Blar i NTNU Open på forfatter "Skalle, Pål"
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Revealing the Cause behind Cement Failures by Means of the Knowledge Model of Oil Well Drilling
Løhre, Lise Løw (Master thesis, 2015)Safety improvement is a topic under a continuous focus offshore. To reduce the number of accidents, improvements are approached in several ways. Accident reports are analyzed, human factors are studied in depth and the ... -
Rheological Characterization of Water-Based Drilling Fluids - A Comparative analysis of Manual and Automated Measurements
Priyadharshini Saptharishi, Ms. (Master thesis, 2016)Drilling fluids play a vital role in the drilling of exploration and production wells and adequate understanding of the impact of drilling fluid rheology is a pre-requisite, so as to selectively design fluids that could ... -
Selection of Multilateral Well Configuration on Ekofisk South
Nesland, Bjørnar (Master thesis, 2013)In 2004 ConocoPhillips Norway (COPNO) drilled two multilateral wells in the Ekofisk field in the North Sea. These wells yielded more stable production rates, but had several issues and challenges when it came to junction ... -
Sement-forskyvningsprofiler: En analyse av lokal turbulent strøm
Ferizi, Sera (Master thesis, 2014)En effektiv forskyving av sement vil skape bedre binding mellom sement og formasjon. Dette skaper bedre isolasjon av formasjonen. Det fins flere faktorer som påvirker sementforskyvningen og som kan skape en bedre sement ... -
Study of Cuttings Transport Using Water-Based and Oil-Based Drilling Fluids
Sayindla, Sneha (Doctoral theses at NTNU;2018:108, Doctoral thesis, 2018)Cuttings transport is a topic of great interest in the oil and gas drilling industry. Insufficient cuttings transport leads to several expensive problems. Knowledge and selection of the drilling fluids is one of the important ... -
Surface volume control through continuous surveillance of drilling data
Carlsen, Tone (Master thesis, 2017)When a new well is being drilled, volume control should be among the most important focus areas for the drilling crew. In every drilling operation, pressures exerted from the formations need to be controlled and overbalance ... -
Surge and Swab Pressure Calculation: Calculation of Surge and Swab Pressure Changes in Laminar and Turbulent Flow While Circulating Mud and Pumping
Karlsen, Andreas Grav (Master thesis, 2014)Pressure changes due to Surge and Swabs has in many years been a big concern in the industry. If the pressure changes become too high, the formation can fracture, and formation influx can lead to a kick. In worst case ... -
Syntactic Foam as Mitigation against Thermally Induced Trapped Annulus Pressures on the Linnorm field
Naley, Helge Møller (Master thesis, 2013)An investigation on the feasibility of a crushable foamwrap productfor mitigation of annulus pressure buildup on the Linnorm projecthave been performed. Several different aspects of this technology havebeen investigated, ... -
The effect of cuttings on annular pressure loss - An analysis of field data in the North Sea
Wold, Andreas Anderssønn; Kummen, Håvard Tarjei (Master thesis, 2015)This master's thesis studies the correlation between rapid alterations in cuttings concentration and the corresponding change in pressure loss, using the standpipe pressure as pressure indicator. Drilling data from two ... -
The effect of nano-silica in oil-well cement
Tjemsland, Marius Haara (Master thesis, 2013)A goal for all drilling operations is that they are performed within satisfactory safety- and financial boundaries. A big part of this is that the cementing operations are performed in a best possible manner, and having a ... -
The Importance of Low-end-rheology and its Influence on Particle Slip Velocity
Guliyev, Elvin (Master thesis, 2013)The study of effective cuttings transports and understanding fluid rheological properties is a major concern in the drilling industry. Poor hole cleaning can lead to cuttings accumulations inside the annulus, low rate of ... -
The Influence of Drilling-Fluid Rheology on Cuttings-Bed Behavior
Werner, Benjamin (Doctoral theses at NTNU;2018:2, Doctoral thesis, 2018)Transporting cuttings out of the wellbore is an important part of every drilling operation to ensure efficiency and the reduction of non-productive time. The drilling fluids used for this task are complex fluid systems, ... -
The Influence of Velocity Profile on Cement Displacement Efficiency
Lupyana, Samwel Daud (Master thesis, 2015)The main objective of primary cement job is to provide complete isolation of the permeable zones behind the casing. This can be achieved by having an efficient cement displacement process. The challenge is always to have ... -
The True Weight on Bit
Prytz, Øystein Texmo (Master thesis, 2013)Drilling optimization is important for drilling companies in order to be cost effective and competitive. Using correct weight on bit (WOB) is a part of drilling optimization to achieve the optimal rate of penetration (ROP) ... -
Well Integrity behind casing during well operation.Alternative sealing materials to cement
Etetim, Dickson Udofia (Master thesis, 2013)Maintaining well integrity during all well operations has become a major concern for operators worldwide. The maintenance of an increasingly aging well stock and the higher cost associated with new wells makes well integrity ...