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  2. Pipe recovery operations - Wikipedia

    en.wikipedia.org/wiki/Pipe_recovery_operations

    The Drill Collar Severing Tool is often used to separate heavy weight drill pipe or drill collars. The DCST contains an explosive charge at either end of the tool; both charges are detonated simultaneously. The explosive shock waves meet in the center of the tool and combine to produce a very high energy wave capable of cutting through the ...

  3. 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.

  4. List of components of oil drilling rigs - Wikipedia

    en.wikipedia.org/wiki/List_of_components_of_oil...

    Drill bit (#26) is a device attached to the end of the drill string that breaks apart the rock being drilled. It contains jets through which the drilling fluid exits. Drill floor (#21) is the area on the rig where the tools are located to make the connections of the drill pipe, bottom hole assembly, tools and bit. It is considered the main area ...

  5. Horse harness - Wikipedia

    en.wikipedia.org/wiki/Horse_harness

    A horse harness is a device that connects a horse to a horse-drawn vehicle or another type of load to pull. There are two main designs of horse harness: (1) the breast collar or breaststrap, and (2) the full collar or collar-and-hames. For pulling heavy loads, a full collar is required because it distributes pressure over a larger area of the ...

  6. Breastplate (tack) - Wikipedia

    en.wikipedia.org/wiki/Breastplate_(tack)

    The other design is the collar and hames design, also called a "full collar", which is required in order to pull very heavy loads because it distributes pressure over a larger area of the horse. One of the main advantages of using a breast collar style harness is that it fits on almost any size or shape of horse, unlike a full collar which must ...

  7. Rare, ancient tool used for horses is found in German ...

    www.aol.com/rare-ancient-tool-used-horses...

    (Humans have been domesticating horses for thousands of years, at least since 3,500 B.C., according to a 2011 study published in the journal PLOS One.) The tool, which was made between 1,300 and ...

  8. Drilling stabilizer - Wikipedia

    en.wikipedia.org/wiki/Drilling_stabilizer

    A drilling stabilizer is a piece of downhole equipment used in the bottom hole assembly (BHA) of a drill string. It mechanically stabilizes the BHA in the borehole in order to avoid unintentional sidetracking, vibrations, and ensure the quality of the hole being drilled.

  9. Horse collar - Wikipedia

    en.wikipedia.org/wiki/Horse_collar

    Two horse collars, with hames Modern draft horse wearing a horse collar (the horse is not yet fully harnessed). A horse collar is a part of a horse harness that is used to distribute the load around a horse 's neck and shoulders when pulling a wagon or plough .