This simple but rugged core barrel is popular in site investigations. The tubulars are thicker than the equivalent metric series (T2 or T6) core barrels and thus less prone to damage when handling on site. However, the larger kerf area results in a relatively lower rate of penetration.
The triple tube system is made up by adding a third tube to the standard wireline core barrel. This third tube is made of stainless steel, split lengthwise and nested inside the inner tube.
Coring with the W/L3 core barrel proceeds in the same way as the standard wireline type. However, after the inner tube is retrieved with the overshot, the corelifter case is removed and the split tube is hydraulically pumped out from the inner tube. The upper half of the split tube is carefully lifted off, revealing the core in a virtually undisturbed condition for transfer to the core box.
These core barrels are available in industry standard hole sizes B, N, H and P. All parts are fully interchangeable with most other manufacturers’ triple tube wireline core barrels. Special requirements can also be met on request.
Features of the W/L wireline system include:
Fast descent inner tube assembly
“Knuckle Head” pivoting spearhead
Optional Landing Indicator
[table caption=”Triple Tube W/L3 Core Barrel” width=”600″ colwidth=”120|120|120|120″ colalign=”center|center|center|center|center”]
Size Designation,Hole Diameter(mm),Core Diameter(mm)