NQ Wireline Double Tube Core Barrel Assembly For Deep Hole Hard Rock Coring 
  
Size Available:
 
 B76 core barrel, B86 core barrle, B101 core barrel, B131 core barrel, B146 core barrel
 BQ core barrel NQ core barrel, HQ core barrel PQ core barrrel, NQ3 core barrel, HQ3 core barrel, PQ3 core barrel
 TT-46 core barrel TT56 core barrel
 T2-56 core barrel, T2-66 core barrel, T2-76 core barrel, T2-86 core barrel, T2-101 core barrel
 T6-76 core barrel T6-86 core barrel T6-101 core barrel T6-116 core barrel T6-131 core barrel T6-131 core barrel
 NMLC core barrel, HMLC core barrel
 HWF core barrel, PWF core barrel
 NWG core barrel, HWG core barrel
 LTK48 core barrel
 M101 core barrel
 412 F core barrel
 
 Chinese Standard: Wireline 56, wireline 59, wireline 75, wireline 91...
Wireline drilling is the special method of removing the core. When the driller wants to remove core from a conventional core drill, the entire core barrel has to be removed from the hole. This is time-consuming, as each rod has to be removed one at a time. With wireline drilling, a barrel of core can be removed from the bottom of the hole without removing the rod string. When the driller wants to remove the core, an overshot is lowered on the end of a wireline. The overshot attaches to the back of the core barrel inner tube and the wireline is pulled back and the inner tube disengages itself from the barrel.
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Specification:
| Q Series Wireline Double Tube Core Barrels | |||
| Size | Hole(mm) | Core(mm) | Head Thread | 
| BQ | 59.3 | 36.2 | BQ rod box | 
| NQ | 75.2 | 47.6 | NQ rod box | 
| HQ | 95.6 | 63.5 | HQ rod box | 
| PQ | 122 | 85 | PQ rod box | 
| Q Series Wireline Triple Tube Core Barrels | |||
| Size | Hole(mm) | Core(mm) | Head Thread | 
| NQ3 | 75.2 | 45 | NQ rod box | 
| HQ3 | 95.6 | 61 | HQ rod box | 
| PQ3 | 122 | 83 | PQ rod box | 
Flat : Applicable to drilling different levels of hardness or abrasive formation,generally for single and dual tube drill bits
Bottom jetting : Bottom jetting applicable to drilling sedimentary or metamorphic formations which containing more power,high coring recovery rate and avoid excessive washout of core.
