دیکشنری تخصصی مهندسی نفت - نسخه آنلاین

n: the legal right of passage over public land and privately owned property;also the way or area over which the right exists. The width of a right-of-way varies according to contract specifications and individual easements, but it is generally between 50 and 100 feet (15 and 30 metres).

n: the pipe and special fittings used on floating offshore drilling rigs to establish a seal between the top of the wellbore, which is on the ocean floor, and the drilling equipment, located above the surface of the water. A riser pipe serves as a guide for the drill stem from the drilling vessel to the wellhead and as a conductor of drilling fluid from the well to the vessel. The riser consists of several sections of pipe and includes special devices to compensate for any movement of the drilling rig caused by waves. Also called marine riser pipe.

n: a cable that supports the marine riser while compensating for vessel movement.

n: the activity of assigning probabilities to the expected outcomes of a drilling venture.

a decision making tool that allows examination of the level and significance of workplace risk for humans, equipment, weather, operations or other conditions. Determines the probability of risk occurring, the impact the risk will have and how to mitigate

a description of a large volume water frac (ungelled water) where proppant sand is pumped at ¼ to ½ lb/gal. Normally at very high rates (25 to 50+ bpm). For very low permeability, non water sensitive formations.

abbr: root-mean-square value. See effective value.

n: The study of the physical characteristics and behavior of rock. rock mechanics can include analysis of and relationships between properties such as velocity, density, porosity, permeability, shear strength, and bending and crushing behavior, as well as th

the study of mechanical rock behaviors under changing loads and stresses.

n: a bellrank device that transmits the movement of the pushrod to the valves in an engine.

n: lightning arrester assembly using two rods end-to-end with the gap separating rods determining arcing voltage.

n: the rapid, whiplike motion of the rods in a sucker rod pumping system, caused by vibration of the rod string.