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  2. Pipe recovery operations - Wikipedia

    en.wikipedia.org/wiki/Pipe_recovery_operations

    Pipe Stretch Free Point Estimate. The pipe stretch free point estimate is a good starting point for identifying the free point. Pull the drillstring to the pipe's neutral weight, which is the combined weight of blocks and the weight of the drill string and make a mark(X 1)(in) at the top of the rotary table.

  3. Log cabin - Wikipedia

    en.wikipedia.org/wiki/Log_cabin

    Built in 1640, C. A. Nothnagle Log House, located in Swedesboro, New Jersey, is likely the oldest log cabin in the United States. A conjectural replica of the log cabin in which U.S. president Abraham Lincoln was born, now at the Abraham Lincoln Birthplace Mortonson–Van Leer Log Cabin in New Sweden Park in Swedesboro, New Jersey A replica log cabin at Valley Forge in Pennsylvania A log house ...

  4. Invert level - Wikipedia

    en.wikipedia.org/wiki/Invert_level

    A pipe laser, or another vertical distance measuring device is most commonly used for this. Invert levels are important for the drainage of a non-pressured fluid pipe. Typically, a good design requires that the invert level of the pipe will be lower (or at least not higher) for each section of pipe before it reaches its final destination. [5]

  5. Wikipedia:Language learning centre/Word list - Wikipedia

    en.wikipedia.org/wiki/Wikipedia:Language...

    baa; baaing; baal; babas; babble; babbled; babbler; babblers; babbles; babbling; babe; babel; babes; babies; baboon; baboons; baby; baby-sitter; babyface; babyhood ...

  6. Speaking tube - Wikipedia

    en.wikipedia.org/wiki/Speaking_tube

    Permanently fitted, rigid voice pipes are still in use and are generally covered with heavy lids to avoid ingress of water. The speaker has to place his mouth in the "horn" or bell-shaped end of the pipe and the receiver has to 'bend an ear' to hear what is being said. Voice pipes have generally been replaced by sound-powered telephones.