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Primary Cementing

Module CMT101June 2000

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Primary Cementing

Provide zonal isolation

Support axial load of casing strings and strings

to be run later

Provide casing support and protection

Support te boreole

The placement of a cementicious material into the annulus

between casing and open hole to :

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Types of Casings

Conductor

Surface

Intermediate

Production

Liner

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Conductor

Purpose

Prevents washing out under the rig

Provides elevation for ow nipple

Common sies and depths!

3"# $ 2"# %elded

2"# $ &'# Threaded 3"( $ 2""( )* &""( common+

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,

Conductor

-ther .emar/s!

Plugs not used

Careful pumping practices

Large e0cess re1uired

Thru$drill pipe cementing common

-P(s not unusually connected

Common Cements

ccelerated eat

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'

Thru$5rill Pipe Cementing

6ey Points!

Cement contamination

Channelling

5isplacement

Pump until cement to surface

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-utside Cementing

Purpose ring cement to surface

8acaroni tu9ing used

8a0: depth 2,"$3"" ft ;igh friction pressures

on$standard connections

Tubing moved

during job

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