A sealing tool, system and method for sealing a wellbore achieves increased expansion with the use of a seal seat extender. In one example, a seal seat (e.g., a ball seat) defines an axial flow bore in fluid communication with the wellbore to be sealed, a sealing profile for receiving a loose sealing element (e.g., a ball or dart) to close the axial flow bore, and a tapered outer profile. The seal seat extender is initially disposed against the seal seat and is expandable against the seal seat in response to an axial setting force, such as by sliding up the tapered outer profile of the seal seat and/or buckling outwardly, in response to a setting force. A compliant annular packing element disposed against the seal seat extender is deformable outwardly into sealing engagement with the wellbore in response to the axial setting force.

A system includes an outer completion string, an inner service string configured to connect within the outer completion string, and an upper completion. The outer completion string includes at least one isolation packer, a sand control assembly and a gravel pack extension disposed uphole of a washdown shoe in a bottom-most well zone. In a top well zone, the outer completion string includes a latch profile, a female inductive coupler, a gravel pack packer, and a sand control assembly and a gravel pack extension disposed downhole of the gravel pack packer. The inner service string includes, among other components, an inner concentric string that is concentrically arranged within a workstring creating an inner-annulus between the workstring and the inner concentric string. The upper completion includes a male inductive coupler that is configured to connect with the female inductive coupler of the outer completion string.

A system includes an outer completion string, an inner service string configured to connect within the outer completion string, and an upper completion. The outer completion string includes at least one isolation packer, a sand control assembly and a gravel pack extension disposed uphole of a washdown shoe in a bottom-most well zone. In a top well zone, the outer completion string includes a latch profile, a female inductive coupler, a gravel pack packer, and a sand control assembly and a gravel pack extension disposed downhole of the gravel pack packer. The inner service string includes, among other components, an inner concentric string that is concentrically arranged within a workstring creating an inner-annulus between the workstring and the inner concentric string. The upper completion includes a male inductive coupler that is configured to connect with the female inductive coupler of the outer completion string.

A downhole packer system includes a swellable material configured to expand to seal against a wellbore wall in response to exposure to downhole fluids. The downhole packer system also includes at least one sensor disposed proximate the swellable material. The at least one sensor is configured to measure one or more electrical properties of the swellable material to determine a degree of expansion of the swellable material.

Methods for positioning an expandable metal sealing element in the wellbore. An example method includes an expandable metal sealing element having a reactive metal and disposed in a location. The method further includes actuating a washout prevention element, contacting the expandable metal sealing element with a fluid that reacts with the reactive metal to produce a reaction product having a volume greater than the reactive metal, and allowing the washout prevention element to prevent at least a portion of the reaction product from flowing away from the location.

Methods of capturing carbon dioxide in a wellbore can include installing a sealing element in the wellbore. The sealing element swells in the presence of carbon dioxide and can be used for capturing the carbon. The sealing element can include a carbon-swelling material, such as a carbon-swelling polymers, metal-based materials, or combinations of elastomeric polymers and metal-based materials. The sealing element can also include combinations of different carbon-swelling materials, fillers or other compounds, and materials that are not carbon swellable. The sealing element can create a seal, form an anchor, or create a seal and form an anchor in the wellbore after swelling.

The invention relates to downhole tools comprising members comprising branched poly(hydroxyacid) polymers provided with improved degradation rate when in contact with water.

The invention relates to downhole tools comprising members comprising branched poly(hydroxyacid) polymers provided with improved degradation rate when in contact with water.

A system for producing fluids from a wellbore extending from a well surface to a fluid-producing formation has a Y-tool installed in fluid communication with the tubing string placed in the wellbore. A pump, which may be an electric submersible pump (ESP), is installed in the Y-tool for lifting fluids from the formation to the surface. A blanking plug is positioned in the tubing string between the upper and lower connections of the Y-tool. A flushing port extends through a wall of the tubing string, positioned above and near the upper end of the blanking plug when in its operating position, and a flushing tube is located in the annular space between the tubing string and the wellbore casing. The flushing tube is in fluid communication with the flushing port and extends from the flushing port to the well surface. Flushing fluid is pumped downhole through the flushing tube to agitate and disperse any accumulated sand, scale and other particulate matter on top of the blanking plug.

A system for producing fluids from a wellbore extending from a well surface to a fluid-producing formation has a Y-tool installed in fluid communication with the tubing string placed in the wellbore. A pump, which may be an electric submersible pump (ESP), is installed in the Y-tool for lifting fluids from the formation to the surface. A blanking plug is positioned in the tubing string between the upper and lower connections of the Y-tool. A flushing port extends through a wall of the tubing string, positioned above and near the upper end of the blanking plug when in its operating position, and a flushing tube is located in the annular space between the tubing string and the wellbore casing. The flushing tube is in fluid communication with the flushing port and extends from the flushing port to the well surface. Flushing fluid is pumped downhole through the flushing tube to agitate and disperse any accumulated sand, scale and other particulate matter on top of the blanking plug.