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The knuckle Joint is an accessory of universal joint steel wire tool, which is used to bend the tool string.The Knuckle Joint, when incorporated into a wireline toolstring, provides flexibility in high-angle deviated wellbores.
Whenever Stem and jar are not aligned or not moving freely it is impossible to operate tools. However, adding knuckle joint in a string this situation can be avoided. Knuckle Joints are run immediately below mechanical jar. For additional flexibility additional knuckle joints can be included between stem and jar.
Size | Fishing neck | Connection |
1.25＂ | 1.187＂ | 15/16UN |
1.5＂ | 1.375＂ | 15/16UN |
1.875＂ | 1.75＂ | 1-1/16UN |
2.125＂ | 1.75＂ | 1-1/16UN |
2.5＂ | 2.313＂ | 1-1/16UN |
2.5＂ | 2.313＂ | 1-9/16UN |
Note: Special specifications can be provided according to customer requirements.
The Knuckle Joint incorporates several innovative features including an integral grease nipple to ensure internal components are continuously lubricated for a prolonged working and storage period. Critical internal components of the Knuckle Joint are also electro-less nickel-plated to further assist in prevention of internal corrosion which is common with standard knuckle joints.To provide flexibility in a wireline toolstring to assist conveyance in high-angle deviated wellbores
Matters needing attention
1. The universal joint is always connected below the jar.
2. When the universal joint is not used as a steering tool, it must be connected above the steering tool.
The knuckle Joint is an accessory of universal joint steel wire tool, which is used to bend the tool string.The Knuckle Joint, when incorporated into a wireline toolstring, provides flexibility in high-angle deviated wellbores.
Whenever Stem and jar are not aligned or not moving freely it is impossible to operate tools. However, adding knuckle joint in a string this situation can be avoided. Knuckle Joints are run immediately below mechanical jar. For additional flexibility additional knuckle joints can be included between stem and jar.
Size | Fishing neck | Connection |
1.25＂ | 1.187＂ | 15/16UN |
1.5＂ | 1.375＂ | 15/16UN |
1.875＂ | 1.75＂ | 1-1/16UN |
2.125＂ | 1.75＂ | 1-1/16UN |
2.5＂ | 2.313＂ | 1-1/16UN |
2.5＂ | 2.313＂ | 1-9/16UN |
Note: Special specifications can be provided according to customer requirements.
The Knuckle Joint incorporates several innovative features including an integral grease nipple to ensure internal components are continuously lubricated for a prolonged working and storage period. Critical internal components of the Knuckle Joint are also electro-less nickel-plated to further assist in prevention of internal corrosion which is common with standard knuckle joints.To provide flexibility in a wireline toolstring to assist conveyance in high-angle deviated wellbores
Matters needing attention
1. The universal joint is always connected below the jar.
2. When the universal joint is not used as a steering tool, it must be connected above the steering tool.
