- Domeniu: Oil & gas
- Number of terms: 8814
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A welding technique used to join two tubes in which the squared and prepared ends are butted together in preparation for welding. The resulting circumferential weld has relatively good strength characteristics but has limitations where the tube is to be plastically deformed or bent, such as occurs on a coiled tubing string. Consequently, butt welds performed on a coiled tubing string should be checked carefully using hardness and radiographic testing methods and their locations detailed in the string record. The anticipated fatigue life in the butt-weld area must also be reduced to compensate for the weakness of the weld.
Industry:Oil & gas
A volume of water placed in a tubing string prior to conducting a drillstem test or opening a well to flow. The water cushion is designed to reduce and control the pressure drawdown applied to the reservoir when the downhole valve or tester valve is opened to initiate flow.
Industry:Oil & gas
A volume of polymer slurry placed in a wellbore, which, in time and under the correct temperature conditions, will develop to provide a high-viscosity platform on which a cement plug can be placed. Polymer plugs are typically used when a cement plug must be set accurately within the wellbore, The viscous material prevents the dense cement slurry from fingering through the lighter wellbore fluid during placement, helping to ensure that cement is placed over the desired interval.
Industry:Oil & gas
A volume of fluid that refers to the daily total production of oil and water from a well. The volume of a barrel is equivalent to 42 US gallons, abbreviated BLPD.
Industry:Oil & gas
A void in the pipe coating. Coating flaws are detected by either mechanical or visual inspections and must be repaired to avoid significant corrosion problems. <br><br>A coating flaw is also called a holiday.
Industry:Oil & gas
A viscous fluid used to aid removal of drilling fluids before a primary cementing operation. The spacer is prepared with specific fluid characteristics, such as viscosity and density, that are engineered to displace the drilling fluid while enabling placement of a complete cement sheath.
Industry:Oil & gas
A virtual well used to mathematically create the effect of a flow barrier. The pressure transient behavior both at the well and in the reservoir is identical for the following two cases: 1) a well near a barrier represented by a plane normal to the bedding, or 2) a well producing or injecting at the same rate as the tested well. In the second case, the effect is of a barrier bisecting the space between the two wells.
Industry:Oil & gas
A vessel with its cylindrical axes perpendicular to the ground that is used to separate oil, gas and water from the production stream. The vessel can be a two-phase or three-phase separator.
Industry:Oil & gas
A vessel, with its cylindrical axes parallel to the ground, that is used to separate oil, gas and water from the produced stream. The horizontal separator can be a two-phase or three-phase separator.
Industry:Oil & gas
A vessel used to treat oil-water emulsions so the oil can be accepted by the pipeline or transport. A treater can use several mechanisms. These include heat, gravity segregation, chemical additives and electric current to break emulsions. <br><br>There are vertical and horizontal treaters. The main difference between them is the residence time, which is shorter in the vertical configuration compared with the horizontal one. <br><br>A treater can be called a heater treater or an emulsion treater.
Industry:Oil & gas
