split ring core lifter or basket retainer allow the core to move into, but not back out of the tube. Drilling of 1200 to 1800 metres is common and at these depths, ground is mainly hard rock, so diamond drill rigs need to drill slowly to lengthen the life of drill bits and rods, this drilling method cost are very expensive.
  Drilling Steps:
  1. To mount drill rods, bits, and core barrel etc drilling tools with a diamond drill rig.
  2. To utilize a diamond drill bit attached to the end of drill rods to cut a cylindrical core of solid rock.
  3. To retrieve the core samples to the surface by retracting the winch cable which located on the top end of the core barrel, lowered inside the rod string.
  4. To remove the core sample from the core barrel, break it into small pieces to make it fit into the sample trays and catalogue.