Inner Tube Assembly Of Bq Nq Hq Pq Core Barrel Diamond Core Bit Geological Wireline Drilling Tool

Inner Tube Assembly Of Bq Nq Hq Pq Core Barrel Diamond Core Bit Geological Wireline Drilling Tool

>> Introduction

A wireline coring system includes core barrel assembly and overshot assembly.The core barrel assembly is composed of inner tube group and outer tube group.Inner & outer tubes have standard length of 1.5 meters and 3 meters.

The head assembly provides: latching and pivoting spearpoint mechanisms to allow insertion and retrieval of the inner tube assembly, a bearing assembly to allow the inner tube to remain stationary and avoid sample damage while drilling, fluid pressure operating indications and fluid control valves.

All head assemblies incorporate a shut off valve assembly which provides a fluid pressure signal to the drill operator when the valve members are compressed, indicating a full or blocked inner tube.

The core barrel assembly is composed of the inner-tube group and outer-tube group.The inner-tube group is composed of:Head Assembly,Inner Tube,Core Lifter Case,Core Lifter,Stop Ring.
The inner-tube group collects the core sample during the drilling process and is independent of the outer-tube group. The outer-tube group is composed of the remainder of the core barrel components:

Locking Coupling,Adapter Coupling,Outer Tube.
The outer-tube group always remains at the bottom of the hole and houses the inner-tube group during the drilling process.

Q series wireline core barrels are available in AQ,BQ,NQ,HQ and PQ standards.

>> PQ Head Assembly structure diagram

ID# Item Decription Unit Weight(kg) 1-25 Head Assembly PQ-TKZC Set 23.00 1 Spearhead PQ-TK-LMT Pc 1.68 2 Detent Spring PQ-TK-DWTH Pc 0.01 3 Detent pin PQ-TK-DWX Pc 0.07 4 Spearhead point base PQ-TK-MTZ Pc 1.89 5 Latch retracting case PQ-TK-HSG Pc 3.42 6 Spring pin TXX-18*55 Pc 0.05 7 Spring pin(2) TXX-18*72 Group 0.12 8 Latch Spring PQ-TK-ZH Pc 0.02 9 Latch(2) PQ-TK-TKB Pair 0.66 10 Spring pin(2) TXX-13*60 Group 0.06 11 Spring pin TXX-13*75 Pc 0.03 12 Latch base PQ-TK-TKZ Pc 0.24 13 Upper latch body PQ-TK-TKJ Pc 5.45 14 Landing shoulder PQ-TK-XGH Pc 0.39 15 Circlip KYDQ-85 Pc 0.02 16 Stover lock nut PQ-TK-TJLM Pc 0.53 17 Spindle PQ-TK-ZZ Pc 3.88 18A Shut-off valve hard PQ-TK-FP Pc 0.1 18B Shut-off valve soft PQ-TK-FP-H Pc 0.1 19 Adjusting washer(2) PQ-TK-JGD Group 0.3 20A Bearing ZC-52209 Pcs 0.59 20B Inner ring(2) PQ-TK-ZCNT Group 0.34 21 Spindle bushing PQ-TK-ZCZ Pc 2.65 22 Bearing ZC-51207 Pc 0.21 23 Compression spring PQ-TK-ZZTH Pc 0.83 24 Lock nut ZSLM-M30 Pc 0.25 25 Inner tube cap Assembly PQ-TK-NGJTZC Pc 5.54 25A Inner tube cap  PQ-TK-NGJT Pc 5.07 25B Grease fitting ZYZ-M10*1 Pc 0.01 25C Ball(2) GQ-22 Pc 0.04 25D Check valve body PQ-TK-FYG Pc 0.42

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