Directional well technology is one of the most advanced drilling technologies in the field of petroleum exploration and development in the world today. It is a drilling process in which special downhole tools, measuring instruments and process technologies are used to effectively control the wellbore trajectory, so that the drill bit can reach the predetermined underground target along a specific direction. technology. The use of directional well technology can economically and effectively develop oil and gas resources with limited surface and underground conditions, can greatly increase oil and gas production and reduce drilling costs, is conducive to protecting the natural environment, and has significant economic and social benefits. Directional well is a drilling method that allows the wellbore to reach the target layer along the pre-designed inclination and azimuth.

There are three main types of sections:
(1) Two-stage type: vertical section + build-up section;
(2) Three-stage type: vertical section + build-up section + stabilization section;
(3) Five-section type: upper vertical section + build-up section + stable slope section + descending slope section + lower vertical section.