Perforations definition

Perforations means a series of openings in a casing, made either before or after installation of the casing, to permit the entrance of water into the well.

Examples of Perforations in a sentence

  • Perforations shall be situated with regard to the need to prevent excessive air infiltration.

  • Perforations must be situated with regard to the need to prevent excessive air infiltration.

  • Perforations in the vent screen shall not exceed 0.125 inches in diameter.

  • Secondary backing must have Drainage Perforations: 3/16” to ¼” diameter at 4 inches or less on center each way.

  • Perforations shall be located not less than 30º or more than 60º from the vertical on either side of the center line of the bottom of the pipe.

  • Perforations must be no smaller than 3/8 inch and no larger than ¾ inch in diameter.

  • Perforations: There must be two rows of evenly spaced perforations running the length of the distribution pipe.

  • Perforations must maintain consistent diameter through the face material and backer with no tapering or roughness.

  • Perforations shall be required for tubing used as a longitudinal underdrain.

  • Perforations holes shall be drilled straight into the pipe and not at an angle.

Related to Perforations

  • Drill means a response to a planned, simulated event.

  • borehole means a hole sunk into the earth for the purpose of locating, abstracting or using subterranean water and includes a spring;

  • exploration area means that part of the Area allocated to the Contractor for exploration, described in schedule 1 hereto, as the same may be reduced from time to time in accordance with this contract and the Regulations;

  • Casing means a pipe or tubing of appropriate material, of varying diameter and weight, lowered into a borehole during or after drilling in order to support the sides of the hole and thus prevent the walls from caving, to prevent loss of drilling mud into porous ground, or to prevent water, gas, or other fluid from entering or leaving the hole.

  • Exploration Operations means operations conducted in the Contract Area pursuant to this Contract in searching for Petroleum and in the course of an Appraisal Programme and shall include but not be limited to aerial, geological, geophysical, geochemical, palaeontological, palynological, topographical and seismic surveys, analysis, studies and their interpretation, investigations relating to the subsurface geology including structural test drilling, stratigraphic test drilling, drilling of Exploration Xxxxx and Appraisal Xxxxx and other related activities such as surveying, drill site preparation and all work necessarily connected therewith that is conducted in connection with Petroleum exploration.

  • drilling means the act of boring a hole to reach a proposed bottom hole location through which oil or gas may be produced if encountered in paying quantities, and includes redrilling, sidetracking, deepening, or other means necessary to reach the proposed bottom hole location, testing, logging, plugging, and other operations necessary and incidental to the actual boring of the hole;

  • Production Operations means all operations conducted for the purpose of producing Petroleum from the Development Area after the commencement of production from the Development Area including the operation and maintenance of all necessary facilities therefor.

  • Carpet Area means the net usable floor, area of an Flat/Apartment, excluding the area covered by the external walls, areas under services shafts, excluding balcony or verandah area and exclusive open terrace, but includes the area covered by the internal partition walls of the flat/apartment;

  • Drainage area means a geographic area within which stormwater, sediments, or dissolved materials drain to a particular receiving waterbody or to a particular point along a receiving waterbody.

  • Lot depth means the horizontal distance between the front and rear lot lines.

  • Exploration means all activities directed toward ascertaining the existence, location, quantity, quality or commercial value of deposits of Products.

  • Tailings means material rejected from a mill after most of the valuable minerals have been extracted.

  • Gasification means the substoichiometric oxidation or steam reformation of a substance to produce a gaseous mixture containing two or more of the following: (i) oxides of carbon; (ii) methane; and (iii) hydrogen;

  • Diameter means the diameter of the stem of a tree measured outside the bark at a specified point of measurement.

  • Scale means the height, width and length of each building proposed within the development in relation to its surroundings;

  • Drilling operations means the drilling of an oil and gas well and the production and completion operations ensuing from the drilling which require entry upon the surface estate and which were commenced after June 30, 1979, and oil and gas geophysical and seismograph exploration activities commenced after June 30, 1983.

  • Pipelines means those pipelines within the Storage Facility that connect the Tanks to one another and to the receiving and delivery flanges of the Storage Facility.

  • Production Area means that part of the animal feeding operation that includes the animal confinement area, the manure storage area, the raw materials storage area, and the waste containment areas. The animal confinement area includes, but is not limited to, open lots, housed lots, feedlots, confinement houses, stall barns, free stall barns, milkrooms, milking centers, egg washing or egg processing areas, areas used for the storage and disposal/treatment of mortalities, cowyards, barnyards, medication pens, walkers, animal walkways, and stables. The manure storage area includes, but is not limited to, lagoons, runoff ponds, storage sheds, stockpiles, under-house or pit storages, liquid impoundments, static piles, and composting piles. The raw materials storage area includes, but is not limited to, feed silos, and silage bunkers. The waste containment area includes, but is not limited to, settling basins and areas within berms and diversions which separate uncontaminated stormwater.

  • Overburden means any material of any nature, consolidated or unconsolidated, that overlies a mineral deposit, excluding topsoil or similar naturally occurring surface materials that are not disturbed by mining operations.

  • High terrain means any area having an elevation 900 feet or more above the base of the stack of a source.

  • Power production activities means any business operation that involves a project commissioned by the government of Iran whose purpose is to facilitate power generation and delivery, including, but not limited to, establishing power-generating plants or hydroelectric dams, selling or installing components for the project, providing service contracts related to the installation or maintenance of the project, as well as facilitating such activities, including by providing supplies or services in support of such activities.

  • Uppermost aquifer means the geologic formation nearest the natural ground surface that is an aquifer, as well as lower aquifers that are hydraulically interconnected with this aquifer within the facility's property boundary.

  • mineralization means the concentration of metals and their chemical compounds within a body of rock;

  • Hydraulic fracturing means the fracturing of underground rock formations, including shale and non-shale formations, by manmade fluid-driven techniques for the purpose of stimulating oil, natural gas, or other subsurface hydrocarbon production.

  • AREA OF OPERATIONS means the Company's oilfield operations in the States of Assam and Arunachal Pradesh.

  • Operating pressure means the pressure at which the parts of an irrigation system are designed by the manufacturer to operate.