C - Chemistry – Metallurgy – 04 – B
Patent
C - Chemistry, Metallurgy
04
B
166/17, 259/35
C04B 7/30 (2006.01) C09K 8/05 (2006.01)
Patent
CA 1185231
ABSTRACT The invention is concerned with a method for preparing a body of plugging material of an alumina-base cement for in-situ cubic expansion on application of water thereto. The method of the invention comprises the steps of mechanically stirring dry alumina cement having dry additives of prerated quantities to improve the physical and mechanical characteristics of the plugging material, the stirring being effected by magnetized working bodies in an alternating electro- magnetic field, thereafter batch forming the stirred material into a body of determined shape conforming substantially to the body desired for in-situ applica- tion, and subsequently compressing the shaped body from all sides at a pressure of between 50 and 120 MN/m2 to obtain a further compacted body. The plugging material prepared in accordance with the invention has a greater degree of cubical expansion, improved compression strength and greater cohesion with rocks of borehole walls compared to materials prepared by conventional methods.
395656
Kovalenko Vitaly I.
Lipatov Nikolai K.
Nikolaev Nikolai I.
Tatevosian Ruben A.
Tereschenko Lev A.
Leningradsky Gorny Institut Imeni G.v. Plekhanova
Proizvodstvennoe Geologicheskoe Obiedinenie Tsentralnykh Raionov
Swabey Ogilvy Renault
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