Weight on the bit is accomplished by running in the hole, between the bit and the drill pipe, several lengths of extremely heavy thick-walled pipe, called “drill collars”. Drill pipe may weigh up to 30 kg/m. Drill collars, of larger diameter than drill pipe and of constant diameter throughout, can weigh up to IS0 kg/m. The full hanging weight of the whole assembly in the blocks in the derrick (...

The article discusses the geological structure and prospects of oil gas potential north-eastern part Predpatomsky regional trough. features ratio structural plans upper lower parts section due to thrust dislocations are indicated. It is assumed that deep drilling in area Ulugur has not reached target productive horizons autochthonous section. Here, after clarifying scope seismic work, it propos...

The continuous development of global economy with decreasing in available hydrocarbon sources and increasing discovery and extraction costs due to decrease in-situ oil and gas reservoir, displays the necessity of using new techniques for the improve rate of penetration and productivity in well. Nanotechnology has already contributed significantly to technological advances in the energy industri...

Detecting karstification processes in hydrocarbon carbonate reservoirs is important because of their porosity, permeability and also the risk associated with their drilling. A very useful technique to locate buried karsts is 3D seismic. In this research, seismic frequency decomposition (spectral decomposition) and seismic inversion techniques used to identify these sub-surface diagenetic featur...

The Deepwater Horizon semi-submersible Mobile Offshore Drilling Unit (MODU), leased to BP (previously British Petroleum, now simply “BP”, with the previously-used promotional tagline of “beyond petroleum”) suffered an explosive “blowout” on April 20, 2010 which resulted in what is now the largest offshore oil spill in United States (U.S.) history, and currently estimated to be at least the seco...

The carbonate lithofacies of the Nganzi Exploratory Block located in Lukula Territory Central Kongo Province were described field, sampled and subjected to microscopic, mineralogical, physico-chemical petrophysical analyses. aim is increase probability discovery deposits following drilling exploration wells most appropriate structures. These carbonates, limestones (white, greyish greenish) dolo...

Introduction Copyright 2004, Society of Petroleum Engineers Inc. There are many aspects of hydrocarbon production processes where understanding the flow of non-Newtonian fluids in porous media is of great interest. These include well drilling and construction, reservoir stimulation and production. In particular, complex polymeric solutions have been used for water-control purposes or to enhanc...

Analysis of the drilling fluid temperature due to heat transfer of drilling fluid with the formation in under-balanced drilling operation is the main objective of this study. Gas-liquid two-phase flow model considering thermal interaction with the formation is used to numerically simulate a well with real dimensions. In the present study, the continuity, momentum, and energy equations are devel...

BACKGROUND Higher risk of exposure to environmental health hazards near oil and gas wells has spurred interest in quantifying populations that live in proximity to oil and gas development. The available studies on this topic lack consistent methodology and ignore aspects of oil and gas development of value to public health-relevant assessment and decision-making. OBJECTIVES We aim to present ...

During 2003-2013, fatality rates for oil and gas extraction workers decreased for all causes of death except those associated with fall events, which increased 2% annually during 2003-2013 (1). To better understand risk factors for these events, CDC examined fatal fall events in the oil and gas extraction industry during 2005-2014 using data from case investigations conducted by the Occupationa...