DRILLING HYDRAULICS PROGRAM MANUAL
DRILLING HYDRAULICS PROGRAM SOFTWARE

optimize the energy used at the mud pumps. One of the effective steps towards reducing operating cost is to have a well designed drilling hydraulics program that will. Good hole cleaning results in an increase in penetration rate and, at the same time, reduces the operating drilling cost.

Abstract Bottom hole cleaning is an important function of drilling fluid that needs special attention during a drilling operation.

If there are formations with small differences in the fracture and pore pressure gradients, then these variations in ECD could cause well control problems. Comparing the ECD predictions with those calculated where the mud rheology is independent of temperature and pressure, the ECD was found to be underestimated by up to 6.1% for a SBM and overestimated by 3.1% for a WBM.

DRILLING HYDRAULICS PROGRAM SOFTWARE

The effect of the cold fluid viscosity in the riser on ECD for deepwater wells was assessed using a software model which uses a transient temperature simulator in conjunction with a hydraulic model which accounts for different mud viscosity throughout the wellbore. For the different WBM systems, the Herschel-Bulkley model also fitted the salt/polymer fluids and unweighted bentonite-based fluid rheologies, however, the Casson model best described the weighted bentonite-based fluid rheologies. The Herschel-Bulkley and Casson models both fitted the OBM and SBM rheograms very well. The rheology of eighteen different drilling fluids covering WBM, OBM and SBM have been evaluated between -1В° to 90вЊ and 1 to. This paper extends the data available to cold temperature regimes which can be expected to occur in the riser for deepwater wells. Previous rheological studies of water-base and oil-base muds have concentrated on fluid viscosities at elevated temperatures and pressures. The timely availability of the information enables the mud engineer and drilling engineer to aware the status and trends of the downhole conditions and improve efficiency in decision making. It also delivers surge and swab pressure calculation as well as ECD data while tripping drill pipe or setting casing. The drilling fluids performance diagnosis and hydraulics modeling provides not only rheological mode identification but also the real time equivalent circulating density ECD and equivalent static density ESD at any point in the wellbore during drilling.

DRILLING HYDRAULICS PROGRAM MANUAL

The indoor and field pilot tests showed that the unit is capable of measuring fluid properties such as mud density, funnel viscosity, rheological behavioral parameters, calcium and chlorine concentration and so on properly and accurately while drilling compared with manual measurement by lab operators. The test data is stored in the database of well-site digital platform and shared to the Remote Operational Centers (ROCs) for drilling fluids performance diagnosis and downhole hydraulics modeling

During working, the fluid sample is sucked in and flowed first to the Density module, tested there and then flowed to other modules in above order and finally discharged into waste pits without any human intervention. The ODFPLS unit consists of four testing modules, they are Density module, Rheology module, Funnel Viscosity module, and Ion Content module. In this paper, we present a novel unit called On вЂ“line Drilling Fluids Properties Logging System (ODFPLS) for real-time measurement of drilling fluids property and software for downhole hydraulics modeling by integrating of these real-time measured data. However, the drilling fluids properties are generally taken once every regulated interval and the downhole wellbore conditions and drilling fluids performance are judged accordingly and sometimes experientially for lack of updated data. Continuously monitoring of drilling fluid properties and simulating of down hole hydraulics is critical and beneficial for safe and efficient drilling.

Drilling hydraulics program