Effect of Coiled-Tubing Curvature on Friction-Pressure Loss of Xanthan Foams

2005 ◽  
Author(s):  
Parag Vijay Gujar ◽  
Subhash Nandlal Shah ◽  
Yunxu Zhou
Keyword(s):  
Pressure Loss ◽  
Coiled Tubing ◽  
Friction Pressure

Rheological Properties and Frictional Pressure Loss of Drilling, Completion, and Stimulation Fluids in Coiled Tubing

2004 ◽  
Vol 126 (2) ◽  
pp. 153-161 ◽  
Author(s):  
Yunxu Zhou ◽  
Subhash N. Shah
Keyword(s):  
Drag Reduction ◽  
Rheological Properties ◽  
Pressure Loss ◽  
Hydroxyethyl Cellulose ◽  
Test Facility ◽  
Drilling Mud ◽  
Polymeric Fluids ◽  
Pressure Losses ◽  
Coiled Tubing ◽  
Friction Pressure

The rheological properties and friction pressure losses of several common well-drilling, completion, and stimulation fluids have been investigated experimentally. These fluids include polymeric fluids—Xanthan gum, partially hydrolyzed polyacrylamide (PHPA), guar gum, and hydroxyethyl cellulose (HEC), bentonite drilling mud, oil-based drilling mud, and guar-based fracturing slurries. Rheological measurements using a Bohlin CS 50 rheometer and a model 35 Fann viscometer showed that these fluids exhibit shear thinning and thermal thinning behavior except the bentonite drilling mud whose viscosity increased as the temperature was raised. Flow experiments using a full-scale coiled tubing test facility showed that the friction pressure loss in coiled tubing is significantly higher than in straight tubing. Since the polymeric fluids displayed drag reducing property, their drag reduction behavior in straight and coiled tubings was analyzed and compared. Plots of drag reduction vs. generalized Reynolds number indicate that the drag reduction in coiled tubing was not affected by polymer concentration as much as in straight tubing. The onsets of turbulence and drag reduction in coiled tubing were significantly delayed as compared with straight tubing. The effect of solids content on the friction pressure losses in coiled tubing is also briefly discussed.

Coiled Tubing Fracturing Tube Pressure Loss Prediction Model

2013 ◽  
Vol 746 ◽  
pp. 515-519
Author(s):  
Dan Qiong Li ◽  
Shi Cheng Zhang ◽  
Suian Zhang
Keyword(s):  
Prediction Model ◽  
Pressure Loss ◽  
Rheological Parameters ◽  
Straight Pipe ◽  
Coiled Tubing ◽  
Friction Pressure ◽  
Loss Prediction ◽  
Pipe Segment ◽  
Basic Characteristics ◽  
Fluid Rheology

A coiled tubing pressure loss prediction model was established by fluid dynamics theory and method which based on the basic characteristics of the non-Newtonian fluid rheology; Construction displacement, sand ratio and well depth parameters of the pressure loss in the pipe, and calculated pipe pressure loss when the actual pumping process through examples. Thesis proposes: (1) the bend within the pressure loss is an important part of the pressure loss, should be based on the construction object to choice coiled tubing length reasonable, and minimize elbow paragraph length in order to reduce the pipe friction pressure loss. (2) Flow and sand ratio have the same impact of the law with the depth changes in the pressure loss of the straight pipe segment and elbow segment, increases linearly with the depth, flow or sand ratio the larger, more dramatic increase with the depth. Flow or sand ratio the larger the total pressure loss of the tube with the depth decreasing amplitude the greater. (3) According to the actual pump injection procedure, the tube fluid rheological parameters will change, inject pre-flush and replacement fluid the pipe pressure loss low; inject sand mixing liquid friction pressure loss high.

A model to calculate the pressure loss of Newtonian and non-Newtonian fluids flow in coiled tubing operations

2021 ◽  
Vol 204 ◽  
pp. 108640
Author(s):  
Beatriz Rosas Oliveira ◽  
Bárbara Cavalcante Leal ◽  
Leônidas Pereira Filho ◽  
Rodrigo Fernando de Oliveira Borges ◽  
Eduardo da Cunha Hora Paraíso ◽  
...  
Keyword(s):  
Pressure Loss ◽  
Newtonian Fluids ◽  
Coiled Tubing

Rheological and Hydraulic Properties of Drilling, Completion, and Stimulation Fluids in Straight and Coiled Tubings

