- 行业: Oil & gas
- Number of terms: 8814
- Number of blossaries: 0
- Company Profile:
Разговорный термин для члена экипажа, отвечающий за специализированное тампонажное экипажа и грузовых автомобилей.
Industry:Oil & gas
The chemical CaSO<sub>4</sub>, which occurs naturally as the mineral anhydrite. Gypsum is the dihydrate mineral form, CaSO<sub>4</sub>路2H<sub>2</sub>O. Anhydrite and gypsum (commonly called gyp) are found in the subsurface and drilling even small stringers of these minerals can upset a freshwater or seawater mud. Gyp muds, lime muds and oil muds tolerate these salts best. CaSO<sub>4</sub> is used as a mud treatment when no pH increase is needed to remove carbonate ion contamination in freshwater and seawater muds. (Lime increases pH when added for this purpose. ) Gypsum and lime treatments are often used together to keep pH in the proper range. The test for determining the dissolved and undissolved calcium sulfate in a gyp mud requires two titrations with the strong EDTA reagent and Calver II庐 indicator when performed to API standards. It also requires a retort analysis for water content in the mud in order to calculate CaSO<sub>4</sub> content, lbm/bbl.
Industry:Oil & gas
The characteristic of a fluid, such as a drilling mud, to form a gelled structure over time when not subject to shearing and then to liquefy when agitated. The viscosity of a thixotropic fluid changes with time under constant shear rate until reaching equilibrium. Most drilling muds exhibit thixotropy, which is necessary for fast drilling, efficient cuttings lifting and to support weighting material when mud flow stops. Gel strength measured at various time intervals indicates the relative thixotropy of a mud. <br><br>Thixotropy is sometimes desirable to provide resistance to flowing, such as to avoid or reduce losses or flow into a weak formation.
Industry:Oil & gas
Характеристика буровой жидкости или грязи продукта, относящиеся к его ответ на длительное Отопление, обычно в контролируемых грязи композиции в тесте прокатки или статическое старение.
Industry:Oil & gas
The casing string that is usually put into the well first, particularly on land wells, to prevent the sides of the hole from caving into the wellbore. This casing, sometimes called drive pipe, is generally a short length and is sometimes driven into the ground. Conductor pipe is run because the shallow section of most wells onshore is drilled in unconsolidated sediment or soil rather than consolidated strata typically encountered deeper. Offshore, the drive pipe or structural casing may be installed prior to the conductor for similar reasons.
Industry:Oil & gas
Нижней части обсадной колонны, в том числе цемент вокруг него, или оборудования, запуск в нижней части обсадной колонны.
Industry:Oil & gas
The amount of pressure (or force per unit area) in the wellbore that exceeds the pressure of fluids in the formation. This excess pressure is needed to prevent reservoir fluids (oil, gas, water) from entering the wellbore. However, excessive overbalance can dramatically slow the drilling process by effectively strengthening the near-wellbore rock and limiting removal of drilled cuttings under the bit. In addition, high overbalance pressures coupled with poor mud properties can cause differential sticking problems. Because reservoir pressures vary from one formation to another, while the mud is relatively constant density, overbalance varies from one zone to another.
Industry:Oil & gas
Количество давления (или силы на единицу площади), оказываемое на формирование в скважине ниже внутреннего давления жидкости этого формирования. Если существует достаточной пористости и проницаемости, пластовых флюидов введите скважины. Бурения ставка обычно увеличивается с приближением предложен условие.
Industry:Oil & gas
Количество кислорода, потребляемого процессов биодеградации в стандартизированных тестов. Тест обычно включает в себя деградации органического вещества в выброшенных отходов или сточных вод.
Industry:Oil & gas
