WELL CONTROL Test 05 English

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WELL

CONTROL

Examples

(English)

05

WELL

DATA

The

well

has

been

shut

in

after a

kick

The

wellwill

be

killed

using

the

wait

and weight

Method

at

30

spm

Answer

the

I'ollowing

nine

questions

from

the

data

above.

The

attached

kill

sheet

may

be

used

to

assist

you

with

youn

catculations

Hole

size

12-114.

Capacity:

36.61

l/m,

(0.0702

bbl/ft)

Hole

depth

(lyukm6lvs6q)

2012m

TVD,2391

m. MD

Casing

13-3/8

inch,

Shoe:

1463

m

TVD.

1579

MD

Drill

Pipe

5 ,

19,5lb/ft.

Capacitv

=

9.23 l/m

Heavy

Weight

Pipe

(HW)

Drill

Collar

(DC)

8

x

3 inch,

CapacitV=

4.50llm,

Lenqth:162m

Pump

(szivattv()

18.9

liter/stroke

Kill Pump

Rate

30 bar

at 30

SPM

Volume

Open

Hole

to,

Collars

(oH-DC)

43.6llm

Volume

Open

Hole

to

Drill Pipe

/

HWDP

(OH-DP/HW)

63,4llm

Volume

Casing

to Drill

Pipe

(CSG-

DP)

70.6

l/m

Mud

Weiqht

LA

kstl

Leak-off

test

at 13-3/8'

casing

shoe

(with

1.27

koll

densitv)

69

bar

Pit

Gain

1900

lires

Shut

in Drill

Pipe

Pressure

(srDPP)

23bar

Shut

in

Casinq

Pressure

(SICP)

28bar



WI=LL

CONTROL

Examptes (Engtish)

05

FIEEi

OFg

*:te

I

BATE:

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i

fwrlrnprgfnBrollfqtr/]j

S.NFACG

1.EAT(.{F

Pffi

Uffi

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FtNHATf,ilI

STEI,EIT'I

TE$I.

ffi UJSG

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TF]trrY'

tr TEAT

i,HI(

{l|-lOil6ATE

IHUIsi

FilIITI

IEISIIT

r

tErn

s}

rs''

BtfE

r-v-

nenr]rtrr6iET''

finilLnilru5Pr

tql.

ClffiIf

EElrEtryl

r

git#E

f,

r,[

EEFrH

r

gjpft

#ttfl 4rEE[.[Elttrr...

gfiEErrr4iI-I..IEft.{{4.

DAagTf

bgrl

Gr,tdqs{s 6rm..

5EE

T,LTEPTH

T.II{IIEPTI{

l-lm

H@ 41n"

5E

if-tlFTt"l

T.TIDEFTTI

l-lm

R.E,IF.ISI

IITEf,.-

F.fiF 'IfTAHEH-

lt|l6&$

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FLl

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lfit_LEtE

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GAFAH]|.T

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{rn

tfiIu.BtE

nli

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rtt

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fiffr[fra

ffiITFE

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tE

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ll,rll I

&



WELL

CONTROL

Examples

(English)

05

Ft€El0f

krtsgru'fiqnnl

rShS

Gqnlrd

Faluur

Euiltffi

3OP

ffl

€firrrt

.

lftr,Scal

Hltrfl

{

i(IG|I,DAB:

gtFp

l__J

br

PnGAfl

l-].*

c{.FEnr

tnrurs

rrrn

r}rgry

*

lillPP

|vDr.OttrBt

BllSrllE

PFBSIfiE.

lBFg

+

gOF

+

____.

I

;;;;-*'*

|

crm'n'n.r*A;Dffi

r DtililrcPresLnF

1,o#

FCF

l--

r ____-

r

f4-lCP'mP

Eil

0tlr

rro

.:

r

lgntlll0tbblr

tEl



WELL

CONTROL

Examptes

Engtish)

0b

1

What

is

the

kill

mud

weight?

kg/

2

How

many

strokes

are

required

to

pump

kill

mud

from

surface

to

bit?

strokes

3

How

many

strokers

are

required

to

pump

from

the

bit

to

casing

shoe?

strokes

4

What

is

the total

arnnular

volume?

litre

1.

What

is

the

MAASP

at

the

time

the

well

is

shut in?

bar

2.

What

is

the

Initial

Ciirculating

pressure?

bar

3.

what

is

the Final cinculating pressure when

kill

mud

is at

the

bit?

bar

4.

what

is

the

MMSP

at

the

time

the well

is

killed

with

heavy

mud?

bar

bar/100

strokes

10

The

following

statelment

describes

one

of the

differences

in

behaviour

between

drilling

with

Oil-bar;ed

and

Water-based

mud.

While

circulating

out

a kiclk,

gas

expansion

occurs

in

the

annulus

at

the

same

rate

in

oil

and

water-based

mud.

tr

False.

E True.

5.

What

is

the drill

pipe

pressure

reduction

per

100

strokes

as

kill

mud

is

being

pumped

to

the bit?



WEILL

CONTROL

Examples

English)

05

11

Which

of the following

drilling

practices

should be considered when

connection

gas

is

noticed?

TWO

ANSWERS)

tr

Control

drilling

rate

so that

only one

slug of connection

gas

is in

the

hole at

z

afry

one time.

Minimise

the

tinre during

a

connection when

the

pumps

are switched

off.

Raise

the

mud

yield point.

