This paper described the development of an innovative non-planar PDC bit through cutting mechanism study and lab testing verification.Experimental results showed that the non-planar cutter delivers se
Influx and loss are the two kinds of bottom hole complex accidents.They not only cause the reservoir damage,increase the exploration cost,reduce the drilling ef-ficiency;but also induce major malignan
As it is known to all,lift sub is a short drill string component that is tem-porarily connected to the top of a tool assembly that is to be lifted vertically,such as when running or retrieving a tool
Vibration measurement while drilling is very important.Real-time analysis of the vibration data can be used to evaluate the performance of the downhole tools and to identify the rocks.This paper brief
This paper outlines the technology and benefits of the downhole electric motor drilling system.This step change in drilling engineering is achieved through drilling motor powered by electricity and do
Invasion of drilling fluid into natural gas hydrate deposits during drilling might damage the reservoir,induce hydrate dissociation and then cause wellbore instability and distortion of the data from
Using ABAQUS to analyze 30 sets of models with different expanding cone slope angle,a case study has been conducted on the φ 194 × 10 type solid expandable tu-bular in this paper.The effects of the ex
With the constant development of drilling industry,the design of the top drive device has tended to be mature.However,there is still a lack of research on condi-tion monitoring and intelligent diagnos