摘要：Widely used as it is, pipeline pigging still holds ambiguities in its mechanisms. In this paper we explore the nature of the wax removal process with a unique pigging facility. Solid wax content, yield stress, viscoelasticity, and microscopic characteristics of wax samples are thoroughly studied with differential-scanning-calorimetry (DSC) trials, Theological tests, and microscopic observations. We found that the relative solid wax content is approximately linearly dependent on temperature, and yield stress can be well-fitted with wax content in an exponential format. An investigation on wax-breaking force indicates that it increases with solid wax content. Wax removal efficiency increases with wax thickness and pipe-wall temperature, decreases with a wax-mixing ratio and solid wax content, and it varies irregularly vs. the scraping-element hardness in the pig. Furthermore, a prediction model of wax removal efficiency was developed on the basis of nondimensional analysis. The absolute average deviation of verification experiments against this model is 5.22%. This model might benefit in estimating the wax-scouring capacity of the wax-in-oil slurry and, therefore, helps to avoid wax blockage and to arrange the pigging program.

关键字：CRUDE OILS DEPOSITION TEMPERATURES DIMENSION

ISSN号：1930-1855

卷、期、页：卷: 34 期: 1 页: 216-231

发表日期：2019-02-01

影响因子：0.766000

期刊分区（SCI为中科院分区）：四区

收录情况：SCIE（科学引文索引网络版）,ESI（基本科学指标数据库）

发表期刊名称：SPE Production and Operations

参与作者：王文达

通讯作者：李卫东,任翌劼,董雪,赵旗

第一作者：黄启玉,侯磊

论文类型：期刊论文

论文概要：李卫东,黄启玉,王文达,任翌劼,董雪,赵旗,侯磊，Study on Wax Removal During Pipeline-Pigging Operations，SPE Production and Operations，2019，卷: 34 期: 1 页: 216-231

论文题目：Study on Wax Removal During Pipeline-Pigging Operations