دیکشنری تخصصی مهندسی نفت - نسخه آنلاین

n: land owned by the United States, acquired by deed or otherwise. Such land has never been in the public domain or was in the public domain at one time and was later reacquired by purchase, condemnation, or donation.

n: an agreement between a producer and a purchaser to make an advance payment for gas to be delivered at a future date.

n pi: buyers who can purchase natural gas from only one supplier and have no access to alternate fuel sources. This term is usually applicable to residential and small commercial users, but can, under certain conditions of alternative fuel availability, be applied to large industrial and electric utility users as well. Also called core customers.

n: a contract used by industry for the purchase and sale of casinghead gas.

to run a pipe through a wellbore to determine if it is open.

v: to lower the drill stem rapidly a few feet into the hole and then stop it suddenly with the drawworks brake. A surge of pressure in the mud in the drill stem and annular space results and may help to flush out debris accumulated in or on die pipe. The pressure surge may break down a formation, however, causing lost circulation, or may damage the bit if it is near the bottom.

v: Landing the drill string speedily and then braking. This operation can produce stiring pressure to clean the cutting laying up in the drill pipe. But this pressure may lead to formation fracturing or circulation loss.

v: to clean and deburr the threads of a pipe so that it will make up properly.

n: The operation that cut down a part of joint and make new thread due to severe wornout of thread.

n: the maximum quantity of gas the seller is required to make available to the purchaser during a specified period under terms of a gas sales contract.

n: the minimum quantity of gas the seller is required to make available to the purchaser during a specified period under terms of a gas sales contract.

n pi: natural gas reserves dedicated to the fulfillment of gas purchase contracts.

reserves of hydrocarbon dedicated to fill a specific contract.