J-Lock Wireline Wet Connection for Rotating HDD Drill Strings
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Solution Overview
Problem
Conventional wireline connections in horizontal directional drilling (HDD) are prone to mechanical and electrical failures due to twisting, splicing issues, and exposure to drilling fluid, leading to costly rig-time losses and inefficiencies.
Innovation Solution
A releasable and reusable J-lock connection system using a mono-conductor braided wireline with a coaxial insulation layer and metal armor, allowing swiveling and rapid connection/disconnection through J-shaped latching features, ensuring electrical isolation and mechanical robustness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional wireline connections are used in HDD, then the wireline can be routed through the drill string, but the connections are prone to mechanical and electrical failures due to twisting and splicing issues
Solution Approach 1:
The wireline system is divided into modular segments with standardized connectors that can be quickly assembled and disassembled. Each connector is a self-contained unit with male and female mating parts, eliminating the need for complex splicing operations while maintaining connection reliability in harsh drilling environments.
Solution Approach 2:
The wireline connectors are pre-assembled and pre-tested before being deployed to the drilling site. This preliminary preparation ensures that connections are ready for immediate installation, reducing on-site assembly complexity and minimizing the risk of mechanical and electrical failures during drilling operations.
2Adaptability or versatility
If wireline connections are made frequently during drilling, then the wireline can adapt to drill string changes, but assembly and disassembly time increases
Solution Approach 1:
The connector design incorporates dynamic latching mechanisms that enable rapid engagement and disengagement. The male and female connectors feature self-aligning geometries and spring-loaded locking elements that automatically secure the connection within seconds, allowing frequent reconfiguration without significant time loss while maintaining full adaptability to drill string changes.
3Ease of operation
If plastic insulated copper wire is used, then the wireline is flexible and easy to install, but it spontaneously breaks and shorts out during drilling
Solution Approach 1:
The wireline employs a composite construction combining copper conductors with robust plastic insulation and protective metal armor. This composite structure maintains the flexibility and ease of installation of plastic-insulated wire while adding mechanical strength and environmental resistance to prevent spontaneous breaking and shorting during drilling operations.
4Use of energy by moving object
If the wireline is routed through rotating drill string, then power and signals can be transmitted, but the wire becomes twisted and entangled
Solution Approach 1:
The wireline is encased in a flexible protective sheath that allows it to withstand rotation and twisting forces without becoming entangled. This flexible shell maintains the wireline's electrical functionality for power and signal transmission while preserving its structural integrity and configuration stability during rotation through the drill string.
Data Source
AI summary
A releasable and re-seat-able locking electrical wireline wet connection associated with sections of wireline used in an HDD drill string in a borehole. Said connection comprising a male member on one end of the wireline section having an externally exposed electrical contact receptacle that connects to a subsequent wireline section by mating and locking on to the female member. Mating is achieved by a simple “J”-shaped set of latching features, a second axis having a conductive part extending into a hollow body whereby the electrical contact element is fastened to the wireline coaxial center conductor for electrical continuity and with the wireline's protective armor also physically secured inside the hollow body for extreme mechanical and electrical integrity during the HDD drilling process. Reliable electrical connections are established and maintained notwithstanding wet and contaminated contacts and continuous rotation and wireline tension.