Description
he Pipe Conveyed Logging While Fishing (PCLWF) system is an innovative contingency solution designed to complete wireline logging objectives when a toolstring becomes unexpectedly stuck in the wellbore. Installed on top of the logging toolstring before deployment, the system enables a rapid transformation from a stuck-wireline situation into a full pipe-conveyed logging operation. Unlike conventional logging-while-fishing methods, PCLWF does not require cutting the wireline cable at surface, preserving both equipment integrity and operational flexibility. The system uses a dedicated adapter tool with male and female wet connectors that can be safely separated under controlled tension. Once the cable and upper assembly are removed, the toolstring is recovered using drillpipe and a fishing overshot. Logging operations are then resumed through a standard PCL setup, allowing access to the entire open-hole interval without depth limitations. This approach significantly reduces operational time compared to traditional wireline fishing or LWF/R methods. It also improves safety by minimizing surface handling and cable cutting operations. The PCLWF system is particularly effective in long, deviated wells with large open-hole sections. Overall, it delivers substantial time, cost, and safety benefits in complex stuck-tool scenarios
Features
Maximum Operating Temperature : 500 °F
Maximum Operating Pressure : 30,000 psi
Type of fluids : All types, including salt-saturated up to 300 g/l
Sour atmosphere : Up to 10 % H2S
VTLC-8 Wet Connector : 8 conductors
Maximum OD @ Upper Assembly : 4.125 in
Overall Length : 8.33 ft
Release Selectable Tension Range : up to 14,000 lb.
Operational Tensile Strength :139,000 lb. (with a 2:1 safety factor)
Benefits
* Eliminates the need to cut the wireline cable, preserving cable integrity and reducing surface risks and equipment replacement costs.
* Allows completion of all logging objectives, providing unrestricted access to the entire open-hole interval, not just the vicinity of the stuck depth.
* Reduces overall operation time, enabling a faster transition from a stuck-tool situation to a full pipe-conveyed logging operation.
* Improves operational safety, by minimizing hazardous wireline fishing activities and reducing manual handling at surface.
* Delivers significant cost savings, particularly in long or deviated wells, by avoiding extended fishing operations and additional logging runs
