ABSTRACT
Make Hole: Drill. Makeup: Screw pipe joints together. Makeup Tongs: Specialized wrenches used for making up pipe connections. Makeup Water: Water supplied to replenish the water of a system. Male Coupling: The part of a connection with threads on the outside. Maltene: A cyclic compound associated with asphaltenes that helps keep asphaltene platelets in suspension. Managed Pressure Drilling: An adaptive drilling process used to precisely control the annular pressure prole throughout the wellbore (IADC denition). Management of Change: A process to understand all the implications of a change to a procedure. Mandrel: A round bar or tube (i.e., as in a packer) around which other parts are mounted. Manhole: An opening in a sewer provided for the purpose of permitting operators or equipment to enter or leave a sewer. Sometimes called an “access hole” or a “maintenance hole.” Manifest: Document containing a full statement of the ship’s cargo, extracted from the bill of lading. Manifold: A junction or center for connecting several pipes and selectively routing the ¤ow. Manifolds: A pipe spool in which a number of incoming pipes are combined to feed to a common output line. Manning Scales: The minimum number of ofcers and crew members that can be engaged on a ship to be considered as sufcient hands with practical ability to meet every possible eventuality at sea. Manometer: Instrument for measuring head or pressure; basically a U-tube partially lled with a liquid, so constructed that the difference in level of the liquid leg indicates the pressure exerted on the instrument. Mantle: The middle layer of the Earth, lying just below the crust and composed of relatively high-density rock. Manufactured Gas: (1) A gas obtained by destructive distillation of coal, or by the thermal decomposition of oil, or by the reaction of steam passing through a bed of heated coal or coke. Examples are coal gases, coke-oven gases, producer gas, blast furnace gas, blue (water) gas, and carbureted water gas. Btu content varies widely. (2) Gas produced by certain processes from oil, coal, or coke. MAOP: See Maximum allowable operating pressure. Maraseal: A Marathon Oil water/zone control chemical. For matrix shutoff. Marble: A metamorphic rock composed largely of calcite. Marcit: A Marathon Oil water/zone control chemical. For fracture shutoff. Mare’s Tail (Process Facility): A frayed rope-line strand inserted in a ¤ow line before a separator that aids in separation of entrained droplets in a ¤owing liquid.
