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US 2019/0054523 A1Published application
Galvanically-Active In Situ Formed Particles for Controlled Rate Dissolving Tools
AssigneeTerves, LLC
InventorsDavid Wolf, Brian Doud
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AssigneeTerves, LLC
InventorsDavid Wolf, Brian Doud
Estimating the term…
A tastable, moldable, and/or extrudable structure using a metallic primary alloy. One or more additives are added to the metallic primary alloy so that in situ galvanically-active reinforcement particles are formed in the melt or on cooling from the melt. The composite contains an optimal composition and morphology to achieve a specific galvanic corrosion rate in the entire composite. The in situ formed galvanically-active particles can be used to enhance mechanical properties of the composite, such as ductility and/or tensile strength. The final casting can also be enhanced by heat treatment, as well as deformation processing such as extrusion, forging, or rolling, to further improve the strength of the final composite over the as-cast material.
A method of controlling the dissolution properties of a magnesium or a magnesium alloy comprising of the steps of:
A magnesium composite that includes in situ precipitation of galvanically-active intermetallic phases comprising a magnesium or a magnesium alloy and an additive constituting about 0.05-45 wt. % of said magnesium composite, said magnesium having a content in said magnesium composite that is greater than 50 wt. %, said additive forming metal composite particles or precipitant in said magnesium composite, said metal composite particles or precipitant forming said in situ precipitation of said galvanically-active intermetallic phases, said additive including one or more first additives having an electronegativity of greater than 1.5.
The magnesium composite as defined in 18, wherein said first additive includes one or more metals selected from the group consisting of copper, nickel, cobalt, bismuth, silver, gold, lead, tin, antimony, indium, arsenic, mercury, and gallium.
The magnesium composite as defined in 18, wherein said second additive includes one or more metals selected from the group consisting of calcium, strontium, barium, potassium, sodium, lithium, cesium, and the rare earth metals such as yttrium, lanthanum, samarium, europium, gadolinium, terbium, dysprosium, holmium, and ytterbium.
A dissolvable component for use in downhole operations that is fully or partially formed of a magnesium composite, said dissolvable component including a component selected from the group consisting of sleeve, frac ball, hydraulic actuating tooling, mandrel, slip, grip, ball, dart, carrier, tube, valve, valve component, plug, or other downhole well component, said magnesium composite includes in situ precipitation of galvanically-active intermetallic phases comprising a magnesium or a magnesium alloy and an additive constituting about 0.05-45 wt. % of said magnesium composite, said magnesium having a content in said magnesium composite that is greater than 50 wt. %, said additive forming metal composite particles or precipitant in said magnesium composite, said metal composite particles or precipitant forming said in situ precipitation of said galvanically-active intermetallic phases, said additive including one or more first additives having an electronegativity of greater than 1.5.
Dependencies are inferred from the claim text.