|Title||Developing a hot-water drill system for the WISSARD project: 3. Instrumentation and control systems|
|Author(s)||Justin Burnett , Frank R Rack, Daren S Blythe, Pat Swanson, Dennis V Duling, Dar E Gibson, Chad Carpenter, Graham Roberts, Jeff Lemery, Steve Fischbein, Adam Melby|
Annals of Glaciology
The WISSARD (Whillans Ice Stream Subglacial Access Research Drilling) traversable hot-water drill system was designed to create various-diameter ice boreholes to a depth of >800 m, with most major components being controllable from a single user interface. The drill control system operates four low-pressure pumps for water generation and circulation, two hot-water generation units containing a total of six diesel burner modules with integrated high-pressure pumps, three winches (one with independent level-wind motor), a four-motor linear traction drive, and a large number of analog and digital sensors to monitor system performance and cleanliness. Due to development time constraints the control system design focused on utilizing commercial off-the-shelf components, while being highly modular, easily expandable and rapidly deployable. Additional emphasis was placed on providing redundant manual operator controls and maintaining a low degree of system automation to avoid dependence on software control loops for first-season deployment. The result of this design paradigm was a control system that was taken from concept to full operation in <6 months, successfully performing in the field without insurmountable problems.
|Special Collections||International Workshop on Ice Drilling Technology Series, 7th International Workshop on Ice Drilling Technology|
|Categories||Hot Water Drilling, Subglacial Access|
|Equipment||WISSARD Hot Water Drill|
|Citation||Justin Burnett , Frank R Rack, Daren S Blythe, Pat Swanson, Dennis V Duling, Dar E Gibson, Chad Carpenter, Graham Roberts, Jeff Lemery, Steve Fischbein, Adam Melby ( 2014 ) Developing a hot-water drill system for the WISSARD project: 3. Instrumentation and control systems. Annals of Glaciology , 55 , 68 , 303-310 . doi: 10.3189/2014AoG68A039|