- Branża: Oil & gas
- Number of terms: 8814
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An isolation tool set in the casing or liner that enables treatments to be applied to a lower interval while providing isolation from the annulus above. Cement retainers are typically used in cement squeeze or similar remedial treatments. A specially profiled probe, known as a stinger, is attached to the bottom of the tubing string to engage in the retainer during operation. When the stinger is removed, the valve assembly isolates the wellbore below the cement retainer.
Industry:Oil & gas
An interval of log that has been recorded for a second time. The repeat section is typically 200 ft (60 m) long. The purpose is to judge the repeatability of the measurement by recording it twice over the same interval with the same recording parameters. Strictly speaking, the repeatability can be judged properly only if the depth measurement is the same on both runs, if the tool takes the same path in the borehole and if there have been no changes in the borehole or formation. In practice, the repeat section gives a good overall picture of the repeatability of the log. There can be more than one repeat section.
Industry:Oil & gas
An instrument used in sucker-rod pumping to record the variation between the polished rod load and the polished rod displacement.
Industry:Oil & gas
An instrument that records the flow rate of gas through a pipeline. The flow rate is calculated from the pressure differential created by the fluid passing through an orifice of a particular size and other parameters such as static pressure, temperature, density of the fluid and size of the pipe.
Industry:Oil & gas
An instrument for measuring the pore volume, and hence the porosity, of a core sample. The term is also used for some instruments that actually measure grain volume, such as the Boyle?s Law Double-Cell method. Pore volume is then obtained from the difference between bulk volume and grain volume. <br><br>Pore volume is most commonly measured directly by Boyle's Law Single-Cell method, summation of fluids or liquid saturation. Bulk volume is most commonly measured by buoyancy, mercury displacement or a physical measurement of size (calipering); grain volume by Boyle?s law Double-Cell method or disaggregation of the sample. <br><br>Except for disaggregation, all techniques determine the effective porosity, in the sense of all but the isolated pores.
Industry:Oil & gas
An instrument used in a corrosion testing to determine metal loss. The probe directly measures the increase in resistance of a metal as its cross-sectional area is reduced by corrosion. At suitable times, once the readings are obtained, these numbers are converted into corrosion rates (mpy). <br><br>An electrical resistance probe is also called an electrical coupon.
Industry:Oil & gas
An instrument that measures the specific gravity of a mixture of gas, liquid and solids. This device is also known as a densitometer.
Industry:Oil & gas
An installation that processes natural gas to recover natural gas liquids (condensate, natural gasoline and liquefied petroleum gas) and sometimes other substances such as sulfur. A gas processing plant is also known as a natural gas processing plant.
Industry:Oil & gas
An in-situ recording in which a material with high neutron-capture cross section is injected into the flowstream of a production or injection well to determine fluid paths and velocities. The material used is normally borax or water with high salinity, both of which cause a significant increase in the capture cross section measured by a pulsed-neutron log. In the most common application, the material is injected across the producing intervals of a production well. By comparing pulsed neutron logs recorded before and after injection, the injectivity, and hence productivity, of each interval can be estimated. Any cement channels or leaks will also be observed.
Industry:Oil & gas
An insoluble organic deposit that has low hydrogen content. Coke, also known as pyrobitumen, is formed by thermal cracking and distillation during in-situ combustion.
Industry:Oil & gas
