Location
Carrol County, Ohio
Application
8.75″ Vertical Section
Tool
Ulterra’s 6.75″ Mitigator™
Bit Size/Type
8.75″/Various
Drilling Objective
An operator drilling in Carrol County, Ohio wanted to reduce the percentage of DBRs in their 8.75” vertical section.
Challenges
- Reduce frequency of catastrophic dulls caused by drill bit over-engagement
Solution
Collaborating with the customer, our team recommended adding a Mitigator™ to the BHA to reduce torsional shock in the BHA to improve drilling dynamics and bit dull grades.
Results
Across nine runs on air with the Mitigator, this operator:
- Improved outer dull conditions from 5.75 (standard BHA) to 3.2 (with Mitigator)
- Increased average footage drilled from 4,045 ft. (standard BHA) to 4,199 ft (with Mitigator)
More Performance Details
| Average | Standard BHA (8 Runs) | BHA with Mitigator (9 Runs) |
| Footage | 4,045 ft. | 4,199 ft. |
| Hours | 32.2 hours | 38.8 hours |
| ROP | 125.8 ft/hr | 108.3 ft/hr |
| Inner Dull Grade | 3.625 | 1.8 |
| Outer Dull Grade | 5.75 | 3.2 |
| DBR % | 100% | 33% |