Patent ID: 9222315
Filing Date: 2015-12-29
Classification: E21B,F16L

Abstract:
1. A rotary lock block type drilling riser connector, comprising a main body connection part and control pipeline connection parts, wherein the main body connection part includes an upper joint having a flange, a lower joint having a flange, a driving ring provided between the flange of the upper joint and the flange of the lower joint, and a plurality of lock blocks, wherein each of the lock blocks are respectively disposed in fan-shaped grooves provided evenly along circumference of a lower end of the upper joint, the driving ring surrounds outer sides of all the lock blocks, and matching crimping circular grooves are arranged in outer circumferences of each lock block and the lower joint; wherein a screw hole is provided in the center of an upper surface of each lock block, T-shaped elongated slots facing downward are provided, and the screw holes of the lock blocks are slidably connected with the T-shaped elongated slots in radial directions by T-shaped screws; wherein the driving ring is fixedly connected with the flange of the upper joint upwardly through a positioning bolt, segments of horizontal T-shaped slots are evenly distributed along a circumference of an inner surface of the driving ring, each horizontal T-shaped slot is a variable radius curve slot, a radial dimension from the bottom of each horizontal T-shaped slot to an axis of the lower joint is set to gradually increase from one end to the other, another screw hole is provided in the center of an outer circumferential surface of each lock block, and the driving ring is slidably connected with the lock blocks in a circumferential direction by T-shaped screws.