Brainscape's Knowledge GenomeTM

Browse over 1 million classes created by top students, professors, publishers, and experts.


See full index

Well Control > General > Flashcards

General Flashcards

1
Q

When killing a well using drillers method what should happen to mud pit volume during second circulation

A

The volume should not change

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

Most kicks are caused by drill crew not

A

Ensuring the hole takes the correct fill on trips

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

Which part of pressure loss acts on bhp

A

Annular pressure loss

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

What 2 variables are considered for calculating hydrostatic pressure

A

Column length and density

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

It’s good practice to keep
Trip records
Pump output figures
Scr
Training records
All the above

A

All the above

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

Scr should be taken every tour using
Sidpp on choke manifold
Drill pipe gauge on drillers console
Gauge on choke manifold
Pump gauge
Mud loggers

A

Dp gauge on choke panel

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

Hydrostatic pressure is the pressure exerted by a column of fluid at rest
True false

A

True

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

Which method of well control has only one circulation and pumps kill mud from the start
Driller
W &W
Volumetric
Bull heading

A

w & w

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

Which method circulates the influx out of the well before kill mud is circulated round the system

A

Drillers

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

Which method of well control would you use if you could not pump and gas migration was suspected

A

Volumetric

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

Primary prevention of blow outs is

A

Correct mud weight

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

Secondary method of well control is

A

Closing bop

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

As gas migrates up the well bore during shut in conditions
Each pressure will increase

A

All pressures increase apart from the bubble pressure which will remain the same
I
C
I

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

If proper dp pressure is not maintained during a kill operation then Bhp will crease or decrease causing losses or another influx
True false

A

True

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

The u tube is balanced when the well is shut in regardless of the difference between sidpp and sicp

A

True

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

A large pit gain will give higher Sidpp & Sicp

A

The bigger the pit gain the higher the Sicp
Sidpp is not effected

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
17
Q

A long volume of kick will result in a higher or lower annulus pressure

A

Higher

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
18
Q

Why is the Sicp higher than the Sidpp

A

Influx is less dense there fore the pressure is higher

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
19
Q

After circulating out the influx using the drillers method should the Sidpp and Sicp be the same

A

Yes

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
20
Q

If the pump was brought up to kill speed and the casing pressure was allowed to increase above Sicp
What would happen

A

Bhp would increase
Sicp should be kept constant whilst bring the pumps up to speed

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
21
Q

A larger pit gain will give higher SIDPP & SICP.

A

False Influx is in the annulus

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
22
Q

When killing a well using the Drillers Method what should happen to the mud pit

A

The volume will not change

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
23
Q

A larger pit gain will give higher SIDPP & SICP.

A

False

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
24
Q

Circulating pressure of several thousand psi at the pump leaves the circulating system i.e. at the shakers, with little or no pressure. Which part of the pressure lost acts on the bottom of the hole?

A

Annular pressure loss

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
25
Q

When killing a well using the Drillers Method what should happen to the mud pit volume during the second circulation?

A

The volume will not change

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
26
Q

Which of the following is the first reliable indication that the well is kicking?

A

Increase in flow rate

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
27
Q

If the mud volume displaced is not equal to pipe displacement, what should you do prior to flow checking the well?

A

Stop tripping & install a full opening safety valve

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
28
Q

During drilling operations your derrickman informs you of an unusual pit level increase.What is the safest response

A

Pull up, shut off pumps & check for flow

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
29
Q

Which of the following best describes the Hard Shut In?

A

With the Remote choke closed; close a BOP; open a side outlet

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
30
Q

Which of the following best describes the Soft Shut In?

A

With the HCR open; open a side outlet; close the BOP; close the HCR

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
31
Q

What should the driller do when he experiences a drilling break?

A

Flow check

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
32
Q

The purpose of shutting in a well is to:

A

Stop further influx coming into the wellbore
AND Allow pressures to be determined

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
33
Q

If total losses occurred while drilling with water based mud what would you do?

A

Stop drilling & fill the hole with water

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
34
Q

Which of the following causes of well kicks is totally avoidable and due to lack of attention

A

Not filling the hole with the right amount of mud

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
35
Q

What do you do if the hole stays full but does not take the correct amount

A

Go back to bottom; circulate bottoms up

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
36
Q

If the well does not flow while circulating but flows when the pumps are shut down

A

An amount equal to pressure loss in the annulus

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
37
Q

If connection gas is noticed while drilling a reservoir what would be considered to be a good drilling practice if an increase in mud weight is not an option at this time?

A

Control drilling rate to ensure only one slug of gas in annulus at any one time AND Try & minimise connection time

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
38
Q

When the pipe is off bottom and the well kicks the recommended practice is to:

A

Install safety valve; secure well & strip to bottom

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
39
Q

Which of the following can cause a well to kick?

A

All of these can
Lost circulation
Swabbing
Not keeping the hole full
Insufficient mud weight

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
40
Q

Why should the well be closed in quickly after a kick has been detected?

