Systems and methods for sealing a problem zone of a subterranean well include a wire mesh member with a tubular shape and a plurality of openings. The wire mesh member has an initial orientation with an initial outer diameter that is greater than an inner diameter of the wellbore, a reduced orientation with a reduced outer diameter that is less than the inner diameter of the wellbore and an induced bending stress, and an installed orientation with an installed outer diameter that is generally equal to the inner diameter of the wellbore and a residual bending stress. The wire mesh member is positioned within the problem zone and moved to the installed orientation so that an outer surface of the wire mesh member engages an inner surface of the wellbore. The plurality of openings are plugged to prevent a flow of fluid radially through the wire mesh member.

Systems and methods for sealing a problem zone of a subterranean well include a wire mesh member with a tubular shape and a plurality of openings. The wire mesh member has an initial orientation with an initial outer diameter that is greater than an inner diameter of the wellbore, a reduced orientation with a reduced outer diameter that is less than the inner diameter of the wellbore and an induced bending stress, and an installed orientation with an installed outer diameter that is generally equal to the inner diameter of the wellbore and a residual bending stress. The wire mesh member is positioned within the problem zone and moved to the installed orientation so that an outer surface of the wire mesh member engages an inner surface of the wellbore. The plurality of openings are plugged to prevent a flow of fluid radially through the wire mesh member.

A chemical reaction heat source for use in heaters used in down-hole applications is provided. The heat source has a fuel composition that comprises thermite and a damping agent. The use of the thermite mix enables the heaters of the present invention to generate hotter temperatures down wells. This in turn allows the use of Bismuth/Germanium alloys, which have higher melting points, to enable the production of plugs for the abandonment of deeper wells where subterranean temperatures are higher.

A chemical reaction heat source for use in heaters used in down-hole applications is provided. The heat source has a fuel composition that comprises thermite and a damping agent. The use of the thermite mix enables the heaters of the present invention to generate hotter temperatures down wells. This in turn allows the use of Bismuth/Germanium alloys, which have higher melting points, to enable the production of plugs for the abandonment of deeper wells where subterranean temperatures are higher.

A method of plugging a formation fracture includes drilling, with a drill string configured to flow drilling fluid, a wellbore, where, at a downhole location, the drilling fluid is lost through a formation fracture. The method also includes deploying, through the drill string, a plugging assembly to the downhole location of the wellbore. The plugging assembly includes a flexible fiber sheet releasably coupled to a pumpable dart such that when the plugging assembly reaches the downhole location, the flexible fiber sheet is released from the dart to flow, with the drilling fluid, to the formation fracture to at least partially overlay the formation fracture. The method also includes adding, to the drilling fluid, lost circulation material configured to accumulate on a portion of the flexible fiber sheet to at least partially fluidically plug the formation fracture.

A method for cementing a wellbore having a lost circulation zone includes installing a cement basket around a casing string having a casing diameter, and running and setting the casing string in the wellbore. The cement basket is set in proximity of and up hole from the lost circulation zone. The method includes pumping a cement slurry, through the casing string, to a first depth downhole from the cement basket, running a first tubing, having a tubing diameter, into an annulus between the casing string and the wellbore, and pumping the cement slurry, through the first tubing, to a second depth up hole from the cement basket. The tubing diameter is less than the casing diameter.

A method for cementing a wellbore having a lost circulation zone includes installing a cement basket around a casing string having a casing diameter, and running and setting the casing string in the wellbore. The cement basket is set in proximity of and up hole from the lost circulation zone. The method includes pumping a cement slurry, through the casing string, to a first depth downhole from the cement basket, running a first tubing, having a tubing diameter, into an annulus between the casing string and the wellbore, and pumping the cement slurry, through the first tubing, to a second depth up hole from the cement basket. The tubing diameter is less than the casing diameter.

A high expansion bridge plug comprising an elastomer element assembly and a control assembly for generating a compressive force against the elastomer element assembly. The elastomer element assembly comprises a first element stack and a second element stack with the first element stack comprising a first grouping of male and female elements and the second element stack comprising a second grouping of male and female elements. The compressive force generated causes the male element and the female element to expand and the female element to at least partially swallow the male element. The male and female elements can be conical shape, and an angle of a conical element can be between 5-25 degrees, and the length of the top female element is greater than the length of the middle or bottom male element.

Apparatuses, systems and methods for plugging a well bore. A plug formation apparatus includes a plug support tool having a substantially cylindrical and hollow body having one or more ports for fluid communication between an interior of the plug formation apparatus and an annulus of a well bore, a base extending radially around an outer surface of the body, and an elastically deformable member extending radially around an outer surface of the body beyond the base and supported by the base; a top-of-cement bypass sub having one or more ports, actuatable between a closed position and an open position; a detachment member coupled with the top-of-cement bypass sub; and a length of tubing fluidically coupled with an upper portion of the plug support tool and a lower portion of the top-of cement bypass sub.

Apparatuses, systems and methods for plugging a well bore. A plug formation apparatus includes a plug support tool having a substantially cylindrical and hollow body having one or more ports for fluid communication between an interior of the plug formation apparatus and an annulus of a well bore, a base extending radially around an outer surface of the body, and an elastically deformable member extending radially around an outer surface of the body beyond the base and supported by the base; a top-of-cement bypass sub having one or more ports, actuatable between a closed position and an open position; a detachment member coupled with the top-of-cement bypass sub; and a length of tubing fluidically coupled with an upper portion of the plug support tool and a lower portion of the top-of cement bypass sub.