Removing a socket from a cylinder can be challenging depending on the circumstances. If the socket is stuck or wedged inside the cylinder, you can try the following steps to remove it:

1. Apply Lubrication:
   • Spray a penetrating oil or lubricant, such as WD-40, into the opening of the cylinder where the socket is stuck. Allow it to penetrate for some time, as this can help loosen any rust or corrosion that might be holding the socket in place.
2. Use a Rubber Mallet:
   • Tap the side of the cylinder gently with a rubber mallet. The goal is to create vibrations that may help loosen the socket. Be careful not to hit too hard, as you don’t want to damage the cylinder or socket.
3. Apply Heat:
   • If the socket is still stuck, you can try using heat to expand the metal and break the bond. Use a propane torch to heat the area around the socket for a few minutes. Be cautious not to overheat or damage the cylinder or socket.
4. Use Pliers or Vise Grips:
   • If you have enough exposed length of the socket, you can try gripping it with a pair of pliers or vise grips and twisting it counterclockwise (lefty loosey). Apply steady pressure while turning to avoid damaging the socket.
5. Tap with a Hammer and Punch:
   • Insert a punch or a small metal rod into the socket and tap it with a hammer in a counterclockwise direction. The impact may help break the socket free.
6. Create Leverage:
   • If the socket is flush with the cylinder opening, you may need to create some leverage. Attach a wrench or pliers to the socket and use it as a lever to turn the socket counterclockwise.
7. Use Socket Removal Tools:
   • There are specialized tools available, such as socket removal sets or extractor tools, designed for this purpose. These tools can provide additional leverage and grip to remove stubborn sockets.
8. Professional Assistance:
   • If all else fails, or if the cylinder is valuable and you’re concerned about causing damage, consider seeking assistance from a professional mechanic or machinist who has experience with this type of problem.

Remember to exercise caution throughout the process, especially when using heat or tools, as you don’t want to cause damage to the cylinder or create a hazardous situation. Always wear appropriate safety gear, including gloves and safety glasses, when attempting to remove a stuck socket.