Multilateral junction assembly employing degradable material

1 . A multilateral junction assembly, comprising:

a transition sleeve assembly, the transition sleeve assembly including a transition sleeve body having a sidewall opening in a sidewall thereof, the sidewall opening configured to align with a main wellbore when the transition sleeve assembly is at least partially insert within a lateral wellbore; and

a metal based degradable material positioned on a radial surface of the transition sleeve body covering the sidewall opening, the degradable material configured to degrade over time and uncover the sidewall opening, further including an expandable metal anchor positioned on a radial exterior surface of the transition sleeve uphole and downhole of the sidewall opening, the expandable metal anchor including a metal configured to expand in response to hydrolysis to axially and rotationally fix the transition sleeve assembly within the lateral wellbore, wherein the metal based degradable material is expandable metal configured to expand in response to hydrolysis and then degrade to uncover the sidewall opening, and further wherein the layer of expandable metal and the metal based degradable material are a single unitary layer of expandable metal including the metal configured to expand in response to hydrolysis, the single unitary layer of expandable metal configured to degrade around the sidewall opening and form an expanded metal anchor outside of the sidewall opening.

2 . The multilateral junction assembly as recited in claim 1 , wherein the expandable metal anchor is configured to engage with the lateral wellbore and the main wellbore to form at least a part of a Level-5 junction.

3 . The multilateral junction assembly as recited in claim 1 , further including first and second end rings on opposing ends of the single unitary layer of expandable metal.

4 . The multilateral junction assembly as recited in claim 1 , further including a multilateral lateral bore completion coupled to a downhole end of the transition sleeve assembly, the multilateral lateral bore completion including:

a tubular having a first end and a second end;

first and second packers located on a radial exterior surface of the tubular, the first and second packers configured to move from a radially retracted state to a radially extended state to engage with a wellbore tubular and separate the tubular into first and second production zones; and

a first interval control valve located in the tubular in the first production zone and a second interval control valve located in the tubular in the second production zone.

5 . The multilateral junction assembly as recited in claim 4 , further including an orientation feature coupled to the transition sleeve body within 5 m uphole or downhole of the sidewall opening, the orientation feature configured to provide proper orientation and space out of the transition sleeve assembly.

6 . The multilateral junction assembly as recited in claim 5 , wherein the orientation feature is a collet finger.

7 . The multilateral junction assembly as recited in claim 6 , further including an orientation device coupled to an uphole end of the transition sleeve body, the orientation device configured to engage with a separate uphole device to rotationally orient the separate uphole device within the main wellbore.

8 . The multilateral junction assembly as recited in claim 7 , further including a control line coupler located on the transition sleeve body between the orientation device and the sidewall opening.

9 . The multilateral junction assembly as recited in claim 8 , wherein the control line coupler is an inductive coupler.

10 . The multilateral junction assembly as recited in claim 8 , wherein the control line coupler is a wet mate coupler.

11 . A well system, comprising:

a main wellbore located within a subterranean formation;

a lateral wellbore extending from the main wellbore; and

a multilateral junction assembly located at a junction between the main wellbore and lateral wellbore, the multilateral junction assembly at least partially insert within the lateral wellbore, the multilateral junction assembly including:

a transition sleeve assembly, the transition sleeve assembly including a transition sleeve body having a sidewall opening in a sidewall thereof, the sidewall opening configured to align with a main wellbore when the transition sleeve assembly is at least partially insert within a lateral wellbore; and

a metal based degradable material positioned on a radial surface of the transition sleeve body covering the sidewall opening, the degradable material configured to degrade over time and uncover the sidewall opening, further including an expandable metal anchor positioned on a radial exterior surface of the transition sleeve uphole and downhole of the sidewall opening, the expandable metal anchor including a metal configured to expand in response to hydrolysis to axially and rotationally fix the transition sleeve assembly within the lateral wellbore, wherein the metal based degradable material is expandable metal configured to expand in response to hydrolysis and then degrade to uncover the sidewall opening, and further wherein the layer of expandable metal and the metal based degradable material are a single unitary layer of expandable metal including the metal configured to expand in response to hydrolysis, the single unitary layer of expandable metal configured to degrade around the sidewall opening and form an expanded metal anchor outside of the sidewall opening.

12 . The well system as recited in claim 11 , wherein the expandable metal anchor is configured to engage with the lateral wellbore and the main wellbore to form at least a part of a Level-5 junction.

13 . The well system as recited in claim 11 , further including first and second end rings on opposing ends of the single unitary layer of expandable metal.

14 . The well system as recited in claim 11 , further including a multilateral lateral bore completion coupled to a downhole end of the transition sleeve assembly, the multilateral lateral bore completion including:

a tubular having a first end and a second end;

first and second packers located on a radial exterior surface of the tubular, the first and second packers configured to move from a radially retracted state to a radially extended state to engage with a wellbore tubular and separate the tubular into first and second production zones; and

a first interval control valve located in the tubular in the first production zone and a second interval control valve located in the tubular in the second production zone.

15 . The well system as recited in claim 14 , further including an orientation feature coupled to the transition sleeve body within 5 m uphole or downhole of the sidewall opening, the orientation feature configured to provide proper orientation and space out of the transition sleeve assembly.

16 . The well system as recited in claim 15 , wherein the orientation feature is a collet finger.

17 . The well system as recited in claim 16 , further including an orientation device coupled to an uphole end of the transition sleeve body, the orientation device configured to engage with a separate uphole device to rotationally orient the separate uphole device within the main wellbore.

18 . The well system as recited in claim 17 , further including a control line coupler located on the transition sleeve body between the orientation device and the sidewall opening.

19 . The well system as recited in claim 18 , wherein the control line coupler is an inductive coupler.

20 . The well system as recited in claim 18 , wherein the control line coupler is a wet mate coupler.

21 . A method for forming a well system, comprising:

forming a main wellbore within a subterranean formation;

forming a lateral wellbore off of the main wellbore; and

positioning a multilateral junction assembly at a junction between the main wellbore and lateral wellbore, the multilateral junction assembly at least partially insert within the lateral wellbore, the multilateral junction assembly including:

a transition sleeve assembly, the transition sleeve assembly including a transition sleeve body having a sidewall opening in a sidewall thereof, the sidewall opening configured to align with a main wellbore when the transition sleeve assembly is at least partially insert within a lateral wellbore; and

a metal based degradable material positioned on a radial surface of the transition sleeve body covering the sidewall opening, the degradable material configured to degrade over time and uncover the sidewall opening further including an expandable metal anchor positioned on a radial exterior surface of the transition sleeve uphole and downhole of the sidewall opening, the expandable metal anchor including a metal configured to expand in response to hydrolysis to axially and rotationally fix the transition sleeve assembly within the lateral wellbore, wherein the metal based degradable material is expandable metal configured to expand in response to hydrolysis and then degrade to uncover the sidewall opening, and further wherein the layer of expandable metal and the metal based degradable material are a single unitary layer of expandable metal including the metal configured to expand in response to hydrolysis, the single unitary layer of expandable metal configured to degrade around the sidewall opening and form an expanded metal anchor outside of the sidewall opening.