Patent ID: 8151394

Claim:
A piggable pipeline system, comprising: a pipeline; one or more pig launcher/receivers coupled to the pipeline; at least one fitting coupled to the pipeline, the fitting comprising: a body; at least two passages through the body, wherein the passages are in fluid communication within the body; a tubular diverter located lengthwise in one of the passages, wherein the tubular diverter fits snugly inside the passage such that fluid flows longitudinally from one end of the passage to the other end of the passage through the inside of the tubular diverter, wherein the tubular diverter rotates within the passage in which the tubular diverter is located during use, and wherein the tubular diverter comprises an opening in a portion of its wall. wherein the tubular diverter is rotated in the passage during use such that, when the opening in the wall of the tubular diverter at least partially aligns with at least one other passage, there is open flow between the at least one other passage and the inside of the tubular diverter, and, when the opening in the wall of the tubular diverter is not aligned with at least one other passage, flow is inhibited between the at least one other passage and the inside of the tubular diverter; and wherein the pipeline is configured to allow a pig to be launched from at least one of the pig launcher/receivers and returned through the pipeline to at least one of the pig launcher/receivers.