دیکشنری تخصصی مهندسی نفت - نسخه آنلاین

n: a device mounted near the drawworks drum to keep the driller from inadvertently raising the travelling block into the crown block. A probe senses when too much line has been pulled onto the drum, indicating that the travel block is about to strike the crown. The probe activates a switch that simultaneously disconnects the drawworks from its power source and engages the drawworks brake.

a device that keeps the traveling block from being raised ito the crown block.

n: A kind of protecting device avoiding the accident that hoisting block collides with crown block due to error or faulty operation in the process of pulling out the hole.

n: unrefined liquid petroleum. It ranges in gravity from 9. API to 55. API and in colour from yellow to black. and may have a paraffin, asphalt, or mixed base. If a crude oil, or crude, contains a sizeable amount of sulphur or sulphur compounds, it is called a sour crude;if it has little or no sulphur, it is called a sweet crude. In addition, crude oils may be referred to as heavy or light according to API gravity, the lighter oils having the higher gravities.

n: The petroleum which is not being processed.

the temperature at which the first crystal of salt appears from a brine that is being cooled.

n: rock texture that is the result of progressive and simultaneous interlocking growth of mineral crystals. Compare clastic texture.

n: the formation of crystals from solutions or melts.

n: The temperature of a brine at which salt crystals begin to fall out of solution. There are three temperatures relative to crystallisation occurring: first crystal to appear (FCTA),true crystallization temperature (TCT),and last crystal to dissolve (LCTD

n: The chemical used in saturated saltwater mud to prevent recrystallization due to the difference of BHT.

n: (ft3) the volume of a cube, all edges of which measure I foot. Natural gas in the United States is usually measured in cubic feet. with the most common standard cubic foot being measured at roof and 14.65 pounds per square inch absolute, although base conditions vary from state to state.

n: The glass test tube with hydrofluoric acid when deviational survey.