Hole Cleaning and Pressure Loss Prediction From a Bulk Transport Perspective

2005 ◽  
Author(s):  
Biplab Kumar Datta ◽  
Chandana Ratnayake ◽  
Arild Saasen ◽  
Tor Henry Omland
Keyword(s):  
Pressure Loss ◽  
Hole Cleaning ◽  
Loss Prediction ◽  
Bulk Transport

Ultra high speed investigation of gaseous jet injected by a single-hole injector and proposing of an analytical method for pressure loss prediction during transient injection

Fuel ◽  
2016 ◽  
Vol 184 ◽  
pp. 100-109 ◽  
Author(s):  
Alireza Hajialimohammadi ◽  
Daniel Edgington-Mitchell ◽  
Damon Honnery ◽  
Nader Montazerin ◽  
Amir Abdullah ◽  
...  
Keyword(s):  
Analytical Method ◽  
Pressure Loss ◽  
High Speed ◽  
Single Hole ◽  
Ultra High Speed ◽  
Loss Prediction

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.

Research Progresses of Hydraulics for Extended Reach Drilling in China, Part I: Cuttings Transport and Precise Calculation of Pressure Loss

2012 ◽  
Vol 524-527 ◽  
pp. 1557-1560
Author(s):  
Xiao Le Guo ◽  
Zhi Ming Wang ◽  
Zhi Hui Long
Keyword(s):  
Pressure Loss ◽  
Optimization Method ◽  
Calculation Model ◽  
Cuttings Transport ◽  
Monitoring Method ◽  
Hole Cleaning ◽  
Design And Optimization ◽  
Precise Calculation ◽  
System Pressure ◽  
Extended Reach Drilling

The extended reach drilling (ERD) is being adopted widely as an effective and economical way of developing oilfields in China. But it also brought a series of technical difficulties because of its own characteristics. Some progresses were made after several years of hard work in China about Hydraulics for extended reach drilling, which included cuttings transport models and rules, precise model of circulating system pressure loss calculation, hole cleaning calculating models and monitoring method, hydraulic extended limit calculation model and analysis, hydraulics design and optimization method for ERD. Based on the above studies, the author finally developed a system of hole cleaning monitoring and hydraulics design and its risk analysis which could provide theoretical support and useful tool for engineering design and risk assess before drilling. These researches are helpful to ERD and have enriched the hydraulic theory of ERD. Due to space limitations, this article could only demonstrate part of these progresses, as the subtitle showed.

Review on the aerodynamics of intermediate compressor duct

2020 ◽  
Vol 14 (4) ◽  
pp. 7446-7468
Author(s):  
Manish Sharma ◽  
Beena D. Baloni
Keyword(s):  
High Pressure ◽  
Pressure Loss ◽  
Flow Analysis ◽  
Outer Wall ◽  
Optimization Techniques ◽  
Optimum Pressure ◽  
Research Areas ◽  
Static Pressure Distribution ◽  
High Pressure Compressor ◽  
Pressure Compressor

In a turbofan engine, the air is brought from the low to the high-pressure compressor through an intermediate compressor duct. Weight and design space limitations impel to its design as an S-shaped. Despite it, the intermediate duct has to guide the flow carefully to the high-pressure compressor without disturbances and flow separations hence, flow analysis within the duct has been attractive to the researchers ever since its inception. Consequently, a number of researchers and experimentalists from the aerospace industry could not keep themselves away from this research. Further demand for increasing by-pass ratio will change the shape and weight of the duct that uplift encourages them to continue research in this field. Innumerable studies related to S-shaped duct have proven that its performance depends on many factors like curvature, upstream compressor’s vortices, swirl, insertion of struts, geometrical aspects, Mach number and many more. The application of flow control devices, wall shape optimization techniques, and integrated concepts lead a better system performance and shorten the duct length.  This review paper is an endeavor to encapsulate all the above aspects and finally, it can be concluded that the intermediate duct is a key component to keep the overall weight and specific fuel consumption low. The shape and curvature of the duct significantly affect the pressure distortion. The wall static pressure distribution along the inner wall significantly higher than that of the outer wall. Duct pressure loss enhances with the aggressive design of duct, incursion of struts, thick inlet boundary layer and higher swirl at the inlet. Thus, one should focus on research areas for better aerodynamic effects of the above parameters which give duct design with optimum pressure loss and non-uniformity within the duct.

Sign in / Sign up

Export Citation Format

Share Document