Case Study
A new pipeline construction project in Oklahoma required a horizontal directionally drilled (HDD) bore to allow installation of the pipeline under a creek bed. In such situations, girth welds associated with the field assembly of the pipeline must be coated and protected from mechanical damage through interactions with roller cradles and rocks/aggregate within the bore.
Horizontal Directional Drilling Challenges
- The field assembly of pipeline for installation by horizontal directional drilling produces unprotected girth welds.
- These girth welds must be coated on site to protect the cutback in order to protect them from abrasion and wear occurring during pipe placement and pulling.
- Areas of the pipe damaged during the pull will be susceptible to corrosion and potential pipeline failure.
Project Needs
- Protect corrosion inhibiting, two-part epoxy on girth welds and adjacent FBE cutbacks.
- Provide abrasion resistance over susceptible girth welds.
- Prevent future sub-surface degradation of pulled pipeline.
- Quick and repeatable field application of protective coating.
How Field Applied Composite Wraps Provide Protection...
![Rig side of HDD bore](https://indumar-13bc3.kxcdn.com/wp-content/uploads/2023/02/Rig-side-of-HDD-bore.jpg.webp)
Provided Protection
Although marring and gouging of the neighboring regions of the pipe and composite wrap were detected following the pull, Boreshield™ ARO II exhibited:
By sacrificially absorbing the impact and gouge energy experienced during the pull, the easy to install composite wrap provided protection to susceptible cutback and girth weld regions.
![Pull head installation after pulling](https://indumar-13bc3.kxcdn.com/wp-content/uploads/2023/02/Pull-head-installation-after-pulling.jpg.webp)