Patent ID: 7813220

Claim:
A seismic sensing system for monitoring seismic activity associated with a formation from a downhole location, said monitoring well seismic sensing system comprising: a tubular member having a central longitudinal axis and being operable to be inserted into a well; and at least one seismic sensing assembly mounted upon said tubular member, said at least one seismic sensing assembly including; first and second eccentric bearing members coupled to said tubular member, said first and second eccentric bearing members having; an eccentric bearing portion having a first exterior bearing surface operable to abut against an interior surface of the well, wherein a first bearing radial distance from the central longitudinal axis of said tubular member to a maximum eccentric point on the first exterior bearing surface is greater than a second bearing radial distance diametrically opposed to said first bearing radial distance and extending from the central longitudinal axis of said tubular member to a second exterior bearing surface; an eccentric seismic member connected to said tubular member in a position between and rotated one hundred and eighty degrees out of phase with said first and second eccentric bearing members, said eccentric seismic member having; an eccentric seismic sensing member coupled to an exterior portion of said eccentric seismic member and operable to abut against an interior surface of the well, wherein a first seismic radial distance from the central longitudinal axis of said tubular member to a maximum eccentric point on an eccentric seismic contact surface of said eccentric seismic sensing member is greater than a second seismic radial distance diametrically opposed to said first seismic radial distance and extending from the central longitudinal axis of the tubular member to an exterior seismic surface of eccentric seismic member and wherein the first bearing radial distance plus the first seismic radial distance is greater than the interior diameter of the surrounding well such that an opposing interference fit will exist to acoustically couple the eccentric seismic sensing member within the well and against an interior wall surface of the well.