We use cookies to improve your experience, some are essential for the operation of this site.

VSP team posing with the wall-lock well geophone.

VSP team posing with the wall-lock well geophone.
VSP team posing with the wall-lock well geophone.
VSP team posing with the wall-lock well geophone.
VSP team posing with the wall-lock well geophone.
Comments (0)
384359
Kleindinst, Thomas N.
VSP team posing with the wall-lock well geophone.
Still Image
06/28/2012
graphics/R_Stephens/_DSC6077.JPG
Left to right:
Steve Swift, Tom Bolmer, Hartley Hoskins, and Ralph Stephen.
Wall-lock well geophones are used to clamp vibration sensors into boreholes on the deep seafloor. They are deployed through the drill pipe from a drilling vessel into the hard-rock basement underlying the seafloor sediments. Typically vibrations are detected from a "shooting" ship that fires explosives (in the early days) and airguns. This wall-lock well geophone was deployed from the D/V Glomar Challenger in March 1977 south of Bermuda in the first off-shore Offset Vertical Seismic Profile (VSP). WHOI scientists carried out VSPs (with the source on the drill ship) and Offset VSPs from the D/V Glomar Challenger and D/V JOIDES Resolution from 1979 to 2002. VSPs and Offset VSPs are now routinely carried out in the offshore petroleum exploration industry.
Image Of The Day caption:
A recent, routine audit provided an opportunity for WHOI scientists to dig out some old equipment and reminisce about former successes. Here, Steve Swift, Tom Bolmer, Hartley Hoskins, and Ralph Stephen (left to right) hold a reunion around a wall-lock well geophone. Instruments like this clamp sensitive vibration sensors inside boreholes drilled deep into the seafloor. This particular geophone was deployed from the D/V Glomar Challenger in March 1977 south of Bermuda to conduct the first offshore offset vertical seismic profile (VSP) experiment to study the propagation of sound through Earth's crust. Today, VSPs and offset VSPs are routinely conducted by the offshore petroleum exploration industry.
Photo by Tom Kleindinst
© Woods Hole Oceanographic Institution
http://msg.whoi.edu/AGU_2003_VSP/AGU_2003_VSP_1.html
Labels
This item includes these files
Image
Image
Collections