A method for detecting lateral bores from a main wellbore of a well and measuring a distance from the surface to the lateral bore, the method whereby (a) providing a caliper tool into the main wellbore, the caliper tool having a tool body having a first end, a second end, and a plurality of calipers extending radially from the tool body; (b) moving the caliper tool axially through the main wellbore on a deployment member, the deployment member being connected to the first end of the tool body; (c) detecting an inner diameter surface of the main wellbore with the calipers by ascertaining the distance that each of the calipers extend from the tool body; (d) detecting a lateral opening in the main wellbore with at least one of the plurality of calipers, the lateral opening being an opening of a lateral bore branching off of the main wellbore; and (e) determining the distance from the surface of the earth to the lateral opening, wherein each of the plurality of calipers has a first segment having a radially-inner end with a fixed radial position with respect to the outer diameter of the tool body and a radially-outer end operable to move in a radial direction with respect to the outer diameter of the tool body; a second segment having an axially-movable radially-inner end with a fixed radial position with respect to the outer diameter of the tool body and a radially-outer end operable to move in a radial direction with respect to the outer diameter of the tool body; and a flexible joint coupling the radially-outer end of the first segment to the radially-outer end of the second segment such that the flexible joint is movable from a radially outward position to a radially inward position with respect to the outer diameter of the tool body in response to axial movement of the of the axially-movable radially-inner end of the second segment, the flexible joint defining a radially outermost portion of the respective caliper; the caliper tool whereby a biasing member operatively coupled to the flexible joint of each of the calipers to bias the flexible joint to the radially outward position; at least one sensor operatively coupled to the axially-movable radially-inner end of the second segment of each of the calipers, the at least one sensor operable to sense the axial position of the axially-movable radially-inner end of the second segment of each of the calipers relative to the tool body; a processor operably connected to the at least one sensor, the processor operable to calculate a radial extension distance of each of the plurality of calipers in response to a data signal received from each of the sensors characterized by: a steering arm operably connected to the second end of the tool body; and a connector operable to couple the first end of the tool body to an insertion member. (a) providing a caliper tool into the main wellbore, the caliper tool having a tool body having a first end, a second end, and a plurality of calipers extending radially from the tool body; (b) moving the caliper tool axially through the main wellbore on a deployment member, the deployment member being connected to the first end of the tool body; (c) detecting an inner diameter surface of the main wellbore with the calipers by ascertaining the distance that each of the calipers extend from the tool body; (d) detecting a lateral opening in the main wellbore with at least one of the plurality of calipers, the lateral opening being an opening of a lateral bore branching off of the main wellbore; and (e) determining the distance from the surface of the earth to the lateral opening, a second segment having an axially-movable radially-inner end with a fixed radial position with respect to the outer diameter of the tool body and a radially-outer end operable to move in a radial direction with respect to the outer diameter of the tool body; and a flexible joint coupling the radially-outer end of the first segment to the radially-outer end of the second segment such that the flexible joint is movable from a radially outward position to a radially inward position with respect to the outer diameter of the tool body in response to axial movement of the of the axially-movable radially-inner end of the second segment, the flexible joint defining a radially outermost portion of the respective caliper; the caliper tool whereby a biasing member operatively coupled to the flexible joint of each of the calipers to bias the flexible joint to the radially outward position; at least one sensor operatively coupled to the axially-movable radially-inner end of the second segment of each of the calipers, the at least one sensor operable to sense the axial position of the axially-movable radially-inner end of the second segment of each of the calipers relative to the tool body; a processor operably connected to the at least one sensor, the processor operable to calculate a radial extension distance of each of the plurality of calipers in response to a data signal received from each of the sensors characterized by: a steering arm operably connected to the second end of the tool body; and a connector operable to couple the first end of the tool body to an insertion member. a steering arm operably connected to the second end of the tool body; and a connector operable to couple the first end of the tool body to an insertion member.