首页>
外国专利>
PEMASANGAN CASING SUMUR DENGAN PERLINDUNGAN EROSI UNTUK SARINGAN DALAM
PEMASANGAN CASING SUMUR DENGAN PERLINDUNGAN EROSI UNTUK SARINGAN DALAM
展开▼
机译:为内部滤清器安装防腐蚀套管
展开▼
页面导航
摘要
著录项
相似文献
摘要
Well casing assembly for use in oil and gas wells, and especially deviated or horizontal wells, has an inner pipe member with threaded ends which permit a number of casing assemblies to be joined in a string. The inner pipe has a series of perforations along a segment of its length which are covered by an elongated screen member which prevents the passage of sand particles. A concentric outer protective cover member is devoid of perforations in regions which are radially opposite the inner screen to prevent damage to the screen. One or more perforated segments of the outer member are axially spaced from the screen member so that inward flow from a formation will have its energy and velocity reduced before it reaches the screen, thereby minimizing erosion of the screen surface. If desired, perforated flow control devices such as annular rings can be located between the inner pipe and outer member at the ends of the screen segment to allow a more uniform flow to the screen, and thus further reduce erosion.
展开▼