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LOST CIRCULATION MATERIALS AND FORMATION CONTROL |
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| INTRODUCTION
Lost circulation differs from fluid loss in that fluid loss is the measure of cement filtrate lost to the formation, whereas lost circulation is the loss of the entire fluid/solid mixture. Lost circulation materials are inert plugging particulates which seal off high permeability thief zones or bridge off natural fractures. The four basic classes of lost circulation materials are; 1) Granular, 2) Laminar, 3) Semisolid, 4) Pliable. |
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Granular, inert lost circulation material/extender, low melting point Product Data Sheet |
Laminar flake, cellophane material, used at concentrations from 0.125 to 0.25 lb/sk. Product Data Sheet |
Granular, volcanic glass lost circulation material/extender Product Data Sheet |
Laminar, natural occurring mineral flake, used at concentrations from 0.25 To 1.0 lb/sk |
Granular, inert lost circulation material/extender, high melting point Product Data Sheet |
Pliable, ground rubber lost circulation material |
Semi-solid, select formation control process, permanent rigid-gel control of large thief zones and underground aquafers Product Data Sheet
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Cement Additives and Specialty Products
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Last modified: November 15, 2004