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

A downhole tool used to repair damaged or collapsed tubing. The tubing broach incorporates a cutter profile that is forced inside the tubing by jarring or hydraulic force to re-form the tubing wall by removing tubing… Read more →

A type of batch-treating technique used in corrosion control in which a batch of corrosion inhibitor is displaced through the tubing to the bottom of the well. The well is shut in for 2 to 15 hr and then put back on… Read more →

A downhole tool frequently used in slickline or coiled tubing tool assemblies to confirm or correlate the tool position on depth-sensitive applications. With the end of the production tubing as a known reference point,… 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 single length of the pipe that is assembled to provide a conduit through which the oil or gas will be produced from a wellbore. Tubing joints are generally around 30 ft [9 m] long with a thread connection on each end.… Read more →

A mathematical tool used in production engineering to assess the performance of the completion string by plotting the surface production rate against the flowing bottomhole pressure. The fluid composition and behavior… Read more →

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

A special perforating gun, or charge, that is designed for limited penetration to allow an inner tubing or casing string to be perforated without damaging a surrounding outer string. These guns often are used in… 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 downhole tool used to plug the bottom of a production tubing string when pressure testing the assembled string. Slickline-deployed tools and plugs are most commonly used in vertical or slightly deviated wellbores. Read more →

The threaded connection used to assemble the tubing string from individual tubing joints. Various tubing thread types have evolved to suit the wellbore conditions and functions required of the tubing string, both during… 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 downhole tool used on slickline or coiled tubing operations to identify the end of the production tubing, or similar well features. This information is used to correlate the position of the tool string for accurate… Read more →

A type of subsurface safety valve that is run and retrieved as part of the production tubing string. The TRSV body is integral part of the completion that enables the internal components to be configured to provide near… Read more →

A completion design in which the reservoir fluids are produced through small-diameter casing. The absence of a separate tubing string significantly limits the operating and contingency options available for the well. Read more →

A downhole tool used on slickline operations. The tubular jar is a relatively simple mechanical jar that is extended or collapsed by manipulation of the slickline at surface. The impact force delivered by the jar… 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 →

A phenomenon of constructive or destructive interference of waves from closely spaced events or reflections. At a spacing of less than one-quarter of the wavelength, reflections undergo constructive interference and… 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 →

An influx of rapidly moving, sediment-laden water down a slope into a larger body of water; also called a density current because the suspended sediment results in the current having a higher density than the clearer… Read more →

A type of fluid flow characterized by swirling or chaotic motion as the fluid moves along the flow path. This is a preferred flow regime for mud removal during primary cementing because it is perceived to result in… Read more →

A type of financing arrangement for the drilling of a wellbore that places considerable risk and potential reward on the drilling contractor. Under such an arrangement, the drilling contractor assumes full… 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 →

Seismic data or a group of seismic lines acquired individually such that there typically are significant gaps (commonly 1 km or more) between adjacent lines. A 2D survey typically contains numerous lines acquired… Read more →