Casing Protection and Heat Checking Prevention due to Non-Rotating Protectors

Casing Protection / Heat Checking 
On a previous well, an operator had a failed 16” casing pressure test, due to excessive wear and probable heat checking. WWT’s Non-Rotating Protectors (NRPs) were deployed for the next similar well as a solution to prevent further incidences by protecting the casing on multiple hole sections. 
 
NRP Performance 
WWT Non-Rotating Protectors (NRPs) were installed in the vertical section of the well. A total of 140 SS-658 NRPs were installed at a frequency of one per joint to provide complete tool joint stand-off between the casing and drill pipe. Image 1 represents tool joint contact being eliminated once NRPs were installed.  

Image 2 represents cumulative wear to the casing, after two hole sections were ran without NRPs (left) 
vs the final two sections ran with NRPs (right).  Wear factors were back-modeled based on caliper log 
from the previous well to accurately assess subsequent wells. Actual wear closely aligned with the 
predictions.  Minimal increased wear to the 16’’ casing was measured after running NRPs for two hole 
sections. 2.7M drill pipe rotations were recorded for March and April combined. Wear was primarily 
due to running wireline, tripping, and a reduced NRP coverage to simplify pipe management. After the 
initial success, the operator used WWT NRPs for their remaining drilling campaign.