Import Api Drilling Jar — Buy in wholesale FOB from Supplier in China

The API Drilling Jar is a downhole stuck-freeing tool operated as part of the drill string, designed for directional wells, complex formations, and deep drilling operations. It comprises two interchangeable modules: the ZSJ type up jar and the ZXJ type down jar, which can function together or independently. The up jar section employs a hydraulic mechanism where jarring force adjusts according to surface pull load, though not exceeding the tool's rated maximum. The down jar section uses a mechanical friction mechanism with preset force adjustment at surface before deployment, after which no downhole re-adjustment is possible.

The hydraulic up jar converts tensile strain into stored energy released as an upward impact, while the mechanical down jar delivers downward impulse through pre-loaded friction surfaces. Typical construction utilises alloy steel bodies with heat-treated components to withstand cyclic fatigue and corrosive drilling fluid environments. Standard material grades include AISI 4140H or equivalent modified alloy steel with yield strengths exceeding 110 ksi, though buyers should confirm the exact grade and hard-facing specifications with the supplier. The tool is manufactured to API specifications for drill string components, with connection threads typically NC50, 6-5/8 FH, or other API rotary shouldered connections to match existing drill string geometry.

Operators in directional and horizontal drilling programmes use this jar to free stuck pipe, drill collars, and bottom-hole assemblies without tripping the entire string. The dual-configuration flexibility allows drilling engineers to tailor jar placement based on anticipated sticking risk, whether from differential pressure, wellbore geometry, or formation characteristics. Buyers should verify the supplier's quality system certification, material traceability records, and whether inspection reports include magnetic particle testing and dimensional verification. Incoterms, delivery schedule, and packaging for ocean freight should be confirmed directly with Dongying Lake Petroleum Technology, as these are not stated in the listing.

Dongying Lake Petroleum Technology Co., Ltd. is located at 15 Floor, Huatai Center, Dongying City, Shandong Province, with postal code 257000. The company holds a Harbor trust tier on the platform, with a response rate of 0.00% and no recorded response time in hours. These signals indicate limited or no active engagement through platform messaging channels, so buyers should plan direct communication via the provided address or alternative contact methods.

The supplier operates from Dongying, a recognised cluster for oilfield equipment manufacturing in China. The listing presents technical content for the drilling jar without stating manufacturing certifications, quality management system accreditation, or specific client references. No information is provided about years in operation, annual output, workforce size, or export experience. Buyers should request documentation of API license status, ISO 9001 certification, and material certificates when engaging with this supplier.