The invention belongs to the field of
petroleum and
natural gas resource development, particularly relates to a multifunctional integrated multilateral well service tool, and aims to solve the problems of complex operation and low timeliness of the whole process. The tubular column comprises an inner tubular column body and an outer tubular column body which are connected together. The inner tubular column comprises an
upper joint, a runner sleeve, a drawing sleeve, an upper connecting sleeve, a lower connecting sleeve, a rotating shaft sleeve, a tubular column reducing sleeve, an inner central tube, a pressure isolation sleeve, a sealing
insertion tube, an extension tube and a central tube ball seat; the outer tubular column is used for being connected with the outer tubular column function module. Modular and
universal design is adopted, connectors can be reserved for connecting well completion tools such as hangers and packers of different types and different purposes, feeding, setting and hydraulic back-off double-releasing functions are provided for the tools, the universality of the tools is improved, the modular and
universal design is achieved, meanwhile, the structural optimization design is adopted, and the construction cost is reduced. The service tool
assembly is integrated with a press-down rotating jam releasing function and a circulating jam releasing function, so that the tool
tripping-in reliability is enhanced.