Pump

a low viscosity

pill

around

bit

to assist in reduction

of balled bit or

stabilisers.

Pull

out

the

hole

to

change

the

bit.

tr

tr

tr

12

How

should the

choke manifold

be set up for

the HARD SHUT lN

procedure

while

drilling?

tr

BOP

side outlet

Hydraulic

Valve

Closed.

Auto

Choke

Opren.

Valve

Upstrearn

Mud-Gas

Separator

Open.

tr

BOP

side

outlet Hydraulic

Valve

Open.

Auto

Choke

Opren.

Valve

Upstrearn

Mud-Gas

Separator

Closed.

BOP

side outlet Hydraulic

Valve

Closed.

Auto

Choke

Closed.

Valve

upstreanr

Mud-Gas

Separator

Open.

BOP

side

outlet Hydraulic

Valve

Open.

Auto

Choke

Closed.

Valve

Upstrearn

[t/Iud-Gas

Separator

Closed.

tr

13

Shut in Drill

Pipe

Pressure

is required

to calculate which

of the following

pre-ssures?

VFormation

pressure.

tr

Shoe

pressure.

tr

Hydrostatic

pressure.

E

Fracture

pressure.

14

It

is

known

that

the

solubility

of

gas

in

oil based or

water

based

mud can lead

to

a

difference

in shut

irr well

data

following

a kick under

identical

conditions.

Which

of

the following

statements

is correct

if

this ditference

in well

data occurs

when using OIL

BI\SED

DRILLING MUD?

ryvo

ANSWERS)

EI

The

shut in

casing

pressure

will

be lower.

tr

The

shut in

casing

pressure

will be higher.

in

casing

pressure

compared

with water

tr There

will be no difference

in

pit gain

compared with

water based drilling

mud.



WE:LL

CONTROL

Hxamptes

(English)

05

15

What

is

tne

pntn4,

tr

The slow circulating rate pressure

used

in

the

kiil

process.

tr

The

use

of

BOlps

to shut

in

a

wellthat

is

flowint.

*Il ^:::

glpit

capacity

and

flow

rate

measuring

devices

to

recognise

a

kick.

E4

Ine

use

of

mud

hydrostatic

to

balance

fluid

pressure

in

the

formition.

16

A

vertical

well

has

been

drilled

to

a

depth

of 2,500

metres.

Overbalance:

Mud

gradient:

Casing

capacity:

11bar

r-----

J

--

ll'e:

-kflir^s

0,1666

barlm

\

64,

3,r^ i

Fr,n * n ..

,,

\

\)

w/,

J/qr' h .n

r:::

-----r

V

o/.,8

4t*

t/

)8

4/i

2llm

Drill

pipe

metal

displacement:

4.pVm

/x.--

/,G=

r,o3lr' y

-_)/=

4,6

-q.oto?T4

How

many

complete

stands

can

be

puiled

dry

before

the

weil

flows?

(Assume

one

stand

equals

27

m\.

@r-G-.t no,

D

46

stands

-@--

47

stands

\

---=-

fr\G

f

Oa.r.t

q4

t_n.

's

p

6

WELL

DATA

I

Pipe

Capacity

Drill

Pipe

Metal

Disprlacement

Average

Stand

Length

9.3l/m

4:3llm

28.3

m

calculate

the

mud

nlquired

to fill

the

hole

per

stand

when

pulled

'dry'?

18

A

well

is

being

killerd.

I

gng:::yf l:

f,.pt

ant.at.31

bar

and

the

pump

speed

at

30

SpM.

Halfway.through

this.rrrst

crrculation,

the

operator

on

the

choke

observes

a

sudden

increase

in

drill

pipe

pressure.

There

is

no

signifi. nt.n nge

in

choke

pressure

and

the

pump

speed

is

still

30

SpM.

What

could

have

hiappened?

(TWO

ANSWERS)

tr

Pressure

has

bruilt

up

in

the

mud/gas

separator.



WELL

CONTROL

Examples

(English)

05

19

which

of

the following

actions

taken

whilst stripping

driil

pipe

into

the hole

will

help

maintain

ern

acceptable

bottom

hole

pressure?

(Assume that

therer

is

no influx

migration),

d

aeea

offthe

drill

pipe

closed

encl

displacement

at regular

internvals.

tr

Pump

a volume

of mud

into

the well,

equal

to the

drill

pipe

steel

displacement,

at regular

intervals.

tr

Pump

a

volume

of mud

into

the well,

equal

to the

drill

pipe

closed

end

displacement

at regular

intervals.

tr

Bleed

otf

the

drill

pipe

steel

displacement

at regular

intervals.

20

Which

of

the following

conditions

increase

the risk

of creating

surge

pressure

when

running

a drill string

into

a well?

(TWO

ANSWERS)

E-

Large

annular

clearance.

Efl

Small

annular

c;learance.

E-Low

viscosity

and

gel

srength

of the drilling

mud.

El-

High

viscosity

and

get

strength

of

the drilling

mud.

tr

Large

sized

no:zzles

in the

drill

bit,

tr

Running-in

Sp€€d

greatly

reduced.

21

The following

statement

describes

one of the

differences

in behaviour

between

drilling

with

Oil-based

and

Water-based

mud.

Gas

is more

soluble

in

water

based

mud than

oil based

mud.

{ra .

tr True.

22.What

are

the main

conrditions

to

determine

the kill

pump

rate?

