Nitrogen foam bridge plug drilling and grinding method for coiled tubing of low-pressure horizontal well

The invention discloses a low-pressure horizontal well continuous pipe nitrogen foam drilling and grinding bridge plug method, and relates to the technical field of oil and gas field development, and the method comprises the following steps: S1, compiling a construction design, completing preparation and installation of a wellhead device before construction, and carrying out sealing performance and function testing after installation is completed; s2, reasonable layout of construction equipment is carried out according to construction site conditions and safety operation requirements, placing positions of a pump truck, a nitrogen foam generating device and a ground process are selected, and connection and testing are carried out strictly according to construction standards; s3, a tubular column and drilling and grinding tools for the continuous pipe nitrogen foam drilling and grinding bridge plug technology are selected, assembling is completed, performance testing of all the tools is completed, and all the t