Well Control Method Quiz

When the gas is circulated out of the well, the pit level will decrease.

https://www.youtube.com/watch?v=Ot2WNIRy1A0%5B/embedyt%5D

The rationale for the pit volume increasing is due to the behavior of gases when circulated from the high-pressure subsurface environment to the lower-pressure surface conditions. As the gas rises and reaches the surface, the reduction in pressure causes it to expand significantly in volume. To accommodate this expansion of gas within the wellbore annulus, additional drilling mud from the pit must be displaced into the well. Consequently, the volume of mud in the pit decreases, resulting in an increase in the overall pit volume to maintain mass balance. Therefore, the pit volume will increase when gas is circulated from the well.

https://www.youtube.com/watch?v=dIMuXXxg-EM%5B/embedyt%5D

Both driller’s and wait & weight method maintain constant bottom hole pressure.

https://www.youtube.com/watch?v=twsCRBz1T4k%5B/embedyt%5D

The maximum pressure at shoe is when the top of gas reaches the casing shoe.

Ref: Understand shoe pressure – Top of Gas Kick Below the Shoe

Explanation – https://www.youtube.com/watch?v=UGN1vlA9t8w%5B/embedyt%5D

Then answer is C. Casing pressure and drill pipe pressure are the same.

If the first circulation of driller’s method is successful, casing pressure and drill pipe pressure should be reading the same figure which is equal to shut in drill pipe pressure.

https://www.youtube.com/watch?v=ejgYPl3Ka8Q

During a well control operation, maintaining a consistent kill rate is crucial for effective wellbore pressure control. This minimizes confusion for the crew and ensures a smooth well control procedure.
Only adjust the circulation rate if unforeseen complications arise that necessitate a change in strategy.

https://www.youtube.com/watch?v=54bVaWKeVos

Driller’s method requires two circulations to complete the killing operation. The first circulation is to circulate influx out of the well and the second circulation is to pump kill weight mud to kill the well. 

Ref:Driller’s Method in Well Control

Answer – https://www.youtube.com/watch?v=i5cAntWSFQg

There is one circulation required for Wait and Weight method (engineering method).

Ref: Wait and Weight Well Control Method (Engineer’s Method)

https://www.youtube.com/watch?v=v55UGcA9_04

Casing pressure must be held constant while bringing the pump up to speed in order to maintain bottom hole pressure constant.

https://www.youtube.com/watch?v=g7gUHq1foo4

When the pump pressure is lost, there is a high chance that influx will come into the wellbore.
The first thing you should do is to shut the well in to minimize the influx.

https://youtu.be/636CCl0SNds

With any adjustment made to the choke, the casing pressure will reach first and the drill pipe gauge will react later due to lack time which is approximately 1 second per 1000 ft.

Youtube version:

https://www.youtube.com/watch?v=pTjUFtymt74

Drill pipe pressure must be kept constant when the kill mud is out of the bit in order to maintain bottom hole pressure constant.

https://youtu.be/yC2wYqGmLXU

The correct way is to bring the pump up to speed by holding casing pressure constant. Once the circulation is reached, the drill pipe pressure is Initial Circulating Pressure (ICP).

Final Circulating Pressure (FCP) is reached when the kill mud is at the bit.

Regardless of the well control method used, whether it’s the driller’s method or the wait and weight method, final circulating pressure is reached when the kill mud reaches the bit.

Hydrostatic pressure at shoe = 0.052 x shoe TVD x MW
Hydrostatic pressure at shoe =0.052 x 6000 x 10.5 =3,726 psi
Casing pressure = Gas bubble pressure – Hydrostatic pressure at shoe
Casing pressure = 4,500 – 3,726 = 1,224 psi

If the circulation rate is increased, the drill pipe pressure must be increased to maintain constant bottom hole pressure. For this case, the drill pipe pressure remains constant therefore the bottom hole pressure is reduced.

After the first circulation, all of gas is out of the well therefore SIDPP and SICP should be reading the same figure.

Ref: How are pressure and pit volume doing during the first circulation of the driller’s method?

Circulation rate coming down from 40 SPM to 30 SPM results in reduction of circulating pressure. However, if the drill pipe pressure is maintained at the same pressure, the bottom hole pressure will increase.

Wait and weight method creates the lowest pressure at the casing shoe.

Volumetric is another way to eliminate kick in the annulus when the circulation cannot be performed.

Ref: Volumetric Well Control – When It Will Be Used

How To Perform Volumetric Well Control Method

Doesn’t matter how big of the gas, the bottom hole pressure will remain constant.

Casing shoe pressure will increase when the gas moves upwards. The maxium shoe pressure will be seen when the top of gas is at the casing shoe. Once the gas passes the casing shoe, the shoe pressure will remain constant.

When the gas is circulation out, the gas will expand therefore its pressure will decrease.

Casing pressure will increase when the gas is circulated out of the well because casing pressure will compensate the reduction of hydrostatic pressure due to gas expansion.

Bullheading will break the formation in order to push the influx back into the formation.