• drilling
    Drilling

    Wells – Chemicals

    Chemicals Used in Fracturing The identities of chemicals incorporated in fracturing fluids were probably the first thing sensationalized about fracturing. The movie “Gasland” created quite a stir with the statement that a “cocktail” of several hundred toxic chemicals were “potentially” used in fracturing. The grain of truth was that there are many chemicals in additives sold for incorporation in fracturing; however; the fact is that most fracs use only a dozen or so major chemicals, some of which are food-grade additives and many are in parts per million concentration. About half of fracturing jobs are “slick water” fracturing fluid that often use low concentrations of two to five chemicals. Many…

  • oxygen scavanger
    Petroleum - English

    What is Oxygen Scavenger

    Is oxygen corrosive? Yes. Oxygen is a highly reactive gaseous element. In the presence of steel, the corrosion rate of oxygen doubles for each 30°F rise in temperature. For example, in a boiler system operating at 400 psig and 444°F, the corrosion rate for oxygen is 256 times more reactive than at room temperature. How does oxygen attack metal surfaces? Oxygen forms localized corrosion areas referred to as “pits.” This distinctive formation is readily distinguishable from acid attack, caustic gouging or chelate corrosion. Oxygen pits can rapidly “drill” through metal surfaces, leading to metal fatigue and failure. What is the oxygen corrosion mechanism? Oxygen corrosion is an electrochemical process similar…