Well Flowing After Disconnecting The Wireline Lubricator – Well Control Situation

Please watch the footage below. It was a flow back after breaking out the lubricator on the rig floor.

We don’t know full details what was happened but from what we’ve seen in this VDO, it shown that the well was flowing after the wireline operation was completed. The crew broke out the connection between the wireline lubricator and the string set on the rotary table.  Few seconds after the connection was removed, the well flowed back. The flow became stronger as you can see the drilling fluid was pushed out from the drillstring quickly and the rotary table started to turn black. The lubricator was pushed by hydraulic power from the mud and it was swung around. Eventually, the crew went back to connect the lubricator to the string and the well stopped flowing.  It seem like the situation was under control at the end. Luckily, there was no gas or any spark that can cause fire on the rig floor.

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Bullheading Calculation Example

Bullheading is one of the well control methods that involve pumping formation fluids back into formation into a shut-in well. You can read the basic details about bullheading from this link  https://www.drillingformulas.com/bullheading-well-control-method/. For this time, this article will be focused on a calculation example for bullheading operation.

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Design Factors Relating To Properly Design The Right Size of Mud Gas Separator for Drilling Rig

A mud gas separator or poor boy degasser or gas buster is one of the most critical well control equipment on drilling rigs. It is used to separate gas kick from drilling mud while circulating kick out of wells or circulating gas while drilling or workover operations. The mud gas separator used on drilling rigs is typically a vertical cylindrical vessel with many baffle plates inside because vertical vessels have small footprints. The drilling mud from the well goes into the mud gas separator and hits baffles. Then gas will be removed due to hitting action. The gas will go up and exist to atmosphere via a vent line at the top of the vessel. The drilling fluid drops after colliding baffles and exists the mud gas separator through the line and return to a mud pit.

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Blow Out Preventer (BOP) Equipment VDO Training

BOP equipment is one the most critical equipment for well control operation. Learning about it via VDO training is a good way to understand this subject because you can see what the equipment look like, how these equipment relates to the operation. This VDO will teach you several topics about the BOP equipment as BOP stack, choke manifold, choke panel, accumulator, etc. Additionally, the full VDO transcript is provided to aid your learning.

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Blow Out on The Rig Floor VDO

This short VDO will show you how fast of the kick blowing out to the surface. It is worth for your time to watch and learn from this 57-second vdo.

We don’t know detail about it why this was happened but we can learn from this incident.

  • Always monitoring the well while drilling
  • Be proactive of well control indicators
  • Frequent well control drills are recommended to perform.
  • Emergency abandon rig drills must be practiced often.
  • Escape route plan while being on the rig floor
  • Try to be away from the rig floor if you don’t have any tasks involving in drilling operation at that time
  • Always prepare for unexpected situations.

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