Changes

* Shearing caused by flexing the inner barrel

* Shearing caused by flexing the inner barrel

Soft sediment cannot be removed from a steel barrel without disrupting it. Therefore, a disposable inner barrel made of fiberglass, PVC, or aluminium can be used. The inner barrel is generally mated to a specific core catcher design (see “[[Conventional coring]]”).

Soft sediment cannot be removed from a steel barrel without disrupting it. Therefore, a disposable inner barrel made of fiberglass, PVC, or aluminum can be used. The inner barrel is generally mated to a specific core catcher design (see [[Conventional coring]]).

Well-designed equipment cannot alleviate the problems caused by poor handling. Since the core is hidden in the inner barrel, these problems are not noticed unless the core is CAT scanned. Scanning will determine the extent of damage and is an excellent aid to picking analysis plug points. Based on experience, the following steps are recommended to prevent damage:

Well-designed equipment cannot alleviate the problems caused by poor handling. Since the core is hidden in the inner barrel, these problems are not noticed unless the core is CAT scanned. Scanning will determine the extent of damage and is an excellent aid to picking analysis plug points. Based on experience, the following steps are recommended to prevent damage:

==See also==

==See also==

* [[Drilling problems]]

* [[Drilling problems]]

* [[Mudlogging: Drill cuttings analysis]]

* [[Mudlogging: drill cuttings analysis]]

* [[Introduction to wellsite methods]]

* [[Introduction to wellsite methods]]

* [[Wellbore trajectory]]

* [[Wellbore trajectory]]

* [[Rig personnel]]

* [[Rig personnel]]

* [[Wellsite math]]

* [[Wellsite math]]

* [[Mudlogging: Equipment, services, and personnel]]

* [[Mudlogging: equipment, services, and personnel]]

* [[Core alteration and preservation]]

* [[Core alteration and preservation]]

* [[Wellsite safety]]

* [[Wellsite safety]]

* [[Show evaluation]]

* [[Show evaluation]]

* [[Rate of penetration]]

* [[Rate of penetration]]

* [[Mudlogging: The mudlog]]

* [[Mudlogging: the mudlog]]

* [[Well planning]]

* [[Well planning]]

* [[Pressure detection]]

* [[Pressure detection]]

* [[Fishing]]

* [[Fishing]]

* [[Core orientation]]

* [[Core orientation]]

* [[Mudlogging: Gas extraction and monitoring]]

* [[Mudlogging: gas extraction and monitoring]]

==External links==

==External links==

[[Category:Wellsite methods]]

[[Category:Wellsite methods]]