Expandable metal gas lift mandrel plug
Disclosed herein are aspects of a gas lift mandrel plug for use in a wellbore. In one embodiment, a gas lift mandrel plug may comprise an elongate member having a proximal end and a distal end, wherein the elongate member comprises a metal sealant configured to expand in response to hydrolysis, and wherein the elongate member is configured to seal a side pocket of a wellbore tubular in response to hydrolysis.
1 . A gas lift mandrel plug for use in a wellbore, comprising:
an elongate member having a proximal end and a distal end;
wherein the elongate member comprises a body of monolithic metal sealant configured to expand in response to hydrolysis, the body of monolithic metal sealant having a length substantially greater than a width; and
wherein the expanded metal elongate member is configured to seal against an internal diameter of a side pocket of a wellbore tubular in response to hydrolysis, and further wherein during the expansion, the body of monolithic metal sealant is configured to go from metal to micron-scale particles that are larger and lock together.
2 . The gas lift mandrel plug according to claim 1 , wherein the distal end is tapered.
3 . The gas lift mandrel plug according to claim 1 , wherein the proximal end includes an intervention tool connector.
4 . The gas lift mandrel plug according to claim 3 , wherein the intervention tool connector is threadedly attached with the elongate member.
5 . The gas lift mandrel plug according to claim 3 , wherein the intervention tool connector forms an integral part of the elongate member.
6 . The gas lift mandrel plug according to claim 1 , wherein the elongate member is a cylindrical member, and further wherein a ratio of a length (l) to width (w) of the cylindrical member ranges from 12 to 1 to 14 to 1.
7 . The gas lift mandrel plug according to claim 1 , wherein a length (l) of the elongate member is less than 700 mm.
8 . The gas lift mandrel plug according to claim 1 , wherein the metal sealant is configured to expand in response to one of magnesium hydrolysis, aluminum hydrolysis, calcium hydrolysis, and calcium oxide hydrolysis.
9 . The gas lift mandrel plug according to claim 1 , wherein the metal sealant is a magnesium alloy alloyed with at least one of Al, Zn, Mn, Zr, Y, Nd, Gd, Ag, Ca, Sn, and Re.
10 . The gas lift mandrel plug according to claim 1 , further comprising a swellable rubber element placed radially about the elongate member.
11 . A well system, comprising:
a wellbore tubular;
a side pocket located within the wellbore tubular;
a gas lift mandrel plug positioned in and sealing the side pocket, the gas lift mandrel plug comprising:
an elongate member having a proximal end and a distal end, wherein the proximal end is configured to connect with an intervention tool; and
wherein the elongate member comprises a body of monolithic metal sealant configured to expand in response to hydrolysis, the body of monolithic metal sealant having a length substantially greater than a width, and further wherein during the expansion, the body of monolithic metal sealant is configured to go from metal to micron-scale particles that are larger and lock together.
12 . The well system according to claim 11 , wherein the distal end of the elongate member is tapered.
13 . The well system according to claim 11 , wherein the proximal end includes an intervention tool connector comprising a material that does not expand in response to hydrolysis.
14 . The well system according to claim 11 , further comprising a swellable rubber element placed radially about the elongate member.
15 . A method of using a gas lift mandrel plug in a well system, the method comprising:
removing a gas lift valve from a side pocket located within a wellbore tubular;
positioning a gas lift mandrel plug into the side pocket, the gas lift mandrel plug comprising an elongate member having a proximal end and a distal end, wherein the proximal end is configured to connect with an intervention tool;
wherein the elongate member comprises a body of monolithic metal sealant configured to expand in response to hydrolysis, the body of monolithic metal sealant having a length substantially greater than a width; and
wherein the elongate member is configured to seal a side pocket of a downhole casing in response to hydrolysis, and further wherein during the expansion, the body of monolithic metal sealant is configured to go from metal to micron-scale particles that are larger and lock together.
16 . The method as recited in claim 15 , further including subjecting the gas lift mandrel plug to a hydrolysis fluid, the hydrolysis fluid expanding the elongate member to seal the side pocket.
17 . The method as recited in claim 15 , wherein the metal sealant is configured to expand in response to one of magnesium hydrolysis, aluminum hydrolysis, calcium hydrolysis, and calcium oxide hydrolysis.
18 . The method of claim 15 wherein hydrolysis forms a structure comprising one of a Brucite, Gibbsite, bayerite, and norstrandite.
19 . The method as recited in claim 15 , wherein the metal sealant is a magnesium alloy alloyed with at least one of Al, Zn, Mn, Zr, Y, Nd, Gd, Ag, Ca, Sn, and Re.