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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.

Wireline Core Barrel Assembly

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 HWL Inner Tube Stabilizer
200-1401 HWL (4 1/2") Size Casing 3m
200-1402 HWL (4 1/2") Size Casing 1.5m
200-1406 HWL (4 1/2") Size Casing 1m
1100-1403 HWL Diamond Casing Shoe
203-1402 HWL 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 PWL Inner Tube Stabilizer
200-1320 PWL (5.1/2") Size Casing 3m
200-1321 PWL (5.1/2") Size Casing 1.5m
200-1406 PWL (5.1/2") Size Casing 1m
1100-1330 PWL Diamond Casing Shoe
203-1302 PWL Casing Adaptor

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