Drilling-and-plugging-free well fixing method and tool

• Main Authors: DAI SHAOQIANG, LI JIANGTAO, LIU YONGCHUN, CAO PEIJUN, FENG YONGSHENG, XU QINGHUA, SUI YONGFENG, XUE XUECHAO
• Format: Patent
• Language: Chinese; English
• Published: 09.06.2010
• 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 relates to a drilling-and-plugging-free well fixing operation method in the well completion process of an oil well, a gas well and a water well, in particular to drilling-and-plugging-free well fixing tool. The drilling-and-plugging-free well fixing tool mainly comprises a drilling-and-plugging-free seal grading hoop and a salvageable rubber plug, wherein the drilling-and-plugging-free seal grading hoop comprises an upper joint, a cement injecting cylinder, a switch slide sleeve, a closed spring, a center pipe, a lower joint and a sleeve pipe outer packer; and the salvageable rubber plug comprises a rubber plug ring, a salvageable head, a connecting center pipe and a connection locking jaw. The drilling-and-plugging-free well fixing method is realized by adopting the drilling-and-plugging-free seal grading hoop and the salvageable rubber plug. The tool and the method can realize drilling-and-plugging-free well fixation and overcome the defects of the conventional grading well fixing technology,