Wellbore isolation method for sequential treatment of zone sections with and without milling

A method for sequential isolation of portions of a tubular string for treatment of a surrounding formation, comprising:

• deploying at least one annularly shaped support in the tubular string, said support extending in part into a passage through the tubular string;
• releasing mechanical potential energy stored within a structure defining said at least one annularly shaped support to allow supporting contact of said at least one annularly shaped support with the tubular string;
• placing at least one object on said at least one support;
• treating the surrounding formation with pressure applied in the tubular string above said object;
• removing said at least one object from said at least one support to leave said passage substantially open for subsequent production;
• providing a plurality of supports as said at least one support;
• providing a plurality of objects as said at least one object;
• installing a first said support in said tubular string and a first said object on said first support;
• treating a first location above said first object;
• locating a second said support in said tubular string and a second object on said second support to isolate said first location;
• treating a second location with said first location isolated;
• non-interventionally removing said first and said second objects from said first and said second supports;
• producing through openings in said supports.

A method for sequential isolation of portions of a tubular string for treatment of a surrounding formation, comprising:

• deploying at least one annularly shaped support in the tubular string, said support extending in part into a passage through the tubular string;
• placing at least one object on said at least one support;
• treating the surrounding formation with pressure applied in the tubular string above said object;
• removing said at least one object from said at least one support to leave said passage substantially open for subsequent production;
• providing a plurality of supports as said at least one support;
• making said supports adaptive seats that are circular in nature and adjust in diameter without permanently deforming;
• providing a plurality of objects as said at least one object;
• installing a first said support in said tubular string and a first said object on said first support;
• treating a first location above said first object;
• locating a second said support in said tubular string and a second object on said second support to isolate said first location;
• treating a second location with said first location isolated;
• non-interventionally removing said first and said second objects from said first and said second supports;
• producing through openings in said supports.