WELL SEISMIC TOOL Russian patent published in 2012 - IPC G01V1/40 

FIELD: physics.

SUBSTANCE: well seismic tool has a sealed housing and a controlled clamping device in form of a clamp lever. A removable shoe in form of a sector of a thin-walled pipe whose outer radius is greater than the radius of the housing is rigidly mounted on the housing, on the side opposite the lever and coaxially with the housing, or two shoes are mounted on different sides of the clamp lever.

EFFECT: more reliable contact with the medium and high quality of material recorded on horizontal components of seismic records.