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Offshore Operation Facilities by Menglan Duan, Huacan Fang

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3.21. Main Downhole Tools Used in Coiled Tubing Operations

The main downhole tools used in coiled tubing operations include the tubing connectors, the hydraulic release joint, the centralizer, the universal joint, the accelerator, the weighing rod, the jar, and the hydraulic pressure nozzle, among others. Here are a few of the special downhole tools.

3.21.1. The Tubing Connector

The tubing connector is the connector that connects the coiled tubing with different kinds of downhole tools, and its structure is shown in Figure 3-147. The architecture of the tubing connector, from top to bottom, is the end cap, the inner ring, the sealing ring, and the ontology. When the connector connects with the coiled tubing, first make a thread of the coiled tubing's ...

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