Master the Art of Using Cementing Plugs

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Master the Art of Using Cementing Plugs
Cementing operations are one of the most
detailed works which requires complete attention
regarding well integrity. Since it is a
critical job, it requires a lot of research
large number of operations the years
and the
but yet it during
faces after helps
throughout
integrity cementing
and Plugs
problems,
jobs.
Cementing
solving such problems especially for the
petroleum industry globally and can occur at any
moment of the wells life cycle.
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Well integrity issues categorized according to
the moment at which happens

• While the cement displacement wellbore
• After the cement placement
• After the cement has been cured

in the
During the period between 1992 and 2006, the
leading cause for blowouts was cementing. The
first category results in very serious
well-control problems including blowouts.
These problems firstly
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occur because of the improper design of
the cementing operations hydrostatic pressure of
and due to the cement
slurries. The failure during the process of
mixing slurries obtains the desire density and
lost circulation during the cement
displacement. In the second category, the loss of
hydrostatic pressure of the cement slurries
causes problem during the initial hydration
period. The problems may rise because of the
mismanagement. It can cause pressure build up in
the annulus between the casing
zonal isolation, we-control the remedial solutio
ns for
strings and
problems and
this are normally expensive and difficult.
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In the third stage, the problems that occur are
more long-term normally caused by poor cementing
jobs. Defective drilling mud removal during the
cement slurry displacement in the annulus,
insufficient cement height that may lead to
casing leakage and corrosion problems are some
of the causes. Cementing Plugs can contribute to
long-term well integrity failures, otherwise,
the cost to fix these problems are highly
expensive.
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Puyang Zhongshi Group Co.Ltd.
Mazhuangqiao,Puyang City,Henan Province,China
Website http//www.zs-oilfieldequip.com Tel
0086-371-87096210 0086-371-87096211 Fax
0086-371-87096212