Slickline JU Pulling Tool

Description

JU Pulling Tool: Technical Description and Specifications

The JU Pulling Tool is an external-reach retrieval tool designed to engage and recover downhole equipment with external fish necks. While it shares the same robust latching profile as the JD series, the JU is specifically engineered as a shear-up-to-release tool. This configuration is essential for operations where downward jarring is required to set a device or where the wellbore conditions make upward release a safer alternative for the tool string.

Key Technical Specifications and Operation

• Function: To latch onto and retrieve tools with external fishing necks. It is the preferred choice for pulling devices that require downward force during installation or for fishing in environments where debris might prevent a “shear-down” tool from releasing.

• Mechanism: The tool utilizes spring-loaded dogs housed within a cylinder. As the JU tool is lowered over the target fish neck, the dogs expand to pass over the shoulder and then lock securely in place.

• Shear-Up Release: The defining feature of the JU is its safety release. If the fish cannot be recovered, a deliberate upward jarring action shears the internal pin. This moves the internal mandrel upward, allowing the dogs to expand and disengage from the external fish neck.

• Downward Jarring Strength: Because the release mechanism is triggered by upward force, the JU tool is ideal for operations where heavy downward jarring is needed (e.g., to set a plug or clear debris) without the risk of accidentally releasing the tool.

• Operational Strategy: The JU is often selected when there is a high probability of sand or debris settling below the tool, which would make the downward stroke of a JD tool impossible.

Customization and Materials

• Reach Variations: Like the JD series, the JU is available in three specific reach lengths to ensure compatibility with various external fish neck profiles:

  • JUC: Deep Reach

  • JUS: Shallow Reach

  • JUL: Long Reach

• Material: Manufactured from high-tensile alloy steel. NACE MR0175 versions are available for sour service to ensure the latching dogs and shear pins remain reliable in corrosive environments.

• Spring Rates: Internal springs can be customized to provide higher or lower latching tension depending on the weight of the BHA and wellbore fluid viscosity.

SEO Keywords (Targeted for Slickline Procurement)

• Primary: JU Pulling Tool, External Shear-Up Tool, Slickline JU Series, Wireline Retrieval Tool.

• Secondary: JUC Pulling Tool, Shear-Up External Puller, External Fish Neck Tool, Slickline BHA Pulling Equipment.

• Technical: Upward Shear Release Latch, Downward Jarring BHA Tool, Mechanical Pulling Sub.