Technical casing

• Technical casing also known as the intermediate casing.
  Is the casing program covers one or two stories in the middle of the casing. Deep in the well, borehole sections easy to collapse and leak, high pressure, salinity and other formations, plays isolated role strata and protecting the well bore.
  Down into the technology,technical casing can guarantee that on the lower part of the casing drilling hole smoothly; also ensures drilling of oil and gas layers of security; casing through the casing hanger hanging on the casing head, casing head upper four-way blowout preventer can be connected, can prevent the blowout.
  Intermediate casing for drilling down into the technology needs, also known as the casing.
  Cement seal casing and wellbore clearance height of isolated strata at least 200 m above.