Due to the high brightness of laser, some people wanted to use laser technology for drilling in the petroleum industry soon after the advent of laser technology. In the early 1970s, patent documents on laser drilling and perforating appeared in the United States, France, and the Netherlands. However, because the power of the laser at that time was only about several thousand watts, the wavelength of the laser was long and difficult to focus, and more importantly, the cost was probably high. Laser drilling had never been realized. In view of this, many people doubted the possibility of laser drilling. But since then, the A lot of research has been done on lasers, laser power, efficiency, and emission capabilities, and significant progress has been made. Modern high-power lasers can convert electrical energy, optical energy or thermal energy into light energy. The light energy is focused to form a strong laser beam that can crush, melt and evaporate rocks. The wavelength of the laser can be 0.1~103pm, and hydrogen fluoride (HF) and Fluoride atmosphere (DF) laser, chemical iodine oxide laser (coIL), cq laser, co laser, free electron laser (FEL), gold/ammonium aluminum garnet (Nd/YDG) laser and hydrogen fluoride (KrF) laser, their working Parameters such as wavelength, pulse length, and power can be used as lasers for drilling. These lasers transfer energy to the rock through reflection, scattering, blackbody radiation, plasma shielding, etc. In 1998 and 1999, many documents disclosed that the United States re-raised the issue of laser drilling. The United States GRI (GasRe-search Institute) proposed a two-year plan to invest US$600,000, jointly with the United States Air Force, the United States Army and the Colorado School of Mines. , MIT, Lakewood Corporation and Philips Petroleum Corporation are working together to explore the feasibility and cost of applying the laser technology used in Star Wars in the United States in the 1980s and 1990s for gas well drilling and completion in the oil industry. , benefits, and environmental impact, improving the competitiveness of U.S. industry. The United States has invested a lot in this research plan. The equipment invested includes the High-Energy Laser System Test Facility (HELsTF) at the White Sands Missile Test Range of the US Army and the Research Laboratory of the US Air Force. The laser to be used in the test has an energy of 10"w. The Mid-Infrared Advanced Chemical Laser (MIRAcL for short) and the Chemical Oxide Iodine Laser (coIL for short). These lasers were originally used for shipboard defense and air-to-air defense, and are known for their ability to penetrate tactics and strategies flying many miles away. The ability to target, track and destroy missiles indicates that it can be used to drill gas wells with a depth of 4572m. The characteristics of the coIL laser that can be combined with optical fiber, as well as high output power and low chemical price, make it suitable for long-distance energy transmission in gas well drilling. Engineering projects. The United States has also invested in two additional high-power lasers to study the interaction between laser beams and surrounding materials. One is a discharge axis laser, which is used to study the impact of laser beams on different materials in various environments. 15 An extensive database of years of research results provides a better understanding of the interaction between materials and lasers. Another is a laser demonstration facility used to determine the interaction of intense laser beams with different soft rock minerals. , the test cost is quite low, indicating that the interaction between rock and laser can be explored in large quantities, as well as the interaction between laser and rock under downhole conditions. The aforementioned evaluation laser drilling experiment conducted by Phillips Petroleum Company of the United States using the US military Ml RACL laser shows that laser The equivalent drilling speed of the beam can reach 50.60m/h, and by changing the direction of the MIRAcL laser light through the concave mirror to drill in the horizontal direction, the equivalent drilling speed can reach 137.16m/h; with laser perforation, the perforation depth can reach 6lm. Research on laser technology began as early as the 1960s, and tens of millions of dollars were spent to develop high-power lasers. Although it was not successful at the time, it accumulated rich experience. In 1998, the Chinese Academy of Sciences developed ultra-short pulse high-power lasers. Technological research has made great progress and won the first prize of the Chinese Academy of Sciences' Academic-level Invention Award, which laid the foundation for the application of laser technology in oil drilling.