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Sayindla Sneha - One of the best experts on this subject based on the ideXlab platform.
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Study of Cuttings Transport Using Water-Based and Oil-Based Drilling Fluids
'Norwegian University of Science and Technology (NTNU) Library', 2018Co-Authors: Sayindla SnehaAbstract: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 factor for efficient hole cleaning. The present work reports pure hydraulic and cutting transport behavior of various oil-based and water-based drilling fluids. Flow loop experiments were conducted on a purpose-built flow loop close to realistic field conditions. It has been observed, however, that the hole cleaning performance of drilling fluids can be different even if the fluid rheological properties are similar as measured in accordance with API specifications. The reasons for stated difference in the behavior of drilling fluids are not well understood. The objective of the present work was to compare hole cleaning performance of an oil-based drilling fluid and a water-based drilling fluid with similar density and viscosity measured as per API specifications. Also, to identify the reasons for differences in their hole cleaning behaviour. Limited studies are available in the literature which studied the same and conclusions differ. Hole cleaning efficiency of an oil-based drilling fluid and a water-based drilling fluid whose viscosity profiles are similar was investigated. The fluids tested were industrial fluids used in the field and were sent to us after reconditioning. Experimental studies were performed on an advanced purpose-built flow-loop by varying flow velocities and drill string rotation rates. The flow loop had a 10 m long annulus section with 4" inner Diameter Wellbore and 2" outer Diameter fully eccentric drill string. Pressure drop and sand holdup measurements were reported. Rheological investigations of the same fluids were used to understand the difference in the behavior of the drilling fluids tested. In case of no drill string rotation, better hole cleaning performance was observed with the oil-based fluid compared to the water-based fluid. With the presence of drill string rotation, hole cleaning performance of both the fluids was nearly the same
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Hole-cleaning performance comparison of oil-based and water-based drilling fluids
'Elsevier BV', 2017Co-Authors: Sayindla Sneha, Lund Bjørnar, Ytrehus, Jan David, Saasen ArildAbstract: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 factor for efficient hole cleaning. It has been observed, however, that the hole cleaning performance of drilling fluids can be different even if the fluid rheological properties are similar as measured in accordance with API specifications. The reasons for stated difference in the behavior of drilling fluids are not well understood. The main objective of present work is to evaluate hole cleaning efficiency of an oil-based drilling fluid (OBM) and a water-based drilling fluid (WBM) whose viscosity profiles are similar as per API specifications. Hole cleaning efficiency of an oil-based drilling fluid and a water-based drilling fluid whose viscosity profiles are similar was investigated. The fluids tested were industrial fluids used in the field and were sent to us after reconditioning. Experimental studies were performed on an advanced purpose-built flow-loop by varying flow velocities and drill string rotation rates. The flow loop had a 10 m long annulus section with 4″ inner Diameter Wellbore and 2″ outer Diameter fully eccentric drill string. Pressure drop and sand holdup measurements were reported. Rheological investigations of the same fluids were used to understand the difference in the behavior of the drilling fluids tested. Higher pressure drop was observed for WBM compared to OBM, and for both fluids, the pressure drop increased with drill string rotation speed. In case of no drill string rotation, better hole cleaning performance was observed with the oil-based fluid compared to the water-based fluid. With the presence of drill string rotation, hole cleaning performance of both the fluids was nearly the same
Saasen Arild - One of the best experts on this subject based on the ideXlab platform.
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Hole-cleaning performance comparison of oil-based and water-based drilling fluids
'Elsevier BV', 2017Co-Authors: Sayindla Sneha, Lund Bjørnar, Ytrehus, Jan David, Saasen ArildAbstract: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 factor for efficient hole cleaning. It has been observed, however, that the hole cleaning performance of drilling fluids can be different even if the fluid rheological properties are similar as measured in accordance with API specifications. The reasons for stated difference in the behavior of drilling fluids are not well understood. The main objective of present work is to evaluate hole cleaning efficiency of an oil-based drilling fluid (OBM) and a water-based drilling fluid (WBM) whose viscosity profiles are similar as per API specifications. Hole cleaning efficiency of an oil-based drilling fluid and a water-based drilling fluid whose viscosity profiles are similar was investigated. The fluids tested were industrial fluids used in the field and were sent to us after reconditioning. Experimental studies were performed on an advanced purpose-built flow-loop by varying flow velocities and drill string rotation rates. The flow loop had a 10 m long annulus section with 4″ inner Diameter Wellbore and 2″ outer Diameter fully eccentric drill string. Pressure drop and sand holdup measurements were reported. Rheological investigations of the same fluids were used to understand the difference in the behavior of the drilling fluids tested. Higher pressure drop was observed for WBM compared to OBM, and for both fluids, the pressure drop increased with drill string rotation speed. In case of no drill string rotation, better hole cleaning performance was observed with the oil-based fluid compared to the water-based fluid. With the presence of drill string rotation, hole cleaning performance of both the fluids was nearly the same
Lund Bjørnar - One of the best experts on this subject based on the ideXlab platform.
