Case Study Performance Alert | D-Tech Rotary Steerable

Case Study

Performance Alert

D-Tech Rotary Steerable Doubles ROP and Saves $300,000 For Operator in Australia

THE CHALLENGE
- An operator drilling in the Cooper Basin in South Australia wanted to optimize performance on the 8 ½-inch sections of six vertical wells.
- Previous wells in the area had shown a strong formation dip, causing assemblies to build angle, which required numerous correction runs, slowed overall rates of penetration (ROP), and increased costs.
- The D-Tech rotary steerable system (RSS) was selected due to demonstrated superior performance in similar applications in North America and its ability to maintain inclination below one degree in challenging interbedded and abrasive formations.
THE SOLUTION
- The operator deployed a bottomhole assembly (BHA) that included a high-performance D-Tech 675RST system, motor, and MWD system.
- To increase ROP and reduce stick-slip, a 9/10, 2.0 stage, 0.133 rev/gal motor was run between the RST and MWD.
- Operator personnel were able to perform system downlink commands with real-time monitoring completed by D-Tech staff off site.
THE BENEFIT
- The D-Tech RSS drilled 6180m (20,275 ft), doubling the ROP at an average of 62m/hour, while effectively keeping inclination at <1° for the 1100- to 1300m-long sections.
- In addition to increasing the overall ROP, the RSS minimized doglegs within the section and reduced the overall average drilling torque, resulting in a smoother wellbore.
- The operator was able to save more than $300,000 over the course of the campaign.

Details

Location

Southern Australia

Formation

Cooper Basin

Hole Size

8 ½-in. sections of six vertical wells

BHA selected

D-Tech 675RST system, 9/10, 2.0 stage, 0.133 rev/gal motor, and MWD system

footage drilled

6180m (20,275 ft)

benefit

Doubled ROP and Saved $300,000

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