Oil and Gas Terms Beginning with “M” — Page 7
233 terms · Page 7 of 8
An acquisition technique most commonly used in electromagnetic methods whereby the energy source or transmitter and detectors or receivers are kept in the same relative position and moved together to different spots to… Read more →
Abbreviation for mils (thousandths of an inch) per year penetration, a unit of measurement for the corrosion rate of a coupon. Read more →
A term that is generally synonymous with drilling fluid and that encompasses most fluids used in hydrocarbon drilling operations, especially fluids that contain significant amounts of suspended solids, emulsified water… Read more →
A mixture of hydrofluoric acid [HF] and hydrochloric acid [HCl] or organic acid used as the main fluid in a sandstonematrix treatment. Hydrochloric acid or organic acid is mixed with HF to keep the pH low when it… Read more →
A material added to a drilling fluid to perform one or more specific functions, such as a weighting agent, viscosifier or lubricant. Read more →
A cylindrical vessel in which a mud sample can be heated under pressure. Cells, often called bombs, are routinely used for static-aging and hot-roll aging of mud samples. Cells are usually made of metal or metal alloy,… Read more →
Large diameter pipe placed outside the gas anchor to reduce the amount of solids carried by the formation liquid entering the subsurface sucker-rod pump. Read more →
A device to measure density (weight) of mud, cement or other liquid or slurry. A mud balance consists of a fixed-volume mud cup with a lid on one end of a graduated beam and a counterweight on the other end. A… Read more →
A desilter unit in which the underflow is further processed by a fine vibrating screen, mounted directly under the cones. The liquid underflow from the screens is fed back into the mud, thus conserving weighting agent… Read more →
A graduated cup used to take samples and to crudely measure volumes of mud for testing at the rig. A mud cup is used primarily with the Marsh funnel to measure one quart of flow out of the funnel. It is also used as a… Read more →
A person responsible for testing the mud at a rig and for prescribing mud treatments to maintain mud weight, properties and chemistry within recommended limits. The mud engineer works closely with the rig supervisor to… Read more →
A mud-flow device, also called a jet hopper, in which materials are put into the circulating mud system. The mud hopper is powered by a centrifugal pump that flows the mud at high velocity through a venturi nozzle (jet)… Read more →
The place where mud additives are kept at the rig, also known as the sack room. Read more →
A mud sample taken from the suction pit (the last pit in the flow series) just before the mud goes into the pump and down the wellbore. The in sample is also called the suction-pit sample, or "mud in" on a drilling… Read more →
What Is a Mud Motor? A mud motor converts the hydraulic energy of circulating drilling fluid into mechanical rotation of the drill bit, enabling the bit to turn independently of the drillstring. Deployed as the lowest… Read more →
A mud sample taken after it has passed from the flowline and through the shaleshaker screens to remove large cuttings. The out sample is also called the shale shaker sample. This mud has experienced the downhole… Read more →
An oven into which mud-testing cells are placed. Ovens usually have a set of horizontal rollers inside and are also called roller ovens. Mud-aging cells are placed on the rollers. In pilot tests, rolling the cells… Read more →
A large tank that holds drilling fluid on the rig or at a mud-mixing plant. For land rigs, most mud pits are rectangular steel construction, with partitions that hold about 200 barrels each. They are set in series for… Read more →
A formal plan developed for a specific well with predictions and requirements at various intervals of the wellbore depth. The mud program gives details on mud type, composition, density, rheology, filtration and other… Read more →
The report sheets filled out by the mud engineer at the wellsite on a daily basis. The mud report supplies results of tests performed several times per day as well as details about mud product usage, inventory,… Read more →
A type of nonreactive, easily differentiated material placed in a small portion of a circulating mud system at a certain time to be identified when it later returns to the surface from downhole. Mud tracers are used to… Read more →
What Is Mud Weight? Mud weight measures the density of drilling fluid circulating through the wellbore during drilling operations, expressed in pounds per gallon (ppg), kilograms per cubic meter (kg/m³), or specific… Read more →
A cylindrical vessel in which a mud sample can be heated under pressure. Cells, often called bombs, are routinely used for static-aging and hot-roll aging of mud samples. Cells are usually made of metal or metal alloy,… Read more →
A mud sample taken from the suction pit (the last pit in the flow series) just before the mud goes into the pump and down the wellbore. The in sample is also called the suction-pit sample, or "mud in" on a drilling… Read more →
A mud sample taken after it has passed from the flowline and through the shale shaker screens to remove large cuttings. The out sample is also called the shale shaker sample. This mud has experienced the downhole… Read more →
The action of coatingrock grains and plugging off the permeability of a productive reservoir during drilling. The term is seldom used today, but refers to formation damage by mud solids. By proper selection of solids,… Read more →
The act of adding commercial materials to convert water or a water-clayslurry into a mud. Mudding up is usually done after drilling a well to a certain depth with relatively inexpensive spud mud or other native-clay… Read more →
A fine-grained detritalsedimentaryrock formed by consolidation of clay- and silt-sized particles. Mudrocks are highly variable in their clay content and are often rich in carbonate material. As a consequence, they are… Read more →
A device for measuring in situ the velocity of fluid flow in a production or injection well by measuring the transit time of a disturbance between two dielectric sensors a fixed distance apart. The device is a type of… Read more →
Seismic data acquired in a land, marine, or borehole environment by using more than one geophone or accelerometer. 3C seismic data, a type of multicomponent seismic data, uses three orthogonally oriented geophones or… Read more →