In 2019, the system solution was successfully applied in the shale oil fracturing project of PetroChina Bohai Drilling Cangzhou block. The main advantages of this solution system are simple layout and reliable sealing, which solves the operational problems such as complicated connections and large land occupation in traditional wellsite fracturing operations; the innovative use of universal joints brings great convenience to the adjustment of installation distance. Plug valves and hydraulic gate valves used in high and low pressure manifolds can choose to use electric drive devices to save manpower, ensure the safety of construction personnel, and improve operating efficiency.

<span style="word-break: break-word;">In 2019, Douson delivered two sets of large-diameter universal connection fracturing manifolds (main diameter 130mm, maximum pressure 105MPa) to PetroChina’s western drilling wells. Drilling down the Xinjiang fracturing project. Since then, this program has been successfully applied in Xinjiang for the first time. </span>

In 2020, relying on the reliability and stability of the large-diameter universal connection fracturing manifold system, PetroChina Bohai Drilling once again chose to apply this solution to the Sichuan shale gas fracturing project (diameter 180mm, pressure 140MPa).

Over the years, Douson has fully won market recognition by driving services with equipment, and has successively provided multiple sets (sets) of fracturing equipment and supporting services for fracturing operations at multiple well sites: delivered to PetroChina, Sinopec, and Jereh Nengfu through leasing , and the after-sales team followed up the service throughout the whole process, and implemented fracturing services for more than 20 wells (basic specifications of gate valve: diameter 180mm, pressure 105MPa).

East China oil and gas leasing project (12 sets of manifold equipment: 5 sets of filter manifolds, 5 sets of choke manifolds, 2 sets of fracturing manifolds). <br>
Douson and Sinopec East China Oil and Gas Branch continue to maintain a lease cooperation relationship, mainly supplying in-line diversion manifolds, T-shaped diversion manifolds, debris collection manifolds, and choke manifolds.

Delivered by leasing to the fracturing project of Huangmou Well in Yongchuan, Honghua, Sichuan: diameter 180mm, pressure 140MPa.

Delivered by leasing to the fracturing project of Huangmou Well in Yongchuan Drilling in the west (diameter 180mm, pressure 140MPa). The high and low pressure manifold plug valves and hydraulic gate valves adopt electric drive devices, saving manpower and ensuring the safety of construction workers.

Remote electric control of the main valve of the sand removal manifold; 20000psi pressure level; excellent performance under high temperature conditions (-46°C-180°C); corresponding solutions are provided according to the customer's on-site construction needs. <br>
Many "star wells" are widely used in the development of domestic oil and gas fields. Among them, "Gaotan 1 well" located in Wusu City, Tacheng District, Xinjiang is a risk exploration well, which once created the highest daily production record of a single well of continental clastic rock , achieving a major breakthrough in the century-old exploration of the southern margin of the Junggar Basin.

Douson has delivered a series of electric drive ultra-high pressure and low temperature resistant equipment such as electric debris collection manifold, electric throttling manifold and electric sand removal manifold to Xinjiang. Since the equipment has been in service under cold weather conditions, its performance has been stable and it is fully adapted to the local working conditions.