ProDirectional | Product Sheets
675-78-50V
6-5/8” Power Section
ProFlex Mud Motor
Power Section
High-torque 6-5/8-inch power section built for high-flow directional drilling and high-load BHA applications
ProDirectional | Product Sheets
675-78-50V 6-5/8” Power Section ProFlex Mud Motor Power Section
High-torque 6-5/8-inch power section built for high-flow directional drilling and high-load BHA applications
The 675-78-50V is a 6-5/8-inch mud motor power section designed for high-flow directional drilling and high-load drilling programs. Built to operate across wide flow ranges and deliver consistent torque response, this power section supports stable RPM control and predictable differential pressure behavior. It is compatible with ProFlex motor assemblies and is commonly used in demanding directional drilling and MWD motor configurations where high hydraulic energy and torque output are required.
Power Section Overview
The 675-78-50V converts drilling fluid energy into controlled torque and rotational speed for high-flow, high-load drilling environments.
|
Feature |
Value |
|
Power Section Model |
675-78-50V |
|
Elastomer Type |
007, VPX |
|
Transmission Compatibility |
ProFlex |
|
Flow Range |
300 to 600 GPM |
|
Speed Range |
80 to 159 RPM |
|
Torque Slope |
9.14 ft-lb per psi |
|
Maximum Torque |
10,690 ft-lb |
|
Maximum Differential Pressure |
1,170 psi |
These operating ratings allow the power section to be configured for curve, lateral, and high-load drilling by adjusting flow rate and weight on bit.
Downhole Performance Characteristics
The 675-78-50V provides a strong and linear torque response as differential pressure increases, supporting controlled bit loading and consistent power delivery in high-flow drilling programs. The lower RPM range supports high-torque drilling conditions where maintaining bit speed stability is critical for directional control and motor-driven rotary drilling.
This power section is commonly used for:
• High-flow directional drilling programs
• Long laterals requiring high torque output
• High-load rotary BHAs
• Motor-assisted drilling assemblies
• MWD and survey-intensive drilling environments
These operating ratings make the 675-78-50V well suited for high-load directional drilling, extended lateral sections, and motor-driven RSS and rotary BHA configurations.
Rotor & Stator Construction
Rotor Specifications
|
Parameter |
Value |
|
Overall Length |
188.00 in |
|
Head Length |
7.00 in |
|
Major Diameter |
4.520 in |
|
Eccentricity |
0.256 in |
|
Material |
17-4 PH |
Stator Specifications
|
Parameter |
Value |
|
Overall Length |
194.50 in |
|
Tube OD |
6.75 in |
|
Tube ID |
5.50 in |
|
Material |
4140 HT |
The 007 and VPX elastomer systems are selected for temperature stability, wear resistance, and consistent torque delivery in drilling fluids used in high-flow drilling programs. With controlled rotor-to-stator fit and proper differential pressure management, these elastomers support repeatable performance and improved power section life in demanding directional drilling and MWD applications.
Motor Assembly Details
The 675-78-50V power section is built into 6-5/8-inch ProFlex motor configurations. The sheet includes two assembly configurations with different tool OD and load ratings.
|
Parameter |
ProFlex |
ProFlex (Alt) |
|
Motor Size |
6-5/8” |
6-5/8” |
|
Transmission |
ProFlex |
ProFlex |
|
Tool OD |
7.00 in |
6.75 in |
|
Bit Box |
4-1/2 REG |
4-1/2 REG |
|
Bit-to-Bend Length |
54.7 in |
54.00 in |
|
Overall Length (no stator) |
142.0 in |
100.0 in |
|
Maximum WOB |
54,000 lb |
80,000 lb |
|
Max Overpull to Re-run |
320,000 lb |
287,450 lb |
|
Absolute Overpull |
810,000 lb |
730,945 lb |
These ratings make the 675-78-50V suitable for high-load directional drilling, lateral drilling, and motor-driven RSS applications, depending on the selected motor configuration.
Why ProDirectional Power Sections Last Longer
Each 675-78-50V is:
• Matched for rotor-to-stator fit
• Tested for differential pressure and torque output
• Tracked for run hours and performance consistency
• Supported by field and remote operations teams
This ensures repeatable downhole performance and predictable power delivery rather than relying on generic component tolerances.
Typical Applications
The 675-78-50V is commonly used in:
• High-flow directional drilling
• Long horizontal wells requiring high torque
• High-load curve and lateral drilling
• Motor-driven rotary BHAs
• MWD and survey-intensive drilling programs
Its torque output and flow operating range make it suitable for demanding drilling programs where stable power transfer is required.
Performance Disclaimer
*Power section performance is based on theoretical curves generated using fresh water at operating temperature. Actual downhole results will vary depending on drilling fluid properties, temperature, and rotor-to-stator fit. Operating beyond the recommended differential pressure range will shorten stator life and reduce overall power section reliability.
*All data is provided as a general guide only and may not reflect final or accurate specifications. Users must confirm all details with our team before relying on this information for any operational, technical, or commercial decisions.
Get the 675-78-50V in Your BHA
If you are planning a directional drilling or MWD program that requires high flow capability, high torque output,
and ProFlex motor compatibility, the 675-78-50V is built for the job.