Nc50 thread connection fatigue6/2/2023 Optionally, the connector has (a) wiring for transmitting power and/or data through the connector and (b) at least one seal disposed adjacent the wiring for protecting the wiring from contact with wellbore fluids. Certain other embodiments have less than all of these ratios and dimensions. Certain embodiments of the present invention include a pitch-to-root radius ratio that is less than that specified by the API, a thread height-to-root radius ratio that is less than that specified by the API, a flank angle that is less than that specified by the API, and a taper that is less than that specified by the API for said pre-determined outside diameter. The pin and box have threads with a pre-determined profile different from that specified by conventional (e.g., API) specification and provide improved strength characteristics. In a preferred embodiment, the threaded connector has a pin-box arrangement for joining two components. A connector for oilfield applications has high resistance against cyclical bending stress and fatigue failure.
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