E - Fixed Constructions – 21 – B
Patent
E - Fixed Constructions
21
B
E21B 37/04 (2006.01) E21B 37/10 (2006.01)
Patent
CA 2404894
One or more brush bodies (20) fabricated from an incompressible material, for example, from high density polyurethane, high density polyethylene, high density polypropylene, nylon, Orlon, high density plastics, phenolic resin-based materials hard rubber, wood, aluminum, or other easily drillable metals, are connected to, or integrally fabricated with one or more elastomeric, conventional cement plugs (30), and are pumped down within the interior of oilfield casing (76) situated within an earth borehole, to minimize or eliminate the need to run a workstring of drillpipe and drill bit to clean out the interior of the string of casing (76).
L'invention porte sur un ou plusieurs corps de brosse (20) faits d'un matériau incompressible, par exemple du polyuréthane à forte densité, du polyéthylène à forte densité, du polypropylène à forte densité, du Nylon, de l'Orlon, des plastiques à forte densité, du caoutchouc dur à base de résines phénoliques, du bois, de l'aluminium, ou autres matériaux facilement perçables, et fixés à, ou formés d'une seule pièce avec, un ou plusieurs obturateur (30) d'un ciment aux élastomères usuel, puis pompés au fond du tubage d'un forage. On réduit ou élimine ainsi la nécessité de descendre un train de tiges et un trépan pour nettoyer l'intérieur du tubage (76).
Finlayson & Singlehurst
M-I L.l.c.
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