Generally, the first string of casing in a well. it may be lowered into a hole drilled into the formations near the surface and cemented in place; or it may be driven into the ground by a special pile drive (in such cases, it is sometimes called drive pipe); or it may be jetted into [...]

A casing in which the outside diameter of the joint is the same as the outside diameter of the casing itself.

A standardized measure of casing-strength properties. since most oilfield casing is of approximately the same chemistry (typically steel), and differs only in the heat treatment applied, the grading system provides for standardized strengths of casing to be manufactured and used in wellbores. the first part of the nomenclature, a letter, refers to the tensile strength. [...]

Pressure of the annular fluid on the casing at the surface when a well is shut in

Drilling for oil or gas in an ocean, gulf, or sea, usually on the outer continental shelf. a drilling unit for offshore operations may be a mobile floating vessel with a ship or barge hull, a semisubmersible or submersible base, a self-propelled or towed structure with jacking legs (jackup drilling rig), or a permanent structure [...]

A circular device with a frictional gripping arrangement of slips and packing rings used to suspend casing from a casinghead in a well

The location of the bottom of a string of casing that is cemented in a well. typically, a casing shoe is made up on the end of the casing at this point.

The entire length of all the joints of casing run in a well. most casing joints are manufactured to specifications established by api, although non-api specification casing is available for special situations. casing manufactured to api specifications is available in three length ranges.
a joint of range 1 casing is 16 to 25 feet long; [...]

Blade tool used to scrape away junk or debris from inside casing; run on pipe or tubing.

A procedure whereby the formation immediately below the casing shoe is subjected to a pressure equal to the pressure expected to be exerted later by a higher drilling glut density or by the sum of a higher drilling fluid density and back-pressure created by a kick.

1. a device secured around the casing at the regular intervals to center it in the hole. casing that is centralized allows a more uniform cement sheath to form around the pipe.
2. one of several centralizer designs intended to keep the casing better centered in the borehole to get better cement jobs.

To run and cement casing at a certain depth in the wellbore. sometimes called set pipe.

A drilling rig that is used exclusively to drill offshore exploration and development wells and that floats upon the surface of the water when being moved from one drill site to another. it may or may not float once drilling begins. two basic types of mobile offshore drilling units are used to drill most offshore [...]

The string of casing set in a well after the surface casing but before production casing is set. keeps hole from caving and seals off troublesome formations. also called protection casing.

The first casing or conductor string (generally with a diameter of 30 to 36 inches) set when drilling a well from an offshore drilling rig. it prevents sloughing of the ocean-floor formations and is a structural support for the permanent guide base and the blowout preventers.