A section of heavy walled tubing that is placed across any perforated interval through which the production tubing must pass, such as may be required in multiple zone completions. In addition to being [..]

For Choke Manifolds, see Blast Spool. For tubing strings in wells, the term Blast Joint applies to a piece of heavy walled tubing, run in the tubing string and positioned across from a perforated interval to resist erosion caused by high velocity production fluid coming from that zone, thus prolonging the life of the completion.