Figure F7. Schematic of downhole OsmoSampler system. A. Outside view. B. Cross section view. C. Pump detail. System consists of (1) a ½ inch diameter stainless steel strength member up to 4 m long connected to (2) two shackle eyes and (3) a protective high-density polyethylene (HDPE) protective sleeve. The (4) osmotic pump pulls water through (4a) small-diameter tubing attached to an intake by the diffusion of water from the (4b) freshwater chamber through the (4c) osmotic membrane to the (4d) saturated salt chamber. Brine is expelled out the (4e) outflow. Fluid samples are drawn into and stored within a series of sample spools, comprising up to several kilometers of small-diameter tubing. Equilibration holes in the (6) HDPE sleeve allow ambient fluid to circulate around the OsmoSampler components. Three to six downhole OsmoSampler systems were deployed below each Expedition 301 CORK.
Previous | Close | Next | Top of page