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  2. Pipe tool - Wikipedia

    en.wikipedia.org/wiki/Pipe_tool

    These three tools can be combined in different ways. Most common is the three-in-one Czech tool, which consists of a tamper, reamer and pick joined together. A pipe knife is another three-in-one tool: the reamer and pick fold into the casing in the same fashion as a pocketknife, while the blunt end is used as a tamper. A pipe nail is a nail ...

  3. Reamer - Wikipedia

    en.wikipedia.org/wiki/Reamer

    A reamer is a type of rotary cutting tool used in metalworking. Precision reamers are designed to enlarge the size of a previously formed hole by a small amount but with a high degree of accuracy to leave smooth sides. There are also non-precision reamers which are used for more basic enlargement of holes or for removing burrs.

  4. Underreamer - Wikipedia

    en.wikipedia.org/wiki/Underreamer

    Compact block-type PDC underreamer (Drillstar Z-Reamer) An underreamer is a device used to enlarge the borehole below an existing casing or restriction, during a well drilling operation. It can be positioned either above the drill bit or above a pilot assembly run inside the existing borehole.

  5. Chamber reamer - Wikipedia

    en.wikipedia.org/wiki/Chamber_reamer

    A chamber reamer is a specific type of fluted reamer used by gunsmiths and firearms manufacturers to cut the chamber of a handgun, rifle, or shotgun. The chamber reamer is inserted into the bore of a barrel and held stationary while the barrel is turned around it (typically by means of a lathe ).

  6. Bottom hole assembly - Wikipedia

    en.wikipedia.org/wiki/Bottom_hole_assembly

    Rotary assemblies [2] are commonly used where formations are predictable and the rig economics are an issue. In such an assembly the weight of the drill collars gives the BHA the tendency to sag or flex to the low side of the hole, collar stiffness length and stabiliser diameter and placement are engineered as a means of controlling the flex of the BHA.

  7. Gimlet (tool) - Wikipedia

    en.wikipedia.org/wiki/Gimlet_(tool)

    A gimlet is a hand tool for drilling small holes, mainly in wood, without splitting. It was defined in Joseph Gwilt's Architecture (1859) as "a piece of steel of a semi-cylindrical form, hollow on one side, having a cross handle at one end and a worm or screw at the other". [1] A gimlet is always a small tool.

  8. Tap and die - Wikipedia

    en.wikipedia.org/wiki/Tap_and_die

    While modern nuts and bolts are routinely made of metal, this was not the case in earlier ages, when woodworking tools were employed to fashion very large wooden bolts and nuts for use in winches, windmills, watermills, and flour mills of the Middle Ages; the ease of cutting and replacing wooden parts was balanced by the need to resist large amounts of torque, and bear up against ever heavier ...

  9. Cheater bar - Wikipedia

    en.wikipedia.org/wiki/Cheater_bar

    Cheater bars are usually used to free threaded pipe, screws, bolts, and other fasteners that are difficult to remove with a ratchet or pipe wrench alone. They are also commonly used to operate valves.

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