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  2. List of free geology software - Wikipedia

    en.wikipedia.org/wiki/List_of_free_geology_software

    This is a list of free and open-source software for geological data handling and interpretation. The list is split into broad categories, depending on the intended use of the software and its scope of functionality. Notice that 'free and open-source' requires that the source code is available and users are given a free software license.

  3. Request for quotation - Wikipedia

    en.wikipedia.org/wiki/Request_for_quotation

    A request for quotation (RfQ) is a business process in which a company or public entity requests a quote from a supplier for the purchase of specific products or services. RfQ generally means the same thing as Call for bids (CfB) and Invitation for bid (IfB). [1] An RfQ typically involves more than the price per item.

  4. Well logging - Wikipedia

    en.wikipedia.org/wiki/Well_logging

    Well logging, also known as borehole logging is the practice of making a detailed record (a well log) of the geologic formations penetrated by a borehole. The log may be based either on visual inspection of samples brought to the surface ( geological logs) or on physical measurements made by instruments lowered into the hole ( geophysical logs).

  5. Drilling formula sheets - Wikipedia

    en.wikipedia.org/wiki/Drilling_formula_sheets

    Drilling Formula Sheets is a set of Drilling Formulas used commonly by drilling engineers in the onshore and offshore oil drilling industry. They are used as part of a key piece of engineering work called Well Control .

  6. Measurement while drilling - Wikipedia

    en.wikipedia.org/wiki/Measurement_while_drilling

    A drilling rig is used to create a borehole or well (also called a wellbore) in the earth's sub-surface, for example in order to extract natural resources such as gas or oil. During such drilling, data is acquired from the drilling rig sensors for a range of purposes such as: decision-support to monitor and manage the smooth operation of ...

  7. Borehole - Wikipedia

    en.wikipedia.org/wiki/Borehole

    As the depth of the holes varied, the drilling of a single well could last nearly one full decade. [4] It was not up until the 19th century that Europe and the West would catch up and rival ancient Chinese borehole drilling technology. [10] [5] For many years, the world's longest borehole was the Kola Superdeep Borehole in Russia.