A

Minimise the influx into the wellbore
Pressures will be lower on the annulus side

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
41
Q

When encountering gas cut mud we should immediately increase the mud weight

A

You may have to increase the mud weight but first of all you should determine whether or not this will be possible without causing losses.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
42
Q

What is SIDPP with the bit on bottom used to calculate?

A

Mud weight increase needed to kill the well
What type of influx has entered the wellbore

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
43
Q

After shutting in on a kick the SIDPP & SICP have been stable for a while.
Both have now started to slowly increase by the same amount.
What is the probable cause?

A

The influx is migrating up the wellbore

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
44
Q

A larger pit gain will give a higher SIDPP?

A

False

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
45
Q

A larger pit gain will give a higher SICP but SIDPP will remain the same regardless of kick size.

A

True

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
46
Q

The main reason for calculating the influx gradient is:

A

To make arrangements to handle the kick on surface

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
47
Q

If a gas kick is taken in a horizontal well what would you expect SICP to read?
A: SICP would be a lot higher than SIDPP

B: SICP would be a lot lower than SIDPP

C: SICP would about the same as SIDPP

D: SICP would be the same as in a vertical well

E: You cannot read SICP in a horizontal well

A

SICP would about the same as SIDPP

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
48
Q

After a kick has been shut in and pressures have stabilised then
Formation Pressure = Mud Hydrostatic Pressure in the String + SIDPP.

A

True

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
49
Q

When should MAASP be re-calculated?
A: After every bit change

B: After every 1000 feet drilled

C: After every mud weight change

D: After a successful BOP test

E: After all of the above

A

After every mud weight change

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
50
Q

Surface line volume does not have to be taken into consideration when pumping
Kill Mud down the string.

A

False

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
51
Q

The Leak Off Test shows the amount of surface pressure added to the column of
mud hydrostatic to cause a formation break down.

A

True

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
52
Q

A Leak Off Test is used to determine the maximum mud weight or maximum
surface pressure before lost circulation is likely to occur at the shoe.

A

True

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
53
Q

In order to get accurate leak off test information you need:
A: Known shoe TVD

B: Known and consistent mud weight in the well

C: An accurate pressure gauge

D: All of the above

E: None of the above

A

D: All of the above

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
54
Q

When killing a well using the Wait & Weight Method what will happen to the pit volume
the moment gas starts to enter the choke?
A: The pit volume will increase

B: The pit volume will decrease

C: The pit volume will stay the same from now on

D: The pit volume will fluctuate erratically

E: The pit volume should not be monitored during a kill

A

As gas is circulated out the well through the choke the pit level will fall.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
55
Q

As gas is circulated up the annulus to surface what will happen to the pit volume?
A: The pit volume will increase

B: The pit volume will decrease

C: The pit volume will stay the same from now on

D: The pit volume will fluctuate erratically

E: The pit volume should not be monitored during a kill

A

A: The pit volume will increase

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
56
Q

The two common kill methods, Drillers and Wait & Weight, both have
one thing in common:
A: Both kill the well in one circulation

B: Both have a minimum non-circulating time

C: Both minimise pressure at the casing shoe

D: Both keep bottom hole pressure constant

E: Both need two pumps on the hole

A

D: Both keep bottom hole pressure constant

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
57
Q

When circulating out a gas kick the greatest applied pressure to the casing shoe
happens when the gas bubble is:
A: At surface

B: At the casing shoe

C: At the bottom

D: The pressure remains the same during the kill

A

B: At the casing shoe

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
58
Q

The most important reason we want to know where an influx is in the annulus is because:

A: Drill pipe pressure is adjusted according to bubble position

B: Casing pressure is adjusted according to bubble position

C: We need to maintain a constant drill pipe pressure

D: We want to know when the bubble is at the shoe

E: None of the above are correct

A

If you have not exceeded MAASP by the time the bubble enters the shoe
then you won’t for the remainder of the kill as long as you continue to do
things correctly.

It is, therefore, useful to know when the bubble is inside the shoe.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
59
Q

Pump speed should vary during a kill operation to maintain constant BHP.

A

False

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
60
Q

How many circulations are there in the Drillers Method?

A: One

B: Two

C: Three

D: The Drillers Method does not involve circulation

A

B: Two

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
61
Q

How many circulations are there in the Wait & Weight Method?

A

one

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
62
Q

How do you bring a pump up to speed for a kill operation on a surface stack?

A: Open the choke to maintain drill pipe pressure constant until up to speed

B: Open the choke to maintain casing pressure constant until up to speed

C: Both A & B can be used for a start up

D: Neither A & B can be used for a start up

A

Casing pressure should always be held constant during the start up.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
63
Q

Whilst circulating out a kick the mud pump fails.

What is the first thing you should do?

