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Project Acronym: GYGY | State: Completed | Expedition ID: 5011

ins.: 2009-04-13 02:00, 16 yrs ago
By: Scientists
Category: Elgygytgyn
Elgygytgyn

Elgygytgyn: 2009-04-13

The Switch to HQ Pipe -- Having reached the load ...
The larger PQ has an outer diameter of 95.5 mm and the smaller HQ has an outer diameter of 73 mm. The HQ pipe is shown here stacked on the pipe sloop near the drill rig.

The Switch to HQ Pipe -- Having reached the load capacity of the drill rig for use of the larger PQ pipe at a depth of 272m below lake floor, today we switched to using the smaller diameter HQ pipe. So now the PQ pipe acts like a casing for the HQ and drilling continues without the PQ weight on the derrick. The HQ is fit with an HQ3 bit on the end, an adapted hard rock core catcher, and a lexan (special plastic) liner so we can continue to recover sediments and drill into the anticipated breccia using the same tools.