Research progress of wax deposition in multiphase mixed transmission pipeline

The wax deposition of submarine pipe is obviously a severe fluidity security problem. The paper reviews the previous investigation results in which the mechanism of multiphase flow wax deposition, experiment apparatus and dynamic models are analyzed, and illustrates the mechanism of aged wax deposition which relies on "shear disbonding" function. A couple of experiment setups are introduced including cold plate test, cold finger test, rotating round plate test and loop test, in which the pros and cons of loop test is specifically introduced. The Singh model and Hernandez model are also listed, and based on the two models, the dynamic model is illustrated with regard to both the oil/gas and oil/water wax deposition. Combined with the multiphase flow laws, the paper presents that the study of multiphase flow wax deposition problem should start from the investigation of its mechanism to seek the key factor of affecting the wax deposition process through experiment and to establish the physical model for wax deposition of considering different flow patterns.