Design and Application of Automatic Dust-free Convey Equipment for Heavy Medium Solid Material on Offshore Drilling Platform

Abstract

The Yingqiong Basin, a large high-temperature and high-pressure gas field in the South China Sea, is one of the three high-temperature and high-pressure areas in the world. According to incomplete statistics, from 1984 to 2013, a total of 30 high-temperature and high-pressure exploration Wells were drilled in the South China Sea. According to the drilling situation, there were 4 ultra-high temperature and high-pressure Wells with temperatures over 200°C and mud gravity over 2.20sg. With the increasing demand for oil and gas in China, the drilling operations of HP/HT Wells are also increasing, which is the inevitable trend of the development of oil and gas drilling technology. Due to the high pressure of Wells, drilling fluid need to be weighted by additives during cementing operations. In the past, these operations on offshore platforms were all done by manual. Therefore, we developed a set of positive-negative pressure conversion type continuous conveying device which integrated a weight medium negative pressure cutting device. The device consists of negative pressure dust-free feeding system, negative pressure conveying system, positive and negative pressure continuous conveying system, dust removal system and automatic control and detection system. It can realize flexible pipeline transmission through negative pressure and positive pressure. The device contains a variety of detectors to detect the operation situation in real time, and the control system can realize the functions of automatic control and automatic fault alarm. The results of experiment and field application show that the device can meet the high demand of heavy medium transportation.