دیکشنری تخصصی مهندسی نفت - نسخه آنلاین

n: a tool used to obtain cylindrical samples of rock and other materials from the wellbore.

v: Cover well head to prevent objects dropping into the wellbore.

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.

collapse of part of the formation into the wellbore during drilling or completions.

n: a wellbore that has been unintentionally drilled in a direction other than vertical. It usually occurs where there is a section of alliterating hard and soft strata steeply inclined from the horizontal.

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: The jet stream flows along bottom due to resistance of bottom in jet drilling. It is favour of cleaning cuttings.

flow between formations via a connected wellbore. Crossflow, as seen by downhole cameras, can occur with the wellbore full of fluid and the appearance of a dead well at surface.

n: a holder for a mercury-in-glass thermometer that incorporates a small metal container into which the bulb of the thermometer is inserted and that serves to hold a small sample of liquid the temperature of which is being measured. The liquid in the cup keeps the bulb sub-merged in liquid until the temperature is recorded.

n: the injection of steam into the rock surrounding a production well to lower the viscosity of heavy oil and increase its flow into the wellbore. Steam injection may be followed by immediate production or by closing the well (called the soak phase) to allow even heat distribution before production is begun. The cycle of injection, soak, and production is repeated as long as the oil yield is profitable. Also called steam soak and huff n puff.

n: Refers to the annular between drill collar and wellbore.