A: Fix the pump as soon as possible

B: Change over to the other pump

C: Shut the well in

D: Use the Volumetric Method

E: Make preparations to start bullheading

A

C: Shut the well in

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
64
Q

When making adjustments to the Remote Choke during a kill operation what responses
would you expect to see if the choke was closed slightly?
A: Casing gauge decrease followed by Drillpipe gauge decrease

B: Drillpipe gauge increase followed by Casing gauge increase

C: Casing & Drillpipe gauges will drop together

D: Casing gauge increase followed by Drillpipe gauge increase

E: Casing & Drillpipe gauges will rise together

A

D: Casing gauge increase followed by Drillpipe gauge increase

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
65
Q

What pressure is kept constant while filling the annulus with Kill Mud?

A: Initial Circulating Pressure

B: SICP minus Choke Line Friction

C: Final Circulating Pressure

D: Original SICP

E: Original SIDPP

A

Drillpipe pressure should be held constant at FCP as Kill Mud
fills the annulus.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
66
Q

On a surface stack rig how can you find ICP when a kick has occurred
and the slow circulating rate pressure loss is not known?

A: Bring the pump up to speed holding casing pressure constant

B: Bring the pump up to speed adding 200 psi to casing pressure for safety

C: Add 100 psi safety to drillpipe pressure & circulate the influx out

D: Bring the pump up tp speed holding drillpipe pressure constant

E: Circulate at desired SPM holding 200 psi safety on drillpipe

A

A: Bring the pump up to speed holding casing pressure constant

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
67
Q

FCP is reached when:

A: The influx has been removed from the well

B: Kill mud reaches the bit

C: Kill mud reaches the shoe

D: Kill mud returns at surface

E: The pit level has stopped fluctuating

A

FCP is reached when kill mud is at the bit.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
68
Q

While circulating out a kick pump speed is increased while holding drillpipe
pressure constant.
What happened to BHP?

A: It increased

B: It stayed the same

C: It decreased

A

C: It decreased

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
69
Q

After the first circulation of the Drillers Method SIDPP & SICP should be:

A: Zero

B: SICP should be slightly higher than SIDPP

C: The same

D: SIDPP should be slightly higher than SICP

E: None of the above are correct

A

C: The same

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
70
Q

A gas kick is being circulated from a well at 30 SPM with 750 psi being held constant on the drillpipe pressure gauge. The pump speed is increased to 40 SPM while continuing to
hold drillpipe pressure constant.

The bottom hole pressure will:
A: Decrease

B: Increase

C: Remain constant

D: Drop to zero

E: Insufficient data for the calculation

A

A: Decrease
If the pump speed is increased then drillpipe pressure should
also increase. You have not allowed it to increase therefore
you are holding it at a lower reading than it should be at.

The result is that BHP will fall.

In this example drillpipe pressure should rise to approximately 1333 psi.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
71
Q

Which of the following methods will result in the lowest casing shoe pressures
if open hole volume is considerably larger than string volume?

A: Drillers

B: Wait & Weight

C: Concurrent

D: Volumetric

E: Company Man’s

A

Wait & Weight method.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
72
Q

Which of the following kill methods would you use if you could not circulate
and you suspected gas migration was taking place?

A: Drillers

B: Wait & Weight

C: Concurrent

D: Volumetric

E: Company Man’s

A

Volumetric.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
73
Q

What happens to the pressure below a gas bubble as it is circulated from
the well during a kill operation?

A: It remains constant

B: It decreases

C: It increases

D: It rises at first then remains constant

E: It falls at first then remains constant

A

All pressures below a gas bubble remain constant.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
74
Q

What happens to casing shoe pressure as a gas bubble is circulated from a well
during a kill operation?

A: It remains constant

B: It decreases

C: It increases

D: It rises at first then remains constant

E: It falls at first then remains constant

A

Casing shoe pressure will rise as the gas bubble travels towards it
and then remain constant once it has passed.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
75
Q

What happens to the pressure inside a gas bubble as it is circulated from
a well during a kill operation?

A: It remains constant

B: It decreases

C: It increases

D: It rises at first then remains constant

E: It falls at first then remains constant

A

As the gas bubble expands the pressure inside it falls.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
76
Q

What happens to the pressure on the casing gauge as a gas bubble is circulated
from a well during a kill operation?

A: It remains constant

B: It decreases

C: It increases

D: It rises at first then remains constant

E: It falls at first then remains constant

A

Casing pressure will rise as the gas bubble is circulated up to surface.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
77
Q

What happens to bottom hole pressure as a gas bubble is circulated from a well
during a kill operation?

A: It remains constant

B: It decreases

C: It increases

D: It rises at first then remains constant

E: It falls at first then remains constant

A

BHP reamins constant through the kill operation.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
78
Q

Why will a 20 bbl kick in a small annulus be more significant than a
20 bbl kick in a large annulus?

