US Patent 7513537 Tubular connection with slotted threads

A connection for the quick and functionally reliable connection of tubulars including pipes and casing. The connection having a male or pin end and a mating female, box, or socket end and sections of circumferentially and axially extending protuberances such as thread segments or lugs interrupted by slots extending circumferentially and axially approximately the same distance as the corresponding protuberance section. Both the pin and box have matching or corresponding arrays of interrupted threads and slots. When properly aligned, the array will be accepted by a corresponding slot when mating the pin and box. After proper mating, the connection is secured by rotating the pin or box to further mate the corresponding patches of the pin and box.