The change from steerable motor to rotary steerable system has been both technically and commercially successful in Lybia. Through these case histories the paper will demonstrate benefits resulting from the use of rotary steerable systems that have led to a step change in overall drilling performance in the Middle East. This paper describes the successful introduction and application of a rotar...

In oil and gas and geothermal installations, open channels followed by sieves for removal of drill cuttings, are used to monitor the quality and quantity of the drilling fluids. Drilling fluid flow rate is difficult to measure due to the varying flow conditions (e.g., wavy, turbulent and irregular) and the presence of drilling cuttings and gas bubbles. Inclusion of a Venturi section in the open...

This paper describes a new architecture for reasoning that combines case-based and model-based reasoning, referred to as knowledge intensive CBR (KiCBR). The case retrieval process is explained and compared through different reasoning approaches; plain CBR, and two forms of knowledgeintensive CBR. The mentioned methods are applied to problems in oil well drilling, a challenging domain. Knowledg...

When drilling an oil well, the well is lined by sinking a steel casing, or liner, into the drilling mud (see Figure 1). The inside of the liner forms a central pipe, and leaves an annular gap between the outside of the liner and the surrounding rock. The inside and outside of the liner are initially filled with drilling mud, which is displaced by pumping a sequence of fluids down inside the lin...

conclusions our results showed that only 17% of the measured points in the oil drilling rig floor were in safe area; 39% were in caution area and 44% were in danger area. in the camp facilities area, 51% of the points were in safe area, 38% were in caution area and 11% in danger area. the main sources of noise exposure in the rig floor area were power generators. materials and methods this was ...

This paper examines the importance of learning-by-doing that is specific not just to individual firms, but to pairs of firms working together in a contracting relationship. Using new, detailed data from the oil and gas industry, I find that the joint productivity of an oil production company and its drilling contractor is enhanced significantly as they accumulate experience working together. Th...

Marine environments are frequently exposed to oil spills as a result of transportation, oil drilling or fuel usage. Whereas large oil spills and their effects have been widely documented, more common and recurrent small spills typically escape attention. To fill this important gap in the assessment of oil-spill effects, we performed two independent supervised full sea releases of 5 m(3) of crud...

An experimental apparatus has been developed to measure the CO 2 solubility in water, brines, polymer solutions, white oil and drilling fluids using sample analysis method. The results show that electrolytes can significantly reduce of water salting-out effect be enhanced by increasing molar concentration salt ions. influences different polymers are similar, which gas a certain extent. Furtherm...

The drilling process is getting increasingly more complex as oil fields mature and technology evolves. At the same time, the amount of information is increasing in volume and fr equency. Although technology is advancing, failures do occur, leading to loss of valuable time. When ever the process is running smoothly or is failing , valuable experience is gained . However, experience attrition is ...