Wireline Coring Equipment HQ NQ PQ Core barrel

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NQ HQ PQ NMLC HMLC T2-46 NQ3 HQ3 PQ3 wireline core barrel assembly for exploration core drilling




Wireline Coring Equipment

The wireline coring system was developed to increase production in holes where a continuous core sample is required.

This is achieved using an inner tube with a core barrel head incorporated with latches that lock into the adaptor and locking couplings at the top of the core barrel outer tube. The inner tube is lowered into the outer barrel through constant internal bore drill tubes (drill rods). It then locks in position by means of the latching mechanism but is able to rotate through the bearing section incorporated in the core barrel head.  At the end of the core run a recovery tool (overshot) is lowered through the drill string on a wireline. This locates on the top of the inner tube and retracts the latches when the wireline is hoisted. The inner tube and core can then be lifted to the surface.

This technique has considerable advantages over conventional coring as the drill string does not have to be run in and out of the hole at the end of each core run. The wireline coring system has become the favoured method of coring; particularly in deeper holes, although there is still a great deal of conventional coring carried out

Dando can supply a wide range of coring tooling items in NWL, HWL and PWL sizes. Please see below for product numbers and descriptions.

Alternatively, if you are interested in Dando’s range of wireline coring rigs please visit: Mineral Exploration Drilling Rigs





Product Number Product Description

503-1070 NWL (2 3/4") Drill Rods 3m Long (500m) Heat Treated Ends

503-1001 NWL Core Barrel 3m Complete

503-1012 NWL Core Barrel Spares

503-1050 NWL Overshot

503-1022 NWL Core Lifter

503-1023 NWL Core Lifter Case

503-1041 NWL Stop Ring

503-1044 NWL Locking Coupling

503-1045 NWL Adaptor Coupling

503-1046 NWL Landing Ring

503-1028 NWL Inner Tube Stabilizer

200-1501 NWL (3 1/2") Size Casing 3m

200-1502 NWL (3 1/2") Size Casing 1.5m

200-1504 NWL (3 1/2") Size Casing 1m

1100-1512 NWL Diamond Casing Shoe

203-1501 NWL Casing Adaptor

Product Number Product Description

502-1070 HWL (2./3'4") Drill Rods 3m

Long Heat Treated Ends

502-1001 HWL Core Barrel 3m Complete

502-1012 HWL Core Barrel Spares

502-1050 HWL Overshot

502-1022 HWL Core Lifter

502-1023 HWL Core Lifter Case

502-1041 HWL Stop Ring

502-1044 HWL Locking Coupling

502-1045 HWL Adaptor Coupling

502-1046 HWL Landing Ring

502-1092 HW Inner Tube Stabilizer

200-1401 HW (4.1/2") Size Casing 3m

200-1402 HW (4.1/2") Size Casing 1.5m

200-1406 HW (4.1/2") Size Casing 1m

1100-1403 HW Diamond Casing Shoe

203-1402 HW Casing Adaptor

Product Number Product Description

501-1070 PWL (4.1/2") Drill Rods 3m

Long Heat Treated Ends

501-1001 PWL Core Barrel 3m Complete

501-1090 PWL Core Barrel Spares

501-1050 PWL Overshot

501-1022 PWL Core Lifter

501-1023 PWL Core Lifter Case

501-1041 PWL Stop Ring

501-1044 PWL Locking Coupling

501-1045 PWL Adaptor Coupling

501-1046 PWL Landing Ring

501-1028 PW Inner Tube Stabilizer

200-1320 PW (5.1/2") Size Casing 3m

200-1321 PW (5.1/2") Size Casing 1.5m

200-1406 PW (5.1/2") Size Casing 1m

1100-1330 PW Diamond Casing Shoe

203-1302 PW Casing Adaptor

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