Oil and Gas Terms Beginning with “T” — Page 7

What Is a Tube Wave? A tube wave (also called a Stoneley wave) is a low-frequency guided acoustic wave that propagates along the borehole-fluid column as a coupled fluid pressure and formation shear deformation wave,… Read more →

A tubing broach is a downhole tool used to repair damaged, collapsed, or obstructed production tubing in a wellbore without pulling the tubing string, by means of a cutting or reshaping profile on the tool's outer… Read more →

Tubing displacement is the volume of fluid required to fill, or that is displaced from, a string of production tubing from surface to a specified depth — calculated from the tubing's internal diameter and length and… Read more →

A tubing end locator (TEL) is a wireline tool run inside a production tubing string to precisely locate the bottom end (tubing shoe) of the production tubing, providing a depth reference that is essential for planning… Read more →

A system of classifying the material specifications for steel alloys used in the manufacture of tubing. Read more →

What Is a Tubing Hanger? A tubing hanger suspends the entire production tubing string from the tubing head spool inside the wellhead , bearing the full mechanical load of the tubing while simultaneously providing a… Read more →

A wellhead component that supports the tubing hanger and provides a means of attaching the Christmas tree to the wellhead. Read more →

The process of removing and replacing the production tubing in an oil or gas well. The term is commonly used when conducting a major workover of a well. Read more →

A tubing joint is a single length of production tubing pipe, typically manufactured to a nominal 30-foot (9.1 meter) length in API Range 2 specification (with Range 1 joints at approximately 20 feet and Range 3 at… Read more →

A tubing performance curve (TPC), also called a vertical lift performance (VLP) curve or outflow performance curve, is a graphical representation of the flowing bottomhole pressure required to lift a specific flow rate… Read more →

Pressure on the tubing in a well, as measured at the wellhead. Read more →

A tubing puncher is a wireline or coiled tubing-deployed downhole tool that perforates the wall of production tubing by mechanically punching, cutting, or explosively shooting holes through the tubing body at a… Read more →

(noun) A seal unit consisting of elastomeric or metal-to-metal packing elements that is landed in a packer bore or polished bore receptacle to create a pressure-tight seal between the tubing string and the packer,… Read more →

A tubing testing tool is a downhole mechanical device used to plug the bottom of a production tubing string, isolating the tubing internal volume from the formation below, so that the assembled tubing string can be… Read more →

A tubing thread is the threaded connection used to mechanically join individual production tubing joints into a continuous tubing string that is run into the wellbore to convey production fluids from the reservoir to… Read more →

What Is Tubing-Conveyed Perforating? Tubing-conveyed perforating (TCP) is a completion method in which a perforating gun assembly is run into the wellbore on the production tubing string rather than on wireline. The… Read more →

A tubing-end locator (TEL) is a downhole tool run on slickline, coiled tubing, or electric wireline that detects the bottom end of the production tubing string suspended in the wellbore, providing a positive depth… Read more →

A tubing-retrievable safety valve (TRSV), also called a tubing-retrievable subsurface safety valve (TRSCSSV), is a subsurface safety valve that is run as an integral component of the production tubing string rather than… Read more →

A tubingless completion is a well-completion design in which reservoir fluids are produced directly through a small-diameter production casing string rather than through a separate production tubing run inside a larger… Read more →

A tubular jar is a downhole jarring tool incorporated into the drill string as a section of standard tubular that delivers high-impact mechanical blows (jarring loads) to free stuck pipe by converting the elastic energy… Read more →

A generic term pertaining to any type of oilfield pipe, such as drill pipe, drill collars, pup joints, casing, production tubing and pipeline. Read more →

(noun) A type of sedimentary rock formed by the consolidation and lithification of volcanic ash and pyroclastic material ejected during explosive volcanic eruptions. Tuff beds serve as important stratigraphic markers… Read more →

What Is the Tuning Effect? The tuning effect is the constructive seismic interference that occurs when a thin bed is thinner than one-quarter of the dominant seismic wavelength, causing the reflected wavelets from the… Read more →

What Is a Turbidite? A turbidite is a sedimentary deposit formed by the rapid deposition of sediment-laden density currents (turbidity currents) that flow down continental slopes into deep-water basins. When slope… Read more →

A turbidity current is a gravity-driven underwater flow of sediment-laden water that moves along the seafloor or lake floor because the sediment suspension makes it denser than the surrounding clear water, capable of… Read more →

Turbulent flow in petroleum engineering is a chaotic, high-velocity fluid flow regime characterized by random three-dimensional fluctuations of velocity, pressure, and density superimposed on the mean flow direction, in… Read more →

What Is a Turnkey Drilling Contract? A turnkey drilling contract is a well-delivery arrangement in which the drilling contractor assumes all responsibility for completing a defined scope of well work, typically from… Read more →

To part or break the drillstring downhole due to either fatigue or excessive torque. Read more →

Parting or breaking of the drillstring downhole due to fatigue or excessive torque. Read more →

A group of 2D seismic lines acquired individually, as opposed to the multiple closely spaced lines acquired together that constitute 3D seismic data. Read more →