Patent ID: 7661308

Claim:
An apparatus for detecting fluids, if they exist, in a well, comprising: an interface tool comprising an interface sensor assembly and a base assembly; the interface sensor assembly further comprising a sensor assembly and a sensor stand, the sensor stand adapted to support the sensor assembly and guide the sensor assembly in and out of the well, the sensor assembly adapted to be placed into the well; the sensor assembly having a fixed, first electrical contact, and a movable float having coupled thereto a second electrical contact in the form of a ground rod the float adapted to rise as fluid surrounds the float causing the ground rod to make physical contact with the first electrical contact when the float floats to a predetermined level; the base of the sensor assembly being equipped with a plurality of legs, the legs being spring loaded so as to force the legs to push outward and against the inner casing of the well, the legs having electrically conductive rollers at the end of the legs, the rollers being semi-rigidly biased so as to exert pressure against the interior diameter of the inner casing of the well, the rollers being in electrical and physical contact with the inner casing of the well when the sensor assembly is placed down the well, the rollers further being electrically coupled to the ground rod; a single conductor, multistrand cable mechanically coupling the sensor assembly to the base assembly; the base assembly further comprising a cable spool, the spool mounted on a frame within the base assembly, the unwinding and winding of the single conductor, multistrand cable from the spool operably lowering and raising, respectively, the sensor assembly into and out of the well, and a cable counter being positioned on an arm coupled to the base assembly and being adapted to measure the length of cable as it is lowered into the well; a power source having a positive terminal and a negative terminal, the negative terminal coupled to ground; the single conductor, multistrand cable being wound around the axle of the spool to a commonly available armature system with brushes, the armature system being connected to the positive terminal of the power source; and an alarm switchably, electrically coupled in a circuit formed by the power source, the armature system, the single conductor, multistrand cable, first electrical contact, ground rod, rollers and ground, the alarm adapted to activate when electrical contact is made between the first electrical contact and the ground rod, either through direct physical contact or indirectly via an electrically conductive fluid such as brine.