Pressure relief drilling is one of the most common techniques to reduce impact rock burst, but useful dynamic phenomena in process are ignored due lack corresponding technical methods. Based on fact, an innovative measurement method for vibration signals during construction by pneumatic drill rig presented this study. The acquisition and analysis show that information can reflect depth, amplitu...

Antarctica, with a large number of ice sheets, is among the last unexplored places on Earth. The subglacial lakes beneath these sheets have been isolated from outside world for up to 35 million years, containing diverse group marine organisms and other materials. Its unique hydrological environment provides insights regarding microbial evolution past climates Earth, which become central interpr...

A puzzle that faces public administrators within regulatory governance networks is how to balance the need for democratic accountability while increasingly facing demands from elected officials to optimize oversight of industry by utilizing the expertise of the private sector in developing risk-based standards for compliance. The shift from traditional command and control oversight to process o...

As part of a broad, multldlsciplinary effort to monitor the impact of petroleum exploration activities on the outer continental shelf areas of the Gulf of Mexico, the local effects of a drilllng rig on the benthic environment have been investigated. Petroleum hydrocarbons in or on seawater can become associated with suspended sediment partlcles I and be transported downward and incorporated int...

I present the equations for migrating IVSPWD (inverse VSP while drilling) autocorrelograms. These equations extend the Katz IVSPWD method to 2-D and 3-D media, and also provide a formal mathematical justification for inverting the reflectivity distribution from IVSPWD autocorrelograms. In addition, I describe a new imaging condition which images the primary-reflection energy compared to the Kat...

This paper investigates an approach that combines ensemble methods with graphical models to analyse multiple sensor measurements in the context of mine automation. Drill sensor measurements used for drilling automation have the potential to provide an estimate of the subsurface geological properties of the rocks being drilled. A Boosting algorithm is used as a local classifier mapping drill mea...

Monitoring the flow rate out of the well is critical for good control of the downhole pressure in drilling operations. In this feasibility study, we explore the possibility of using a Venturi flume to provide a cost-effective measurement of the flow rate, with improved accuracy compared to conventional methods. A Venturi flume has been simulated both using CFD and a simplified 1D model. By prop...

The Deepwater Horizon drilling rig exploded in April 2010, resulting in widespread environmental, economic, and population health damage. Previous oil spills have resulted in emotional consequences in local populations that rely on affected areas for their economic and nutritional livelihoods.1–4 Less is known about the mental health effects among specific subpopulations, particularly women who...

Power head with high power and large torque is the main power equipment of the rotary drilling rig. Aimed at the working condition, energy saving torque loading test program of power head was put forward and mathematical and simulation models of hydraulic energy closed-loop torque loading system were established. Combined with bond graph and state equations of torque loading system with single ...