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Oil production equipment at drilling site

Home Products Drilling Tools Downhole Drilling ToolsDrilling Jar

Drilling Jar – Powerful Jarring & Efficient Stuck Pipe Release

The drilling jar is a downhole tool connected within the drill string, operating in sync with the drill string during drilling. It generates upward or downward jarring force through mechanical or hydraulic action to resolve stuck pipe incidents.

We offer two types of drilling jars: fully hydraulic and hydraulic-mechanical.

Its key components are manufactured from high-performance premium alloy steel, while the internal energy storage mechanism utilizes high-quality imported copper alloy material, offering excellent wear resistance and deformation resistance. Our products are developed by integrating the strengths of internationally renowned brands, delivering safe, stable, and durable overall performance.

Type

Fully Hydraulic Drilling Jar
Hydraulic-Mechanical Drilling Jar

Fully Hydraulic Drilling Jar

The fully hydraulic drilling jar is developed by incorporating the structural advantages of Wenzel and Weatherford jars, resulting in a robust and reliable fully hydraulic drilling jar. Its key components are manufactured from high-performance premium alloy steel, and the internal energy storage mechanism utilizes high-quality imported copper alloy material for superior wear and deformation resistance. The unique seal is sourced from linternationally renowned manufacturers, guaranteeing reliable quality. This significantly enhances the tool's overall safety, stability, and durability.

It features adjustable jarring force and a hydraulic delay release function, offering simple operation, excellent reliability, and broad adaptability. It can be used in conventional wells, directional wells, and extended reach wells at operating temperatures of 160 °C to 200 °C. Multiple jarring operations can effectively free stuck tools or obstructions and quickly restore normal drilling operations.

Fully hydraulic drilling jar on a white background

Hydraulic-Mechanical Drilling Jar

The hydraulic-mechanical drilling jar is an integrated up-and-down jarring tool that combines the advantages of both mechanical and hydraulic drilling jars, making it suitable for a wide range of drilling operations. This type of drilling jar incorporates the proven design features of Wenzel jar, utilizing hydraulic action for upward jarring and mechanical action for downward jarring, and it includes a locking mechanism to effectively prevent accidental jarring. Multiple jarring operations can be performed to free stuck pipe or obstructions, and quickly restore normal drilling operations.

The hydraulic energy storage mechanism utilizes premium imported copper alloy material for superior wear resistance and deformation prevention. The mechanical locking mechanism is manufactured using a specialized process to achieve low friction, stable linear locking force, and safe, reliable operation. The seal is sourced from internationally renowned suppliers, guaranteeing reliable quality. Together, these features enhance the overall safety, stability, and durability of the tool. It can be used in conventional wells, directional wells, and extended reach wells at operating temperatures ranging from 160 °C to 200 °C.

Hydraulic-mechanical drilling jar on a white background

Advantages

01

Our drilling jar delivers up to 1 million lbf of impact while protecting the drill string and surface equipment from shock.

02

Our drilling jar is suitable for every drilling environment on land or offshore, in vertical or deviated wells, and in ultra-deep or ultra-hot boreholes.

03

Our drilling jar may be run in compression or tension, the jar makes up, racks, and handles like a standard-length drill pipe, reducing trip time.

04

Certified by authoritative bodies, including API and ISO, ensuring compliance with international standards and meeting operational requirements.

Specifications

Number of impacts: Greater than 500
Dynamic differential pressure: 110 MPa
Operating conditions: Suitable for all types of mud systems, including oil-based mud with oil content up to 90%
Pressure drop: ≤ 0.3 MPa
Inner diameter (mm): 121/165/203
Operating temperature: 160 °C or 200 °C
Static differential pressure: 140 MPa
Resistance: H₂S Resistant
Connection thread: Compliant with API Standards
Outer diameter (mm): 51/57.2/71.4

Applications

Primarily used in deep wells (over 7,000 meters), directional wells, and offshore drilling operations. It is pre-installed between the drill collar and the drill pipe to provide on-demand jarring capability during drilling.
In directional drilling operations, it is installed in the bottom hole assembly (BHA) as follows: drill collar (bottom) + one or two flexible shaft stabilizers + drilling jar (third joint above the neutral point) + heavy weight drill pipe.
For offshore drilling applications, fully mechanical designs are preferred to mitigate the risk of hydraulic system corrosion caused by seawater.

Download

Please download our PDF files for more detailed product specifications and dimensions.

Downhole Drilling Tools