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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.
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-shaped tool with a tamper at one end and a reamer at the other. Tampers and reamers are also made as separate tools.
Ream may refer to: Paper ream, unit of 500 sheets of paper; Ream (surname) Reamer, tool used to widen a hole; Ream, West Virginia; Ream, the name of Rama in the Khmer version of the Ramayana, the Reamker; Ream National Park, a national park in Cambodia; Ream Naval Base, Sihanoukville, Cambodia
A bottom hole assembly (BHA) is a component of a drilling rig.It is the lowest part of the drill string, extending from the bit to the drill pipe.The assembly can consist of drill collars, subs such as stabilisers, reamers, shocks, hole-openers, and the bit sub and bit.
Plastic tubing cutters, which resemble a pair of pruning shears, may be used for thinner pipes and tubes, such as sprinkler pipe. For use on thicker pipes, there is a pipecutter with a sharp wheel and adjustable jaw grips. These are used by rotating it around the pipe and repeatedly tightening it until it cuts all of the way through. [1]
Reaming itself can be conducted either in an existing borehole ("pilot reaming") or during the drilling operation ("reaming while drilling"). Underreaming is primarily used to allow a wider clearance for running and cementing the casing correctly, either due to restrictions (swelling shales, tortuosity) or to be able to run a larger casing size.