A variable stiffness engineered degradable ball or seal having a degradable phase and a stiffener material. The variable stiffness engineered degradable ball or seal can optionally be in the form of a degradable diverter ball or sealing element which can be made neutrally buoyant.

A variable stiffness engineered degradable ball or seal having a degradable phase and a stiffener material. The variable stiffness engineered degradable ball or seal can optionally be in the form of a degradable diverter ball or sealing element which can be made neutrally buoyant.

Provided is a magnesium alloy having a thermal conductivity of 75 W/m.Math.K or more and a high specific strength. One aspect of the present invention is a magnesium alloy containing a at. % of Al, b at. % of Ca, c at. % of Mn, and d at. % of D, with the remainder comprising Mg and unavoidable impurities. D has at least one of a rare-earth element (RE), Sn, Li, Zn, Ag, Be and Sc. The magnesium alloy does not contain Si and Sr. C mentioned above satisfies expression 1 below, d satisfies expression 2 below, and a and b are within a range enclosed by the solid line shown in FIG. 1. The thermal conductivity is 75 W/m.Math.K or greater.

0≤c≤0.1  (Expression 1)

0≤d≤1  (Expression 2)

Provided is a magnesium alloy having a thermal conductivity of 75 W/m.Math.K or more and a high specific strength. One aspect of the present invention is a magnesium alloy containing a at. % of Al, b at. % of Ca, c at. % of Mn, and d at. % of D, with the remainder comprising Mg and unavoidable impurities. D has at least one of a rare-earth element (RE), Sn, Li, Zn, Ag, Be and Sc. The magnesium alloy does not contain Si and Sr. C mentioned above satisfies expression 1 below, d satisfies expression 2 below, and a and b are within a range enclosed by the solid line shown in FIG. 1. The thermal conductivity is 75 W/m.Math.K or greater.

0≤c≤0.1  (Expression 1)

0≤d≤1  (Expression 2)

Wellbore isolation devices, methods of use, and downhole tools and systems comprising the wellbore isolation devices. A wellbore isolation device comprises a component selected from the group consisting of a mandrel, a packer element, a sealing ball, a wedge, a slip, a mule shoe, a wiper element, a wiper body, and any combination thereof; wherein the component comprises a degradable non-metallic material that degrades upon exposure to a wellbore environment; and wherein the degradable non-metallic material is a composite material comprising a non-epoxy matrix material and a reinforcing material.

Wellbore isolation devices, methods of use, and downhole tools and systems comprising the wellbore isolation devices. A wellbore isolation device comprises a component selected from the group consisting of a mandrel, a packer element, a sealing ball, a wedge, a slip, a mule shoe, a wiper element, a wiper body, and any combination thereof; wherein the component comprises a degradable non-metallic material that degrades upon exposure to a wellbore environment; and wherein the degradable non-metallic material is a composite material comprising a non-epoxy matrix material and a reinforcing material.

A 3DP preparation process of a high-strength rapid-dissolving magnesium alloy for an underground temporary plugging tool is disclosed by the present disclosure, comprising the following steps: 1) evenly mixing ingredients of material components; 2) importing the shape of a product needing to be printed into a computer control system, and printing alloy powder and glue in a 3D printer in an alternate spraying molding mode to obtain a blank with the needed shape; 3) drying the blank obtained in the step 2) and then carrying out degreasing and sintering in a protective atmosphere or vacuum; and 4) sintering the blank obtained in the step 3) at a high temperature of 570° C.-680° C. in the protective atmosphere or vacuum and then cooling to a room temperature.

Disclosed herein are magnesium alloys and methods of making and use thereof. The magnesium alloys comprise: from 1 to 1.5 wt % Zn, from 1 to 1.4 wt. % Al, from 0.2 to 0.7 wt % Ca, from 0.2 to 0.4 wt % Ce, from 0.1 to 0.8 wt % Mn, and the balance comprising Mg.

Disclosed herein are magnesium alloys and methods of making and use thereof. The magnesium alloys comprise: from 1 to 1.5 wt % Zn, from 1 to 1.4 wt. % Al, from 0.2 to 0.7 wt % Ca, from 0.2 to 0.4 wt % Ce, from 0.1 to 0.8 wt % Mn, and the balance comprising Mg.

The disclosure discloses a spinning process of a magnesium alloy wheel hub, which comprises the following steps: step 1, heating a magnesium alloy bar at 350-430° C. and keeping the temperature for 20 minutes; step 2, initially forging and forming on the bar under a forging press, wherein the forging down-pressing speed is 6-15 mm/s; step 3, finally forging and forming on the bar under a forging press, wherein the forging down-pressing speed is 5-8 mm/s; step 4, stress relief annealing on the final forged magnesium alloy blank; step 5, solid dissolving on the annealed magnesium alloy blank; step 6, taking out the solid-dissolved blank and directly spinning by a spinning machine; step 7, heating treatment and aging treatment. The magnesium alloy wheel hub with excellent performance is obtained by the process, and the spinning process and processing efficiency are greatly improved.