دیکشنری تخصصی مهندسی نفت - نسخه آنلاین

n: all or a fractional part of the interest of a lessee (grantee) under an oil and gas lease. Such interest includes the lessees right to search for, drill, and produce oil and gas from a lease tract subject to royalty payments. The term usually refers to the remaining leasehold or working interest exclusive of any nonoperating interests created and assigned therefrom, such as overriding royalty interests and production payments. Also called operating interest, working interest.

n: in pipeline construction, the coating applied to pipe over the ditch. Coal tar enamels are particularly effective.

n: the flow range over which the meter factor does not deviate from specified limits.

n: 1. a string of pipe used to case open hole below existing casing. A liner extends from the setting depth up into another string of casing, usually overlapping about 100 feet (30.5 metres) above the lower end of the intermediate or the oil string. Liners are nearly always suspended from the upper string by a hanger device. 2. a relatively short length of pipe with holes or slots that is placed opposite a producing formation. Usually, such liners are wrapped with specially shaped wire that is designed to prevent the entry of loose sand into the well as it is produced. They are also often used with a gravel pack. 3. in jet perforation guns, a conically shaped metallic piece that is part of a shaped charge. It increases the efficiency of the charge by increasing the penetrating ability of the jet. 4. a replaceable tube that fits inside the cylinder of an engine or a pump. See cylinder linel:

n: a string of the casing that only extends back to inside the previous casing shoe and not back to surface as other casing strings do.

the inner liner over the propellant in a perforating charge, most often made of pressed, powdered copper mixture or drawn or stamped from copper sheet. The liner deforms as the charge is fired and its mass is added to that of the jet from the charge.

n: a stressed-steel corrugated tube that is lowered into existing casing in a well to repair a hole or leak in the casing. The patch is cemented to the casing with glass fibre and epoxy resin.

n: A downhole assembly or tool system used in the remedial repair of casing damage, corrosion or leaks. Casing patches are most frequently used as short- to medium-term repairs that enable production to be resumed until a major workover operation is schedule

n: see geostatic pressure.

n: see geostatic pressure.

overburden pressure of rocks at a depth.

a workover done without killing the well (with wellhead pressure and proper barriers).

n: 1. in mechanics, the weight or pressure placed on an object. The load on a bit refers to the amount of weight of the drill collars allowed to rest on the bit. See weight on bit. 2. in reference to engines. the amount of work that an engine is doing;for example, 50 percent load means that the engine is putting out 50 percent of the power that it is able to produce. 3. the amount of gas delivered or required at any specified point or points on a system;load originates primarily at the gas-consuming equipment of the customer. v:1. to engage an engine so that it works. Compare idle. 2. to set a governor to maintain a given pressure as the rate of gas flow through the governor varies. Compare demand.

n: a weather forecast covering more than a week in advance (sometimes for a month or a season).