Keeping onshore and offshore pipelines operating safely flowing freely is what T. D. Williamson is all about. A leading global pipeline equipment and services provider, the company designs, manufactures, and maintains oil field machinery and systems including pipeline pigging (scraping), gas leak detection, pipeline inspection, plugging, tapping, valve and clamp, and cathodic protection equipment. The company also offers general pipeline, training, turnkey, and repair services. T. D. Williamson operates a global network of sales offices and representatives.