A: The kill weight mud cannot be calculated as easily

B: The kicks are usually gas

C: The pipe may become stuck in the smaller annulus

D: It results in higher annulus pressures

E: It results in higher drillpipe pressure

A

The influx will be longer in a smaller annulus and this will lead to
higher pressures in the annulus.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
79
Q

The reason SICP is usually higher than SIDPP is:
A: The cuttings in the annulus are lighter than the mud weight

B: The influx fluid is usually less dense than the mud weight

C: The casing pressure depends on the rig type

D: The difference is in the type of gauges used

E: This is a red herring as SIDPP is usually higher than SICP

A

SICP is usually higher due to the lighter influx being in the annulus
and clean mud being in the drill string.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
80
Q

After the first circulation of the Drillers Method the well is closed in. The following
pressures were recorded on the surface gauges:

SIDPP = 700 psi SICP = 700 psi

Is this the type of reading you would expect?

A: Only if the influx is a fluid

B: Only if the influx is a gas

C: Yes

D: No

E: Never

A

After the first circulation of the Drillers Method you should have
removed the influx from the well. Once shut back in SIDPP and
SICP should be reading approximately the same.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
81
Q

On a surface stack rig what would happen if when bringing the pump up to kill
rate speed you allowed the casing pressure to increase above SICP?
A: BHP would increase

B: BHP would stay the same

C: BHP would decrease

D: It will be OK as drillpipe pressure will rise by the same amount

E: As long as SIDPP remains constant everything will be fine

A

Casing pressure should be held constant while brining the pump
up to kill rate speed. By allowing it to increase you will also
increase the pressure on the bottom of the hole.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
82
Q

When a gas kick is circulated out through the choke the pit volume will:

A: Increase

B: Decrease

C: Stay the same

A

Pit volume will decrease.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
83
Q

During a kill operation the choke operator notice drillpipe pressure shoots up rapidly while
casing pressure remains pretty much constant. He decides to live with the new reading
on the drillpipe pressure gauge which is 400 psi higher than it had been.

What effect will this have on bottom hole pressure?

A: Bottom hole pressure will increase

B: Bottom hole pressure will decrease

C: Bottom hole pressure will remain constant

D: There is not enough information to tell

A

The indications here are that a nozzle has plugged. The new pumping
pressure is correct for the new conditions.

By doing nothing bottom hole pressure will remain constant.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
84
Q

During a kill operation the choke operator notices a sudden increase in casing pressure
followed by a comparable increase in drillpipe pressure. He decides to live with the new
reading on the drillpipe pressure gauge which is 200 psi higher than it had been

What has happened to bottom hole pressure?
A: Bottom hole pressure will increase

B: Bottom hole pressure will decrease

C: Bottom hole pressure will remain constant

D: There is not enough information to tell

A

The indications here are that the choke has plugged. Ideally you should
change chokes but if that is not possible then you should attempt to
maintain drillpipe pressure at it’s original value.

By doing nothing bottom hole pressure has increased.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
85
Q

During a kill operation the choke operator finds he is continually closing the choke to
maintain drillpipe pressure as it should be. A short time later the derrickman calls to
say the rig pump has developed a serious leak and he has just noticed.

What effect has the continual closing of the choke had on bottom hole pressure?

A: Bottom hole pressure will increase

B: Bottom hole pressure will decrease

C: Bottom hole pressure will remain constant

D: There is not enough information to tell

A

The serious leak the pump has developed means less mud is now
going down the hole - in effect you are pumping at a slower rate.

The slower you pump the lower your pumping pressure should be.

By maintaining the old higher pumping pressure the choke
operator has increased bottom hole pressure.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
86
Q

After well is shut in on kick SIDP and SICP slowly increase
What is the cause of this

A

The influx is migrating up the well bore

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
87
Q

A larger pit gain will give a higher SIDP
True or false

A

False

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
88
Q

The surface line volume does not have to be taken into consideration when pumping kill mud down the hole

True or False

A

False

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
89
Q

When killing a well using w&w method what will happen to the pit volume the moment gas starts to enter the choke

Increase
Decrease
Stay the same
Fluctuate
No need to monitor

A

As gas is circulated out of the well through the choke the pit level will fall

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
90
Q

As Gas is circulated up the Annulus to surface what will happen to the pit volume

Increase
Decrease
Stay the same
Fluctuate

A

Increase
As gas is circulated to surface it will expand in volume

91
Q

When circulating out a gas kick the greatest applied pressure to the casing shoe is

Gas at surface
At casing shoe
At bottom
Pressure remains constant

A

At the casing shoe as the top of the bubble reaches the shoe

92
Q

The most important reason for needing to know where the influx is in the well is

Adjust Dp pressure to bubble position
Sicp adjusted to bubble position
To maintain constant dp pressure
We want to know when the bubble is at the shoe

A

We want to know when bubble is at the shoe if you have not exceeded Maasp by the time the bubble reaches the shoe then you won’t for the remainder of the kill

