Perforating gun orienting system, and method of aligning shots in a perforating gun

A method of avoiding a frac hit in a hydrocarbon producing field, comprising:

• locating a parent wellbore in the hydrocarbon producing field;
• locating a child wellbore in the hydrocarbon producing field;
• running a perforating gun assembly into the child wellbore, wherein the perforating gun assembly comprises:
• a first perforating gun, the first perforating gun comprising a tubular gun barrel having a first end and an opposing second end;
• a second perforating gun, the second perforating gun also comprising a tubular gun barrel having a first end and an opposing second end;
• a tandem sub, the tandem sub having first and second opposing ends, with each end defining a threaded connector;
• and
• a plurality of charges residing within each of the first and second perforating guns;
• using the tandem sub, threadedly connecting the second end of the tubular gun barrel of the first perforating gun with the first end of the tubular gun barrel of the second perforating gun;
• linearly aligning the plurality of charges of each of the first and second perforating guns at a surface, wherein all charges are aligned in a single direction by rotating one or both of the respective perforating guns relative to the tandem sub;
• rotationally locking the first and second perforating guns relative to the tandem sub, at the surface;
• running the perforating gun assembly into the wellbore at the end of an electric line;
• and
• pumping the perforating gun assembly into a horizontal leg of the child wellbore to a selected depth, wherein the charges are aligned to fire shots into a surrounding subsurface formation at a horizontal orientation and in a direction away from the parent wellbore.