- Industry: Oil & gas
- Number of terms: 8814
- Number of blossaries: 0
- Company Profile:
A series of alcohols with glycerol, C<sub>3</sub>H<sub>5</sub>(OH)<sub>3</sub>, (usually referred to as glycerin in the USA) being the simplest member. Polyglycerols have been used as shale inhibitors in water-base drilling fluids.
Industry:Oil & gas
A series of alcohols with general formula C<sub>2n</sub>H<sub>4n+2</sub>O<sub>n+1</sub>. The simplest member is ethylene glycol C<sub>2</sub>H<sub>6</sub>O<sub>2</sub>, widely used as antifreeze. Glycols may be used in drilling fluids as gas hydrate inhibitors.
Industry:Oil & gas
A salt of chromium in which chromium atoms are in the plus-3 valence state, such as chromic chloride, CrCl<sub>3</sub>. Chromic compounds are considered less harmful to the environment than chromates (plus-6 valence) because they are at a low oxidation state and not highly reactive.
Industry:Oil & gas
A self-contained combination drilling rig and floating barge, fitted with long support legs that can be raised or lowered independently of each other. The jackup, as it is known informally, is towed onto location with its legs up and the barge section floating on the water. Upon arrival at the drilling location, the legs are jacked down onto the seafloor, preloaded to securely drive them into the seabottom, and then all three legs are jacked further down. Since the legs have been preloaded and will not penetrate the seafloor further, this jacking down of the legs has the effect of raising the jacking mechanism, which is attached to the barge and drilling package. In this manner, the entire barge and drilling structure are slowly raised above the water to a predetermined height above the water, so that wave, tidal and current loading acts only on the relatively small legs and not the bulky barge and drilling package.
Industry:Oil & gas
A section of a wellbore, usually openhole, where larger diameter components of the drillstring, such as drillpipe tool joints, drill collars, stabilizers, and the bit, may experience resistance when the driller attempts to pull them through these sections.
Industry:Oil & gas
A sample of mud from the deepest or current drilling depth of a well. The term refers particularly to a mud sample that has experienced stagnant conditions at the bottom of the hole, including the temperature, pressure and other conditions at that depth. A bottoms-up sample is commonly collected after a trip out of the hole or if an influx of formation fluid is suspected.
Industry:Oil & gas
A salt of cesium hydroxide and acetic acid, with formula CH<sub>3</sub>COO<sup>-</sup>Cs<sup>+</sup>, used to make high-density completion fluids. It has neutral to alkaline pH in water solutions and has better temperature stability than cesium formate.
Industry:Oil & gas
A salt formed when a fatty acid reacts with a metal oxide or hydroxide. Fatty acids and lime, Ca(OH)<sub>2</sub>, form emulsifiers for oil muds. Fatty acids reacted with sodium hydroxide (NaOH) or potassium hydroxide (KOH) are laundry soaps, some used as foamers for air drilling. Fatty acids and aluminum hydroxide form soaps used as greases and as defoamer chemicals.
Industry:Oil & gas
A rigid metal conduit that provides the high-pressure pathway for drilling mud to travel approximately one-third of the way up the derrick, where it connects to a flexible high-pressure hose (kelly hose). Many large rigs are fitted with dual standpipes so that downtime is kept to a minimum if one standpipe requires repair.
Industry:Oil & gas
A rheological property of matter related to the cohesion of the individual particles of a given material, its ability to deform and its resistance to flow. The consistency of cement slurries is determined by thickening time tests in accordance with API Recommended Practice 10B and is expressed in Bearden units of consistency (Bc).
Industry:Oil & gas
