Φ311 Automatic Vertical Drilling System

摘要

During drilling, deviation control and fast and effectively drilling is a common technique issue. Though there are some anti -deviation and well straightening methods at present in China, most of them have their disadvan tages, such as decreasing the bit weight and penetration speed. These drilling methods cannot achieve the aim of deviation control and fast drilling economically and effectively in high dip, fractured and other abnormal forma tions. Automatic Vertical Drilling System (AVDS) is a mechanical -electrical -hydraulic integrated drilling tool, and an intelligent drilling system. As an advanced technology,the AVDS is a breakthrough in deviation control and fast drilling. By the result of theoretical analysis and oilfield application, the A VDS can not only liberate the bit weight and greatly boost the rate of penetration, but also guarantee better well bore quality, which is an important premise of subsequent operation while drilling. Φ311 Automatic Vertical Drilling System (Φ311 AVDS) belongs to the relative -static -effective AVDS,it has been effectively and successfully tested in 2 wells in Xinjiang oilfield. By the results of the experiments, the inde xes of the Φ311 AVDS have met the design requirements and achieved the vertical and fast drilling aim in high dip formations. This paper aims to introduce the characteristics, operating principles and matching technologies of Φ311 AVDS.