Well Control System on Drilling Rig.

Well Control System:

well control during

drilling the various systems put in

place to control well and prevent a

blowout incident from occurring

we will also review the main reasons

behind some of AD CO-Es well control

incidents which were handled

successfully

prior to the preparation of the drilling

program the asset development team

submits the final well prognosis to the

drilling team the well prognosis is

initiated by the petroleum engineer the

reservoir engineer then makes a planning

overview and provides the required

formation pressures and temperatures

then the following data is completed

geodetic data conceptual data geological

data reservoir data geophysical data

and petrol physical data once all the

data is entered the well prognosis will

be approved by the reservoir operations

asset team leader and will be published

in ad Co system let's begin by

explaining well control while drilling

it is essential to perform activities in

a safe way which will prevent

uncontrolled flow of formation fluids

and gases from the reservoir to the

well-bore and surface surroundings this

is called well control this includes

measures practices

procedures and equipment work over and

completion as well as the installation

repair maintenance and operation of

surface well control equipment it also

consists of well control barriers which

are divided into two groups primary and

secondary barriers the primary well

control barrier is the fluid column

hydro-static pressure referred to as

well-bore pressure that provides over

balance against the formation pressure

this column must be monitored and

maintained during drilling and tripping

to prevent formation fluids from

entering into the well-bore during

drilling if the fluid column is not

maintained with adequate mud density

making the formation pressure more than

the hydro-static pressure

formation fluids will find a way into

the well-bore and a kick will occur in

this case the well must be secured and

killed there are other cases when a kick

can occur let's review some of them

while tripping if there is a failure to

keep the hole full of mud to maintain

adequate hydro-static head then the

hydro-static pressure will be less than

the formation pressure inducing a kick

swabbing while pulling out of a hole too

fast can produce a suction effect

resulting in a decrease in the bottom

hole pressure large enough to allow

formation fluids to enter the well-bore

creating a kick

when drilling takes place too fast and

into depleted reservoirs without proper

reinforcement it can lead to cracking in

the walls and thus losing fluids into

the formation inducing a kick once a

kick is detected the secondary well

control barrier blowout prevent-or BOP

must be activated immediately by the

driller to secure and shut the well for

killing operations this is done by

closing the BOP using one of the BOP

control panels one situated on the rig

floor and the second situated in the 

me unit the driller will shut in the

blowout presenter to stop the flow of

formation fluids out of the well bore

then he will activate the alarm and

notify at code drilling supervisor and

rigged manager meanwhile at the rig site

the on-scene commander AD-CO drilling

supervisor will notify AbuDhabi telecom

operator and relevant assets control

room and raise emergency tier 1 which

activates appropriate emergency response

teams unnecessary crew will be evacuated

to the nearest assembly point the next

step will be to monitor the shut in

drill pipe and the shut in casing

pressure gauges

the kick will be circulated out of the

well-bore using the driller method first

cycle by pumping drilling fluid down

string and getting returns from the

analyst through the choke line to the

choke manifold and the poor boy de Gaza

and toxic gases will be flared once the

kick is out the well will be shut in

then the well will be killed with

weighted mud by circulating the kill

fluid until both the drill pipe and

casing pressures reach zero if all of

the well control barriers failed such as

human barriers BOP

equipment barriers

and system barriers and the BOP leaked

while circulating the kick out this

could lead to uncontrolled flow of

formation fluids and possibly a blowout

a blowout has massive catastrophic

consequences such as injuries and/or

fatalities of personnel release of toxic

gases pollution of the environment asset

damage and damage of AD CO-Es image and

reputation AD-CO strives to create a safe

and incident free working environment

for all this is why strong well control

integrity assurance systems have been

put in place these include policies

standards procedures people competency

and equipment

despite all of this ad Co has

experienced several well control

incidents which have been managed and

controlled successfully preventing a

blowout after sharing with you the

primary and secondary well control

barriers we will now share with you some

of the main causes behind AD CO-Es major

well control incidents no implementation

of top three concept plan

what if competent people in correct

formation pressure and drilling fluid

weight failure to implement management

of change procedure whenever there are

changes failure to maintain BOP

equipment

learning outcomes from such incidents

include ensure every drilling operation

begins with the discussion of the

top-three concept always use updated

reservoir pressure data for defining

drilling fluid weights make sure that

any change in the drilling plan is

governed by an approved management of

change process in case of well control

shut in the well immediately as per AD-CO

procedures and consults your supervisor

in conclusion well control incidents

must be avoided by all means as they can

lead to blowouts which have catastrophic

impacts at AD-CO we expect from all the

well drilling stakeholders to ensure

100% full implementation of AD-CO well

control integrity assurance systems it

is the responsibility of all managers

and supervisors both in the office and

at the rig site to verify and enforce

the full compliance of these systems to

avoid catastrophic incidents from

happening with your continuous

dedication compliance to AD-CO procedures

and your full commitment we prevent well

control incidents from happening in AD-CO.