Crooked hole:

Terms Related to Crooked hole

• Dogleg

  A particularly crooked place in a wellbore where the trajectory of the wellbore in three-dimensional space changes rapidly. While a dogleg is sometimes created intentionally by ...

• Rathole

  1. A hole in the rig floor, 30 to 35 feet (9 to 11 meters) deep, which is lined with casing that projects above the ...

• Borehole

  1. A hole made by drilling or boring; a wellbore. 2. The wellbore itself, including the openhole or uncased portion of the well. Borehole may ...

• Wellbore

  A borehole; the hole drilled by the bit. A wellbore may have casing in it or it may be open (uncased); or part of it ...

• Pilot hole

  In pipeline construction, the hole drilled as the first step of a directionally drilled river crossing. It establishes a pathway for the pipeline.

• Cable-tool drilling

  A drilling method in which the hole is drilled by dropping a sharply pointed bit on bottom. The bit is attached to a cable, and ...

• Whipstock

  A long steel casing that uses an inclined plane to cause the bit to deflect from the original borehole at a slight angle. Whipstocks are ...