Wall Thickness
Specified wall thickness of pipe without adding an allowance to compensate for the underthickness tolerances permitted in approved specifications.
Warranty Contract
A purchase agreement where the supplier (producer) agrees to supply a specified volume of natural gas over a specified period of time and warrants that it has sufficient reserves to meet its commitments over the life of the contract.
Removal of impurities from a gas or vapor by passing the gas through water or other liquid which retains or dissolves the impurity.
A shell with internal baffler or packing, so arranged that gas to be cleaned passes up through the baffles counter-current to the flow of scrubbing liquid down through the washer. The baffler or packing causes intimate contact and mixing of the gas with the liquid stream.
Washer Cooler
A washer in the form of a tall tower in which the washing liquid is sprayed in at top is collected in the bottom of the tower and then is cooled and recycled through the tower. Serves a dual purpose of washing the gas free of impurities and also cooling the gas.
Waste Gas
Water Gas (Blue Gas)
Made by passing steam over hot coke or other carbonaceous material; it consists of carbon monoxide and hydrogen with varying amounts of carbon dioxide and nitrogen. It burns with a blue flame.
Water Heater Blanket
Insulated wrap attached to a water heater which supplements the insulation contained in the water heater.
Water Heater Efficiency Measures
Energy Factor (EF) - A measure of the overall efficiency of a water heater based on its recovery efficiency, standby loss and energy input as set out in the standardized Department of Energy test procedures.
Water Heater--Direct, Fired
An appliance for producing hot water for domestic or commercial purposes other than for space heating.
Water Piping System, Closed
A heating system utilizing an air tank which provides a means of pressurizing the system for operation over a wide range of conditions and of circulating water which is used as a heat medium.
Water to Carbon Ratio
The ratio by weight of the amount of water to carbon compounds in a gas (vapor) stream.
Water Year
Measured water flow during a 12-month period starting October 1st and continuing to September 30th of the following year.
Water, Jacket
In a compressor or engine, the water used for cooling the cylinder head and/or walls.
Water, Make-Up
Water-Cooling Tower
A device for evaporative cooling of water by contact with air.
The reduction of air infiltration by methods such as caulking and weatherstripping.
Weight, Specific
Weight per unit volume of a substance.
Weighted Average Cost of Gas (Wacog)
The weighted average cost of gas purchases by a natural gas pipeline.
Weighted Cost
A combination of Actual Cost and Fair Value in rate base determination. See ACTUAL COST, FAIR VALUE.
Well Input
Well Land Rights
Right to drill and operate storage wells in a storage reservoir.
Well, Development
A well drilled in order to obtain production of gas or oil known to exist.
Well, Disposal
A deep well in which to inject waste chemicals, etc., such as a well to dispose of salt brine from the solution mining of salt dome gas storage caverns.
Well, Exploratory
A well drilled to a previously untested geologic structure to determine the presence of oil or gas.
Well, Gas
A well which produces at surface conditions the contents of a gas reservoir; legal definitions vary among the states.
Well, Marginal
A well which is producing oil or gas at such a low rate that it may not pay for the drilling.
Well, Observation
Well, Output
Well, Storage
Well, Stripper
Nonassociated gas well capable of producing no more than 90 Mcf/day at its maximum rate of flow.
Well, Wildcat
An exploratory well being drilled in unproven territory, that is, in a horizon from which there is no production in the general area.
The assembly of fittings, valves, and controls located at the surface and connected to the flow lines, tubing, and casing of the well so as to control the flow from the reservoir.
Wellhead Price
The cost of gas as it comes from the well excluding cleaning, compression, transportation, and distribution charges.
Welsbach Mantle Lamp (Incandescent Mantle Lamp)
A type of lamp in which the flame impinges on a knitted cup or mantle saturated with certain chemical compounds that are heated to incandescence and emit a bright, white light.
Wet Gas
Weymouth Formula
A formula for calculating gas flow in large diameter pipelines. Compare PANHANDLE FORMULA.
The transportation of customer-owned gas by a transmission company for the customer at a pre-determined cost to the customer.
A long, steel casing that uses an inclined plane to deflect the drill bit for control in directional drilling.
One who drills wells in the hope of finding gas or oil in territory not known to be a gas or oil field.
Wind Chill Factor
The equivalent temperature resulting from the combined effect of wind and temperature. For example: At 10 degrees Fahrenheit above 0 with a 20-mile per hour wind, the effect is the same as 24 degrees Fahrenheit below 0 without wind. See also CHILL FACTOR.
Wind Load Rating
A specification used to indicate the resistance of a derrick to the force of wind. The wind load rating is calculated according to formulas incorporated in API specifications. Typical wind resistance of derricks is 75 miles per hour with pipe standing in the derrick and 115 miles per hour and more with no pipe standing in the derrick.
Withdrawn Gas
Wobbe Index
A number which indicates interchangeability of fuel gases and is obtained by dividing the heating value of a gas by the square root of its specific gravity.
To perform one or more of a variety of remedial operations on a producing well with the hope of restoring or increasing production.
Working (Operating) Interest
The interest in a mineral property which entitles the owner to the production from the property, usually subject to a royalty and sometimes to other nonoperating interests. A working interest permits the owner to explore, develop, and operate the property.
Working Capital
Money necessarily invested in the business to carry on the day-to-day operations. Working capital includes: 1) Cash working capital requirements; 2) Average monthly balances of: a) materials and supplies (inventory) b) prepayments (i.e., taxes, rents, insurance) c) gas held in storage for current use (inventory) d) advance payments on gas purchases. The Natural Gas Act permits the recognition of a working capital allowance in the rate base.
Working Capital
The amount of cash or other liquid assets that a company must have on hand to meet the current costs of operations until such a time as it is reimbursed by its customers. Sometimes it is used in the narrow sense to mean the difference between current and accrued assets and current and accrued liabilities.
Working Gas
Gas in an underground storage field that is available for market. See STORAGE, UNDERGROUND.
A new, inexperienced worker in the oil patch.

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