(FO,R

ANSWER)

Et,

Barite

mixing

ciapacity

M

The

capacity

ol'mud-gas

separator

tr

The

casing

burst

prsesups,

ErThe

mud volume

in

the trip

tank,

V-The

choke

capiacity,

Ef

The

annulus

pressure

loss.



WI=LL

CONTROL

llxamptes

(Engtish)

05

23

Calculate

tne

reduc

the

following

well:

Verticaldepth,

Surface

to

200

m,

200 -

400

m,

400

m

to

bottom,

Original

mud

density,

1,900

m

tr

Tbar

E,2bar

Msbar

A.well is being

kilhed.using

the

Drillers

method.

At

a

given

moment

the

Standpipe

pressufe

is

60

bari

at

30

SpM.

The

pressure

insicle

the

Mud/Gas

Separator

is

increasing

and

it

is

decided

to

reduce

the

pump

rate.

what

is

the

effect

on

bottom

hole

pressure

if

60

bar

is

maintained

on

the

Standpipe

while

the

pump

rate

is ieduced?

=

Bottom

hole

pressure

will

remain

unchanged.

I

Bottom

hole

pressure

will

decrease.

M

Bottom

hole pressure

will

increase.

Which

of

the

follornrin

formation

strenght

at

hoe?

proximailey

100

ft.

below

the

well

head.

26

A

kill

operation

is

rea

The kill mud is

reacly

rokes

to displace

surface

lines.

What

action

has

to

be

taken?

tr

lgnore

the

130

strokes.

lt

will

not

affegt

the

drill

pipe

pressure

graph,

and

if

J filing,

it

will

ty

factor.

EI

Re-Zero

stroke

Et

suostraciitre'i

:t?T[ir:1"s

and

r+draww

drirl

pipe

pressure

graph.



WEIIL

CONTROL

Examples

(English)

05

while

circulating

out a

kick,

the

mud

pump

fails.

what

is

the

FIRST

action

to

take?

E

-Divert

the well.

E(

Sfrut

the

well

in.

tr

Change

the

purnp

as

soon

as

possible.

28

while

drilling

along

at a

steady

rate

the

Derrickman

asks

if

the

pumps

can

be

slowed

down

so

that

the

shakers

can

handle

the

increase

in

cuttings

coming

back

in

the

mud

returns.

What

would

be

the

safest

course

of action?

tr

Chek

for

flow

-

if none

then

continue

at the

same

rate

allowing

the

excess

to

bypass the shakers

and

get caught

in

the sand traps that

caribe

dumped

later,

tr.check

for

flow

-

if

none

then

return

to

the original

drilling

parameters.

M

Check

for flow

- if none,

then

circulate

bottoms

up

at a rebuced

rate

so

that

shakers

can

handle

cuttings

volume,

frow-check

periodically

during

circulation.

tr

slow

down

the

mud

pump

untilthe

shakers

can

handle

the

capacity

of

cuttings

in

the

returns,

as

requested

by

the

Derrickman.

29

which

of

the

followiing

situations

ls

Nor

a warning

sign

that the

well may

be kicking

while

drillling?

El,Pit

gains.

Ef

Decrease

in

pump

strokes.

tr

Decrease

in

purnp

pressure.

tr

Flow

rate

increase.

A

Driller

is

preparing

to

pull

out

of

the

hole

and

has lined

up to

the slug

pit.

He intends

to

pump

a 3000

litres

heavy

slug,

followed

by 1500

liter

ot-Oiitting

muO

from

the

active

pit.

Calculate

how

far

below

the

surface

the

level

will

drop

insie

the

drill string

after

the

slug

has

been

erllowed

to fall

and the

weil

has

equalised.

WELL

DATA

Depth of hole (RKB)

Drilling

mud

weight

Heavy

slug weight

Drill

pipe

capacity

Surface

line

volumel

2800

m

1.46

kg/l

1.74

kgll

9,.1 l/m

1000

|

4

-/

)-

6Z,A

56m

63m

335

m

80m

c)

D)



WIELL

CONTROL

Examples

(Engtish)

05

31

lf

mud

flows

from

a

the

pump

is

starteld,

what

is

the

problem?

_E

The

pump

needs

to

be

repaired.

5f,ylp

pressurc

is

greaterthan

mud

hydrostatic

pressure

Elr

-rne

annurus pressure

losses

are

creating

an

overbalance

against

the

formation.

tr

Mud

hydrostatic

pressure

is

greater

than

formation

pressure.

32

Does

a kick

alway's

occu

ight

reduction

noted

on

the

weight

and

the formation

pressure.

ial

kick

zone.

33

In

order

to

maintai

the

mud

weight.

How

will

this

affect

the

MAASp?

tr

MASSP

will

stiay

the

same.

trr'

MASSP

will

inr:rease.

Ef

MASSP

will

dercrease.

34

Under

which

of

thel following

conditions

should

a Driller

consider taking

a

slowcirculation rate

prerssure?

(TWO

ANSWERS)

e.

35

Indicate

whether

the.following

statement

relates

to

the Driller,s

Method

or

the

Wait

and

Weight

lVtethod.

It

removes

the

infrurx

from the

hore

before

pumping

kiil

mud.

{

Drill r' Methocl,

tr

Wait

and

Weight

Method.



WELL

CONTROL

Examples

(English)

05

36

What

is

the

safest

action

a

E-lncrease pump

speed.