93
Q

Pump speed should vary during kill ops

True
False

A

False

94
Q

How do you bring pumps up to kill speed for a kill operation

A

Open the choke to maintain sicp constant until up to speed

95
Q

What pressure is kept constant whilst filling the annulus with kill mud

A

Drill pipe pressure at FCP as kill mud fills the annulus

96
Q

FCP is reached when

The influx is removed from the well

Kill mud reaches the bit

Kill mud at surface

A

FCP is reached when kill mud reaches the bit

97
Q

When circulating out a kick pump speed is increased what happens to BHP

Increase

Decrease

Stay the same

A

As you have not allowed for this increase in dp pressure
Therefore you will be holding a lower pressure and BHP will be reduced

98
Q

First circulation of the drillers method sidpp and sicp should be

Zero

Sicp should be slightly higher

The same

Sidpp should be slightly higher

A

They should both be reading the same original sidpp

99
Q

Which method results in lowest casing shoe pressure if open hole volume is considerably larger than string volume

Wait and weight
Drillers

A

Wait and weight

100
Q

What happens to the Pressure below the gas bubble as it is circulated from the well during kill ops

Increase

Decrease

Stay the same

A

Stays the same

101
Q

What happens to casing shoe pressure as the gas bubble is circulated from the well

Increase

Decrease

Stay the same

Rise then then remain constant

Fall then remain constant

A

Casing shoe pressure will rise as the bubble approaches then remain constant once it is above the shoe

102
Q

What happens to the pressure inside the bubble as it is circulated from the well

Increase

Decrease

Stay the same

A

As the bubble rises the pressure inside will fall

103
Q

What happens to the pressure on the casing gauge as a gas bubble is circulated from the well

Increase

Decrease

Stay the same

Rise then remain constant

Fall then remain constant

A

Increase as the gas bubble rises

104
Q

What happens to bottom hole pressure as the gas bubble is circulated from the well

Increase

Decrease

Stay the same

A

It will remain the same

105
Q

Why will a 20 bbl kick in a small annulus be more significant than a 20 bbl kick in a large annulus

A

It will be longer resulting in higher pressures

106
Q

The reason sicp is higher than sidpp is

Cuttings in annulus are lighter

Influx fluid is less dense than mud

A

Influx fluid is less dense than mud

107
Q

After the first circulation of the drillers method the sicp is 700psi and sidpp is 700psi
Is this the type of reading you would expect if

Only if the influx is fluid

Only if the influx is gas

Yes

No

A

Yes as the influx is out and mud is now all the way round

108
Q

What would happen if you brought the pump up to kill rate speed and allowed the casing pressure to increase above sicp

BHP would increase

BHP would stay the same

BHP would decrease

A

BHP would increase

109
Q

During kill operation the choke operator notice drill pipe shoots up rapidly whilst casing pressure remains constant
He decided to live with the new reading on the drillpipe pressure gauge which is 400psi higher than it had been
What effect will this have on BHP

Increase

Decrease

Stay the same

A

Possible nozzle plugging the new pump pressure is correct
By doing nothing bottom hole pressure will remain constant

110
Q

During a kill operation the choke operator notices a sudden increase in sicp follows by and increase in sidpp of 200psi on the sidpp
He decides to live with the increase what will happen to BHP

Increase

Decrease

Stay the same

A

Indication of the choke plugging
Swap chokes if possible if not attempt to maintain sidpp at its original value
By doing nothing BHP has increased

111
Q

During kill operation the choke operator finds he is continually closing the choke to maintain sidpp as it should be
A short time later the derrickman calls to say the pumps are leaking
What effect will this have on BHP

Increase

Decrease

Stay the same

A

Less mud going in the well which is the same as the pump going slower
Resulting in a lower pressure by trying to maintain the older higher pressure the choke operator has increased the BHP

112
Q

The reason sicp is higher than sidpp is

Cuttings in annulus are lighter

Influx fluid is less dense than mud

A

Influx fluid is less dense than mud

113
Q

After the first circulation of the drillers method the sicp is 700psi and sidpp is 700psi
Is this the type of reading you would expect if

Only if the influx is fluid

Only if the influx is gas

Yes

No

A

Yes as the influx is out and mud is now all the way round

114
Q

What would happen if you brought the pump up to kill rate speed and allowed the casing pressure to increase above sicp

BHP would increase

BHP would stay the same

BHP would decrease

A

BHP would increase

115
Q

During kill operation the choke operator notice drill pipe shoots up rapidly whilst casing pressure remains constant
He decided to live with the new reading on the drillpipe pressure gauge which is 400psi higher than it had been
What effect will this have on BHP

Increase

Decrease

Stay the same

A

Possible nozzle plugging the new pump pressure is correct
By doing nothing bottom hole pressure will remain constant

116
Q

During a kill operation the choke operator notices a sudden increase in sicp follows by and increase in sidpp of 200psi on the sidpp
He decides to live with the increase what will happen to BHP

Increase

Decrease

Stay the same

A

Indication of the choke plugging
Swap chokes if possible if not attempt to maintain sidpp at its original value
By doing nothing BHP has increased

117
Q

During kill operation the choke operator finds he is continually closing the choke to maintain sidpp as it should be
A short time later the derrickman calls to say the pumps are leaking
What effect will this have on BHP

