دیکشنری تخصصی مهندسی نفت - نسخه آنلاین

n: The anchor screw of derrick mask.

v: (slang) to cave in;to fail. After a violent blowout, the force of the fluids escaping from the wellbore sometimes blows a large hole in the ground. In this case, the well is said to have cratered. Equipment craters when it fails.

n: The formation of a large funnel-shaped cavity at the top of a hole resulting from either a blowout or from caving.

n pi: penalties (fines or imprisonment) for damages against society or government, typically determined by court cases brought against individuals or corporations.

n: weight placed on the bit that results in tension on the drill string, which causes the mill string to vibrate at tile rotary speed being used. A drill stem operating with critical weight and at the critical speed for that weight will have stresses develop that cause very rapid failure.

n: an area in which particular subsurface formations make it difficult to keep a drilled hole straight.

n: A wellbore that has deviated from the vertical. Crooked holes usually occur where there is a section of alternating hard and soft strata steeply inclined from the horizontal.

a wellbore drilled in excess of the maximum allowable dogleg.

n: when several producers, either voluntarily or by state regulation, pool acreages to form a unit." They may cross-assign their leases to one another, creating a common obligation to each royalty owner.

n: a process of molecular bridging of polymers with other chemical substances that alters viscosity and shear rates to enhance lifting of bit cuttings and increase drilling rates.

n: I. the crown block or top of a derrick or mast. 2. the top of a piston. 3. a high spot formed on a tool joint shoulder as the result of wobble.

n: The top of the derrick containing the blockline sheaves.

high point.