دیکشنری تخصصی مهندسی نفت - نسخه آنلاین

borehole televiewer, a sonic tool that creates a sound reflectance picture of the wellbore.

n: a survey run in cased holes to locate the top of the cement in the annulus. Since cement generates a considerable amount of heat when setting, a temperature increase will be found at the level where cement is found behind the casing.

n: A record of the temperature gradient in a well. The temperature log is interpreted by looking for anomalies, or departures, from the reference gradient. This reference might be the geothermal gradient, a log recorded before production started or a log rec

a measurement of temperatures along the wellbore. Useful for determining temperatures at any point, static and circulating temperature and tops of cement column. May also be used to locate the top of a fracture if run soon after the frac.

n: an operation used to determine temperatures at various depths in the wellbore. It is also used to determine the height of cement behind the casing and to locate the source of water influx into the wellbore.

repeated, regular measurement of temperatures along a unit of depth in a well.

n: A formation encountered during drilling into which circulating fluids can be lost.


a high permeability streak that serve as a loss site for wellbore fluids.

n: Casing string be trip in the wellbore that its diameter smaller than the diameter of bit,then the casing string cannt trip in or pick up readily.

n: 1. a well about which information is restricted for security or competitive reasons. 2. a section of the hole that, for some reason, is undergauge. For example, a bit that is worn undergauge will drill a tight hole.

n: A section of a wellbore, usually openhole, where larger diameter components of the drillstring, such as drillpipe tool joints, drill collars, stabilizers, and the bit, may experience resistance when the driller attempts to pull them through these sections

an exploration well or other project where information is not released to the public.

n: the part of a deflection toolusually marked with a scribe line-that is oriented in a particular direction to make a predetermined deflection of the wellbore.

n: The perpendicular plane along the direction of application of kickover tool.

n: A kind of ways that injecting drill fluid into the annular or wellbore,which be used to control overflow and blowout.


a dynamic kill procedure, used in low pressure wells, good for a short period of time. A typical top kill is to pump 5 bbl of fluid in the tubing, offsetting the tubing pressure as the fluid falls. The well must be monitored for pressure or flow and the p

v: to fill a wellbore with fluid up to the surface.

n: a cement wiper plug that follows cement slurry down the casing. It goes before the drilling mud used to displace the cement from the casing and separates the mud from the sluny. See cementing, wiper plug.

in cementing, the last plug pumped in cementing with the two plug system. It isolates the displacement fluid and cement slurry. It helps keep the heavy cement slurry from reversing or U-tubing back into the wellbore while the cement slurry is still unset.