دیکشنری تخصصی مهندسی نفت - نسخه آنلاین

n: a larger type of self-contained breathing gear that provides from 30 to 60 minutes of air. This apparatus differs from the emergency escape unit mainly in the size of the air bottle and, hence, in its capacity to store air. Compare emergency escape unit.

n: the outer shell of a downhole plunger pump. The pumping cycle starts with an upward stroke of the rods, which pulls the plunger up through the working barrel. On the upstroke, the traveling valve closes, the standing valve in the working barrel opens, fluid above the traveling valve is lifted out of the well, and a new charge is drawn into the pump. On the downstroke, the traveling valve opens, the standing valve closes, and the fluid is forced from the working barrel through the traveling valve in the plunger and into the tubing. Repeated strokes bring the fluid to the surface.

It can express the life of bearing of drilling that have given type bit and media.

n: the volume of gas in an underground storage reservoir above the designed level of the base. It mayor may not be completely withdrawn during any particular withdrawal season.

n: the interest in oil or gas that includes responsibility for all drilling, developing, and operating costs. Also called leasehold interest, operating interest.

an interest in an oil and natural gas lease that gives the owner of the interest the right to drill for and produce oil and natural gas on the leased acreage and requires the owner to pay a share of the costs of drilling and production operations.

n: the maximum pressure at which an item is to be used at a specified temperature.

the pressure rating that continuous operations may take place at the set conditions and fluids. Examples – e.g., WP set at 80% of rated burst for new pipe, 70% for used pipe, 50% for welded or damaged pipe.