Drilling Motors

Drilling Motors

Horizontal Technology, Inc. provides the best HDD Motors available. A high-torque, low flow motor, engineered to meet the unique demands of horizontal directional drilling, these rugged motors improve penetration rates and last longer, saving the contractor time and money.
Downhole Drilling Motor
375 – 910 – 4.0
  • 3-3/4″ OD
  • 9:10 Lobe
  • 4.0 Stage
  • Slow Speed
  • High Torque

3 3/4″ Mud Motor 9/10 Lobe 4 Stage

Performance Curve 375-910-4-HR
3-3/4” Slow Speed / High Torque / HR

chart on performance curve

Performance Curve 375-910-4
3-3/4” Slow Speed / High Torque

chart on performance curve speed high torque

Downhole Drilling Motor
475 – 910 – 2.0

  • 4-3/4” OD
  • 9:10 Lobe
  • 2.0 Stage
  • Slow Speed
  • High Torque

4 3/4″ Mud Motor 9/10 Lobe 2 Stage
Slick Bearing Housing

chart on dimensions and info on drilling motors for hdd services

Performance Curve 475-910-2
4-3/4” Slow Speed / Medium Torque

chart on performance curve

Performance Curve 475-910-2-HR
4-3/4” Slow Speed / Medium Torque / HR

chart on dimensions and info on drilling motors for hdd services
Downhole Drilling Motor
675 – 910 – 2.0 – SB
  • 6-3/4” OD
  • 9:10 Lobe
  • 2.0 Stage
  • Slow Speed
  • High Torque

6 3/4″ Mud Motor 9/10 Lobe 2 Stage

chart on dimensions and info on drilling motors for hdd services

Performance Curve 675-910-2
6-3/4” Slow Speed / High Torque

chart on dimensions and info on drilling motors for hdd services

Performance Curve 675-910-2-HR
6-3/4” Slow Speed / High Torque / HR

chart on dimensions and info on drilling motors for hdd services

Downhole Drilling Motor
800 – 910 – 4.0

  • 8-0” OD
  • 9:10 Lobe
  • 4.0 Stage
  • Slow Speed
  • High Torque

8″ Mud Motor 9/10 Lobe 4 Stage

chart on dimensions and info on drilling motors for hdd services

Performance Curve 800-910-4
8-0” Slow Speed / High Torque

chart on dimensions and info on drilling motors for hdd services

Performance Curve 800-910-4-HR
8-0” Slow Speed / High Torque / HR

chart on dimensions and info on drilling motors for hdd services
information chart on mud motors
3-3/4" Mud Motor
information on a 8 inch mud motor used for below ground digging
4-3/4"~3-3/4" Sonde Mud Motor
information chart on mud motors
6-3/4" Mud Motor
information on a 8 inch mud motor used for below ground digging
8" Mud Motor

Adjusting the ABH (if equipped)

Setting the adjustable bend housing is a fairly simple operation that can be completed on site. The ability to do on site adjustments reduces downtime and improves guidance capabilities.

infographic on mud motors used in hdd services for oil and gas projects by horizontal technology inc located in texas america and edmonton alberta canada

Drilling Considerations

The performance and life of the motor is determined by the environment in which it operates. To ensure optimum performance and longest life avoid:
  • Abrasive solids in the circulation system. The drilling fluid should have the least possible sand content (1% or less is recommended).
  • Excessive rotation of motor set with higher bend (Anything over 1.5 degrees is considered high bend).
  • Exceeding recommended weight on bit (WOB) loads.
  • Exceeding the recommended pressure drop across the bit & motor.
  • Repeated stalling of the motor.
  • Tripping without actuation of pumps.

Differential Pressure

The primary rig reference for HTI motor operation is the rig pressure gauge. Weight (push) indicator can also be used as a drilling reference; however, it may give inaccurate information about the actual WOB because of other factors, such as the size of the hole the pipe is in, softness of the formation, or restrictions reducing the actual WOB. The only true indication of the motor performance is the pressure gauge.

When the motor is off-bottom circulating the pressure gauge shows the total amount of pressure required to pump a known volume of fluid through the motor and bit. This is called the off-bottom pressure.

WOB (placing weight on the bit) creates a higher total pressure. The difference between the off-bottom pressure and the pressure when weight is applied to the bit is called the pressure differential.

Operate the motor at the recommended differential (the PSI difference between off-bottom pressure and on-bottom pressure). As weight is applied to the bit the pressure will increase. As the bit advances the pressure will decrease until more push (weight) is applied. For best performance and penetration rates maintain optimum on-bottom pressure.

When too much weight or push is applied, exceeding the maximum differential pressure, the motor will stall. The bit will cease to rotate causing the pressure gauge to rise abruptly. Stall pressure is about twice the recommended optimum differential pressure. When a stall happens, stop the pumps and reduce the WOB allowing the pressure to decrease to recommended operational pressures. Do not pull the motor off bottom until normal pressure is resumed. Continual stalling and operating motors in stalled condition can seriously damage the motor. Stalling can lead to tearing or “chunking” of the stator elastomer. When a stator is chunked, motor performance will dramatically decrease or the motor will possibly cease to function.

infographic on mud motors used in hdd services for oil and gas projects by horizontal technology inc located in texas america and edmonton alberta canada
Catalogues /PDFs

Download our latest Horizontal Technology Inc. catalogs, manuals, and brochures.

drill head and mud motor for horizontal technology inc a photo in black and white
Motor & Bit Catalog/Manual
viper rock reamer horizontal technology brochure
Viper Rock ReamerTM Catalog/Manual
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