Multifunctional combined tool for underwater wellhead shaft accessories

• Main Authors: WEI HONGSHU, HUANG XIAOLONG, ZHANG XINGXING, LI JIAN, ZHAO WEIQING, SUN ZIGANG, GUAN QINGTAO
• Format: Patent
• Language: Chinese; English
• Published: 22.01.2019
• 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 invention discloses a multifunctional combined tool for underwater wellhead shaft accessories. The multifunctional combined tool for underwater wellhead shaft accessories comprises a general joint, a plurality of external joints and a plurality of internal joints; the general joint comprises a barrel body arranged vertically and a lower limiting ring; a neck portion is arranged on the barrel body; the external joint sleeves the neck portion and is supported by the lower limiting ring; the internal joint is connected to the inner side of the neck portion; and a combination of the general joint, the external joint and the internal joint form a service tool for mounting or recycling shaft accessories. By the technical scheme, multiple operations are finished by the general joint, multiplefunctions of feeding the accessories into a recycling shaft to protect bushes and resisting wear and reinforcing cores, carrying out pressure testing operation, flushing the shaft, recycling a sealing assembly, milling a cas