Pigging Technology of Large Drop Oil and Gas Gathering Pipeline in Shunbei Oilfield

The risk of pigging and the current situation of large drop oil and gas gathering pipelines in Shunbei oilfield were analyzed in this paper. The large drop in height gathering pipelines of Shunbei oilfield had the risk of pigging jamming, eccentric wear of the pigging and loss of the pigging positioning device in pigging due to the harsh working conditions of the transmission medium and the large drop in height pipelines, and referring to the simulation results of typical oil and gas pipeline pigging process by OLGA softwear. The type and parameters of pigging were optimized through investigation, in order to avoid the damage of the pig, the running speed of the pig should not exceed 4.95 m/s. The interference of foam pigging and mechanical pigging should be 5%-8% and 2%-5% either; the back pressure of the pigging should not exceed 2 MPa. The pigging effect of Shunbei typical gas gathering and transmission pipeline was good by referring to pigging technical parameters.