- EN
Key Features & Advantages:
High Torque Capacity & Smooth Power Transmission:
Optimized spherical geometry provides a large contact area, allowing for the transmission of exceptionally high rotational torque required for powerful drilling operations.
Excellent angular compensation ensures smooth, continuous, and vibration-dampened power flow even under substantial shaft misalignment, protecting connected components.
Extended Service Life with Superior Wear Resistance:
Critical Surface Enhancement: The spherical head and socket are often precision-coated or manufactured using Nickel-bonded Tungsten Carbide (e.g., YN6 / YN10 grades). This delivers unmatched abrasion and erosion resistance against drilling mud solids.
Robust Core Material: The joint body is forged from high-strength alloy steel, subjected to advanced heat treatment (e.g., quenching and tempering) to achieve an optimal balance of core toughness and surface hardness, preventing fatigue failure.
Dramatically reduces maintenance frequency and non-productive time caused by transmission component failure.
Optimized Hydraulic Design:
Features a streamlined profile and precision-machined internal flow channels to efficiently direct drilling fluid. This minimizes pressure drop and ensures adequate lubrication and cooling of the joint's articulation points.
Reliable Sealing & Lubrication Options:
Available with specialized sealing systems (e.g., elastomer seals or metal face seals) to effectively exclude abrasive drilling fluids and protect精密 internal surfaces.
Designed for use with high-temperature, high-pressure (HTHP) grease or configured with grease reservoirs for sustained lubrication under downhole conditions.
Precision Engineering & OEM Customization:
Full OEM Customization support. We tailor dimensions, torque ratings, thread connections (e.g., API standards), and angular specifications to integrate seamlessly into your specific downhole tool design.
Rigorous quality control throughout manufacturing, including non-destructive testing (NDT), dimensional accuracy verification, and dynamic balancing, ensures each joint meets the stringent demands of downhole applications.
Typical Technical Specifications:
Outside Diameter: Customizable per tool size (e.g., φ50mm - φ200mm and above).
Maximum Operating Angle: Typically up to 10° - 15° or higher.
Torque Capacity: From several thousand to tens of thousands of Newton-meters, depending on size and material.
Operating Temperature: Standard range -20°C to +150°C (higher grades available based on seal/lubricant selection).
Surface Treatment: Tungsten carbide coating on critical wear surfaces; chrome plating, phosphating, or specialized coatings on other areas for enhanced corrosion protection.
Primary Applications:
Positive Displacement Motors (PDM / Mud Motors): Core component connecting the drive shaft to the output shaft, transmitting bit torque.
Rotary Steerable Systems (RSS): Facilitates power transmission and angle compensation within the steering mechanism.
Downhole Drilling Agitators / Thruster Tools: Serves as the high-load articulation joint.
Other downhole mechanical tools requiring high-torque, high-angle power transmission.
| Model | Swivel OD | Water Cap OD | Effective Length | Male Thread | Female Thread | Remarks |
| LZ73 | 45 | 48 | 538 | M30×3 | M36×3 | One end water cap |
| LZ79 | 45 | 49 | 485 | M30×3 | M39×3 | One end water cap |
| LZ89 | 62 | 62 | 530 | M42×3 | M42×3 | One end water cap |
| LZ95(100) | 63 | 500 (650) | M42×4.5 | Double male thread | ||
| LZ95 | 67 | 73 | 782 | M45×4 | M42×3 | One end water cap |
| LZ120(127) | 83 | 535 (755) | 2 1/4-5 Special Taper | Double male thread | ||
| LZ120 | 85 | 600 | M50×3 | Double male thread | ||
| LZ120 | 85 | 85 | 821 | M56×4 | M62×5 | One end water cap |
| LZ135 | 95 | 665 | 2 3/8REG | Double male thread | ||
| LZ146 | 98 | 800 | 2 7/8REG | Double male thread | ||
| LZ150 | 100 | 800 | 2 7/8REG | Double male thread | ||
| LZ165 | 114 | 755 | 2 7/8IF (NC31) | Double male thread | ||
| LZ172 | 120 | 755 | 2 7/8IF (NC31) | Double male thread | ||
| LZ172 | 122 | 128 | 970 | 2 7/8IF (NC31) | M90×4 | One end water cap |
| LZ185 | 130 | 130 | 1039 | 2 7/8IF (NC31) | M95×4 | One end water cap |
| LZ197(203) | 140 | 775 | 3 1/2IF (NC38) | Double male thread | ||
| LZ216 | 153 | 165 | 1112 | 3 1/2IF (NC38) | M100×6 | One end water cap |
| LZ216 | 140 | 775 | 3 1/2IF (NC38) | Double male thread | ||
| LZ244 | 160 | 915 | 3 1/2IF (NC38) | Double male thread | ||
| LZ244 | 165 | 930 | 3 1/2IF (NC38) | Double male thread | ||
| LZ244 | 175 | 180 | 1057 | 4 1/2REG | T5.08-4 | One end water cap |
| LZ286 | 160 | 915 | 4 1/2IF (NC50) | Double male thread |
