Multilateral lateral bore completion employing degradable material

A well system, comprising:

• a lateral wellbore extending from a main wellbore located within a subterranean formation;
• and
• a multilateral lateral bore completion located in the lateral wellbore, 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;
• 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;
• a transition sleeve assembly coupled to the first end of the tubular, the transition sleeve assembly including a transition sleeve including a transition sleeve body having sidewall opening in a sidewall thereof, the sidewall opening configured to align with a deflector face of a multilateral deflector assembly as a portion of the transition sleeve extends out into a lateral wellbore;
• degradable material positioned on a radial exterior surface of the transition sleeve body covering the sidewall opening, the degradable material configured to degrade over time and uncover the sidewall opening;
• and
• an expandable metal anchor positioned on a radial exterior surface of the transition sleeve body, the expandable metal anchor including a metal configured to expand in response to hydrolysis to axially and rotationally fix the multilateral lateral bore completion within a wellbore tubular.

A method for forming a well system, comprising:

• forming a lateral wellbore off of the main wellbore located within a subterranean formation;
• and
• positioning a multilateral lateral bore completion in the main wellbore, 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;
• 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;
• a transition sleeve assembly coupled to the first end of the tubular, the transition sleeve assembly including a transition sleeve including a transition sleeve body having sidewall opening in a sidewall thereof, the sidewall opening configured to align with a deflector face of a multilateral deflector assembly as a portion of the transition sleeve extends out into a lateral wellbore;
• degradable material positioned on a radial exterior surface of the transition sleeve body covering the sidewall opening, the degradable material configured to degrade over time and uncover the sidewall opening;
• and
• an expandable metal anchor positioned on a radial exterior surface of the transition sleeve body, the expandable metal anchor including a metal configured to expand in response to hydrolysis to axially and rotationally fix the multilateral lateral bore completion within a wellbore tubular.

A multilateral lateral bore completion, comprising:

• 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;
• 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;
• a transition sleeve assembly coupled to the first end of the tubular, the transition sleeve assembly including a transition sleeve including a transition sleeve body having sidewall opening in a sidewall thereof, the sidewall opening configured to align with a deflector face of a multilateral deflector assembly as a portion of the transition sleeve extends out into a lateral wellbore;
• degradable material positioned on a radial exterior surface of the transition sleeve body covering the sidewall opening, the degradable material configured to degrade over time and uncover the sidewall opening;
• an orientation feature coupled to the transition sleeve body uphole or downhole of the sidewall opening;
• 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 wellbore tubular;
• and
• a control line coupler located on the transition sleeve body between the orientation device and the sidewall opening.