Sidetrack:

Terms Related to Sidetrack

• Whipstock anchor packer

  A special-purpose packer placed in the casing to permit a sidetrack operation.

• Turbodrill

  A downhole motor that rotates a bit by the action of the drilling mud on turbine blades b built into the tool. When a turbodrill ...

• Bent sub

  A short cylindrical device installed in the drill stem between the bottom-most drill collar and a downhole motor. Its purpose is to deflect the downhole ...

• 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 ...

• Retainer

  A cast-iron or magnesium drillable tool consisting of a packing assembly and a back-pressure valve. It is used to close off the annular space between ...

• Trip tank

  A small mud tank with a capacity of 10 to 15 barrels, usually with 1-barrel or h-barrel divisions, used to ascertain the amount of mud ...

• Drill out

  1. To remove with the drill bit the residual cement that normally remains in the lower section of casing and the wellbore after the casing ...