JA Daily Science Report for Expedition 309, 22 August 2005


LOCATION: Site 1256


SCIENCE UPDATE: The triple combo was lowered to 1225.6 below which a tight spot was encountered and the tool could not pass. The hole was logged up to 554.6 mbsf then the triple combo was run back to 944.6 mbsf. The hole was logged up to 844.6 mbsf after which the tool was recovered and preparations were made to deploy the FMS.


The FMS was unable to pass at 1222.6 mbsf due to the same tight spot encountered by the triple combo. The hole was logged up to 654.6 mbsf at which point the calipers failed to close and the tool could not be lowered for a second pass. The tool was delicately extricated from the open hole, with 700 lbs of overpull, into the pipe. The calipers continued to read open over the ~4000 m trip within the drill pipe. The FMS caliper measurements were in very close agreement with the 4 1/8 inch predicted pipe ID. As expected, the FMS calipers sprung open when it exited the drill pipe and the FMS was returned intact.


The UBI was then successfully deployed.