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ins.: 2014-05-29 02:00; ( Age: 10 yrs )
By: Scientists
Category: COSC1

COSC: 2014-05-29

The logging was finished Wednesday, without measuring the drill hole ...
With core run 246, the COSC-1 drilling reached 800 m depth.

The logging was finished Wednesday, without measuring the drill hole with an orientation tool - the probe did unfortunately not work. Today, the drill pipe was tripped back into the hole, and another relative deviation measurement conducted in the drill string, with a tool from the drilling company: About 25 m at 700 m depth. After mud mixing, core drilling continued at about 9 o’clock and during the day we got more than 30 m of drill core, reaching 800 m depth at 23:00 (starting from 767 m). The drill core is still top quality, 100 % core recovery from the very beginning of the drilling, and beautiful - marbles, gneisses, ductile deformation with folds etc. cut out by the drill in 3 dimensions. During the day we were able to replace the OLGA degasser’s motor, with help of the technical and drilling team - they were warming the shaft with a 600°C heat gun while battering it off with a sledge hammer. Thing can’t get more useless than useless, the situation could only improve. Tomorrow, Johan, the on-site engineer, will connect it and OLGA will be running again! Presently, the mood is high and we hope it will continue in such a way for some time.