Thus, standard 4.2 API Barite is about 15% impurities. Typical drilling fluids solids consist primarily of Barite, Barite impurities, drill solids, LCM and other solid products. For Barite weighted fluid systems the typical ASG is 3.8 to 4.1. The relative density of all the solids that make up the drilling fluid. Increasing the pump rate tends to improve cuttings transport but also increases down hole pressure or ECD. Increasing the pump rate increases the annular velocity. Table 1 Rheology and Hydraulics Terminolgy Term Annular Velocityĭefinition The average velocity of a fluid as it moves through an annular section in the wellbore. Some of these terms are common to programs like DFG hydraulics modeling software. The terms and definitions in the following table are fundamental to the discussion of rheology and hydraulics in drilling operations. Understand some principles of hydraulics and wellbore pressure managementĢ BAROID FLUIDS HANDBOOK © 2012 Halliburton All Rights Reserved #SLATE DIGITAL FREE ML TO OZ SOFTWARE#Understand the language of rheology Understand the physical meaning of the language terms Understand why detailed software inputs are sometimes needed. Public domain equations and methods are readily available in the publication API Recommended Practices 13D available at The key objectives to learning about rheology are as follows: Basic rheological equations are addressed in Halliburton software packages such as DFG, WellPlan and ICem, which perform calculations and hydraulics predictions. Basic knowledge of the common language and terms used to discuss rheology is a key component to understanding how and why rheology is important. Knowledge of certain rheological terms, principles, and commonly used rheological models is necessary to gain a fundamental understanding of rheology and its impact on field operations. The field engineer must understand how these can impact and drive field operations. Each of these has its own rheological complexity that must be understood to maximize drilling success and minimize non-productive time (NPT). These fluid types represent the wide range of rheologically complex and diverse materials that are encountered daily. Examples include liquids such as brine completion fluids suspensions, such as barite weighted drilling fluids and cements that react with time, temperature and chemistry. In the oilfield this science is typically focused on liquids or particulate suspensions. Rheology is the study and science of flowing matter. 13ġ BAROID FLUIDS HANDBOOK © 2012 Halliburton All Rights Reserved 3įigures Figure 1 Typical Rheological Profiles for Newtonian, Bingham-Plastic Fluids, Power Law Fluids, and Newtonian Fluids. Tables Table 1 Rheology and Hydraulics Terminolgy. Sales of Halliburton products and services will be in accord solely with the terms and conditions contained in the contract between Halliburton and the customer that is applicable to the sale. Halliburton personnel will use their best efforts in gathering such information and their best judgment in interpreting it, but Customer agrees that Halliburton shall not be liable for and Customer SHALL RELEASE, DEFEND AND INDEMNIFY Halliburton against any damages or liability arising from the use of such information even if such damages are contributed to or caused by the negligence, fault or strict liability of Halliburton.ġ0 Lost Circulation and Wellbore Stress Management 11 Solids Control 12 Stuck Pipe 13 Well Control 14 Corrosion 15 Foam and Aerated Drilling 16 Troubleshooting 17 DFG Hydraulics Modeling Software 18 Digital Solutions 19 Tables, Charts and Calculations 20 Useful Linksġ0/12 © 2012 Halliburton. Disclaimer Because of the uncertainty of variable well conditions the necessity of relying on facts and supporting services furnished by others, Halliburton IS UNABLE TO GUARANTEE THE EFFECTIVENESS OF THE PRODUCTS, SUPPLIES OR MATERIALS, NOR THE RESULTS OF ANY TREATMENT OR SERVICE, NOR THE ACCURACY OF ANY CHART INTERPRETATION, RESEARCH ANALYSIS, JOB RECOMMENDATION OR OTHER DATA FURNISHED BY Halliburton.
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