Nitrogen well-drilling method in well-drilling field

Abstract

The invention discloses a nitrogen well-drilling method in the well-drilling field. The nitrogen well-drilling method comprises: (a) air enters into a membrane separation nitrogen making machine (2) after being compressed through an air compressor (1); (b) the compressed air is separated through the membrane separation nitrogen making machine (2), and nitrogen which is more than 95% in purity is obtained and enters into a supercharger (3); (c) the nitrogen which is compressed and separated is further supercharged through the supercharger (3) and then enters into a manifold system; (d) the nitrogen entering into the manifold system passes through a rotary blowout preventer (5) and then is injected under a well; and (e) the nitrogen enables drilling cuttings under the well to be brought onto the ground, the drilling cuttings pass through a rock discharging pipe (12) and then enter into a ground recovery pond, and the whole process is finished. By means of the nitrogen well-drilling method in the well-drilling field, nitrogen well-drilling can be achieved successively, new development is brought to petroleum and natural gas extraction of China, and meanwhile, continuous development of gas well-drilling equipment of China is also prompted.

Description

technical field [0001] The invention relates to a nitrogen drilling method in the drilling field. Background technique [0002] Gas drilling is an underbalanced drilling technology that uses gas as the main circulating fluid. In the 1930s, the United States began to study gas drilling technology. However, due to the technical level, equipment and understanding at that time, it has not been applied on a large scale. Until the 1960s, with the advent of air drilling motors and the continuous improvement of various equipment, gas drilling technology has received people's attention again. [0003] Gas drilling (according to the use of different circulating media) can generally be divided into different types: air drilling, nitrogen drilling, natural gas drilling, exhaust gas drilling, etc. Among them, air drilling is unique because of its cheapness, infinity and easy availability. It has incomparable advantages in the form of gas drilling. However, for air drilling, since the...

AI Technical Summary

Problems solved by technology

[0008] Although some oil and gas fields in my country have adopted nitrogen drilling to exploit oil and gas wells and achieved some achievements, compared with foreign countries, the gap between nitrogen drilling in my country is still relatively large, which is not only reflected in the matching and development level of technical equipment , which is also reflected in the process method and basic theory research, and has not yet started in the multi-process integrated technology

Images