2results about How to "Delayed buckling" patented technology

The utility model discloses a kind of composite material compression test fixtures of synchronous pressure application, including chassis and clamping block;Chassis includes bottom plate that can be installed on test table and the back plate and two side plates connected with bottom plate;Two pairs of clamping block are symmetrically arranged, and each pair of clamping block is symmetrically arranged;The upper and lower clamping block of one side is slidably installed on the same movable plate by first vertical guide structure, movable plate side portion is slidably installed on back plate by horizontal guide structure, movable plate is installed with clamping power component in the side away from clamping block, clamping power component is towards one side side plate, clamping power component is used to resist on side plate and promote the clamping of clamping block in the side;The upper and lower clamping block of the other side is slidably installed on the same fixed plate by second vertical guide structure, and fixed plate is installed on the other side plate;Clamping block is close to the end of effective test area and is equipped with extension and arc chamfer.This fixture can slow down the stress concentration of clamping block end in sample effective test area, and left and right clamping block load distribution is uniform.

The invention discloses a coiled tubing reaction torque reduction tool, system and method. The tool comprises a shell, an underground hydraulic control circuit, a hydraulic assembly, a clutch plate set, a clutch plate sleeve and a continuous oil pipe connector. The underground hydraulic control circuit is used for receiving a first electric signal instruction and controlling the hydraulic assembly to push and press the clutch disc set so that quantitative friction torque can be generated between clutch discs and transmitted to the continuous oil pipe connector. Or a second electric signal instruction is received, and the hydraulic assembly is controlled to release the clutch disc set so that the clutch discs can be in the loose state. The system comprises a coiled tubing reaction torque reduction tool, an upper computer, a coiled tubing and a drill bit. The upper computer is used for sending an electric signal instruction to the underground hydraulic control circuit and controlling whether reaction torque generated by the drill bit is transmitted to the coiled tubing or not. According to the tool, system and method, the damage probability of the coiled tubing can be greatly reduced, and the service life of the coiled tubing is prolonged.