Method and apparatus for cancellation of unwanted signals in...

Method and apparatus for creating seismic waves in a borehole

Method and apparatus for creating seismic waves in the earth

Method and apparatus for cross-well seismic surveying

Method and apparatus for deploying a plurality of seismic...

Method and apparatus for determining the profile of a subterrane

Method and apparatus for detonation of distributed charges

Method and apparatus for detonation of distributed charges

Method and apparatus for detonation of distributed charges

Method and apparatus for forcing a member through material such

Method and apparatus for generating a long sequence of seismic p

Method and apparatus for generating pressure waves in water by i

Method and apparatus for generating seismic energy in transition

Method and apparatus for generating seismic impulses using high

Method and apparatus for generating seismic waves

Method and apparatus for generating seismic waves

Method and apparatus for generating seismic waves

Method and apparatus for generation of acoustic energy

Method and apparatus for imparting a seismic pulse to the earth

Method and apparatus for inspecting well bore casing