The Experts below are selected from a list of 123 Experts worldwide ranked by ideXlab platform
Mehmet Sorgun - One of the best experts on this subject based on the ideXlab platform.
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friction factors for Hydraulic calculations considering presence of cuttings and pipe rotation in horizontal highly inclined wellbores
Journal of Petroleum Science and Engineering, 2011Co-Authors: Mehmet Sorgun, Ismail Aydin, Evren M OzbayogluAbstract:Pressure loss calculations have a vital role for determining Hydraulic Horsepower requirements and to predict bottomhole treating pressure. One of the major concerns in developing Hydraulic programs is to estimate the frictional pressure losses while cuttings are present in the annulus during pipe rotation. An experimental work has been carried out in a cuttings transport flow loop capable of operating at various inclinations. The pressure drop in the test section was recorded for variable flow rates, cuttings concentrations, pipe inclinations and rotation speeds. Existence of cuttings increase the pressure drop due to decrease in flow area inside the wellbore. As there are cuttings in the system, pipe rotation decreases the frictional pressure loss considerably in particular if the pipe is making an orbital motion in the eccentric annulus. Cuttings bed thickness defined as the ratio of cuttings bed area to the wellbore area is expressed in terms of dimensionless parameters obtained from dimensional analysis. Empirical expressions and charts for friction factor are proposed for low and high viscosity fluids in terms of combined Reynolds number and stationary cuttings bed thickness.
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Friction factors for Hydraulic calculations considering presence of cuttings and pipe rotation in horizontal/highly-inclined wellbores
Journal of Petroleum Science and Engineering, 2011Co-Authors: Mehmet Sorgun, Ismail Aydin, M. Evren OzbayogluAbstract:Pressure loss calculations have a vital role for determining Hydraulic Horsepower requirements and to predict bottomhole treating pressure. One of the major concerns in developing Hydraulic programs is to estimate the frictional pressure losses while cuttings are present in the annulus during pipe rotation. An experimental work has been carried out in a cuttings transport flow loop capable of operating at various inclinations. The pressure drop in the test section was recorded for variable flow rates, cuttings concentrations, pipe inclinations and rotation speeds. Existence of cuttings increase the pressure drop due to decrease in flow area inside the wellbore. As there are cuttings in the system, pipe rotation decreases the frictional pressure loss considerably in particular if the pipe is making an orbital motion in the eccentric annulus. Cuttings bed thickness defined as the ratio of cuttings bed area to the wellbore area is expressed in terms of dimensionless parameters obtained from dimensional analysis. Empirical expressions and charts for friction factor are proposed for low and high viscosity fluids in terms of combined Reynolds number and stationary cuttings bed thickness.
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Frictional Pressure Loss Estimation of Non-Newtonian Fluids in Realistic Annulus With Pipe Rotation
Journal of Canadian Petroleum Technology, 2010Co-Authors: Evren Ozbayoglu, Mehmet SorgunAbstract:The annular frictional performance of non-Newtonian fluids is among the major considerations during development of Hydraulic programs for drilling operations. Proper estimation of the frictional pressure losses become more critical when determining Hydraulic Horsepower requirements and selecting proper mud pump systems to foresee any serious problems that might occur with Hydraulics during drilling operations. Because the rheological behaviour of the non-Newtonian fluids is known to be challenging, it becomes even more complicated during pipe rotation, especially in eccentric wellbores. In many cases, significant differences are observed when theoretical calculations and measurements for pressure losses are compared. This study aims to develop correction factors for determining the frictional pressure losses accurately in eccentric horizontal annulus for non-Newtonian fluid, including the effect of pipe rotation. Extensive experimental work has been conducted on METU-PETE Flow Loop for numerous non-Newtonian drilling fluids, including KCl-polymer muds and PAC systems for different flow rates and pipe rotation speeds, and frictional pressure losses are recorded during each test. Rheological characteristics of the drilling fluids are determined using a rotational viscometer. Observations showed that pipe rotation has a significant influence on frictional pressure loss, especially at lower flow rates. Up to a point, as the pipe rotation increases, the frictional pressure losses also increase. As the flow rates are increased, the effect of pipe rotation on frictional pressure losses diminishes. Also, after a certain pipe rotation speed, no additional contribution of pipe rotation on frictional pressure loss is observed. When the developed friction factors are used, there is a good agreement between the calculated and observed frictional pressure losses for any pipe rotation speed.
P. C. Harris - One of the best experts on this subject based on the ideXlab platform.
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Constant-internal-phase design improves stimulation results
Spe Production Engineering, 1991Co-Authors: P. C. Harris, D. E. Klebenow, Pat D. KundertAbstract:For several years, foam fracturing has been an excellent technique for stimulating low-pressure reservoirs. Conventional foam treatments, however, have been inconsistent in placing high sand concentrations and often reached a pressure limitation, which prematurely terminated the treatment. This paper reports on a design approach to foam fracturing, the constant-internal-phase technique, that has overcome previous sand limitations and has allowed treatments to be pumped with less severe pressure fluctuations. This approach treats all internal phases (gas, liquid, or solid) the same and recognizes the similarities in behavior among foams, emulsions, and slurries. A fluid's bulk viscosity increases as the total internal-phase fraction increases, particularly at high internal-phase ratios. The constant-internal-phase approach has produced more predictable wellhead treating pressures (WHTP's), used less Hydraulic Horsepower, and virtually eliminated premature job termination owing to pressure limitations.
