Diameter-variable reamer bit

• Main Authors: YANG LU, DONG WENKUI, WANG JUNBANG, DONG BOYANG, SHINDO, SONG BAIQIANG, TAO ZHANSHENG, ZHANG JINLING, CHEN JUNXIA
• Format: Patent
• Language: Chinese; English
• Published: 07.11.2023
• 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 discloses a diameter-variable reamer bit which comprises an upper connector, a tool apron, a spline shaft, a supporting cone, a reaming blade wing, a connecting cylinder, a suspension connector, a compression spring, a ball seat and a conventional bit, one end of the upper connector is in threaded connection with one end of the tool apron, the interiors of the upper connector and the tool apron are hollow, and the spline shaft is installed in the tool apron. And the reaming cutter wing is clamped at the end of the cutter holder, the end of the spline shaft is fixedly connected with the suspension joint, the suspension joint is arranged in the connecting cylinder, and one side of the suspension joint abuts against the compression spring. According to the diameter-variable reamer bit, the reamer blades of different sizes are adopted, it is guaranteed that stress and cutting output of each blade are basically average, the service life of the reamer blades is prolonged, and due to the fact that