Increase

Decrease

Stay the same

A

Less mud going in the well which is the same as the pump going slower
Resulting in a lower pressure by trying to maintain the older higher pressure the choke operator has increased the BHP

118
Q

Name two positive indicators of a kick

A

Flow rate increase
Pit volume increase

119
Q

Name warning signs of a kick

A

Pump pressure decrease
Pump stroke increase
Drilling break
Increase in torque and drag
Incorrect hole fill volume
Splinter cuttings

120
Q

Causes of kicks

A

Fail to fill hole
Swabbing
Insufficient mud weight
Abnormal pressure
Excessive rop in gas bearing sands

121
Q

Soft shut in

A

Pick up with pumps running
Space out
stop rotating
Stop pumps
Open HCR
Close bop
Close remote choke
Record sidpp sicp TVs pit gain

122
Q

Hard shut in

A

Pick up pumps running
Space out stop rotating
Stop pumps
Close bop
Open HCR
Record sidpp sicp TVD pit gain

123
Q

What are the advantages of the Drillers method

A

Little or no calculations, only need to know kill mud weight asap
Minimizes the chance of gas migration
Can get going as soon as pressures stabilize

124
Q

What are the disadvantages of the Drillers Method

A

Highest annular pressures for the longest period of time
Longest on choke time due to two circulations

125
Q

First Circulation of Drillers method of start up is-

A

1.Bring pumps up to speed maintaining a constant BHP using the CHOKE & SICP
2.Once up to kill speed, switch attention to the DP GAUGE and maintain ICP until the kick is out of the hole
3. Shut down the pumps and SICP should = SIDPP. If not, then the influx is not fully out of the hole or a secondary influx may been taken, continue circulating.

126
Q

Second Circulation of Drillers Method is

A
  1. Bring pumps up to speed, monitor CASING GAUGE, maintaining a constant BHP as before
  2. Once up to speed maintain a constant CASING PRESSURE whilst kill mud is being pumped to bit
  3. Once kill mud reaches the bit then switch attention to the DP gauge and keep FCP constant by operating choke until well is circulated to kill mud
127
Q

What are the Disadvantages with Wait and Weight

A

More Calculations
Bigger chance of Gas Migration (whilst mixing kill mud)
Settlement of cuttings, potential for annulus pack-off (due to above)
More Waiting

128
Q

What are the advantages of Wait and Weight

A

Less time on choke
One Circulation
Will give the lowest casing shoe pressure when the open hole capacity is greater than the drill string volume!

129
Q

What is the steps taken during Wait and Weight Method

A
  1. Bring pumps up to kill speed maintaining a CONSTANT CASING PRESSURE using the CHOKE & CASING GAUGE. Watch Casing gauge and keep BHP constant as kill mud is pumped to bit to maintain pressure drop from ICP to FCP
  2. When kill mud reaches the bit switch attention to the DP gauge and hold FCP constant until kick is pumped to surface, followed by the DP contents and the kill mud.
  3. Shut down the pumps, check for flow. SICP and SIDPP should read zero
130
Q

List indications of increasing formation pressure

A

Drilling break / increase in ROP
Increased torque & drag, fill on connections
Increase in total gas levels
Gas cut mud
Increase in flow-line mud temperature
Increase in mud salinity (salt dome or salt water invasion)
Heaving shale’s (sloughing) increased cavings, splintery or elongated cuttings
Shale density changes from normal compaction

132
Q

When closing in a well on a casing string should the annulus or string be closed first

A

Close in the smaller path of fluid first in this case it would be the Annulus closed in first then the casing string

133
Q

When does cement stop applying hydrostatic force

A

During the setting phase

134
Q

How to combat H2S

A

Keep PH high

135
Q

Is H2S soluble in WBM

A

Yes

136
Q

What Drill pipe should be used for H2S wells and why

A

X95 due to its high carbon content

137
Q

As gas migrates SIDPP and SICP will climb. How do you maintain constant BHP

A

Bleed off pressure via choke to maintain SIDPP to original shut in value .this is a short term fix

138
Q

How to find out how much the base of the influx has migrated

A

Divide the pressure increase by the mud gradient

139
Q

How to find the pressure at the shoe

A

Remove all hydrostatic pressure from below the shoe from the formation pressure

140
Q

How long are test charts kept for

A

2 years

141
Q

If ICP is less than calculated value what should you do

A

Stop and investigate discrepancies

142
Q

During first circulation If a nozzle was blown out during well kill operation and SICP remained constant what would happen to BHP

A

Stay the same

143
Q

What are the advantages of the Drillers method

A

Minimum Calculations
Minimum waiting time
Minimum Information required

144
Q

What are the Disadvantages of the Drillers method

A

Highest Annular Pressure Produced
Maximum Well under pressure time
Longest onchoke time

145
Q

What are the start up and shut down steps During the first circulation of the Drillers method