M

Flow

check.

tr

Circulate

bottoms

up.

tr

Reduce

weight

on

bit.

Driller

can take

after recognising

a drilling

break.

Which

of the

follornring

increase

the

risk

of

swabbing?

(THREE

ANSWEFIS)

Ef-Viscous

mud.

d

gatteO

up

Stabilisers.

tr

Low

permeabiliity

formation.

tr

_Spiral

drill

collarrs

in

the

BHA.

ff

Tripping

out

too fast.

^

(TWO

ANSWERS)

ff

Pump

out

of

thr: hole

on

trips.--

9 Flaf

a+

mvA

nqLi

E,.Use

a heavy

wreight

mud

to

crate

maximum

overbalance.

'

Ef

Drill

a

pilot

holer

at

a slow

controlled

rate.

tr

Maintain

high

rate

of

penetration

to ensure

mud

viscosity

level

is as

high

as

possible.

tr

Use

an

oil

based

mud.

which

one

of

the following

well

contror

probrems

requires

the

pump

to

be

shut

down

quickly

to

prevent

over-pressuring

open

hole

formaiion6?

tr

A

pump

liner

wiashout.

tr

A

washout

in

thre

choke

manifold,

tr

A

washout

in

the drill

pipe.

tr-A

plugged

bit

nozzle.

Ei

A

plugged

cholle.

tr

A

lost bit

nozzle,

37

39

40

ls

it

true

that shallow

gas

kicks

are

easier

to

handle

than

those

taken

after

deep

drilling?

{*o.

tr

Yes.



WELL

CONTROL

Examptes

(Engtish)

05

@

(TWO

ANSWERS)

tr_olprbory

Methyt

Celtutose

(CMC).

Ef

Methanot.

tr;

Diesel

oil.

#Gtycot.

tr

Water.

42

W i9

gril. r9: whir:h

of

the

following

situations

make

kick

detection

with

a

P.v.T.

(pit

Vorurne

Totalizer)

moie

difficutt

toitne

Jritterz

kers.

43

which

of

the

foilowing

may

be

an.

earry

warning

of

abnormar

pressure

at

constant

notary

RF'M,

constant

woB

ino

consiani pump

ratez

ns.

hakers.

A kick

has

been

tal<en

and

it

is

known

that

a

potential

lost

circulation

zone

exists

in

the

open

hole.

select

the

correct

actions

that

can

be

taken

to

minimise

pressure

in

the

annulus

during

the

kill

operation.

choke

for

safety.



WELL

CONTROL

Examples

English)

0S

45

lf

a shallow

gas

flow

is

detected,

which

of the following

steps

should

be

taken

as

the flow is diverted?

./

Ef

Increase

pump

rate.

tr

Decrease

pump

rate.

tr

Maintain pump

rate,

46

why

is

pressure

build

up

in

the

Mud

Gas

separator

poor

Boy

Degasser)

dangerous

while

circulating

out

a kick?

tr

Pressure

build

up

will

increase

the risk

of lost

circulation.

tr

Pressure

build

up will

affect

ability

to

make

choke

adjustments.

trrPressure

build up may allow gas

to

be

brow up

the dbrrick vent line.

Ef

Pressure

build

up may

allow

gas

to enter

the

shale

shaker

area.



1.

WELL

CONTROL

Examptes

(Engtish)

05

EQUIPMENT

Using

the

BoP

configuration illustrated

in

Figure below

answer

the

following

six

questions

by

ticking

the

yES

or

NO

box.

1 ,

With

the

wellahut

in

Gder

pressnre

on

s

the side outlets

of

the drilling

ipool?

ONo

{r

With

no

drillpipe

in

t

change

the

3-112',

rams

to

S

rams?

d

y .

ONo

With

the

well

shut

i

safety valve

in

the

ms

to

variable

bore

rams?

ONo

C ,

4

With

the

well

shut'n

blind

rams

to

5

pipre

rams?

'

d

.

ONo



WELL

CONTROL

Examples

(Engtish)

05

with

the well

shut

in on

5

pipe

rams

under

pressure,

can

the

annular

element

be

replaced?

Q/Y t

ONo

with

the well

shut

in

on 5

pipe

rams

under

pressure,

can

the

manual valve

on

the

choke

line

be

rreplaced?

O

Yes

e/rtro

Figure

420-0008

illustrates

a Bop

Hydraulic

control

Unit.

some

components

have

been

numbered

Match the correct numbers to the component descriptions below

O

4O

Annular

preventer

reducing

and regulating

valve

O

4

Accumulator

pressure

gauge

O

,6

Automatic

hydro-pneumatic pressure

switch

O

4

4-wary

valves

O

4?

Annular

Preventer

UniURemote,,switch

o

t{

By-pass

valve



WELL

CONTROL

Examples

(Engtish)

05

what

is

the

usabre

fluid

vorume

of an accumurator botfle, according to

Apl

requirements?

./

@f

fte

volume

of

fluid

recoverable

from

an

accumulator

bottte,

between

the

accumurator

.perating

pressure

and

200

psi

iuo*1ne-nottre

pre_charge

pressure.

o

The

volume

otf

fruid

recoverabre

from

an

accumurator

botile,

between

the

accumulator

operating

pressure

minus

zoo

psiano-

pr --.i., rg

pressure.

o

The

total

vorurne

to

be

stored

in

the

accumurator

botfle.

