Float collar:

The float collar prevents drilling mud from entering the casing while it is being lowered, allowing the casing to float during its descent and thus decreasing the load on the derrick or mat.

A float collar also prevents backflow of cement during a cementing operation.

Terms Related to Float collar

• Float shoe

  A short, heavy, cylindrical steel section with a rounded bottom and attached to the bottom of the casing string. It contains a check valve and ...

• Guide shoe

  1. A short, heavy, cylindrical section of steel filled with concrete and rounded at the bottom, which is placed at the end of the casing ...

• Collar locator

  A logging device used to determine accurately the depth of a well; the log measures and records the depth of each casing collar, or coupling, ...

• Drill string float

  A check valve in the drill string that will allow fluid to be pumped into the well but will prevent flow from entering the string.

• Perforation depth control log (pdc log)

  A special type of nuclear log that measures the depth of each casing collar. Knowing the depth of the collars makes it easy to determine ...

• Taper tap

  A tap with a gradually decreasing diameter from the top. It is used to retrieve a hollow fish such as a drill collar and is ...

• Die collar

  N: a collar or coupling of tool steel, threaded internally, that can be used to retrieve pipe from the well on fishing jobs; the female ...