Patent ID: 8783367

Claim:
A lateral liner tie back system comprising: a junction sub having an outer wall enclosing a central bore, an opening through said outer wall, and a key affixed to said outer wall adjacent to said opening; a base sub having a central bore extending therethrough and a tapered upper end surface for directing a lower end of said junction sub from a main bore into a lateral bore such that an upper end of an existing liner positioned within said lateral bore is disposed within said central bore of said junction sub, wherein said key of said junction sub is dimensioned to engage said tapered upper end surface of said base sub for aligning said opening of said junction sub with said tapered upper end surface of said base sub; and a tie back sub dimensioned to fit through said central bore of said junction sub, said tie back sub having a first outer wall, a tapered second outer wall, an interconnecting shoulder, a central bore enclosed by said first outer wall and said tapered second outer wall, and a series of threads extending along a circumference of said tapered second outer wall, wherein said series of threads on said tapered second outer wall are dimensioned to engage said upper end of said existing liner positioned within said lateral bore.