Browsing NTNU Open by Author "Skalle, Pål"
Now showing items 21-40 of 75
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Evaluation of Rheology and Pressure Losses for Oil-based Drilling Fluids in a Simulated Drilling Process
Assembayev, Dias Viktorovitsj (Master thesis, 2015)The advancements in the field of hydraulics have indicated that eccentricity in the well greatly reduces the pressure losses. This knowledge has been readily adopted in the industry practice, but the theoretical approximations ... -
Evidences of Poor Cement Displacement Jobs
Mwang'ande, Alex William (Master thesis, 2016)Cementing operation is one of the most challenging tasks in the completion phase of oil and gas wells. Many problems here are related to cement- displacement process, blending, additives, and the entire design of the ... -
Evidences of Poor Hole-cleaning or of Wellbore Instability through Hook load Response
Mkuyi, Fred Robert (Master thesis, 2016)Poor hole-cleaning and wellbore instability are well-known problems during drilling operation. If they are not diagnosed in their early stage of development, they result in non-productive time (NPT). In order to reduce ... -
Experimantal Investigation of Properties of Oil Well Cement
Rolland, Vegard Sletbakk (Master thesis, 2014)Accidental gas migration is a problem all drilling engineers are trying to avoid. Good cementing practice between the casing and the wellbore is one of the preventive actions. Shrinkage may lead to insufficient protection ... -
Experimental Cuttings Transport in Horizontal Wellbore: The Determination of Cuttings bed Height
Effiong, Francis (Master thesis, 2013)Poor hole cleaning problems during drilling operations has been the reason for several unwanted issues encountered during drilling. Hence, the numerous researches work on cuttings transportation. This project work presents ... -
Experimental design and mathematical simulation of hookload while tripping through bends.
Xie, Xiyang (Master thesis, 2015)To meet the growing demand of energy consumption, oil companies are trying their best to produce oil. However, in the past few years, the oil price has kept going down and dampened the whole industry. On one side, oil ... -
EXPERIMENTAL STUDY OF DRILLING MUD RHEOLOGY AND ITS EFFECT ON CUTTINGS TRANSPORT
Ezekiel, Ekerette Elijah (Master thesis, 2012)To determine the carrying capacity of the drilling fluid, also determine the settling velocities of the drilling cuttlings. To produce the Reynold's number experimentally. -
Experimental Testing of Initial Hook Load During Tripping in Horizontal Well
Andersen, Robin Dragstmo (Master thesis, 2015)One of the major problems in drilling operations occur during tripping out of the well. Inside the well there are often restrictions making it difficult or impossible to pull out the drill string including its bottom hole ... -
Failure Characterization During Oil Well Drilling
Linge, Fredrik Rennie (Master thesis, 2017)Accessing remaining oil and gas reserves around the world is getting more and more complicated and wells have to be longer, deeper and more complex in order to compensate. With an increase in well complexity comes new ... -
Flow properties of water-based drilling fluids
Kristensen, Aleksander (Master thesis, 2013)The objective of this master thesis was to investigate the flow properties of water based drilling fluids, utilizing measurements in both the micro and macro scale. The research was performed on two realistic drilling ... -
Friction Factor Model and Interpretation of Real Time Data
Frafjord, Christine (Master thesis, 2013)The interest in torque and drag issues has over the last years increased when the complexity of wells drilled has become higher. The petroleum industry continually expands the extended reach drilling envelope, which forces ... -
Friction Factors in Oil Wells through Analysis of Hook Load
Skarvøy, Christina Frengen (Master thesis, 2014)As the easy oil and gas is gone, there is today a need for more complex wells in orderto extract the remaining hydrocarbons. Over recent decades, both inclination andlength of drilled wells have increased significantly. ... -
Gel Evolution in Oil Based Drilling Fluids
Sandvold, Ida (Master thesis, 2012)Drilling fluids make up an essential part of the drilling operation. Successful drilling operations rely on adequate drilling fluid quality. With the development of new drilling techniques such as long deviated sections ... -
Gelling
Kronborg, Per Kristian Engvik (Master thesis, 2012)Today wells are drilled in deeper and colder water. If the circulation is stopped and the drilling fluid is at rest, most drilling fluids will develop gel strength. In colder water the gel strength becomes higher. To resume ... -
Human related root causes behind oil well drilling accidents
Hernæs, Marthe Pernille Voltersvik (Master thesis, 2012)Many accident investigation techniques and other methods used by the petroleum industry today list a set of underlying human related causes and subsequent improvement suggestions. Do these techniques address the root cause ... -
Improved drilling process through the determination of hardness and lithology boundaries
Solberg, Silje Marie (Master thesis, 2012)The main objective of drilling a well is the potential economic profit. The total cost of a drilling operation result from a complex interplay of many factors (Graham and Muench, 1959). Work that can optimize some of these ... -
Improving Cementing Practices for Top Hole Casing Strings at the Valhall Field.
Kinn, Andreas Andersen (Master thesis, 2014)The main goal of a primary cement job is to provide zonal isolation in the well. Obtaining zonal isolation according to regulations at the Valhall field have been challenging. The complex overburden at Valhall contains ... -
Improving The Efficiency Of Transportation Of Cuttings In Wellbore - Experimental Investigations On Critical Rolling And Lifting Velocities
Egbue, Jude Chibuike (Master thesis, 2017)Poor hole cleaning have dire consequences and as a result, special efforts and considerations are planned in drilling operations to avoid complications or hole cleaning issues. Drillers have often been tasked by finding ... -
Inclination Control and Deviation Detection (Create Matlab agents to report wellbore Inclination and Deviation)
Costantine, Martine (Master thesis, 2019)Inclination or deviation related well problems are well known problems during drilling operation. These problems are like tool failure, stuck pipe, logging problem, casing running challenge and borehole cleaning problem. ... -
Integrated Case Based and Rule Based Reasoning for Decision Support
Eshete, Azeb Bekele (Master thesis, 2009)This project is a continuation of my specialization project which was focused on studying theoretical concepts related to case based reasoning method, rule based reasoning method and integration of them. The integration ...