Related Oil & Gas Terms

• Bradenhead squeeze

  A process used to repair a hole in the casing by pumping cement down tubing or drill pipe. first, the casinghead, or bradenhead, is closed to prevent fluids from moving up the casing. then the rig’s pumps are started. pump pressure moves the cement out of the tubing or pipe and, since the top of...

• 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 string. it prevents the casing from snagging on irregularities in the borehole as it is lowered. a passage through the center of the shoe allow drilling fluid to pass up...

• Stuck pipe

  Drill pipe, drill collars, casing, or tubing that has inadvertently become immovable in the hole. sticking may occur when drilling is in progress, when casing is being run in the hole, or when the drill pipe is being hoisted....

• Open-hole completion

  A method of preparing a well for production in which no production casing or liner is set opposite the producing formation. reservoir fluids flow unrestricted into the open wellbore. an open-hole completion has limited use in rather special situations. also called a barefoot completion....

• Annulus

  The space between two concentric objects, such as between the wellbore and casing or between casing and tubing, where fluid can flow. pipe may consist of drill collars, drillpipe, casing or tubing....