Two, three, or four joints of pipe fastened together, called a double, thribble, or fourble, respectively.

A vertical pipe rising along the side of the derrick or mast, which joins the discharge line leading from the mud pump to the rotary hose […]

Any process undertaken to enlarge old channels or to create new ones in the producing formation of a well (e.g., acidizing or formation fracturing).

The natural layering or lamination characteristic of sediments and sedimentary rocks.

A petroleum trap that occurs when the top of the reservoir bed is terminated by other beds or by a change of porosity or permeability within […]

The entire length of casing, tubing, sucker rods, or drill pipe run into a hole.

The process of running the drillstring into or out of the well under “Kick” conditions (see Kick). Normally through a closed annular BOP but may be […]

A petroleum trap that is formed because of deformation (such as folding or faulting) of the reservoir formation. Compare stratigraphic trap.

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 […]

A short, threaded piece of pipe used to adapt parts of the drilling string that cannot otherwise be screwed together because of differences in thread size […]

A mobile bottom-supported offshore drilling structure with several compartments that are flooded to cause the structure to submerge and rest on the seafloor. Submersible rigs are […]