Nanjing Dilong No-Dig Engineering Co., Ltd., member of International Society for Trenchless Technology (ISTT) and China Society for Trenchless Technology (CSTT), started the application research of trenchless/no-dig technology in 1996 and got registered in 1998, one of the earliest specialized companies in no-dig technology development and construction in China.



With the total assets up to more than 40, 000, 000 RMB, DL is equipped with 20 sets of various-sized directional drilling machines and technical staff of 300 persons. The new manufactory located in Nanjing Lishui economic and technical development district covers more than 20000 square meters and come into use since June 2007. The new manufactory contains component produce line, drill machine assembling line. We can produce 300 pieces of HDD machine per year. The loading test system can simulate the real construction environment so that each drill machine can be tested before they leave the factory and are promised of excellent performance and reliable quality. After ten years development, Nanjing DL has two main parts: 1 the producing of series HDD machine; 2 the pipeline installation with no-dig technology through the whole country.



We have these experimental machine used in our construction team. After long-term experiment and improvement, our machine is qualified to go into the market. Since 2002 we sold our machine throughout the country. According to the development of the market and clients' demand, our designation and research team goes further and further. Till now we have three series of HDD machine: DL series machine, DF series machine which includes the most advanced mini HDD machine ----DFM1504and DDL series.



In order to provide timely and efficient service for customers, our company set up two new branches in Guangzhou and Tianjin in2009. At present, the branch has worked well, covering the main country.



Adhering to Excellent technology, high-quality services , DL think for the customers.