While-drilling reversing device

• Main Authors: WANG DENGBO, QIN XI, WU DONGSHENG, ZHOU XUCHENG, ZHANG BIN, ZHANG YONG, ZHANG YAOXIAN, QIN XINDE
• Format: Patent
• Language: Chinese; English
• Published: 21.02.2020
• Subjects: EARTH DRILLING; EARTH DRILLING, e.g. DEEP DRILLING; FIXED CONSTRUCTIONS; MINING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR ASLURRY OF MINERALS FROM WELLS

The utility model relates to the technical field of drilling operation equipment. The device is a while-drilling reversing device. The device comprises an inverted pup joint, a leaking stoppage pup joint, a spring, a piston and an inverted part, the lower portion of the leaking stoppage pup joint is fixedly connected with the upper portion of the inverted pup joint through threads, the upper portion of the leaking stoppage pup joint is provided with an internally and externally communicated bypass hole, and the piston is arranged on the inner side of the upper portion of the inverted pup jointand comprises a piston mandrel and a piston head; a spline is arranged on the outer side of the lower portion of the piston mandrel, and the piston mandrel is connected with the inner side of the lower portion of the plugging nipple and the inner side of the upper portion of the reversing nipple through splines. A spring arranged in the vertical direction is mounted on the inner side of the back-off pup joint correspondi