Template and system of templates for drilling and completing offset well bores

A template positionable in a main well bore and configured for circulating fluids through the main well bore, said template comprising;

• a body;
• a tubular inlet leg, a tubular main outlet, and a tubular offset outlet leg, said legs opening into said body;
• a straddle assembly including a straddle tube having proximal and distal ends and proximal and distal seals positioned substantially at said proximal and distal ends, wherein said proximal seal is mounted in said inlet leg and said distal seal is mounted in said main outlet leg to provide a continuous straddle assembly flow path through said body substantially preventing fluid flow from said inlet leg and from said main outlet leg into said offset outlet leg;
• and
• a continuous downhole flow path through said inlet leg, said straddle assembly, and said main outlet leg.

A template system having a plurality of templates, the system configured for circulating a fluid in a well bore, the system comprising:

• an initial template and a first additional template, each said initial and first additional templates including,
• a body, a tubular inlet leg, a tubular main outlet leg and a tubular offset outlet leg, said legs opening into said body,
• a straddle assembly including a straddle tube having proximal and distal ends and proximal and distal seals positioned substantially at said proximal and distal ends, wherein said proximal seal is mounted in said inlet leg and said distal seal is mounted in said main outlet leg to provide a continuous straddle assembly flow path through said body substantially preventing fluid flow from said inlet leg into said offset outlet leg, and
• a continuous downhole flow path through said inlet leg, said straddle assembly, and said main outlet leg,
• wherein said main outlet leg of said initial template is serially connected to said inlet leg of said first additional template to connect said continuous downhole flow path of said initial template to said continuous downhole flow path of said first additional template.

A template system positionable in a main well bore and having a plurality of templates, the system configured for drilling at least one offset well bore through one of the templates from the main well bore, the system comprising:

• an initial template and a first additional template, each said initial and first additional templates including,
• a substantially cylindrical body having a sidewall, proximal face and a distal face, wherein said proximal and distal faces are substantially perpendicular to said sidewall and said body encloses a primary chamber;
• a tubular inlet leg engaging said proximal face and aligned with an inlet opening in said proximal face, wherein said inlet opening directly accesses said primary chamber;
• a tubular main outlet leg engaging said distal face and aligned with a main outlet opening in said distal face, wherein said offset outlet opening directly accesses said primary chamber;
• and
• a tubular offset outlet leg engaging said distal face and aligned with an offset outlet opening in said distal face, wherein said offset outlet opening directly accesses said primary chamber and, wherein said inlet leg is free from intersection with said main outlet leg or said offset outlet leg within said primary chamber,
• wherein said main outlet leg of said initial template is serially connected to said inlet leg of said first additional template.