Slickline Tubular Jar

Description

Slickline Tubular Jar

Technical Description and Specifications

The Slickline Tubular Jar is a robust mechanical impact tool designed to deliver concentrated upward and downward jarring forces within a tool string. Unlike the open-link design of a Spang Jar, the Tubular Jar features a completely enclosed telescopic mechanism. This design prevents wellbore debris, sand, or scale from entering the sliding assembly, ensuring consistent performance in “dirty” well environments and reducing the risk of the jar becoming “sand-locked.”

Key Technical Specifications and Operation

• Function: To provide mechanical percussion (jarring) to actuate, set, or retrieve downhole tools. It utilizes the “hammer and anvil” principle within a protected housing to deliver high-impact energy.

• Design & Mechanism: The tool consists of an internal mandrel that slides within a precision-machined outer sleeve (tube). The impact occurs internally when the mandrel reaches the end of its travel (the stroke) and strikes the internal shoulders of the housing.

• Operational Environment: Ideally suited for wells with high sand production, scale, or heavy debris. Because the striking surfaces are protected by the outer tube, the jar maintains its full stroke and impact force where open-link jars might fail.

• Bi-Directional Impact: Engineered to provide powerful jarring in both directions. Upward jarring is used to pull or shear pins, while downward jarring is used to set plugs or drive tools through obstructions.

• Stroke Length (Customizable): Standard stroke lengths usually range from 20 to 30 inches. The length of the stroke determines the momentum the stem can gain before impact.

• Connection (Customizable):

  • Standard interfaces include proprietary slickline pin/box threads.

  • Custom order connections are available for proprietary quick-connect systems (e.g., QLS, HQC) to ensure BHA compatibility.

• Material (Customizable):

  • Body: High-tensile, heat-treated alloy steel designed to withstand thousands of high-impact cycles without fatigue.

  • Custom material options are available, including NACE MR0175 compliant alloys for sour service and specialized coatings for high-salinity brine environments.

• Critical Parameters (Customizable OD and Strength):

  • Internal Clearances: Can be customized with specialized seals or scrapers to further protect the internal sliding mechanism.

  • Impact Surface: Striking faces can be hardened or reinforced for high-load fishing applications. Clients must specify the required OD and preferred stroke length when placing a custom order.

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