Recovering lost circulation in wells
First Claim
4. THE METHOD OF RECOVERING LOST CIRCULATION IN A WELL WHICH INCLUDES INTRODUCING INTO THE WELL AND TRANSMITTING TO THE LOCATION WHERE CIRCULATION IS BEING LOST, A PUMPABLE AQUEOUS MIXTURE CONTAINING HYDRATABLE CLAY MATERIAL AND AN INHIBITOR DESIGNED TO RENDER THE MATERIAL TEMPORARILY HYDROPHOBIC, AND AN ACCELERATOR DESIGNED TO COUNTERACT AND A SUFFICIENT QUANTITY TO COUNTERACT THE EFFECT OF THE INHIBITOR AND RENDER THE CLAY MATERIAL HYDROPHILIC THE ACCELERATOR BEING IN A FORM SUCH THAT ITS EXPOSED SURFACE IS SMALL PER UNIT OF VOLUME, TRANSMITTING THESE CIRCUMSTANCES TO THE LOCATION WHERE CIRCULATION IS BEING LOST AND ALLOWING WELL CONDITIONS TO BECOME STATIC WHEREBY NO GREAT VOLUME OF THE ACCELERATOR WILL BE DISSOLVED OR DISPERSED DURING TRANSIT BUT WITH THE PASSAGE OF TIME, WHILE
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Citations
4 Claims
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4. THE METHOD OF RECOVERING LOST CIRCULATION IN A WELL WHICH INCLUDES INTRODUCING INTO THE WELL AND TRANSMITTING TO THE LOCATION WHERE CIRCULATION IS BEING LOST, A PUMPABLE AQUEOUS MIXTURE CONTAINING HYDRATABLE CLAY MATERIAL AND AN INHIBITOR DESIGNED TO RENDER THE MATERIAL TEMPORARILY HYDROPHOBIC, AND AN ACCELERATOR DESIGNED TO COUNTERACT AND A SUFFICIENT QUANTITY TO COUNTERACT THE EFFECT OF THE INHIBITOR AND RENDER THE CLAY MATERIAL HYDROPHILIC THE ACCELERATOR BEING IN A FORM SUCH THAT ITS EXPOSED SURFACE IS SMALL PER UNIT OF VOLUME, TRANSMITTING THESE CIRCUMSTANCES TO THE LOCATION WHERE CIRCULATION IS BEING LOST AND ALLOWING WELL CONDITIONS TO BECOME STATIC WHEREBY NO GREAT VOLUME OF THE ACCELERATOR WILL BE DISSOLVED OR DISPERSED DURING TRANSIT BUT WITH THE PASSAGE OF TIME, WHILE
Specification
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Current AssigneeArthur L. Armentrout
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Original AssigneeArthur L. Armentrout
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InventorsArmentrout, Arthur L.
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Application NumberUS03/638,100Time in Patent Office1,891 DaysField of SearchUS Class Current166/292CPC Class CodesC09K 8/5045 containing inorganic compoundsY10S 507/902 Controlled release agent
