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  2. Pipe recovery operations - Wikipedia

    en.wikipedia.org/wiki/Pipe_recovery_operations

    Key Seated Stuck Pipe. Key seating occurs when the drill string becomes off-centered in the wellbore, and the pipe collars become caught on a deviation in the wellbore. If the rig is able to move the drill string freely downhole, but every time the drill string is pulled upward it becomes stuck at the same point, then it is likely that the pipe ...

  3. Leader head - Wikipedia

    en.wikipedia.org/wiki/Leader_Head

    Copper Leader Head at Penn's Quadrangle, Philadelphia 1894 Copper Leader at Shofuso Japanese House and Garden in Philadelphia. The purpose of a leader head is to help transfer excess water from the roof onto downspouts, thus preventing the gutters from overflowing and water washing over the walls, which is a common occurrence in areas susceptible to heavy rain cycles.

  4. Roof seamer - Wikipedia

    en.wikipedia.org/wiki/Roof_seamer

    A roof seamer is a portable roll forming machine that is used to install mechanically seamed structural standing-seam metal roof panels, as part of an overall metal construction building envelope system. The machine is small and portable to be handled by an operator on top of a roof.

  5. Piping and instrumentation diagram - Wikipedia

    en.wikipedia.org/wiki/Piping_and_instrumentation...

    Piping and instrumentation diagram of pump with storage tank. Symbols according to EN ISO 10628 and EN 62424. A more complex example of a P&ID. A piping and instrumentation diagram (P&ID) is defined as follows: A diagram which shows the interconnection of process equipment and the instrumentation used to control the process.

  6. Safe extrication: Crews remove roof of vehicle stuck under ...

    www.aol.com/safe-extrication-crews-remove-roof...

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  7. Hollow structural section - Wikipedia

    en.wikipedia.org/wiki/Hollow_structural_section

    A hot-rolled HSS-box section cut open with a bandsaw, demonstrating residual stress. A hollow structural section (HSS) is a type of metal profile with a hollow cross section. The term is used predominantly in the United States, or other countries which follow US construction or engineering terminology.

  8. How to Finally Address Your Stress in the New Year - AOL

    www.aol.com/finally-address-stress-125700280.html

    Your nervous system is activated, which prepares your body for physical action. How Stress Hormones Work Under stress, the body activates a complex cascade of hormonal and neurological processes ...

  9. Bob Costas retires as MLB play-by-play voice after 44-year ...

    www.aol.com/sports/bob-costas-retires-mlb-play...

    Bob Costas is retiring as an MLB play-caller after a career that lasted more than 40 years. Costas confirmed the decision to The Athletic but declined to offer a statement, telling Andrew Marchand ...