$TWTR Superior Drilling Products. SDPI (nyse) is an oil & gas drilling and tool manufacturer, refurbisher to the biggest contract services companies like Baker Hughes(BKR) Schlumberger(SLB) Weatherford(WFRD) and some contract services providers in the middle east, SDPI has seen an increasing market share, strengthening of their balance sheet, has very little debt and a small float of 11.6 million shares, with an undervalued share price compared to other companies in the competing space, this would be a worthwhile add to any portfolio looking for a small company for possible future growth. Always do your DD.