Mud Motor Drilling165mm 5LZ165

Mud Motor Drilling Motor Model 5LZ165

 

165mm motors deliver substantial rotational force in hdd mud motor drilling, suit for big dill rigs with pullback force of 200 tons or above. Works better in complicated layer formation.

 

产品参数   Products Specification 5LZ165
钻头外径    Dia. of Bit	mm	213~251
	inch	8 3/4~9 7 /8
扣型(REG)            Thread（REG）		4 1/2 REG female  4 1/2 IF male
重量 毛/净(kg)        Weight  G/N（kg）		650/650
流速 (L/s)     Rate of Fow (L/s)		20~32
压差  (Mpa)      Diff. pressure (Mpa)		2.4
工作扭矩（N.m）Working torque (N.m)		3668
最大扭矩（N.m）Max.  torque (N.m)		6602
长度 （mm）            Length (mm)		6030
工作钻压 （KN）Working WOB (KN)		80
级数   Stage Number		3

Brief Introduction of Mud Motor Drilling

 

Mud motors are essential tools in trenchless construction, particularly in Horizontal Directional Drilling (HDD). They are used to rotate the drill bit at the end of the drill string, allowing us to bore underground without open excavation.

Rotating the Drill Bit (旋转钻头): The primary function of a mud motor is to power the drill bit rotation. Unlike rotary drilling where the entire drill string is rotated from the surface, in HDD with mud motors, only the drill bit rotates. This is crucial for directional control and efficiency.

Directional Drilling (定向钻进): Take a note here, mud motors are key for steering the drill bit along a planned path, so, it matters the most in HDD projecrts. By combining the mud motor with a slightly bent housing and directional drilling tools, operators can precisely control the drilling direction to go around obstacles and reach target locations underground.

Powered by Mud (泥浆驱动): As the name suggests, mud motors are powered by hydraulic energy from the drilling mud. High-pressure mud is pumped down the drill string and through the motor, causing internal components to move and generate rotation.

In simple terms: Mud motors are like underground drills powered by mud, helping us steer and dig tunnels for pipes and cables without digging up the whole surface.

 

Mud Motor Operation User Guide

 

1. Back reaming with motor is prohibited. Slurry is recommended as drilling fluid.

After completing each steering (or pilot drilling) section, be sure to remove the mud motor before proceeding with pullback operations. Pulling back with the motor attached can cause stress concentration, leading to motor fracture or damage.

The drilling fluid of choice is mud. Select a mud pump with a corresponding displacement and model to drive it (see attached diagram 2.). Insufficient pump discharge flow can cause the motor to fail to start, or for the motor to lock up during drilling, resulting in no penetration (advance). Unstable pump discharge flow can cause the motor to operate intermittently, starting and stopping.

Another possible reason for poor mud pump discharge is partial blockage caused by large, hard rock particles forming within the drill pipe and motor, or between the probe housing and the drill pipe. This intermittent blockage causes the mud to flow intermittently, leading to unstable rotation speed. In such cases, it is best to disassemble and inspect the motor, drill pipe, and probe housing, and to clear any internal debris until the mud flows smoothly.

2. Flow rate of pump should not be lower than 800L/M, or the motor cannot rotate, or lock up in drilling process.

 

Mud Motor (mm)	95	120	165	172
Flow rate of Mud pump (L/M)	≥600	≥800	≥1300	≥1300

Diagram 2. selection of mud pump for mud motor

 

3. Rotated the new or idle mud motor clockwise at least 2 rounds with a tong before it works with a pump.

In on-site operations, first use a pipe wrench(or a hydraulic tong) to rotate the spindle head clockwise for more than 2 turns before starting pump circulation.

 

4. After use, user should clean it internally. Rotate the drive axle to remove the residual fluid.

After using the motor, by any means, be sure to clean out internal debris with clean water. After detaching the motor, use a pipe wrench to rotate the drive shaft clockwise to purge any residual fluid from inside the motor. Otherwise, the motor may fail to start when used again.

5. Drive axle of this motor is open for lubrication, hence fluid leak is not an issue.

Due to the open structure of the mud motor’s drive shaft section, the design allows for mud to leak from the gap between the drive shaft and the bearing housing. This leaked mud serves to lubricate and cool the TC bearings in the drive shaft area, preventing bearing seizure caused by excessive friction heat. Generally, this mud leakage is a normal phenomenon (leakage should not exceed 6% of the mud motor’s normal operating flow rate).

 

Performance Characteristics (性能特点 – Typical for 165mm Size):

 

High Torque: 165mm motors deliver substantial rotational force. This aids in cutting through tough soil.
Adjustable Bend: Operators can modify the motor’s angle. This allows for directional drilling.
Durable Design: Manufacturers construct 165 motors to withstand harsh conditions. This ensures reliability in challenging environments.
Variable Speed: Users can control the rotation speed. This optimizes performance for different soil types.

Typical Advantages :

 

• Precision: They enable accurate steering. This is crucial for navigating complex paths.
• Efficiency: They can drill through various soil types. This saves time and resources.
• Versatility: They adapt to different trenchless methods. This makes them a valuable asset.

A Typical Configuration for 165mm Mud Motor

(drill bit, drill rod, sonde housing and drill rig)