Air Reverse Circulation Bit Internal Fluid Simulation Based on CFD

The article instructs the work principle of the injector device and its application in the reverse-circulation sampling drilling bit. Then use the fluent fluid engineering emulator software to simulate the internal fluid territory of the injector when the obliquity is 15, 30,45,60,75 and 90 degree. The pressure distributing cloud chart and the corresponding numerical value has been gotten. An injector with 6 degrees according to the conclusion from fluent was designed to experiment in the laboratory. Compare the two values we found that they are coincident essentially. It shows that using emulator technology to design optimization is credible and simple. The cost is low and the design cycle is short compared with the method through experience and test.