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PKJ

Knuckle joints

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The Conducting Knuckle Joint is a versatile and durable ball joint that allows for limited movement (±10°) in the X and Y axis, perfect for adding flexibility to your toolstring. With a stainless steel coiled tube and metal seals, this joint provides a reliable monoconductor electrical connection via a pressure proof coil.

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The Conducting Knuckle Joint is a compact universal ball joint with a limited degree of movement. It is used to add flexibility to the toolstring. The Knuckle Joint allows ±10° movement in both the X and Y axis. Electrical connection is made through a stainless steel coiled tube with metal seals. The ball joints provide greater strength than previous types of knuckle joints. The upper and lower bodies of the tool pivot are around a ball and socket arrangement. The upper and lower bodies limit the articulation about each axis to approximately 10º. Articulation reduces slightly away from these axes. The monoconductor connection is passed through the knuckle joint via a pressure proof coil. The knuckle joint is thus virtually maintenance free as there are no exposed wires.

Application
• Used in situations where flexible toolstrings are required
• Offsets the CCL for improved collar logs
• Minimises the centralised weight in highly deviated or horizontal wells
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