公开(公告)号：US12078054B2

公开(公告)日：2024-09-03

申请号：US18599325

申请日：2024-03-08

申请人： CHINA UNIVERSITY OF PETROLEUM (EAST CHINA)

发明人： Bangtang Yin ,  Chi Zhang ,  Baojiang Sun ,  Zhiyuan Wang ,  Xuliang Zhang ,  Yonghai Gao ,  Xiaohui Sun ,  Wei Zhang

IPC分类号： E21B47/10

CPC分类号： E21B47/10 ,  E21B2200/20

摘要： An experimental device and method for co-existence of overflow and lost circulation in a fractured formation during drilling of a deviated well are provided. An inner cavity of an outer pipe is provided with an inner pipe to form a deviated casing. An upper side of the outer pipe is provided with a mixture outlet. A middle-lower side of the outer pipe is provided with a leakage port and two overflow ports. The gap width can be changed by adjusting a bolt and a support block to be compatible with different types of fracture models. A gas injection system includes an air compressor and a gas flowmeter. An upper port of a liquid injection system is connected to a joint arranged at upper ends of the inner pipe and outer pipe through a water pump, a liquid flowmeter and a liquid regulating valve.