- Отрасли: Oil & gas
- Number of terms: 8814
- Number of blossaries: 0
- Company Profile:
A balanced plug of cement slurry placed in the wellbore. Cement plugs are used for a variety of applications including hydraulic isolation, provision of a secure platform, and in window-milling operations for sidetracking a new wellbore.
Industry:Oil & gas
A ball-shaped vessel used for fluid separation. A spherical separator can be used for two-phase or three-phase separation purposes. <br><br>Spherical separators are less efficient than either horizontal or vertical cylindrical separators and are seldom used. Nevertheless, their compact size and ease of transportation have made them suitable for crowded processing areas.
Industry:Oil & gas
A ball that is dropped or pumped through the wellbore tubulars to activate a downhole tool or device. When the ball is located on a landing seat, hydraulic pressure generally is applied to operate the tool mechanism.
Industry:Oil & gas
Natural or induced production impairments that can develop in the reservoir, the near-wellbore area, the perforations, the gravel-pack completion or the production pipelines, such as the tubing. Natural damage occurs as produced reservoir fluids move through the reservoir, while induced damage is the result of external operations and fluids in the well, such as drilling, well completion, workover operations or stimulation treatments. Some induced damage triggers natural damage mechanisms. <br /><br />Natural damage includes phenomena such as fines migration, clay swelling, scale formation, organic deposition, including paraffins or asphaltenes, and mixed organic and inorganic deposition. Induced damage includes plugging caused by foreign particles in the injected fluid, wettability changes, emulsions, precipitates or sludges caused by acid reactions, bacterial activity and water blocks. <br /><br />Wellbore cleanup or matrix stimulation treatments are two different operations that can remove natural or induced damage. Selecting the proper operation depends on the location and nature of the damage.
Industry:Oil & gas
To unscrew drillstring components downhole. The drillstring, including drillpipe and the bottomhole assembly, are coupled by various threadforms known as connections, or tool joints. Often when a drillstring becomes stuck it is necessary to "back off" the string as deep as possible to recover as much of the string as possible. To facilitate the fishing or recovery operation, the backoff is usually accomplished by applying reverse torque and detonating an explosive charge inside a selected threaded connection. The force of the explosion enlarges the female (outer) thread enough that the threaded connection unscrews instantly. A torqueless backoff may be performed as well. In that case, tension is applied, and the threads slide by each other without turning when the explosive detonates. Backing off can also occur unintentionally.
Industry:Oil & gas
Pour dévisser les composants de train de tiges, qui sont couplés par divers threadforms connus comme connexions, y compris les joints de l'outil et autres raccords filetés.
Industry:Oil & gas
Démonter des équipements pour le stockage et la portabilité. Équipement généralement doit être déconnecté de la source de puissance, découplée des systèmes sous pression, démonté et déplacé sur le sol de la plate-forme ou même désactiver emplacement.
Industry:Oil & gas
กรดอินทรีย์ชนิดหนึ่งได้มาจากสัตว์ และผักไขมัน และน้ำมัน กรดไขมันเป็นวัสดุดิบที่ใช้ในการผลิตสารน้ำมันเจาะหลาย emulsifiers ตัวแทนที่เปียกน้ำมัน และหล่อลื่น กรดไขมันสูงน้ำมันที่กลั่นจากไม้สน สัตว์ และผักไขมัน และน้ำมันเป็นระดับไตรกลีเซอไรด์ ซึ่ง hydrolyzed ให้กรดไขมัน (และกลีเซอร) กรดไขมันจากสัตว์เป็นส่วนใหญ่อิ่มตัวกรด มีพันธบัตรเดี่ยวระหว่างอะตอมคาร์บอน ผลตอบแทนสูงน้ำมันและน้ำมันพืชหลักทั้งอิ่มตัวและกรดไขมันในระดับที่สม (คู่ - และทริปเปิลพันธบัตร)
Industry:Oil & gas
A compound with formula CaCO<sub>3</sub> that occurs naturally as limestone. Ground and sized calcium carbonate is used to increase mud density to about 12 lbm/gal (1. 44 kg/m<sup>3</sup>), and is preferable to barite because it is acid-soluble and can be dissolved with hydrochloric acid to clean up production zones. Its primary use today is as a bridging material in drill-in, completion and workover fluids. Sized calcium carbonate particles, along with polymers, control fluid loss in brines or drill-in, completion and workover fluids. Insoluble calcium carbonate is the precipitated byproduct of mud treatments used for removal of either Ca<sup>+2</sup> or CO<sub>3</sub><sup>-2</sup> by addition of the other ion.
Industry:Oil & gas
A highly soluble calcium salt of formula CaCl<sub>2</sub> used to make drilling and workover fluids or brines with a density range from 8. 33 to 11. 6 lbm/gal (1. 39 g/cm<sup>3</sup>) at saturation. CaCl<sub>2</sub> can be blended with other brines, including sodium chloride (NaCl), calcium bromide (CaBr<sub>2</sub>) and zinc bromide (ZnBr<sub>2</sub>). Emulsification of CaCl<sub>2</sub> brine as the internal phase of oil-base or synthetic-base mud is an important use because the brine provides osmotic wellbore stability while drilling water-sensitive shale zones.
Industry:Oil & gas
