Unconventional Fields

Specific Challenge

Drill through complex, interbedded formation intervals and improve well delivery

REGION - United States REGION - United States

United States

REGION - United States


  • Improve time to drill well and eliminate failure-related trips
  • Drill through complex, interbedded formation intervals
  • Balance side forces, and minimize vibrations while drilling at high-torque, high horsepower


  • NitroForce high-torque and high-flow motor (7-in.and 5-in.) – for increased drilling efficiency and optimized performance in tough conditions
  • Charge® HPE elastomers
  • Experienced Halliburton Sperry Drilling team – to make up for limited onsite personnel


  • Successfully drilled 18 laterals, 97,607 ft in the basin with zero TFF using the same configuration
  • Reduced well time by 40% in the fastest curve 
  • Improved lateral drilling efficiency by 27%, and enabled the laterals to be drilled in single runs – a new record for the basin
  • Led to additional wells drilled in the Three Forks and Bakken formations using this proven motor/elastomer pairing


Operators in the Williston Basin are in constant pursuit to reduce well time and eliminate trips due to equipment failures. The challenging drilling environment and limited personnel experience are contributing factors to the failure mechanisms observed on equipment. A more resilient mud motor was required to deliver consistent well performance in less time. Halliburton’s new NitroForce® high-torque and high-flow motor technology was introduced for drilling the intermediate and horizontal hole sections, with a goal to increase efficiency and attain top tier performance.


Challenging well designs in this region necessitate premium motors to last under tough drilling conditions. The intermediate drilling sections have many interbedded formation intervals that experience ratty drilling, leading to extra trips for mud motor failure and bit damage. The lateral sections endure downhole temperatures up to 300°F, while holding high differential pressure that contributes to motor trips for failures beyond the predictable downhole hours.


Trips for failure


Improvent in curve section delivery times


Improvement in lateral section drilling efficiency


A powerful mud motor system was paired with a resilient, hard elastomer with high-flow capability and a lower-end transmission system that could endure the high-torque, high horsepower generated. Halliburton recommended 7-in. and 5-in. NitroForce motors to drill the intermediate and production hole sections. The bottomhole assembly (BHA) was modeled to meet the operator’s steering objectives and reduce sliding percentage in the horizontal, while balancing side forces across the BHA and identifying the optimum operating window to minimize vibration.


The new NitroForce bearing assembly used in conjunction with Charge HPE elastomers provided a custom fit, which delivered exceptional performance. This combined solution continued to repeat the same high performance and outstanding one-run laterals when the operator drilled the ThreeForks and Bakken formations, both located in the Williston Basin.

The 7-in. NitroForce motors drilled 18 lateral runs with zero TFF since April 2021. As a result, the customer was able to deliver wells within AFE time, and less. A total of 97,607 ft has been drilled using this configuration. The fastest curve was drilled in 7 hours, showcasing more than a 40% reduction from planned well time, delivering top quartile performance for the customer in the basin.

The 5-in. NitroForce higher speed motor was ideal for the Middle Bakken with the proprietary 1.0 revs/gal and Charge HPE elastomers delivering up to 1400 psi pressure differential. The slower speed 0.68 revs/gal configuration was ideal in the harder, more abrasive Three Forks delivering up to 1000 psi pressure differential. As lateral lengths extended past three miles, the NitroForce motors kept delivering equally outstanding performance throughout the entire section. This configuration improved lateral drilling efficiency by 27% compared to best competition motors in the lateral.

Sperry Drilling Mud Motors

NitroForce® High-Torque, High-Flow Motors

Re-engineered to expand the drilling envelope.

Download Data Sheet

Related products and services

NitroForce® High-Torque, High-Flow Motor

NitroForce® High-Torque, High-Flow Motor

Provides the power and performance to consistently deliver faster and longer runs.



Halliburton delivers drilling performance to increase asset recovery, improve wellbore quality, and reduce overall well construction costs.


Ready to take the next step?

Talk with a Halliburton NitroForce expert

Get in Touch