دیکشنری تخصصی مهندسی نفت - نسخه آنلاین

rotating the casing string during primary cementing to remove mud and improve primary cement bonding and isolation.

n: a procedure whereby the formation immediately below the casing shoe is subjected to a pressure equal to the pressure expected to be exerted later by the drilling fluid or by the drilling fluid and the back-pressure created by a kick. See leakoff test.

a LOT or an FIT test (check specifics for details),a pressurized test after primary cementing to make sure the bottom most seal with the formation will handle pressures needed for drilling the rest of the well.

n: the application of a liquid slurry of cement and water to various points inside or outside the casing. See primary cementing, secondary cementing. squeeze cementing. cementing barge n: a barge containing the cementing pumps and other equipment needed for oilwell cementing in water operations.

v: To prepare and pump cement into place in a wellbore. Cementing operations may be undertaken to seal the annulus after a casing string has been run, to seal a lost circulation zone, to set a plug in an existing well from which to push off with directional

n: originally a trademarked name. It is a stage cementing tool. used in selective zone primary cementing.

n: A component installed near the bottom of the casing string on which the cement plugs land during the primary cementing operation. The internal components of the landing collar are generally fabricated from plastics, cement and other drillable materials.

n: the cementing operation that takes place immediately after the casing has been run into the hole. It provides a protective sheath around the casing, segregates the producing formation, and prevents the undesirable migration of fluids.

n: placing cement around the casing immediately after it has been run into the hole.

the first attempt at creating a cement seal in the annulus.

n: 1. in cement evaluation work, the agitation of cement slurry with a rod to remove trapped air bubbles. 2. in field practice, the rotation of the casing during or after a primary cementing operation.

n: cement placed in a wellbore after the primary cementing has occurred. Remedial cementing is used to repair holes in the casing, fill voids left behind in casing after primary cementing, stop lost circulation, and so on. Compare primary cementing.

n: Cementing operations performed to repair primary-cementing problems or to treat conditions arising after the wellbore has been constructed. The two main categories of remedial Cementing include squeeze cementing and the placement of cement plugs.

repair cementing.

n: 1. d1e fundamental unit of time in the metric system. 2. in some countries, the crew member who relieves the toolpusber, or rig manager, and is second in command. secondary cementing n: any cementing operation after the primary cementing operation. Secondary cementing includes a plug-back job, in which a plug of cement is positioned at a specific point in the well and allowed to set. Wells are plugged to shut off bottom water or to reduce the depth of the well for other reasons.

n: Alll of the cementing work after primary cementing.


an inexact term. Any cementing after the primary cement job. Rarely used.