The right tools for a difficult job
As part of a workover at an offshore platform in the Gulf of Mexico, a bridge plug set in a highly deviated well section required removal. Due to the difficulties involved, the operator asked Schlumberger to deploy its ReSOLVE iX service to pull up the junk basket and the plug underneath.
Because some debris was expected, Schlumberger recommended an intervention package including the ReSOLVE iX service active debris removal tool. A key component of the toolstring included the anchor-linear actuator tool, which can be extended and retracted for performing multiple shifts in any direction, all in one run. A key feature of the ReSOLVE iX service’s anchor-linear actuator tool is its use of real-time measurements to confirm the precise force and displacement applied downhole, with continuous measurements of displacement down to less than 1-mm resolution.
Pulling and pushing with 16,000 lbf of linear force
Once the intervention began, the Schlumberger team deployed the actuator tool, which is capable of developing up to 16,000 lbf [71,170 N] of stroke up or down. As a contingency, a WIReD wireline inline release device was placed under the anchor-linear actuator tool so that the junk basket could be properly retrieved.
During the first run with the actuator tool, the junk basket was latched and pulled free with 3,500 lbf [15,570 N] of upward force. Retrieved to the surface, the junk basket was full of debris. A second run was made using the same assembly to engage the third-party bridge plug. After latching was confirmed, the anchor was deployed and the linear actuator was retracted. As expected, the plug equalized after traveling 2 in, which matched the plug specifications for stroke and force.