The following is a detailed introduction to the LZ89 down-hole motor
Bypass valve: It is composed of valve body, valve sleeve, valve core and spring. During the drilling operation, the bypass valve is in the bypass state, allowing the mud in the drill string to bypass the motor and enter the annulus; when the mud flow and pressure reach the standard setting value, the valve core moves down and closes the bypass valve hole. At this time, the mud flows through the motor and converts the pressure energy into mechanical energy.
Motor assembly: It is the core component of the drilling tool and consists of a stator and a rotor. The stator is made of a rubber bushing injected on the inner wall of the steel pipe, and its inner hole is a spiral with certain geometric parameters; the rotor is a screw with a hard layer. The rotor and the stator mesh with each other, and the lead difference between the two is used to form a spiral sealing chamber to complete the energy conversion.
Universal shaft: It is mostly a flexure shaft type, and its function is to convert the planetary motion of the motor into the fixed axis rotation of the transmission shaft, and transmit the torque and speed generated by the motor to the transmission shaft to the drill bit.
Drive shaft: Its function is to transmit the motor's rotational power to the drill bit, while bearing the axial and radial loads generated by the drilling pressure.
High directional accuracy: Down-hole motor can better control the wellbore trajectory, suitable for drilling special well types such as directional wells and horizontal wells, and can accurately change the wellbore direction according to the design requirements to improve the efficiency of oil and gas production.
Stable torque output: It can provide a relatively stable torque during the drilling process, which is conducive to the drill bit to efficiently break rocks, reduce the drill bit's bounce and vibration, and improve the drill bit's service life and drilling quality.
Adapt to a variety of formations: It has good adaptability to formations with different hardness and characteristics, and can play a good drilling performance regardless of soft or hard formations.
Oil and gas drilling: in the exploration and development of oil and gas, it is often used for the drilling of directional wells and horizontal wells, which can accurately control the wellbore trajectory and improve the oil and gas recovery rate.
Underground drilling in coal mines: It can be used for drilling gas extraction holes, water exploration holes, geological exploration holes, etc. in coal mines, providing guarantee for safe production in coal mines.
Geothermal resource development: In the drilling of geothermal wells, down-hole motor can efficiently break rocks, improve drilling efficiency, and reduce drilling costs.
Engineering geological survey: In engineering geological survey, it is used to drill various strata, obtain geological samples and data, and provide a basis for engineering design and construction.
Model | 5LZ89×7.0Ⅲ | 5LZ89×7.0-3.1 | 9LZ89×7.0Ⅲ | |
Bit Size | in | 4 1/2 – 6 | 4 1/2 – 6 | 4 1/2 – 6 |
OD | mm | 89 | 89 | 89 |
ABH | ° | 0-3 | 0-3 | 0-3 |
Lobe | 5:6 | 5:6 | 9:10 | |
Stages | 3 | 3.1 | 3 | |
Pressure | MPa | 2.4 | 2.5 | 2.4 |
Flow Rate | L/s | 3-6.5-10 | 3-5-7 | 4-8-12 |
Flow Per Revolution | L/r | 1.53 | 1 | 2 |
Bit Speed | rpm | 118-255-392 | 180-300-420 | 120-240-360 |
Torque | N·m | 730 | 480 | 960 |
Max.torque | N·m | 1095 | 720 | 1440 |
Output Power | kw | 10-30 | 7.2-24 | 15-45 |
Weight on Bit | KN | 20 | 20 | 20 |
Max. Weight on Bit | KN | 30 | 30 | 30 |
Connection | Top Female Thread REG | 2 3/8 | 2 3/8 | 2 3/8 |
Bottom Female Thread REG | 2 3/8 | 2 3/8 | 2 3/8 | |
Length | mm | 3430 | 3210 | 3125 |
Weight | kg | 127.4 | 120 | 95 |
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