E - Fixed Constructions – 21 – B
Patent
E - Fixed Constructions
21
B
166/70
E21B 43/10 (2006.01)
Patent
CA 1202891
Abstract Method of limiting sand production in wells The co-production of sand in wells, for example in oil wells, gas wells or water wells, is limited by locating in the well, in the region of that part of the surrounding formation from which the sand arises, a permeable metal tube which has pores providing a tortuous path through the tube.
420817
Ballantyne Donald G.
Imperial Chemical Industries Plc
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