I

During

a

routine

tr

one

of

the blowout preventer bonnets

is

leaking flui

What

action

should

be

taken?

o

Ram

packing

erements

on

the

ram

body

are

worn

out,

reprace

immediatery.

O

A

leak

here

is

normal

because

the

metalto

metal

sealing

face

in

the

bonnet

needs

some

lurbrication

to

minimise

damage.

---

--- v

o

The

weep

horer

only

checks

the

crosing

chamber

seals,

reave

it

tillthe

next

maintenance

schedule.

O

Energise

emergency.packing

with

plastic.

lf

leak

stops,

leave

it

till

the

next

maintenance schedule

I Primary

ram

shaft

sear

is

leaking,

secure

the

weil

and

reprace

immediatery.



WELL

CONTROL

Examples

(English)

05

10

which

of

the

folloraring

dimensiones

is

the

primary

factor

in

limiting

the

maximum

working

pressure

of

the mud/gas

separator

in Figure

n+l-ooolz

MUD/GAS

INLET

MAIN

BODY

SHAKER

TANK

i

O

),

-

the

height

of

the

main

body.

G/

H2

-

the

height

of

the

dip

tube.

O

H3

-

the

total

hr:ight

of

the

vent

line.

O D4 -

diameter

of

the

inlet

pipe.

DERRICK

VENT

LIINE



WELL

CONTROL

Examples

(English)

05

11

Figure

Al

l-0001

illustrates

a U-Type

Ram

BoP.

Some

components have

beennumbered.

Figure

A11-0001

Match

the

correct

numbers

to

the

component

descriptions

below.

O

^L_

Ram

change piston

O

8-

Ram

change

cytinder

O

S

Bonnetseal

O g_

Lockiing

Screw

housing

O

b_Bonnet

bott

O

40

Interrnediate

flange

A

BoP

hydraulic

control

unit

accumulator

bank

has

g

cylinders:

-

Cylinder

capacity ('Nitrogen

Fluid)

-

37.g

liter.

Accumulator

pre-charge

pressure

-

69

bar.

Accumulator

opererting

pressure

-

2A7

bar

Minimum accumulator operating pressure

-

g27

bar?

calculate

the

total

usable

fluid

volume

for

the

accumulator

bank?

A)

167

liter

B)

252liter

C)

102

liter

D)

151

liter



WELL

CONTROL

Examples

(English)

05

13

what

is

the

main

function

of the

choke

in

the

overall

Bop

system?

I To

hold

back

pressure

while

circulating

out a

kick.

O

To

shut

the

welll

in

softly.

O To

direct

wellbore

fluids

to the

mud/gas

separator.

O To

direct

hydrocarbons

to

the

flare.

14

lflhe

air

pressure

gauge

on

the remote

Bop

control

panel

reads

zero,

which

of

the

following

steltements

is

true?

O

All

stack

functions

can

be

operated

from

the

remote

panel.

O

choke

and

kill

line

valves

can

stiil be

operated

from

the

remote

panel.

orThe

annular

preventer

can

still

be

operated

from

the

remote

panel.

d tto

stack

function

can

be

operated

from

the remote

panel.

On

a Driller s

air

oprerated

panel

on a

surface

installed

BOP

a ram

close

function

was

activated

and

lthe

following

observations

were

made:

_

Green

light

went

out.

Red light came

on.

Annular

pressure

did not

change.

Manifold

pressure

decreased

and

after

a

while

returned

to

its

original

position.

Accumulator pressure

decreased

to

2500

psi

and remained

steaiy,

What

is

the

cause

of

thre

problem?

The.

selector

(opererting)

valve

(3

position/4

way

valve)

is

stuck in

the

open

position.

Th.ere

is

a blockage

in

the

hydraulic

line

connecting

the BOP

to

the BOp

control

unit.

There

is

a leak

in

the

hydraulic

line

connecting

the

BOP

to

the BOp control

unit.

Electric

position

switches

are

malfunctioning.

The

pressure

switch

or

the

pumps

on

the

BOP

control

unit

are

malfunctioning.

t

b

o

o

o

o

o



WI=LL

CONTROL

l-xamptes

(Engtish)

05

16

what

is

the

purpos"

9r^t q

"by-pass"

button

on

the Drillers

remote

control

panel

on a surface

BOp

intallation?

o To

increase

the

annular

pressure

to

the

existing

accumulator

pressure.

dto

increase

tl"re

manifold

pressure

to

the

existing

accumulator

pressure.

O To

increase

tl"re

manifold

pressure

to 2,000 psi.

O

To

inorease

the

accumulator

prelssure

to

3,000

psi.

which

of

the

follouving

statements

about

ring

gaskets

are

correct?

(TWO

ANSWERS)

O

Ring

gaskets

may

be

used

severaltimes.

drtyo"RX

and

l3X

ring

gaskets

provide

a

pressure-energised

sear.

I

Only

BX

ring gaskets

can

be

used

with

BX

type

flanges.

o

The

same

material

speciflcations

apply

to

ring

gaskets

as

to

ring

grooves

17

18

What

is

the

purpose

of

the

master

control

valve

on

an

air

operated

remote

Bop

control

panel?

O

Adjusts pipe ram closing

pressure.

o

Activates

the

erectric

circuit

for

the

open/crose

rights.

O

Activates

the

air

circuit

at

the

panel.

