Plugging EF Landing Nipples and EL Sliding Sleeves
The Evolution Model EFSG Blanking Plug is a positive blank-off tool designed to be run into a Model EF Landing Nipple or into the upper sub of an EL Sliding Sleeve. It holds pressure from both above and below. Conventional wireline tools and techniques are used to run, set and pull the plug.
While running in the hole the mandrel is in the lower position, allowing fluid to bypass through the ports on the bottom sub. When the plug is located and set into the nipple, the mandrel is moved to its upper position, thereby blanking off the ports and providing a complete seal. The mandrel is kept in position by the shear pins.
Running and Setting Procedure
1. Pin the plug to a EC-1 Running tool and attach it to a normal wireline tool string.
2. Run into the hole until the locking dogs are just below the locking groove of the landing nipple.
3. Pick up a strain to locate the up-facing locking dogs into the locking groove.
4. Jar up to shear the lower shear pins on the running tool. Continue upstrain until the mandrel has moved to its full up position. This allows the down-facing locking dogs to engage. Shear the upper shear pins on the running tool. Come out of the hole.
It is imperative that the plug not be pulled until pressure on both sides of it is equalized. The procedure is as follows.
1. Run in with an ERB Pulling Tool and latch onto the fishing neck.
2. Jar to shear the plug’s shear pins and remove the fishing neck and mandrel sub-assembly.
3. Allow sufficient time for the pressure to equalize through the equalization ports.
1. Run in with an ERB Pulling Tool and EAC Probe.
2. As the pulling tool latches onto the lock mandrel fishing neck, the probe collapses only the up-facing locking dogs. The down-facing locking dogs remain extended to prevent the plug from going out the bottom of the landing nipple. Once the dogs are retracted remove the plug from the nipple by upward jarring.