Abstract
Abstract
Optimization of drilling performance with low-risk technologies has become the main challenge for Abu Dhabi Onshore Operator. This paper presents a step change in the drilling operations with the successful deployment of a proven technology solution (of wellbore clean up scrapers which can be added to the drilling assembly) in the new wells, allowing an improvement of the well's drilling time by 1-1.5 rig days for each well.
Following the successful implementation in Abu Dhabi Onshore pilot wells, deployment of the Scraping While Technology (or, SwD) in the new wells have now become part of the standard operations, bringing in direct savings of 65 million-USD to the Operator.
The proposed innovative application allows to combine the wellbore clean up scrapers for 7 inches liner and 9.625 inches casing as part of the drilling Bottom Hole Assembly (BHA) for the last open hole section (6 inches or 6.125 inches) of the well. The Scraper While Drilling tools are dormant while the drilling activity is ongoing and can be hydro-mechanically activated on-demand by dropping steel balls from surface at the end of the drilling activity. Upon activation, the scraper blades from the SwD tools extend outwards and push against the ID (inner diameter) of the casing or liner. The solution allows scraping the casings and liners across the completion packer setting depths while pulling out of the drilling assembly and thereby leaving the completion interval ready for either recording the cased hole logs or running the completion jewellery. This implementation of the SwD saves the operator between 1 to 1.5 rig days per well by allowing the operator to cancel dedicated clean out scraper run(s).
There is no limitation for Scraper While Drilling deployment with regards to the horizontal hole section lengths. Using the SwD in the drilling assembly eliminates the need for a dedicated well bore clean out conventional scraper run; it also reduces the risk factors by eliminating the pickup, lay down, run in hole, and pull out of hole activities of the dedicated well bore clean out runs with conventional scrapers.
The Scraper While Drilling technology hence revolutionizes a typical well design and its drilling operations by eliminating dedicated clean out scraper runs with conventional scrapers and allowing the operator to drill more wells based on the days saved per well in a long-term drilling campaign.
Reference3 articles.
1. Coretrax platform – https://www.coretrax.com/products/origin/wellbore-clean-up/activated-drilling-scraper-ads
2. Coretrax Case Study – https://www.coretrax.com/well-phases/case-studies/activated-drilling-scraper-reduces-rig-time-and-increases-debris-recovery-for-uae-operator
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