2002 ◽  
Author(s):  
Y. Zhou ◽  
S. N. Shah
Keyword(s):  
Drag Reduction ◽  
Guar Gum ◽  
Polymer Concentration ◽  
Hydroxyethyl Cellulose ◽  
Test Facility ◽  
Drilling Mud ◽  
Polymeric Fluids ◽  
Pressure Losses ◽  
Coiled Tubing ◽  
Friction Pressure

The rheological properties and friction pressure losses of several fluids that are most commonly used as well drilling, completion, and stimulation fluids have been investigated experimentally. These fluids include polymeric fluids – Xanthan gum, partially hydrolyzed polyacrylamide (PHPA), guar gum, and hydroxyethyl cellulose (HEC), bentonite drilling mud, oil-based drilling mud, and guar-based fracturing slurries. Rheological measurements using a Bohlin CS 50 rheometer and a model 35 Fann viscometer showed that these fluids exhibit shear thinning and thermal thinning behavior except the bentonite drilling mud whose viscosity increased as the temperature was raised. Flow experiments using a full-scale coiled tubing test facility showed that the friction pressure loss in coiled tubing is significantly higher than in straight tubing. Since the polymeric fluids displayed drag reducing property, their drag reduction behavior in straight and coiled tubings was analyzed and compared. It was found that the drag reduction (DR) in coiled tubing is much lower than that in straight tubing. Plots of drag reduction vs. generalized Reynolds number indicate that the drag reduction in coiled tubing was not affected by polymer concentration as much as in straight tubing. The onsets of turbulence and drag reduction in coiled tubing were significantly delayed as compared with straight tubing. The effect of solids content on the friction pressure losses in coiled tubing is also briefly discussed.

Modeling of Hydraulic Line of Device Producing Fluctuant Load Based on Fluid Mechanics

2012 ◽  
Vol 252 ◽  
pp. 56-59
Author(s):  
Xian Bin Wang ◽  
Hong Xing Deng
Keyword(s):  
Fluid Mechanics ◽  
Pressure Loss ◽  
Hydraulic Pressure ◽  
Local Pressure ◽  
Line Model ◽  
Bench Tests ◽  
Friction Pressure ◽  
Experimental Bench ◽  
Pressure Characteristics

The paper deals with modeling of vehicle breaking system hydraulic line based on fluid mechanics. Under the consideration of friction pressure loss and local pressure loss in hydraulic line, an improved hydraulic line model is proposed. The experimental bench tests were carried out based on the device producing fluctuant load to verify the accuracy of the improved hydraulic line model. The system hydraulic pressure characteristics were analyzed by simulation using AMESim software.

scholarly journals Analysis of Circulating System Frictional Pressure Loss in Microhole Drilling with Coiled Tubing

2014 ◽  
Vol 7 (1) ◽  
pp. 22-28 ◽  
Author(s):  
Hou Xuejun ◽  
Zheng Huikai ◽  
Zhao Jian ◽  
Chen Xiaochun
Keyword(s):  
Pressure Loss ◽  
Drilling Fluid ◽  
Flow Regimes ◽  
Rational Utilization ◽  
Coiled Tubing ◽  
Well Depth ◽  
Calculation Models

In microhole drilling (MHD) with coiled tubing (CT), the calculation models of drilling fluid circulating frictional pressure loss (DFCFPL) are studied for different flow regimes of drilling fluid in CT on reel, downhole CT and annulus. Example analysis of DFCFPL for 89mm diameter microhole is conducted, and the relationships among the total DFCFPL, local DFCFPL in CT on reel, downhole CT and annulus are obtained. The smaller the CT diameter is, the higher the local DFCFPL in CT on reel and downhole CT are. The larger the annulus is, the lower the local DFCFPL in annulus is. So the local DFCFPL in CT is dominant in the circulating system. As for the different diameter CT, the total DFCFPL decreases linearly with the well depth increasing. In order to use the hydraulic energy rationally, 73.025mm diameter CT can be used to drill microhole with well depth less than 1000m, 60.325mm diameter CT should be used to drill microhole well depth of which is more than 1500m. This study can provide references for the CT selection and circulating hydraulic energy rational utilization design in MHD.

scholarly journals Research on Annular Frictional Pressure Loss of Hydraulic-Fracturing in Buckling Coiled Tubing

2018 ◽  
Vol 108 ◽  
pp. 032052
Author(s):  
Bin Liu ◽  
Meng Cai ◽  
Junliang Li ◽  
Yongquan Xu ◽  
Peng Wang
Keyword(s):  
Hydraulic Fracturing ◽  
Pressure Loss ◽  
Coiled Tubing
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