A tubular string comprises a plurality of torque connectors connecting a plurality of tubular members. At least one torque connector of the plurality of torque connectors comprises a pin component threadably connected to the box component. The pin comprises a three torque shoulders corresponding to three surfaces of the box component. In at least one embodiment, a sacrificial material is deposited between one of the torque shoulders and one of the surfaces to provide additional torque capacity to the torque connector. Additional apparatus, methods, and systems are disclosed.

An Internet of Thing (IoT) device includes a head portion; an elongated stress sensor coupled to the head portion, the stress sensor coupled to a surface; a processor coupled to the stress sensor; and a wireless transceiver coupled to the processor.

A load sensing assembly for a spinal implant includes a set screw having a central opening that extends from a first end of the set screw toward a second end of the set screw. The second end of the set screw is configured to engage with an anchoring member. The load sensing assembly includes an antenna, an integrated circuit in communication with the antenna, where the integrated circuit is positioned within the central opening of the set screw, and a strain gauge in connection with the integrated circuit. The strain gauge is located within the central opening of the set screw in proximity to the second end of the set screw.

A trunnion bolt monitoring system for an air preheater trunnion has a plurality of trunnion bolts through which extends a respective blind bore each in gas tight connection at its open end to a pressurized manifold comprising piping and T-fittings. Depressurisation of the manifold indicative of fatigue cracking of any one bolt is detected by electrical monitoring of three pressure sensors.

A hoist ring assembly and related methods of lifting a load wherein the hoist ring assembly includes a bolt for securing the hoist ring assembly to the load and the bolt includes a tensile stress indicator for showing the tensile stress on the bolt when the bolt is tightened onto the load. The hoist ring assembly can further include a radio-frequency identification tag used for communicating information relating to the hoist ring assembly. The methods include using the tensile stress indicator to achieve and maintain a predetermined preload of the bolt, and using the radio-frequency identification tag to obtain historical recorded information relating to the hoist ring assembly.

An Internet of Thing (loT) device includes a head portion; an elongated stress sensor coupled to the head portion, the stress sensor coupled to a surface; a processor coupled to the stress sensor; and a wireless transceiver coupled to the processor.

An attraction system includes a first component, a second component, a fastener configured to couple the first component to the second component, a radio frequency identification (RFID) tag including a torque stripe extending between the fastener and a reference point of the attraction system, wherein the RFID tag is configured to emit a radio frequency (RF) signal in response to the torque stripe being unbroken, and an RFID reader configured to detect the RF signal.

An intelligent bolt includes a head region and a threaded region. The head region includes a bolt cavity. A distance between the head region and a bottom end of the cavity changes in operation as a function of longitudinal stress applied between the threaded region and the head region, and the bolt includes a sensor arrangement for measuring changes in the distance. A distal end of the sensor arrangement is disposed adjacent to the bottom end, wherein changes in spatial position of the bottom end relative to the distal end occur as a function of changes in the stress applied to the bolt to define a gap G whose size varies depending upon the stress. Interrogating radiation transmission in operation via the gap G from a source to a corresponding radiation sensor of the arrangement generates a stress measurement signal that is processed for wireless communication.

The threaded fastener has a head end, a far end and a hollow core between the head end and the far end. A reference rod is mounted inside the hollow core. The reference rod has an anchor end attached to the far end of the threaded fastener and a free end extending in the head end. A flexible contact element is attached to the free end of the reference rod and is movable in the head end of the threaded fastener along a displacement path upon elongation and relaxation of the threaded fastener. Switch elements are mounted in the head end of the threaded fastener along the aforesaid displacement path of the flexible contact element. The switch elements are making calibrated contact with the flexible contact element upon a movement of the flexible contact element during a movement of the flexible contact element along its displacement path.

A problem is to provide a fastening screw with which an axial tension generated in a screw at a time of fastening is easily grasped, and the axial tension of the screw after fastening can be easily managed, even in a screw with a large diameter and a long length. The fastening screw includes a bore provided in a cylindrical portion through a head portion along an extending direction of the cylindrical portion, and a rod body that is inserted into the bore, has one end fixed to a bottom surface of the bore, and has an upper end protruded from the head portion. A protruded amount of the rod body from the head portion corresponds to an extension amount of the cylindrical portion at a time of generation of a predetermined axial tension.