- Branża: Oil & gas
- Number of terms: 8814
- Number of blossaries: 0
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Quantity that is double the filtrate volume collected from a filtration test between 7. 5 to 30 minutes. This ignores the spurt of filtrate that comes out of the filter press before a cake is established. Relative filtrate volume is used to evaluate certain mud materials. Relative filtrate volume can be expressed as Vrel, = (V<sub>30</sub> - V<sub>7. 5</sub>) x 2. Static filtration theory holds that filtrate volume increases as the square root of time. Thus, the volume from 0 to 7. 5 minutes should be the same as from 7. 5 to 30 minutes in the case of no spurt loss in the first interval. Because spurt often occurs in the 0 to 7. 5 minutes, those data can be ignored by doubling the volume in the second interval. This practice has no bearing on dynamic filtration or on high-pressure, high-temperature filtration tests.
Industry:Oil & gas
Planned and systematic monitoring, testing and documenting of practices to show that a product or procedure meets established standards. Companies that manufacture, process, sell, handle, ship or buy drilling fluid materials typically establish QA programs. Some oil company labs perform QA testing. API and ISO jointly issue specifications for mud materials. A mud supplier must meet specifications and adhere to quality testing practices in order to place an API monogram (logo) on a product. Suppliers are required to pay for use of the API monogram program. Quality specifications that the API has adopted through joint user and supplier efforts are not always suitable for all users of the materials.
Industry:Oil & gas
Pipe dope, a specially formulated blend of lubricating grease and fine metallic particles that prevents thread galling (a particular form of metal-to-metal damage) and seals the roots or void spaces of threads. The American Petroleum Institute (API) specifies properties of pipe dope, including its coefficient of friction. The rig crew applies copious amounts of pipe dope to the drillpipe tool joints every time a connection is made.
Industry:Oil & gas
Pieces of rock that came from the wellbore but that were not removed directly by the action of the drill bit. Cavings can be splinters, shards, chunks and various shapes of rock, usually spalling from shale sections that have become unstable. The shape of the caving can indicate why the rock failure occurred. The term is typically used in the plural form.
Industry:Oil & gas
Phases that can mix and form a homogeneous mixture. Hydrocarbon gases and liquids are commonly miscible.
Industry:Oil & gas
Pertaining to wells that are hotter or higher pressure than most. The term came into use upon the release of the Cullen report on the Piper Alpha platform disaster in the UK sector of the North Sea, along with the contemporaneous loss of the Ocean Odyssey semisubmersible drilling vessel in Scottish jurisdictional waters. In the UK, HPHT is formally defined as a well having an undisturbed bottomhole temperature of greater than 300<sup>o</sup>F (149<sup>o</sup>C) and a pore pressure of at least 0. 8 psi/ft (~15. 3 lbm/gal) or requiring a BOP with a rating in excess of 10,000 psi (68. 95 MPa). Although the term was coined relatively recently, wells meeting the definition have been safely drilled and completed around the world for decades.
Industry:Oil & gas
Pertaining to waves of elastic energy, such as that transmitted by P-waves and S-waves, in the frequency range of approximately 1 to 100 Hz. Seismic energy is studied by scientists to interpret the composition, fluid content, extent and geometry of rocks in the subsurface. "Seismic," used as an adjective, is preferable to "seismics," although "seismics" is used commonly as a noun.
Industry:Oil & gas
Pertaining to variation of the survey geometry while maintaining the frequency of electromagnetic surveying. In contrast, parametric pertains to keeping frequency the same while varying the geometry.
Industry:Oil & gas
