Optimizing Operational Parameters can "Save You Money" as well as Improve Bit Life and ROP

Content of PetroWiki is intended for personal use only and to supplement, not replace, engineering judgment. SPE disclaims any and all liability for your use of such content. This category has the following 4 subcategories, out of 4 total.

Content of PetroWiki is intended for personal use only and to supplement, not replace, engineering judgment. SPE disclaims any and all liability for your use of such content. Pages that need a taxonomy assigned. The following 42 pages are in this category, out of 42 total.

Alternating current {AC) induction motors are widely used in the oil and gas industry because of their simplicity, reliability, and low cost. Induction motors are either single-phase or three-phase. In an induction motor, the actual rotor speed always is less than that of the rotating magnetic field. The stator and the rotor are electrical circuits that perform as electromagnets. The stator is the stationary electrical part of the motor.

An enclosure protects a motor from contaminants in the environment in which it is operating. In addition, the type of enclosure affects the cooling of the motor. Enclosures are categorized as either open or totally enclosed, and there are different types of enclosures within each category. Open enclosures permit cooling air to flow through the motor. One type of open enclosure is the ODP enclosure.

Portfolio analysis is based on the Nobel Prize-winning work of Harry Markowitz in the early 1950s[1][2] in which he showed that the variance in results from a portfolio of stocks could be reduced by choosing stocks with a negative correlation. If two stocks are correlated negatively, when one stock is down the other stock will be up, and the portfolio will grow with very few wild swings. This concept has been introduced into the petroleum literature by several authors[3][4][5][6][7][8][9][10][11] with some modifications. The following paragraphs from Brashear, Becker, and Faulder[4] give an overview of the methodology. Harry Markowitz (1957)[2] demonstrated in the stock market that risk and return are usually correlated.

Content of PetroWiki is intended for personal use only and to supplement, not replace, engineering judgment. SPE disclaims any and all liability for your use of such content. The following 55 pages are in this category, out of 55 total.

Electrical grounding can be classified in either system grounding and equipment grounding. Requirements for system grounding are covered in detail in the Natl. System grounding includes grounding of the power supply neutral so that the circuit protective devices will remove a faulty circuit from the system quickly and effectively. To protect personnel from electric shock, all enclosures that house electrical devices that might become energized because of unintentional contact with energized electrical conductors should be effectively grounded. If the enclosures are not grounded properly, unsafe voltages could exist, which could be fatal to the operating personnel.