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Hole-cleaning performance comparison of oil-based and water-based drilling fluids
'Elsevier BV', 2017Co-Authors: Sayindla Sneha, Lund Bjørnar, Ytrehus, Jan David, Saasen ArildAbstract: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 factor for efficient hole cleaning. It has been observed, however, that the hole cleaning performance of drilling fluids can be different even if the fluid rheological properties are similar as measured in accordance with API specifications. The reasons for stated difference in the behavior of drilling fluids are not well understood. The main objective of present work is to evaluate hole cleaning efficiency of an oil-based drilling fluid (OBM) and a water-based drilling fluid (WBM) whose viscosity profiles are similar as per API specifications. Hole cleaning efficiency of an oil-based drilling fluid and a water-based drilling fluid whose viscosity profiles are similar was investigated. The fluids tested were industrial fluids used in the field and were sent to us after reconditioning. Experimental studies were performed on an advanced purpose-built flow-loop by varying flow velocities and drill string rotation rates. The flow loop had a 10 m long annulus section with 4″ inner Diameter Wellbore and 2″ outer Diameter fully eccentric drill string. Pressure drop and sand holdup measurements were reported. Rheological investigations of the same fluids were used to understand the difference in the behavior of the drilling fluids tested. Higher pressure drop was observed for WBM compared to OBM, and for both fluids, the pressure drop increased with drill string rotation speed. In case of no drill string rotation, better hole cleaning performance was observed with the oil-based fluid compared to the water-based fluid. With the presence of drill string rotation, hole cleaning performance of both the fluids was nearly the same
Ytrehus, Jan David - One of the best experts on this subject based on the ideXlab platform.
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Hole-cleaning performance comparison of oil-based and water-based drilling fluids
'Elsevier BV', 2017Co-Authors: Sayindla Sneha, Lund Bjørnar, Ytrehus, Jan David, Saasen ArildAbstract: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 factor for efficient hole cleaning. It has been observed, however, that the hole cleaning performance of drilling fluids can be different even if the fluid rheological properties are similar as measured in accordance with API specifications. The reasons for stated difference in the behavior of drilling fluids are not well understood. The main objective of present work is to evaluate hole cleaning efficiency of an oil-based drilling fluid (OBM) and a water-based drilling fluid (WBM) whose viscosity profiles are similar as per API specifications. Hole cleaning efficiency of an oil-based drilling fluid and a water-based drilling fluid whose viscosity profiles are similar was investigated. The fluids tested were industrial fluids used in the field and were sent to us after reconditioning. Experimental studies were performed on an advanced purpose-built flow-loop by varying flow velocities and drill string rotation rates. The flow loop had a 10 m long annulus section with 4″ inner Diameter Wellbore and 2″ outer Diameter fully eccentric drill string. Pressure drop and sand holdup measurements were reported. Rheological investigations of the same fluids were used to understand the difference in the behavior of the drilling fluids tested. Higher pressure drop was observed for WBM compared to OBM, and for both fluids, the pressure drop increased with drill string rotation speed. In case of no drill string rotation, better hole cleaning performance was observed with the oil-based fluid compared to the water-based fluid. With the presence of drill string rotation, hole cleaning performance of both the fluids was nearly the same
Agbongiator, Eddie Osarenmwida - One of the best experts on this subject based on the ideXlab platform.
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Screen and slotted liner horizontal completion: : correcting for Wellbore pressure drop in the inflow performance relationships (IPR)
Texas A&M University, 2002Co-Authors: Agbongiator, Eddie OsarenmwidaAbstract:Due to the character of the original source materials and the nature of batch digitization, quality control issues may be present in this document. Please report any quality issues you encounter to digital@library.tamu.edu, referencing the URI of the item.Includes bibliographical references (leaves 53-54).Issued also on microfiche from Lange Micrographics.This thesis presents the development of a correlation that will correct for error in a horizontal well's productivity calculations made by neglecting frictional pressure drop in the Wellbore. The advantage of this method is the ease of application compared to other methods that have been developed to correct for Wellbore pressure drop. It also significantly improves the accuracy of the productivity estimates. The specific tasks achieved in this work include the following: The development of the productivity error correlation to correct for Wellbore (frictional) pressure drop along the horizontal productive well length. A non-parametric regression program, GRACE, was used to analyse several simulated productivity data and to develop a Productivity Error (P.E.) correlation. The correlation, which was simplified using the Table Curve program, is a function of horizontal well length, viscosity, well Diameter, Wellbore roughness, and production rate. The validation of two commonly used productivity relationships that were derived by assuming either a constant Wellbore pressure or a uniform flux. The validation was done with simulated data to support the use of these relationships with the productivity error correlation that was developed. The aim was to ensure that these relationships are valid over the range of values that were used in this study. Due to the significant effect of Wellbore roughness on horizontal well productivity, an extensive literature search was also conducted for materials that will help to determine the true roughness of screen and slotted liner horizontal well completions. The productivity correlation that was developed had R² = 0.998 and it was validated using several simulated cases. The correlation is applicable to pseudosteady-state flow and it can be used to correct for error in a horizontal well's productivity calculations made by neglecting frictional pressure drop. It can also be used to optimize horizontal well length and Diameter