Papers by Keyword: Deposit Removal

Abstract: The crude oil of H oilfield contains wax and asphaltenes, and the formation water salinity is up to 160000-220000mg/l, so there is a tendency that the asphaltenes and scale will be deposited in the wellbore during the course of well production, which will influence the normal production greatly. It is necessary to make clear the sedimentary law and corresponding measures. The content of organic and inorganic of wellbore deposits of H oilfield is analyzed through a series of laboratory tests. On the base of the test results, integrated with comparison of conventional deposit prevention and removal technologies, chemical and mechanical methods are recommended. Moreover, formulation of the acid cleaning agent is determined and the principle and process of mechanical removal method is presented.

Abstract: Electrophoretic deposition is a promising method for the near net shaping of ceramics if deposit damage during removal from the electrode can be prevented. The latter can be achieved by providing a lubricated interface between electrode and deposit. During application of such a lubricant care must be taken that none of the electrode surface details are lost. Hence thins layers which closely represent the original electrode surface are needed. In the present work electrophoretic deposition of alumina powder on a thin layer of ionic liquid applied on polymer electrodes is described. After deposition this ionic liquid layers serves as a shear plane during the deposit removal. The resulting deposits exhibit a smooth surface quality and high green density. Furthermore experiments show that the ionic liquid can be used as a means for producing electrodes with areas at which deposition is locally prevented.