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  2. Environmental gradient - Wikipedia

    en.wikipedia.org/wiki/Environmental_gradient

    An environmental gradient, or climate gradient, is a change in abiotic (non-living) factors through space (or time). Environmental gradients can be related to factors such as altitude , depth, temperature , soil humidity and precipitation .

  3. Oil well control - Wikipedia

    en.wikipedia.org/wiki/Oil_well_control

    The pressure gradient is described as the pressure per unit length. Often in oil well control, pressure exerted by fluid is expressed in terms of its pressure gradient. The SI unit is pascals/metre. The hydrostatic pressure gradient can be written as: Pressure gradient (psi/ft) = HSP/TVD = 0.052 × MW (ppg). [12]

  4. Gradsect - Wikipedia

    en.wikipedia.org/wiki/Gradsect

    A gradsect or gradient-directed transect is a low-input, high-return sampling method where the aim is to maximise information about the distribution of biota in any area of study. Most living things are rarely distributed at random , their placement being largely determined by a hierarchy of environmental factors.

  5. Well control - Wikipedia

    en.wikipedia.org/wiki/Well_control

    Casing depths, well control options, formation fracture pressures and limiting fluid weights may be based on this information. To determine formation strength and integrity, a Leak Off Test (LOT) or a Formation Integrity Test (FIT) may be performed. The FIT is: a method of checking the cement seal between the casing and the formation.

  6. Corona discharge - Wikipedia

    en.wikipedia.org/wiki/Corona_discharge

    It represents a local region where the air (or other fluid) has undergone electrical breakdown and become conductive, allowing charge to continuously leak off the conductor into the air. A corona discharge occurs at locations where the strength of the electric field (potential gradient) around a conductor exceeds the dielectric strength of

  7. Efforts to stem the Deepwater Horizon oil spill - Wikipedia

    en.wikipedia.org/wiki/Efforts_to_stem_the...

    The government's estimates suggested the cap and other equipment were capturing less than half of the oil leaking from the sea floor as of late June. [24] On July 10, robots removed the containment cap to replace it with a better-fitting cap ("Top Hat Number 10"); this meant all of the leaking oil would escape until the new cap was in place. [25]

  8. Fugitive emission - Wikipedia

    en.wikipedia.org/wiki/Fugitive_emission

    A detailed inventory of greenhouse gas emissions from upstream oil and gas activities in Canada for the year 2000 estimated that fugitive equipment leaks had a global warming potential equivalent to the release of 17 million metric tonnes of carbon dioxide, or 12 percent of all greenhouse gases emitted by the sector, [9] while another report put fugitive emissions at 5.2% of world greenhouse ...

  9. Leaky bucket - Wikipedia

    en.wikipedia.org/wiki/Leaky_bucket

    Water can be added intermittently to the bucket, which leaks out at a constant rate until empty, and will also overflow when full. The leaky bucket is an algorithm based on an analogy of how a bucket with a constant leak will overflow if either the average rate at which water is poured in exceeds the rate at which the bucket leaks or if more ...