Permanent anchor for use with through tubing bridge plug

A bridge plug assembly adapted to be placed in a tubular member well to isolate and controllably block fluid flow thereacross, the assembly comprising:

• (a) an elongate flow pipe;
• (b) valve means at the top end of said flow pipe;
• (c) double pivot, three link toggle means supported by said flow pipe for expansion to engage a surrounding well tubular member;
• (d) upwardly foacing basket means supported by said flow pipe having:
• (1) a closed and collapsed position around said flow pipe;
• and
• (2) an expanded position facing upwardly to receive curable materials therein;
• (e) said flow pipe and said valve means defining a flow path from below said basket means to above said basket means wherein said valve means opens or closes the flow path;
• and
• (f) first and second co-acting mean supported by said flow path for telescoping movement therebetween for
• (1) expanding said toggle means to engage the well tubular member;
• (2) expanding said basket means;
• and
• (3) opening said valve means.

A method of placing a concrete plug in a tubular member which is located in a well so that well fluids are blocked by the plug and where such well fluids interfere with curing of the concrete plug, the method comprising the steps of:

• (a) running into the cased well an elongate bridge plug assembly having an upwardly facing basket with a retracted position and an expanded position adapted to receive and hold curable material for forming a concrete plug;
• (b) setting the bridge plug assembly at a desired depth in the cased well by expanding a double pivot, three link toggle means having plural articulated serrated teeth adapted to engage the well tubular member to support the bridge plug assembly against pressure from above or below in the surrounding well tubular member, wherein said toggle means pivots at said pivots to grippingly engage the well tubular member;
• (c) operating the bridge plug assembly basket to an expanded position;
• (d) placing curable materials in the upwardly facing basket and curing the materials to form concrete;
• (e) during curing, forming a well fluid flow path across the bridge plug assembly, the flow path utilizing an upstanding flow pipe selectively opened and closed by a valve means at the upper end thereof;
• (f) during curing of the curable materials to form concrete, opening the valve means to enable fluid flow along the flow path;
• (g) after curing, closing the valve means to prevent fluid flow along the flow path, thereby completely plugging the cased well;
• (h) placing an expandable toggle means immediately above the bridge plug;
• (i) expanding the toggle means to grip the well;
• (j) placing additional curable materials above the bridge plug to fully surround the toggle means so that, after curing, the concrete plug encases the toggle means.