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Constant-internal-phase design improves stimulation results
1991Co-Authors: P. C. Harris, D. E. Klebenow, D. P. KundertAbstract:New design approach to foam fracturing, the constant-internal-phase technique, treating all internal phases( gas, liquid, or solid) the same and recognizing the similarities in behavior among foams, emulsions, and slurries. The constant-internal-phase approach has produced more predictable wellhead treating pressures (WHTP), used less Hydraulic Horsepower, and virtually eliminated premature job termination owing to pressure limitations.
Pat D. Kundert - One of the best experts on this subject based on the ideXlab platform.
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Constant-internal-phase design improves stimulation results
Spe Production Engineering, 1991Co-Authors: P. C. Harris, D. E. Klebenow, Pat D. KundertAbstract:For several years, foam fracturing has been an excellent technique for stimulating low-pressure reservoirs. Conventional foam treatments, however, have been inconsistent in placing high sand concentrations and often reached a pressure limitation, which prematurely terminated the treatment. This paper reports on a design approach to foam fracturing, the constant-internal-phase technique, that has overcome previous sand limitations and has allowed treatments to be pumped with less severe pressure fluctuations. This approach treats all internal phases (gas, liquid, or solid) the same and recognizes the similarities in behavior among foams, emulsions, and slurries. A fluid's bulk viscosity increases as the total internal-phase fraction increases, particularly at high internal-phase ratios. The constant-internal-phase approach has produced more predictable wellhead treating pressures (WHTP's), used less Hydraulic Horsepower, and virtually eliminated premature job termination owing to pressure limitations.
Herianto Topan - One of the best experts on this subject based on the ideXlab platform.
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Hydraulic Horsepower optimization to predict the rate of penetration
2018Co-Authors: Herianto TopanAbstract:The rate of penetration has an important role in the success of a drilling operation, this is because if the rate of penetration is not optimum will have an impact on the cost incurred. In this case study the well that will be analyzed is vertical well so that bit’s Hydraulic optimization is performed using Bit Hydraulic Horse Power (BHHP) method by adjusting the nozzle size and circulation rate, this method will be optimum if BHHP/HPs ratio is 65%. Evaluation on trajectory 12 ¼ well “SGT-01” field “Tranusa", obtained bit’s Hydraulics on the actual conditions at 2657.48 ft - 2723.10 ft depth interval obtained Bit Hydraulic Horse Power (BHHP) of 232.67 hp, Horse Power Surface (HPs) 499.82 hp, Horse Power per Square Inches (HSI) of 1.67 hp / in² and percentage (BHHP/HPs) of 46.55% (<65%) indicating less optimum then optimized Hydraulic bit circulation rate optimized to 710 gpm with Horsepower Hydraulic Horse Power (HPH) of 936.47 hp, Horse Power per Square Inches (HSI) of 5.4 hp / in² and percentage (BHHP/HPs) of 65% (already optimum). The final result of the evaluation and optimization of bit Hydraulics and the removal of cutting is predicted to increase ROP from 46 to 125 fph.
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Hydraulic Horsepower Optimization to Predict the Rate of Penetration
2018Co-Authors: Herianto TopanAbstract:The rate of penetration has an important role in the success of a drilling operation, this is because if the rate of penetration is not optimum will have an impact on the cost incurred. In this case study the well that will be analyzed is vertical well so that bit’s Hydraulic optimization is performed using Bit Hydraulic Horse Power (BHHP) method by adjusting the nozzle size and circulation rate, this method will be optimum if BHHP/HPs ratio is 65%. Evaluation on trajectory 12 ¼ well “SGT-01” field “Tranusa", obtained bit’s Hydraulics on the actual conditions at 2657.48 ft - 2723.10 ft depth interval obtained Bit Hydraulic Horse Power (BHHP) of 232.67 hp, Horse Power Surface (HPs) 499.82 hp, Horse Power per Square Inches (HSI) of 1.67 hp / in² and percentage (BHHP/HPs) of 46.55% (
D. E. Klebenow - One of the best experts on this subject based on the ideXlab platform.
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Constant-internal-phase design improves stimulation results
Spe Production Engineering, 1991Co-Authors: P. C. Harris, D. E. Klebenow, Pat D. KundertAbstract:For several years, foam fracturing has been an excellent technique for stimulating low-pressure reservoirs. Conventional foam treatments, however, have been inconsistent in placing high sand concentrations and often reached a pressure limitation, which prematurely terminated the treatment. This paper reports on a design approach to foam fracturing, the constant-internal-phase technique, that has overcome previous sand limitations and has allowed treatments to be pumped with less severe pressure fluctuations. This approach treats all internal phases (gas, liquid, or solid) the same and recognizes the similarities in behavior among foams, emulsions, and slurries. A fluid's bulk viscosity increases as the total internal-phase fraction increases, particularly at high internal-phase ratios. The constant-internal-phase approach has produced more predictable wellhead treating pressures (WHTP's), used less Hydraulic Horsepower, and virtually eliminated premature job termination owing to pressure limitations.
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Constant-internal-phase design improves stimulation results
1991Co-Authors: P. C. Harris, D. E. Klebenow, D. P. KundertAbstract:New design approach to foam fracturing, the constant-internal-phase technique, treating all internal phases( gas, liquid, or solid) the same and recognizing the similarities in behavior among foams, emulsions, and slurries. The constant-internal-phase approach has produced more predictable wellhead treating pressures (WHTP), used less Hydraulic Horsepower, and virtually eliminated premature job termination owing to pressure limitations.