@

Activates

the

hydraulic

fluid

circuit

at the

panel,

.--)

(

19

when

annular

Bops

are.

hydraulically

pressure

tested,

if

often

happens

that

the

test

pressure

cannot

be

kept

steady

ituring

the

first

attbmpt.lrrey

have

to

be

charged

up

two

or

more

times

before

an

aiceptable

test

is

obtained.

Why

is

this?

@

Annular

BoPs

always

leak

until

the

packing

element

finds

its

new

shape.

This

motion

can

take

several

minutes.

The

packing

urrit

elastomer

is flowing

into

a

new

shape

because

the

rate

of

flow

is

influenced

by

the

applied

preisure.

The

compressibility

of

the

hydraulic

fluid

from

the

hydraulic

control

unit

below

the

closing

piston

causes

the

test

pressure

to

drop.

o

o



WELL

CONTROL

Examples

Engtish)

05

20

When

closing

the

upper

rams

from

the remote

control

panel

on

the rig

floor

the

green

light

indicator

goes

out

but

the

red

light

indicator

does

not

Jome

on.

The Accumulator pressure

and

the

Manifold pressure readings decrease and

then

return

to nornral.

/

What

could

be

the

reason

for

this?

\

i

O

The

4-way

valves

on the

BOP

hydraulic

control

unit

did not

move.

-

O There

is

a leakage

on the

hydraulic

circuit.

O

There

is

an

electricalfault

with

the

lights.

O

The rams

did

not

close.

21

Wltglit

the

primary

function

of a weep

hole

drain

or vent

hole)

on a

ram

type

BOP?

orTo

show

that

the

closing

chamber

operating

pressure

is

too high.

I To

show

that

the

mud

seal

on the

piston

rod is

leaking

O To

show

that

the bonnet

seals

are

leaking

O To

show

that

the

ram

body

rubbers

are leaking

22

A

conventional

flaprper

type

float

valve

is installed

in

the

bit

sub in

the

closed

position.

What

effect

does

the float

valve

have

on the

drill

string when

tripping

into

the

well?

TWO

ANSWERS)

line.

c collapse

of

the drill

pipe

-

if not

filled.

O

lt

reduces

surge

pressure

on the

formation.

O

lt

allows

reverse

circulation

at any

time.

O lt increases

flow-back

through

the drill

string.

23

What

equipment

should

be

made

up

onto the

string

in

order

to

perform

the

stripping

operation

safely,

assuming

there is

no

floit

sub

or dart

sub in

the

string?

,-\

O

The

inside

BOP

with

a

drill

pipe

safety

valve

closed)

Installed

on

top.

{

o

The

drill

pipe

safety

valve

open)

with an

inside

BoP

installed

on top.

.

O

Only

the

drill

pipe

safety

valve

in the

open

position.

O Only

the

inside

BOp.

O

Only

the drill

pipe

safety

valve

in

the closed

position.



WI=LL

CONTROL

Examptes

Engtish)

05

Which gas

is

used

to

Control

Unit?

O

Air.

O

Carbon

Dioxide

O,

Oxygen.

U Nitrogen.

O

Methane.

25

What

is

the

closing

time

for

a ram

ty

O Less

than

45

s;econds.

O,Less

than

2

minutes,

S

Less

than

30

s;econds.

Figure

413-0002

illlustrates

the

profile

of an

API

6BX

type

flange.

Some

critical

dimensionr;

are

numbere

1,

2,

3 and

4.

APlType

6BX Flange

Which number indicates the

Nominalflange

dimension?

O Dimension

No.,4

O Dimension

No.l3

O Dimension

No.i2

@

Dimension

No.1



WELL

CONTROL

Examples

(English)

0S

27

Why

should

the

side

outlet

valves

below

the

plug

be

kept

in the

open

position

while testing

a

surlace BOp

stack with

a

test

plug?

...1

(TWO

ANSWERS)

i

O

Otherwise

reverrse

circulation

will

be needed

to

release

the

plug.

O

To

observe

for

well

flow

from

the

annulus.

IJ

O

To

prevent

potrential

damage

to the

casing

or

formation.

O Because

the

terst

will

create

extreme

hook load.

28

What

is

the most

common

action (and

considered

as

good practice)

that

should

be

taken after connecting the open and close hydraulic

lines

to

a surface

installed

tsOP

staclk?

O

Drain

the

accumulator

cylinders

irnd

check

the

nitrogen

pre-charge

pressure.

O

Perform

accurrulator

unit

pump

capacity

test.

O Function

test

alll

items

on

the

stack.

O Place

allfunctions

in

neutral

position

and

start

pressure

testing

the

Bop

stack.

29

What

is

a7-1116 ,10,000 psiflange?

O

lt

is

designed

f<lr

RX

ring

gasket

type.

o

lt has

a

10,000

psitest

pressure

and

5000

psiworking

pressure.

O

lt has

a

10,000

psiworking

pressure

and

7-1116

lD.

O

lt has

a7-1116

OD

and

a

10,000

psi

working

pressure.

30

On

the

remote

BOP

control

panel

on the

rig floor,

the

master

control

valve

handle/button

musll

be held

depressed

for five

seconds

then released

before

operating a

BOP

function,

O False,

O True.



WELL

CONTROL

Examples

English)

05

31

Figure

illustrates

ian

inside

blowout preventer.

The

lower

kelly

cock,.upper

keily

cock,

driil

pipe

safety

varve

and

inside

Bop

are

some

tools

userd

to

prevent

flow

inside

thi

oritt

string.

