3. Introduction
Objectives
Freezing
Evaluation
Hot tapping
Capping
We may face a lot of problems and
obstacles during oil production operations
such as valves malfunction and pipe rusting
and others may lead to several disasters,
so we need ways to deal with these
problems and reduce the pollution of the
environment that may happened and
continue production if possible
All of these needs led to Appearance of
some special methods to treat such
problems and to keep the well under control
also to provide safetyReferences
4. Introduction
Methodology
Research plane
Research
outcomes
Objectives
In this presentation we will talk about some
of the special methods used to reduce the
problems and techniques that is related to
this methods such as
• Capping
• Freezing
• Hot tapping
also we will talk about the associated
applications , equipments and examples in
the life process.
Introduction
Objectives
Freezing
Evaluation
Hot tapping
Capping
References
5. Introduction
Objectives
Freezing
Evaluation
Hot tapping
Capping
References
At the end of this presentation the
students will be able :
To know the treating techniques
of the previous methods.
To have an over view at the
required tools that had been used
in that methods .
To train to find suitable
solutions to solve the problems
7. Once the blow out happen and the fire is
out, the capping operation begins.Introduction
Objectives
Evaluation
Hot tapping
Capping
References
Freezing
Definition :-
a technique used to control blown-
out wells through shutting in and hold
pressure on it.
The well is capped on an available
flange or on bare pipe, utilizing a
capping stack
It incorporates a choke and a series of
valves which allow the progressive
closing of the well.
15. Introduction
Objectives
Evaluation
Hot tapping
Capping
References
In order to remove the valve
with pressure on the drillpipe,
one of the solutions is the drillpipe
would have to be frozen.
This method named
freezing
Freezing is a technique used to
form a temporary ice plug across
the bore of tubular or pressure
control vessels, while under
pressure.
Freezing allows faulty equipment
to be removed and replaced.
Freezing
17. Introduction
Objectives
Freezing
Evaluation
Hot tapping
Capping
References
what we do !?
A wooden box is constructed
around the area to be frozen.
Then, a very viscous mixture of
bentonite and waternspotted
across the area to be frozen.
Next, the freeze box is filled with
dry ice (solid carbon dioxide).
Note:-
Nitrogen should never be used to
freeze because it is too cold. The
steel becomes very brittle and
may shatter upon impact.
18. Introduction
Objectives
Freezing
Evaluation
Hot tapping
Capping
References
Several hours may be required to
obtain a good plug.
((The rule of thumb is one hour for
each inch in diameter to be frozen)).
Finally, the pressure is bled from
above the faulty valve; it is removed
and replaced and the plug is
permitted to thaw.
Almost everything imaginable has
been frozen, including valves and
blowout preventers.
22. Introduction
Objectives
Freezing
Evaluation
Hot tapping
Capping
References
Hot Tapping is a method of making a connection into an
existing pipe or vessel which is still under pressure or live.
Definition :-
What is it used for?
Additional branches allowing supply to and from other areas of
plant etc.
Monitoring points for temperature probes etc.
Entry points for isolation equipment (Stopples)
What Advantages are there?
Can be performed with out the need to shut down the plant.
No need for loss of production or supply to other areas