Figure 16: In the Wireline Re-entry System a borehole sonde, data recording package and control vehicle are suspended from a conventional research vessel on co-axial or fibre-optic cable (left). The control vehicle, navigated within a network of acoustic transponders, is used to guide the sonde into the borehole. The sonde is lowered into the borehole until the data recording package lands in the re-entry cone (right). When the seafloor and subseafloor systems are operating properly the control vehicle is disconnected from the data recoding package and is recovered back onboard the ship. The borehole system acquires data autonomously for up to a year until the system is recovered by grappling. [Spiess et al., 1992]


Retun to the 2003 Fall AGU Poster

THIRD PARTY BOREHOLE SEISMIC EXPERIMENTS DURING THE OCEAN DRILLING PROGRAM

Created on December 10, 2003 by Tom Bolmer