SAND CONTROL SCREEN HAVING IMPROVED RELIABILITY

摘要

A sand control device (800) is used for restricting the flow of particles from a subsurface formation into a tubular body (830p) within a wellbore during production operations. The sand control device is divided into compartments along its length that provide redundancy for particle filtration. Each compartment first comprises a base pipe (830b, p). The base pipe defines an elongated tubular body having a permeable section (830p) and an impermeable section (830b) within each compartment. Each compartment also comprises a first filtering conduit (810) and a second filtering conduit (820). The filtering conduits comprise filtering media and generally circumscribe the base pipe (830b, p). The filtering conduits (810,820) are arranged so that the first filtering conduit (810) is adjacent to the non- permeable section (830b) of the base pipe, while the second filtering conduit (820) is adjacent to the permeable section (830p) of the base pipe.