A wellbore caliper includes an actuator housing pivotally connected at one end to a well logging instrument housing and an actuator disposed in the housing and operable to extend and retract laterally extensible measuring arms.

A tangential force sensor is used instead of a coaxial strain gauge to measure the torque required to produce the rotation of a part. The force sensor is coupled tangentially to the rotating part through a non-slip contact produced by a force applied radially on the part. A progressively increasing tangential force produced by translating the force sensor in a direction normal to the axis of rotation of the part is then applied to initiate and maintain its rotation. The radial force applied to the part is judiciously selected and measured such that the part is engaged with enough friction to ensure a non-slip condition. By measuring the tangential force applied to the part, the torque characteristics of the rotatable part are determined. By sensing and controlling the radial force applied to the part, damage to the part or the mechanism supporting it is avoided.

A workstation for measuring dimensions includes an operator zone, a first fixture, a second fixture, a component delivery device, a gauge, and a collaborative robot. The second fixture is accessible to an operator in the operator zone. A component delivery device deposits a first component onto the first fixture. The envelope of the component delivery device is not accessible by the operator in the operator zone. The collaborative robot supports the gauge tool and has a range of motion capable of measuring the first component on the first fixture and a second component on the second fixture. A control module is in communication with the gauge and the collaborative robot and operates the collaborative robot to measure the first component on the first fixture and the second component on the second fixture.

A workstation for measuring dimensions includes an operator zone, a first fixture, a second fixture, a component delivery device, a gauge, and a collaborative robot. The second fixture is accessible to an operator in the operator zone. A component delivery device deposits a first component onto the first fixture. The envelope of the component delivery device is not accessible by the operator in the operator zone. The collaborative robot supports the gauge tool and has a range of motion capable of measuring the first component on the first fixture and a second component on the second fixture. A control module is in communication with the gauge and the collaborative robot and operates the collaborative robot to measure the first component on the first fixture and the second component on the second fixture.

A sensor is placed on a plate lowered into the hollow of the shaft and guided by taut wires between a lower attachment device and an upper motorized winder. The deformations, responsible for measurement errors and caused either by static deformations, produced by the weight or poor construction of the apparatus, or by vibrations, are to a large extent eliminated.

A sensor is placed on a plate lowered into the hollow of the shaft and guided by taut wires between a lower attachment device and an upper motorized winder. The deformations, responsible for measurement errors and caused either by static deformations, produced by the weight or poor construction of the apparatus, or by vibrations, are to a large extent eliminated.

A system and method for measuring an inside diameter of a pipe to determine if it exceeds a predetermined value using a plurality of fingers operatively connected to a spring. When in a fully extended position, the distance between opposite fingers is the predetermined value. The fingers are pivotable between a starting position, through the fully extended position, and to a failing position. In the starting position, an outer end of each finger engages an inside surface of the pipe to compress the spring. If the diameter exceeds the predetermined value as the system moves through the pipe, the pipe inside surface will no longer engage the fingers, which releases the spring causing the fingers to pivot to the failing position, where they remain until the system is removed from the pipe and manually reset.

A system and method for measuring an inside diameter of a pipe to determine if it exceeds a predetermined value using a plurality of fingers operatively connected to a spring. When in a fully extended position, the distance between opposite fingers is the predetermined value. The fingers are pivotable between a starting position, through the fully extended position, and to a failing position. In the starting position, an outer end of each finger engages an inside surface of the pipe to compress the spring. If the diameter exceeds the predetermined value as the system moves through the pipe, the pipe inside surface will no longer engage the fingers, which releases the spring causing the fingers to pivot to the failing position, where they remain until the system is removed from the pipe and manually reset.

There is provided an inside-diameter measuring unit capable of automating inside-diameter measurement and a control method for automatic inside-diameter measurement. An inside-diameter measuring part is supported by a support frame part via a floating joint part. The floating joint part includes a rotation-allowing mechanism part and a translation-allowing mechanism part. A measuring head part of the inside-diameter measuring part is inserted into a hole by a robot arm part. The inside-diameter measuring part adjusts its position and posture autonomously by the reaction force when a contact point pushes against the inner wall of the hole to align the axis of the inside-diameter measuring part with the axis of the hole. An electric inside-diameter measuring unit can automatically measure the inside diameter of a hole.

There is provided an inside-diameter measuring unit capable of automating inside-diameter measurement and a control method for automatic inside-diameter measurement. An inside-diameter measuring part is supported by a support frame part via a floating joint part. The floating joint part includes a rotation-allowing mechanism part and a translation-allowing mechanism part. A measuring head part of the inside-diameter measuring part is inserted into a hole by a robot arm part. The inside-diameter measuring part adjusts its position and posture autonomously by the reaction force when a contact point pushes against the inner wall of the hole to align the axis of the inside-diameter measuring part with the axis of the hole. An electric inside-diameter measuring unit can automatically measure the inside diameter of a hole.