Jar (Hydraulic/Mechanical)

Hydraulic & Mechanical Drilling Jar

A Drilling Jar is a downhole impact tool used in drilling, fishing, and well intervention operations to deliver powerful upward or downward blows to free stuck drill strings, bottom hole assemblies (BHAs), casing, tubing, or other downhole equipment. Drilling jars significantly reduce non-productive time (NPT) and help restore drilling operations without requiring costly sidetracking or well abandonment.

Hydraulic jars use hydraulic fluid to delay and amplify the impact force, while mechanical jars rely on stored mechanical energy released through tension or compression. Both are essential tools in oil and gas drilling operations.

Features

High-impact jarring force for freeing stuck pipe.

Suitable for vertical, directional, and horizontal wells.

Available in hydraulic, mechanical, and hydro-mechanical designs.

Heavy-duty alloy steel construction.

Precision-machined internal components.

Long service life with minimal maintenance.

Compatible with standard Bottom Hole Assemblies (BHAs).

Excellent performance in high-temperature and high-pressure wells.

Designed for repeated jarring operations.

Available with API standard connections.

Technical Specifications

Specification Details

Product Type Hydraulic & Mechanical Drilling Jar

Standard API Spec 7-1

Material AISI 4145H Modified Alloy Steel, 4140 Alloy Steel

Connection API Regular, IF, FH, NC Threads

Outside Diameter 3⅛" – 9½"

Inside Diameter Varies by size

Length 12 – 35 ft (Model Dependent)

Pressure Rating Up to 20,000 psi

Temperature Rating Up to 400°F (204°C)

Tensile Strength Up to 2,500,000 lbs

Torque Capacity Model dependent

Service Standard & Sour Service (NACE MR0175)

Types of Drilling Jars

Hydraulic Drilling Jar

Uses hydraulic oil and a timing mechanism to build energy before delivering a powerful impact. Ideal for controlled jarring operations in deep wells.

Mechanical Drilling Jar

Operates through mechanical spring or latch mechanisms. Provides immediate impact after reaching the required tension or compression.

Hydro-Mechanical Jar

Combines hydraulic timing with mechanical release for enhanced impact performance.

Fishing Jar

Designed specifically for fishing operations to recover lost or stuck equipment.

Tubing Jar

Used during tubing and workover operations.

Wireline Jar

Smaller jar used during wireline and slickline interventions.

Applications

Freeing stuck drill pipe.

Recovering stuck Bottom Hole Assemblies (BHAs).

Fishing operations.

Workover operations.

Well intervention.

Directional drilling.

Offshore drilling.

Onshore drilling.

Deepwater drilling.

HPHT drilling operations.

Extended reach drilling (ERD).

Compatible Equipment

Drill Collars

Drill Pipe

Heavy Weight Drill Pipe (HWDP)

Stabilizers

Fishing Tools

Overshots

Spear Tools

Shock Subs

Accelerators

Bottom Hole Assemblies (BHAs)

Reamers

Milling Tools

Advantages

Delivers powerful impact to free stuck pipe.

Reduces costly downtime.

Minimizes risk of abandoning the well.

Increases drilling efficiency.

Extends the service life of drilling tools.

Reduces fishing costs.

Improves operational safety.

Suitable for severe drilling conditions.

Reliable in high-pressure and high-temperature environments.

Low maintenance and high durability.

Available Sizes

3⅛"

3¾"

4¾"

5"

5¼"

6¼"

6½"

7¾"

8"

8¼"

9½"

(Custom sizes are available upon request.)

Industries Served

Oil & Gas Exploration

Offshore Drilling

Onshore Drilling

Geothermal Drilling

Directional Drilling

Well Intervention Services

Drilling Contractors

Energy Service Companies

Well Completion Operations

Hydraulic & Mechanical Drilling Jar Sales & Lease

We supply Hydraulic and Mechanical Drilling Jars for both sale and rental, supporting drilling, fishing, workover, and well intervention operations. Every tool is thoroughly inspected, function-tested, and certified before delivery to ensure dependable field performance and compliance with API standards.

Our Sales & Rental Services Include

New and refurbished drilling jars.

Short-term and long-term rental packages.

Hydraulic, mechanical, and hydro-mechanical models.

API inspection and certification.

Pressure and function testing.

Equipment mobilization and demobilization.

Technical support and tool selection.

Emergency equipment supply.

Preventive maintenance and refurbishment.

Nationwide and international delivery.

Our drilling jars are designed to provide maximum impact force, exceptional durability, and reliable performance, making them the preferred choice for operators seeking efficient solutions to stuck pipe and downhole recovery challenges in demanding drilling environments.