The pipe and special fittings used on floating offshore drilling rigs to establish a seal between the top of the wellbore, which is on the ocean floor, and the drilling equipment, located above the surface of the water. a riser pipe serves as a guide for the drill stem from the drilling vessel to the [...]

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 short string of large-diameter casing used to keep the wellbore open and to provide a means of conveying the upflowing drilling fluid from the wellbore to the mud pit.

The first string of casing (after the conductor pipe) that is set in a well. it varies in length from a few hundred to several thousand feet. some states require a minimum length to protect freshwater sands. compare conductor 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.

A long, hollow cylinder, usually steel, through which fluids are conducted. oilfield tubular goods are casing (including liners), drill pipe, tubing, or line pipe

An auxiliary part (such as a coupling, elbow, tee, or cross) used for connecting lengths of pipe.

A blowout preventer that uses pipe rams as the closing elements. see pipe ram.

Heavy seamless tubing used to rotate the bit and circulate the drilling fluid. joints of pipe approximately 30 feet (9 meters) long are coupled together by means of tool joints.

1. a short length of surface-hardened pipe that fits inside the swivel and serves as a conduit for drilling fluid through the swivel. 2. sometimes used to mean washover pipe.

To pump a quantity of heavy mud into the drill pipe. before hoisting drill pipe, it is desirable (if possible) to pump into its top section a quantity of heavy mud (a slug) that causes the level of the fluid to remain below the rig floor so that the crew members and the rig floor [...]

1. to place pipe withdrawn from the hole on a pipe rack 2. to stand pipe on the derrick floor when pulling it out of the hole.

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

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. [...]

A short section of plain tubing used to separate or space-out specialized components in a completion assembly. blank pipe is commonly used in sand control completions where intervals of screen are separated by short sections of blank pipe. the term is also used to describe unperforated sections of casing or liner.