Determination of basic calculation and experimental parameters of device for bore hole cleaning
O. Davydenko1, B. Ratov2, A. Ighnatov1
1Techniques Prospect of Deposits Department, National Mining University, Dnipropetrovsk, Ukraine
2Technology and Technique of Drilling Wells Department, Kazakh National Research Technical University named after К.I. Satpayev, Almaty, Republic of Kazakhstan
Min. miner. depos. 2016, 10(3):52-58
https://doi.org/10.15407/mining10.03.052
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ABSTRACT
Purpose. To substantiate the design and operating technological parameters of the device for the interval bore hole cleaning departing from the set dependences of active jets formation in the flow through the blade element.
Methods. Application of bench and analytical research techniques allowed to establish the fundamental principles of active jets formation in the flow through the blade element of the designed device and the nature of their impact on the processed objects.
Findings. Bench testing of the device for the interval bore hole cleaning resulted in defining aspects of the mechanism of active fluid jets formation. We studied the distribution of speed components in the workflow. The use of tilted surface for the formation of the blade profile has been justified. As a result of studying the physical model of the device working body, we received data regarding its structural design. Information about the peculiar hydrodynamics of the flow around the blade node with respect to the process of removing clay-mud agglomerates has been provided. The indicators of the effectiveness of the designed device were designated.
Originality. The steady flow through the blade element and consequently the removal of clay-mud agglomerates is provided by well-defined structural design characteristics which determine hydrodynamic aspects of the unit operation.
Practical implications. The results of laboratory and analytical studies are the base for designing the operating parameters of the process of preparing a bore hole for casing running and subsequent plugging of the bore hole with a guaranteed provision of high technical and economic indicators. Data for the study of the flow mode through the blade element are the basis for the hydrodynamic calculation of the device for the interval cleaning.
Keywords: bore hole, vugg, clay-mud agglomerates, device for cleaning, drilling fluid, active jet, flow rate
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