A

Maintain constant choke pressure as the pump is being brought up to kill rate
Once at kill rate maintain the drill pipe pressure constant this is ICP
Once the influx has been circulated out maintain constant Casing pressure using the choke as the pump is switched off. SIDPP is now the same as SICP

146
Q

What are the start up and shut down steps during the second stage of the Drillers Method

A

Line up both pumps to kill mud
Bring the pump up to kill speed using the choke to maintining SICP constant
Zero strokes when kill mud is at rig floor
Maintain sidpp step down asKill mud is pumped to the bit ( SIDPP will decrease)
Once the kill mud is at the bit maintain SIDPP constant at foppish
Once kill mud is exiting the choke
maintain SICP whilst switching off pump SIDP and SICP should be zero

147
Q

Steps to take if pump speed is required to be adjusted if the mud weight in the string is constant

A

Note SICP
Maintain SICP whilst adjusting the choke
As soon as the pumps are at new pump speed
Note new SIDPP Swap back to SIDPP and maintain this new pressure

148
Q

Advantages of W&W

A

Lowest well bore pressure
Lowest surface
Minimum on choke time

149
Q

Disadvantages of W&W

A

Long waiting times weighing up mud Gas migration
Large increase in Mud weight

150
Q

What are the steps to carry out W&W method

A

Line up Both pumps on Kill mud
Start pump and bring up to kill speed using choke to maintain SICP
Zero strokes when kill mud at rig floor
Once at kill rate
Drill pipe pressure will steadily drop
Once the Kill mud reaches the bit SIDPP is maintained at FCP using the choke untill Kill mud is observed at the choke
SICP is held constant using choke whilst pump is shut down
SIDP and SICP should be zero unless pressure is trapped in system

151
Q

Well control events can have an impact on

A

Result in over regulation

152
Q

What is Iwcf gauge question tolerance

A

70psi

153
Q

Calculating hydrostatic pressure when two fluids of different density exist

A

Work out the different hydrostatic pressures and add them together

154
Q

What is permeability

A

Permeability is the ability of a porous medium to transmit fluids (To permit fluid to pass through a formation)

155
Q

What is porosity

A

Much like a sponge it is how much fluid is contained inbetween the rock grains

156
Q

What situations can exist where SIDPP is greater than SICP

A

The bit is above the influx
Horizontal wells
Formation fluid has entered the Drill string
Heavy brine kick
Well packed off

157
Q

What do IWCF call a TIW

A

DPSV Drillpipe safety valve

158
Q

What will SICP and SIDPP be if a swabbed kick is circulated out and the pump is shut down

A

Current MW is adequate so both gauges will read zero

159
Q

Will H2S dissolve in WBM

A

Yes

160
Q

As a rule of thumb gas reaches it bubble point at what depth

A

2000ft. To 3000ft

161
Q

What are kick indicators

A

Flow rate increase
Pit volume increase
Incorrect hole fill when tripping

162
Q

Who needs to sign well barrier pressure test charts

A

Toolpusher
Drilling/ well intervention supervisors
Pump operator

163
Q

What information needs to be included on the chart

A

Type of test
Test pressure
Component tested
Estimated volume of system pressurised
Volume pumped
Authorised person’s signature

164
Q

Definition of an influx test

A

A test in which the hydrostatic pressure is reduced such that the net differential pressure is from the formation into the well
Also referred to as a negative test

165
Q

If gas starts to migrate and the choke is kept closed what will happen to BHP

A

Increase ICI

166
Q

After a gas kick has been shut in and pressures stabilised if gas starts to migrate and SIDPP is kept at original Sidpp what will happen to BHP

A

I’m will stay the same

167
Q

If the choke is adjusted to maintain original SICP as the gas migrates what will happen to BHP

A

BHP will decrease

168
Q

How to find the pressure at the casing shoe once the influx is out of the annulus and the pump is shut down

A

Hydrostatic pressure above the shoe including the sicp

169
Q

What happens to casing shoe pressure as kill mud enters the annulus

A

Casing shoe pressure decreases

170
Q

Total accumulator volumes refers to what

A

Total volume of nitrogen and hydraulic fluid

171
Q

An koomey system should be equipped to recharge in how many minutes

A

2 minutes

172
Q

What are blowdown lines used for

A

To prevent overloading the poor boy

173
Q

Where are blowdown lines located

A

Downstream of the choke

174
Q

What is the recommended capacity of the bop hydraulic reservoir on a koomey unit

A

Two times the usable fluid capacity

175
Q

What should the BOP stack be tested to during initial acceptance test

A

150% of rated capacity

176
Q

What is the api recommendation for testing BOP

A

Prior to installation on well
After BOP repair
Within 21 days

177
Q

After installation of BOP on well a sensible precaution is to -

A

Function test all items on the stack

178
Q

Prior to installing BOP on the well it is advisable testing the BOP to -

A

100% of its rated pressure

179
Q

What should be done to prevent corrosion of BOP components when dealing with H2S

A

Maintain high PH
Drill with OBM
An addition of zinc carbonate to the mud

180
Q

During a BOP test test water is observed exiting the weep hole what action should be taken