-

To

what pressure

s;hould

these components

be

tested?

o

Two

times

the

rated

working pressure

of

the

toor

used up

to

s,000

psi).

o Test

to

a

pressure

at least

equal

to

the

maximum

anticipated

surface

pressure,

but

lirnited

to

the

maximum

rated

working

f;;.rre

of

the

Bop

stack

in

use.

O

Always

use

a

pressure

equalto

10,000

psi.

o

one

and

a

harf

times

the

rated

working pressure

of

the

toor

used.



WELL

CONTROL

Examples

(English)

05

33

What

is

the

purposie

of

a

Vaccum

Degasser?

O

lt is

mainly

us€,d

to

remove gas

from

mud

while

drilling.

O

lt

is

only

used

rrvhile

circulating

out

a kick.

O

lt is

mainly

used

to

separate gas

from

liquids

while

testing.

o

lt is

a

standby

in

the

event

of

the Mud/Gas

separator

(poor

Boy)

failing.

34

What

are

the

main

components

of

a

diverter

system?

(TWO

ANSWERS)

O

A

vent line

of sufficient diameter

to

permit safe venting using the mud-gas

separator.

o

A

high

pressure

ram

type

preventer

with

a large

internal

diameter.

O A

vent

line

of

snrall

diameter,

sufficient

to

create

a

back

pressure

on

bottom

while

circulatinlg,

O

A

vent line

of

sufficient

diameter

to

permit

safe

venting

and

proper

disposal

of

flow

from

the

well.

o A

low

pressure

annular

preventer

with

a targe

internat

diameter.

35

There

is

only

one

inside

BOP

with an NC50

(4-112

inch lF) pin connection

on

the

rig.

The

drill

string

conriists

of:

S-inch

Heavy

Weight

driil

pipe

(NCSO)

8-inch

(6-5/8

Reg.)

driil

coilars.

Which

of the

following

crossovers

must

be

on

the

rig

floor

while

tripping?

O 6-5/8

inch

Reg.

Box

x 7-blg

inch

Reg.

pin

O NC50

(4-1lZ

inr:h

tF)

Box

x

7-518

inch

Reg.

pin.

O NC50

(4-112

inch

tF)

box

x 6-5/8

inch

Reg.

pin.

O

NC50

(4-112

inch

lF)

Box

x 6-b/8

inch

Reg.

box.



WELL

CONTROL

lixamples

(English)

05

36

After

observing

a

kick

the

wett

rt

cto

preventer.

After stabilistation

of

shut in pressules

the

casing

gauge

reads

1,000

psi

(69

bar)

104.5

r-eal

'

C

losing

pressures

are

average

and

will

vary stighily

wrtn

6ach

past(in9

unit.

U9e

closing

pressure

shown

at initialclosure

to

€stabllsh

sealofi,

and

reduce

ctosing

pressure

proportionally

as

well

preBsure

is

incr€ased.

Well pressure will maintain closure

after

exceeding the.

required lever,

'Close

CEutiorrsly

To

prevent

Collapse

Of Casino,

\\\\.

>\ \\.

\-

? X'z).'

r_N?rt:

,

..rre-

orrNi

.N}N'M

:39.\

I

]:r\-

l\

\---\,j

-

\. r-

\-,-

f

NfTtAL

69'

138

2O7

276

34s

CLOSURE

WELL

PRESSURE

-

Bar

L

tg

cl

U6e

f

v,

u,

lrJ

t

o-

(9

z

v,

o

d

sa.s

To

which

hydra-ulit;

pressure

should

the

annular

closing

pressure

be adjusted

to

meet

the

manufacturer's

recommendations?

O

21-28bar

O 35

bar

or

above

O

28-35

bar

O

14-21bar

37

Most

of

the conventional

front

pacfe

between

steel

platres,

what

are

the

main

reasons

for

this

type

of

design.

(TWO

ANSWERS)

o

To

prevent

any'swelling

when

used

during

high

temperature

operations.

o

To

feed

new

rubber

into

selaing

contact

with

the

pipe

when

the

sealing

facebecomes

vvorn.

o

To

prevent

the rubber

extruding

top and

bottom

when

the

rams

are

crosed.

O

To

support

the

weight

of

the

drillstring

during

hang_off.



WELL

CONTROL

Examples

(English)

05

A

leak-off

test is

to

be

performed

using

the high-pressure

cement

pump.

Standpipe

Gauge

Mud/Gas

Separator

I

c.'

/.23

Mud

Flare

Tanks

Vent

Llne

\22

Pressure

Gauge

,i

19

'T

I

-L

Manual

Choke

)(

ta

-T-

I

J,

I.13

t-*J

16

11

14

Choke

Manifold

Blind/Shear

select

the correct

sequence

for

valve

Nos. 1

,2,3

and

4 Figure

when

pumping

down

the

drillstring

and

reading

the

pressure

from

the standpipe

mlnifold

gauge?'

Note:

The

bottom

pipe

rams

are

closed.

O

1=Closed,

2=Open, 3=Closed, 4=Open.

O 1=Open,

2=Open,

3=Open,

4=Closed.

O 1=Open,

2=Clo'sed,

3=Open,

4=Closed.

O 1=Closed,

2=Open,

3=Open,

4=Closed.

('

.,

'\

Y./



WI=LL

CONTROL

Examptes

(Engtish)

05

SUPERVISORY

1.

