This inventor holds 4 USPTO granted patents. Top assignees: Sichuan Xieming Technology Co, Ltd., Southwest Petroleum University, Nantong Xieming Technology Co., Ltd.. Active years: 2023-2025.
Company Filing History:
4 out of 8 
4 out of 344 
2 out of 3 Years Active: 2023-2025
Title: Innovations of Lanhui Mao in Oil Drilling Technology
Introduction
Lanhui Mao is a notable inventor based in Chengdu, China, recognized for his contributions to the field of oil drilling technology. With a total of four patents to his name, Mao has developed innovative solutions that enhance drilling efficiency and safety in the petroleum industry.
Latest Patents
One of Mao's latest inventions is the "Directional Well Hydraulic Clutch Drill String Full Rotation Controller." This technology is designed to improve the efficiency of directional drilling. It features a rotary assembly, a power assembly, and a control assembly, allowing for two working states: compound drilling and directional drilling. By adjusting the rotation speed of the upper drill string or the displacement of drilling fluid, the controller can effectively change its working state, facilitating directional drilling tasks. This invention is notable for its low cost and high safety and reliability. It minimizes friction in the drill string system, reduces stick-slip vibrations, and ultimately increases the rate of penetration (ROP).
Another significant patent is the "High-Frequency Composite Impactor." This device includes a high-frequency axial impact assembly and a torsional impact assembly. The axial impact assembly converts flowing drilling fluid into a pulsed jet, achieving high-frequency axial impacts. The torsional impact assembly enables torsional impacts through a shunt, resulting in a composite impact that effectively reduces stick-slip and jump drilling incidents. By decreasing friction between the drill string and the borehole wall, this impactor enhances drilling efficiency and increases ROP.
Career Highlights
Mao has worked with prominent institutions such as Southwest Petroleum University and Sichuan Xieming Technology Co., Ltd. His experience in these organizations has contributed to his expertise in drilling technologies and innovations.
Collaborations
Mao has collaborated with notable colleagues, including Jialin Tian and Lei Cha, who have contributed to his research and development efforts in the field.
Conclusion
Lanhui Mao's innovative patents and contributions to oil drilling technology demonstrate his significant impact on the petroleum industry. His work continues to enhance drilling efficiency and safety, making him a key figure in this field.