Drilling fluid is an important knowledge in drilling engineering

Drilling fluid is an important part of drilling engineering. Only by considering the overall situation of drilling system engineering can we ensure the effective performance of drilling fluid fully reflect the role of "drilling blood". Due to the fact that drilling fluid is the key to rapid drilling reservoir protection, the design maintenance of drilling fluid should always focus on the goals of rapid drilling reservoir protection, while also considering environmental protection requirements. Usually, the reduction of downhole complexity, the increasing use of vibrating screens, the decreasing use of diluents viscosity reducers, the decreasing content of bentonite are important signs of progress in water-based drilling fluid technology.

Although the progress of drilling engineering technology has promoted the development of drilling fluid technology, the progress development of drilling fluid technology are more dependent on the needs of drilling the emergence of new treatment agents. In terms of drilling fluid technology in China, it has gradually matured with the development of the petroleum industry. In the 1950s, the use of calcium treated drilling fluids marked the beginning of the development of drilling fluids in China. Drilling mud additives

Since the Second National Mud Conference in 1975, especially the National Oilfield Chemistry Conference held by the former Ministry of Petroleum Industry in 1977, the development application of drilling fluid treatment agents have gradually received attention. After the second oil field chemical technology exchange meeting of the former Ministry of Petroleum Industry in 1985, drilling fluid treatment agents began to develop rapidly, the initial introduction of foreign majors to the independent research development of specialized drilling fluid treatment agents, thereby promoting the progress of drilling fluid technology.

Since the systematic research application of drilling fluids treatment agents in China in the 1970s, it has gone through more than 40 years. Over the past 40 years, drilling fluids treatment agents have undergone continuous progress improvement, their development is closely related to the development of petroleum exploration drilling engineering. Each progress is built on the premise of necessity is a process of continuously improving understanding of drilling fluid performance. In the past 40 years, the control level of bentonite content has been the fundamental indicator in the development process of drilling fluid dispersed (coarse fine dispersion) to non dispersed, then to low clay even non clay phases. Drilling fluid has gradually moved towards disciplinary treatment the initial "opening mountains bridging bridges when encountering water".

In terms of overall level, due to differences in management models understanding between China foreign countries, it is difficult to accurately compare. However, it can be confirmed that the domestic drilling fluid technology level, especially the research level of drilling fluid treatment agents, ranks first internationally. Due to different habits (control of bentonite content), varying degrees of complexity (fresh water, saline water, high temperature, high pressure), local materials (differences in raw materials), the technical level of drilling fluid varies in different regions of China, but it can meet the drilling needs under different geological conditions develop towards an effective, green environmentally friendly direction.