Drilling and Completion
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...CONTENTS...
Functions of casing
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Types of Strings of Casing
DRIVE PIPE
CONDUCTOR PIPE
Ashort string of casing of a large dimeter which is normmally the first casing string to be run in the hole
Surface Casing
Astring of casing set in a wellbore to case off any fresh water sands at shallow depths and it set below the conductor pipe
Astring of casing set in a wellbore to case off any fresh water sands at shallow depths and it set below the conductor pipe
Intermediate Casing
Astring of casing set in the borehole to prevent the hole from caving and seal off formation
Astring of casing set in the borehole to prevent the hole from caving and seal off formation
Production Casing
Acasing string which used as aproduction tubing to run complet the well for production
Acasing string which used as aproduction tubing to run complet the well for production
Liners
Astring of casing which placed at which awell is to be drilled and used to save the money of drilling
Example Hole and String Sizes
Casing in exploration well
Casing in development well
Running the casing
Casing Collar
Test BOP Sytem
Installing the Casing
Hanger
Making perforation
Running production tubing
Casing Accessories
Guide show
is used to guide the csg through doglegs and restriction in the hole and to protect lower edge of the csg
is used to guide the csg through doglegs and restriction in the hole and to protect lower edge of the csg
Float shoe
Guide show contains avalve element(ballor flapper )prevents cement from flowing back into csg
Guide show contains avalve element(ballor flapper )prevents cement from flowing back into csg
Casing shoes (reaming type
shoe)
Casing shoe (Directional type
nose)
Float collars
one way valve placed at one or two joints above the shoe prevents mud from entering
the csg while it is being lowered inside and cement from flowing back into csg
centerlizers
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adevice run around the casing which is designed to support and centralise the casing in deviated wellbores
هى عباره عن اداه تستخدم لجعل ماسوره الحفر فى مركز الحفره حيث تساعد drill string على عدم الانحراف يمين او يسار اثناء عمليه الحفر
adevice run around the casing which is designed to support and centralise the casing in deviated wellbores
هى عباره عن اداه تستخدم لجعل ماسوره الحفر فى مركز الحفره حيث تساعد drill string على عدم الانحراف يمين او يسار اثناء عمليه الحفر
Scratcher
adevice fastened to the outside of the casing which removes mud cake and the promote agood cement job
هى عباره عن اداه تستخدم لتنظيف البئر من خارج ال casing عن طريق ازاله mud cake اثناء عمليه ال cementing وذالك لعمل روابط جيده بين ال cement وwellbore well
selection of casing setting depths
Fracture gradient Definitionand importance
The forces affecting on the casing
external force
Which rusult from an external pressure which tend to collapse the casing
internal force
Which rusult from an internal pressure which tend to burst the casing
Longitudinal or axial loading
Axial loading my be tention due to dead load or compresion due to buoyancy
Classification of CSG.
to download book
http://www.up-00.com/?dp0b
The forces affecting on the casing
external force
Which rusult from an external pressure which tend to collapse the casing
internal force
Which rusult from an internal pressure which tend to burst the casing
Axial loading my be tention due to dead load or compresion due to buoyancy
Classification of CSG.
to download book
http://www.up-00.com/?dp0b