Casing collapse is one of the major problems in oil fields, imposing a lot of costs on oil companies. This problem occurs not only at drilling times in some formations but also after the completion and production can lead to many problems. Analysis of the behavior of casing collapse in terms of geo-mechanics and solid mechanics could significantly meet the needs of the oil industry of Iran. In ...

A good knowledge of the parameters causing casing damage is critically important due to vital role of casing during the life of a well. Cement sheath, which fills in the gap between the casing and wellbore wall, has a profound effect on the resistance of the casing against applied loads. Most of the empirical equations proposed to estimate the collapse resistance of casing ignore the effects of...

a good knowledge of the parameters causing casing damage is critically important due to vital role of casing during the life of a well. cement sheath, which fills in the gap between the casing and wellbore wall, has a profound effect on the resistance of the casing against applied loads. most of the empirical equations proposed to estimate the collapse resistance of casing ignore the effects of...

Well "X-01" is a slant (J-Type) directional well and will be subjected to appropriate technically qualified drilling casing planning in order prevent problems such as burst, collapse, tension that can cause increased internal external pressure loads experienced by the casing. The methodology used this research document study quantitative analysis using Drilling Software taking into account load...

Collapse failure under external pressure is one of the common forms casing. Much research has been performed on casing body, but few threaded connection, in view general belief that connection a thicker wall and larger collapse strength than body. However, pressure, sealing capacity worn will decrease due to deformation structure, so influence ability should be considered determine In this pape...

To study the distribution law of circumferential residual stress after casing expansion, using finite element explicit dynamic analysis method analyzed expansion process expandable casings under different rates. The obtained key technical parameters stress, average and elastic recovery along wall thickness direction expansion. It is recognized that maximum tensile locates in middle part directi...

With the development of highly-deviated well cementing techniques, rotating casing cementing technology has got more and more attention. The rotating casing technique can improve the displacement efficiency of cement paste, and then enhance the quality of well cementation. In the stuck section, the rotating casing can redress the well to make the casing run sequentially. The casing endures shea...

Improved yield and biological efficiency (BE) of Pleurotus eryngii var. eryngii were achieved by supplementation of substrate with a commercial delayed-release nutrient and use of a casing overlay. Yield increases of 14% were achieved from cased substrates that were supplemented at time of casing with delayed-release nutrient (Remo's). Use of a casing layer enhanced yield by 141% over non-cased...