دیکشنری تخصصی مهندسی نفت - نسخه آنلاین

n: according to IADC regulation of fixed blade bit classification, the drilling bit cut plane that the height of gauge diameter and the counterbore belows the 1/8 cut plane of drilling bit . The coring bit difference of inner and outside diameter substitud

n: stopping drilling to circulate and pulling the bit to above the section of the drilling, then lowering the bit and begins to drill, that is called short trip.

pulling the pipe up the hole several stands and returning to bottom. May be used to check for fill or to clear cuttings out of a section of the well.

n: short length turbodrill, generally about 4 to 6 meter, mainly used to improving the ability of angle build.

n: the displacing of wellbore fluids from the annulus up the tubing. Compare long way.

n: a full-sized ell or tee upstream and downstream of a meter. short full-pitch crossover n: angled grooves on a drum.

n: 1. a charge of high explosive, usually nitroglycerine, detonated in a well to shatter the formation and expedite the recovery of oil. Shooting has been almost completely replaced by formation fracturing and acid treatments. 2. a point at which a photograph is made in a single-shot survey. See directional survey.

n: the use of steel shot (ball bearings) in the drilling mud to hit the bottom of the hole as the shot leaves the bit jet with the mud, Experiments have shown that the rate of penetration is improved in some circumstances, but difficulties with handling the shot in the mud system have precluded wide use.

number of perforations per unit length.

a wellbore where an explosive such as nitroglycerin has been exploded.

a shallow wellbore filled with explosives and shot as a seismic signal.