Abstract: A method includes introducing a first liquid composition into a well having a wellbore, introducing a second liquid composition into the well, and mixing the first and second liquid compositions within the well. The first liquid composition is kept separate from the second liquid composition until mixing the first and second liquid compositions within the well. Furthermore, the first liquid composition includes a first reactive component, the second liquid composition includes a second reactive component, and the first reactive component reacts with the second reactive component in response to mixing the first and second liquid compositions within the well. The method further includes causing the mixed compositions to engage the wellbore. In one example, the first reactive component may be an epoxy and the second reactive component may be a hardener that reacts with the epoxy to form a solid plug in the wellbore to seal off the well.

Abstract: A method includes deploying a solid epoxy material into a target region of a pipe and delivering a liquid epoxy formulation into the target region of the pipe so that the liquid epoxy formulation fills voids around the solid epoxy material and inside the pipe within the target region, wherein the liquid epoxy formulation cures within the voids to form a solid epoxy plug with the solid epoxy material within the target region of the pipe.

Abstract: A method includes introducing a first liquid composition into a well having a wellbore, introducing a second liquid composition into the well, and mixing the first and second liquid compositions within the well. The first liquid composition is kept separate from the second liquid composition until mixing the first and second liquid compositions within the well. Furthermore, the first liquid composition includes a first reactive component, the second liquid composition includes a second reactive component, and the first reactive component reacts with the second reactive component in response to mixing the first and second liquid compositions within the well. The method further includes causing the mixed compositions to engage the wellbore. In one example, the first reactive component may be an epoxy and the second reactive component may be a hardener that reacts with the epoxy to form a solid plug in the wellbore to seal off the well.

Abstract: A pump includes multiple piston chambers each including a piston, an inlet valve and an outlet valve. The pump further includes a first input conduit coupled to the inlet valve of each of a first subset of the piston chambers, a second input conduit coupled to the inlet valve of each of a second subset of the piston chambers, and one or more output conduit coupled to the outlet valve of each of the piston chambers. A mixed fluid stream may be formed by supplying a first fluid to the first subset of piston chambers, supplying a second fluid to a second subset of piston chambers, operating the pump to discharge the first fluid through the first subset of piston chambers and discharge the second fluid through the second subset of piston chambers, and combining the first fluid discharge and the second fluid discharge to form the mixed fluid stream.

Abstract: A method for abandonment of a subsea well includes: setting a packer of a lower cementing tool against a bore of an inner casing at a location adjacent to an outer casing; fastening a pressure control assembly (PCA) to the subsea wellhead; hanging an upper cementing tool from the PCA and stabbing the upper cementing tool into a polished bore receptacle of the lower cementing tool; perforating a wall of the inner casing below the packer; perforating the inner casing wall above the packer by operating a perforator of the upper cementing tool; and pumping cement slurry followed by a release plug through bores of the cementing tools. The release plug engages and launches a cementing plug from the lower cementing tool. The cementing plug drives the cement slurry through the perforations below the packer and into an inner annulus formed between the inner casing and the outer casing.

Abstract: A method for abandonment of a subsea well includes: setting a packer of a lower cementing tool against a bore of an inner casing at a location adjacent to an outer casing; fastening a pressure control assembly (PCA) to the subsea wellhead; hanging an upper cementing tool from the PCA and stabbing the upper cementing tool into a polished bore receptacle of the lower cementing tool; perforating a wall of the inner casing below the packer; perforating the inner casing wall above the packer by operating a perforator of the upper cementing tool; and pumping cement slurry followed by a release plug through bores of the cementing tools. The release plug engages and launches a cementing plug from the lower cementing tool. The cementing plug drives the cement slurry through the perforations below the packer and into an inner annulus formed between the inner casing and the outer casing.