Hydraulic pulsation assisted nitrogen-chemical flooding ground control device and implementation method

[0039] A hydraulic pulsation assisted nitrogen-chemical flooding ground control device, including a pulsation generator 5 .

[0040] The pulsation generator is a hollow lumen, one end of the lumen is an inlet, the wall of the lumen is provided with an outlet, the other end of the lumen is open and connected to a hydraulic cylinder block 19 , and the hydraulic cylinder block is connected to a pressure transmission tube 21 .

[0041]Gas injection inlet 1, liquid injection inlet 3 and chemical agent injection inlet 4 are respectively set at the inlet, and a hydrocyclone 2 is arranged inside the inlet, and the hydrocyclone plays a mixing role after the three injection channels at the inlet, single-phase When the liquid is injected, it only plays an energy-increasing role. The outlet includes a normal outlet 7 and an atomization outlet 22. A sleeve 11 is arranged inside the lumen of the pulsation generator, and a main piston 8 is arranged inside the sleeve. One end of the sleeve is op

[0045] A hydraulic pulsation assisted nitrogen-chemical flooding ground control device, its structure is as described in Embodiment 1, the difference is that the lumen behind the hydrocyclone 2 is a gas-liquid mixing chamber 6, and the length of the gas-liquid mixing chamber is greater than Hydrocyclone length. The gas and liquid are fully mixed in the mixing chamber.

[0047] A hydraulic pulsation assisted nitrogen-chemical flooding ground control device, its structure is as described in Embodiment 1, the difference is that the atomization outlet 22 includes an atomizer 10 and a one-way valve 9; the normal outlet is provided with a one-way valve valve. The outlet is located on the lumen wall at one end of the gas-liquid mixing chamber. Both the main piston and the piston are fixed on the piston rod. When the piston drives the sleeve away from the gas-liquid mixing chamber to the stroke limiter, the fluid can reach the outlet.