A

Replace the mud seal

181
Q

What is the preferred method to operate a diverted

A

Automatic system that will close the diverted once the vent line valve is open

182
Q

What piece of equipment can function as a diverted with pipe in the hole

A

Rotating head or rotating BOP

183
Q

If the vent line had no valve where should it be located

A

Above the flowline

184
Q

Which annular is NOT wellbore assisted

A

Cameron D

185
Q

Which annular is commonly used as a diverted

A

Hydril MSP

186
Q

What is the maximum closing pressure of pipe rams

A

3000psi

187
Q

What chemicals can damage the annular element

A

Methanol and nitrogen

188
Q

When should a BOP be tested

A

Prior to to being put into operation
After repair
Every 21 days
In accordance with local laws

189
Q

When should a diverted be function tested

A

Upon installation and every 7 days

190
Q

What pressure should the diverted be tested to

A

250psi for 5 mins with no visual leaks

191
Q

Diverted closing times are

A

20 inch and smaller 30 seconds
Above 20 inch 45 seconds

192
Q

What ID should a choke hose have

A

MASP up to 5000psi 2” above 5000psi 3”

193
Q

How to remove and prevent hydrates

A

Inject glycol to prevent it and inject methanol to remove it

194
Q

What effects the value of the SICP

A

Hole or Annulus capacity
Pore pressure
Kick volume

195
Q

When does a salt water kick give the most surface casing pressure

A

Immediately after the well has been shut in

196
Q

If the influx is in the horizontal section of the well would the sidpp and SICP be the same

A

Yes

197
Q

If the influx is below the bit will sidpp and SICP be the same

A

Yes

198
Q

When does gas cut mud reduce BHP the most

A

When it is at surface

199
Q

If a a kill has been delayed and pressures start to increase what is the safest way to keep BHP constant

A

Bleed off mud keeping Drill pipe pressure constant

200
Q

What is meant by abnormal pressure relating to fluid pressure in the reservoir

A

Formation fluid pressure that exceeds formation water hydrostatic pressure

201
Q

What indicates the well may be going under balance

A

A change in shape and cutting size
Increase background gas levels

202
Q

If a shallow gas flow is detected what should you do regarding pump speed as the flow is diverted

A

Increase pump speed

203
Q

If there is a wash in the string what will it effect regards pressures

A

BHP and SCR

204
Q

Is SICP is usually higher than SIDPP if large amounts of cuttings are in the annulus

A

No SICP will be lower

205
Q

Kicks are circulated out slower so as not to overload the ?….

A

MGS

206
Q

If SICP and SIDP are not equal at after first circulation of Drillers method what action should be taken

A

Restart kill using w & w method

207
Q

When does kill mud effect SICP

A

As it enters the annulus

208
Q

If there is a wash in the string what kill method is used

A

Volumetric

209
Q

What three indicators are there that formation fluid pressure is increasing

A

Connection gas
Increase in cuttings size
Increase in torque and drag

210
Q

What is the supply pressure and closing pressure of a Diverter

A

Supply pressure is 3000psi
Closing pressure is 750psi to 1200psi

211
Q

What is used to close a BOP function

A

Stored hydraulic pressure

212
Q

When should Annular closing pressure be adjusted to ensure a positive seal has been achieved in preparation for stripping

A

Once SICP has stabilised

213
Q

What is the main disadvantage with using a flapper valve in the string

A

It is not a tested barrier

214
Q

What is the minimum air pressure which will allow a remote function to be carried out on the koomey

A

90psi

215
Q

Why does the accumulator have stored fluid

A

To ensure API closing times can be achieved
To secure the well in a power outage

216
Q

According to API what is the minimum diameter of the choke manifold bypass line

A

At least equal to the choke line diameter

217
Q

What are blowdown lines used for

A

To prevent the MGS overloading

218
Q

Why is a MGS used to remove gas from the mud instead of a vacuumed degassed

A

MGS can handle more flow

219
Q

When selecting a test pump to pressure test a BOPwhat ration must the pump provide

A

1.1to 1

220
Q

Why is the kill line placed below the lower pipe rams

A

To monitor the well or bullhead with the lower pipe rams closed

221
Q

How will casing pressure react as the drill string is stripped into the influx

A

The sicp will increase due to the influx getting longer
As sicp is the hydrostatic difference between the mud weight grad and the influx grad multipled by the influx height

222
Q

What will happen to BHP when you strip through a gas bubble

A

BHP will decrease

223
Q

Does low permeability formation drilled with OBM make it harder to detect the well flowing

A

Yes

224
Q

According to API 16D what is the time limit which charge pumps must fully recharge the accumulator system

2 mins
5 mins
10 mins
15 mins

A

15 mins

Well Control (1 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2024 Bold Learning Solutions. Terms and Conditions