A

kick

was

detecte<l

while

drilling

ahead

and

the

well

shut

in.

The

long

open

hole

section

andihe

low

leak

off

test

value

indicate potential

lost

circulation

during

thre

well

control

operation.

Which

of

the

following

methods

should

be

used

to minimize the

well

bore pressure

below

the casing

sl roe?

A.

Wait

and

Weight

method.

B.

Bullheading.

C.

Driller's

method.

D.

Volumetric

rnethod.

2.

Which

of

the

following

statements

are

true?

(TWO

ANSWERS)

A)

The surface

line

volume will

affect

the

time

at

which

the

kill

mud

will increase

bottom

hole

pressrure.

B)

Maintain

the

driil

pipe

pressure

constant

when

bringing

the

pumps

up

to

kill

speed.

C)

The

surface

line

volume

(pump

to swivel)

does

not

need

to

be

considered

when

starting

the

kill.

D)

The

pumps

must

be

brought

up

to

speed

holding

the

casing

pressure

constant.



WELL

CONTROL

Examples

(Engtish)

05

3. GAUGE

PROBLEMS

KILL

SHEET CALCULATIONS:

VOLUMES:

Surface

to

bit

g4g

strokes

Bit

to shoe

640

strokes

Bit

to

surface

2440

strokes

KICK

DATA:

SIDPP

42

bar

SICP

65

bar

f

CP

79

bar

FCP

45

bar

KILLING

METHOD:

Driiler s

method

PUMP

SPEED:

40 stks/min

3/a.

Use

the

information

from

the above

given

KILL

SHEET

CALCULATIONS

to

answer

the

following

6

questions.

The

circulation

starts

through

the choke

with

the

original

mud.

which

pressure

is

held

constant

while

bringing

the

fumps

up

to

speed?

A.

65 bar

casing

pressure.

B.

79

bar

casing

pressure.

C,

79

bar

drill

piipe

pressure.

D.

65

bar

drill

piipe

pressure.

3/b

After

3 minutes

of

cinculation

the following

gauge

readings

are

observed:

Drill

pipe

pressure,

89

bar

Casing

pressure,

75

bar

Pump

speed,

40

spm

Strokes

circulated,

100

strokes

A.

Increase

the

pump

rate.

B.

Close

the choke

more.

C.

Reduce

the

pump

rate.

D.

Continue

-

E yerything

is

OK

E.

Open

the

choke

more.

what

action

should

be

tak,en?

A.

Increase

the

pump

rate.

B.

Close

the

choke

more.

C.

Reduce

the

pump

rate.

D.

Continue

-

Everything

is

OK

E.

Open

the

choke

more.



WI=LL

CONTROL

Examptes

(English)

05

3lc

After

30

minutes

of

circ

Drill

pipe

pressure,

100

bar

Casing pressure,

8,0

bar

Pump

speed,

40

sprm

Strokes

circulated,

1,200

strokes

What

action

should

be

talken?

Increase

the

pump

rate.

Open

the

choke

more.

Reduce

the

pump

rate.

Continue

-

Evefihing

is

OK

Close

the

choke

more.

A.

B.

c.

D.

E.

3/d.

The

first

circulation

contin

was

started.

The

stroke

counter

was

set

to zero

after

displacing

the

kill

lines

with

mud

at

40

spm.

After

500

strokes

theJoilowing

gauge

readings

are

observed:

-

Drill

pipe

pressure,

g0

bar

Casing

pressure,

gi

bar

Pump

speed,

40

sprm

What

action

should

be

taken?

A.

B.

c.

D.

E.

Increase

the

pump

rate.

Continue

-

Everything

is

OK

Open

the

choke

more.

Reduce the pump

rate.

Close

the

choke

more.

3/e.

As

kill

mud

is

being

circulated,

both

casing

and

drill

pipe

pressureffi

increasing:

Drill

pipe

pressure,

105

bar

Casing pressure,

gr8

bar

Pump

speed,

40

spm

Strokes

circulated,

100g

strokes

What

is

the

problem?

A.

B.

c.

D.

E.

F.

A

plugged

bit

nozzle.

A

pump

problem,

A

plugged

choke.

A

washout

in

the

drill

pipe.

A

washout

in

the

choke

manifold,

A

lost

bit

nozzle.



WEILL

CONTROL

Examples

English)

05

3lf

Later

on

the followirrg

the following gauge

readings

are

observed:

Drill pipe pressure,

41bar

Casing

pressure,

60

bar

Pump

speed,

40

spm

Strokes

circulated,

2530

strokes

What

action

shoulcl

be

taken?

A.

Close

the choke

more.

B,

Reduce

the

pump

rate.

C.

Increase

the

pump

rate.

D,

Continue

-

Everything

is

OK

E.

Open the

choke more..

3lg

The

drill

pipe

pressure

suddenly

increased

from

45

to 54

bar

then

remained

constant.

The casing pressure has remained

constant.

Drill

pipe pressure,

54bar

Casing

pressure,

60 bar

Pump

speed,

40 spm

Strokes

circulated,

2,600

strokes

What

is

the

problem?

A.

A

pump

problem.

B.

A washout

in the

drill

pipe.

C.

A

plugged

bitnozzle.

D.

A washout

in

the choke

manifold.

E.

A

lost

bit nozzle.

F.

A

plugged

choke.

WELL CONTROL Test 05 English

Documents

Transcript of WELL CONTROL Test 05 English