Import Drilling Jar — Buy in Bulk from Supplier in China

The ZSJ/ZXJ Drilling Jar offered by Tianhe Oil Group (Chengdu) is a hydraulic‑mechanical downhole stuck‑freeing tool designed for integration with a drill string. It comprises an up‑jar (ZSJ type) that operates via a hydraulic mechanism and a down‑jar (ZXJ type) that uses a mechanical‑friction mechanism. The up‑jar’s jarring force can be adjusted in the field but must not exceed the tool’s rated load, while the down‑jar’s force is pre‑set before deployment and cannot be readjusted after being placed downhole. This configuration makes the jar suitable for directional, complicated and deep‑well operations.

Typical drilling jars of this class are forged from high‑strength alloy steel that meets API 59 specifications, providing the hardness and toughness required for repeated impact loading. Standard heat‑treatment processes yield a Rockwell hardness of about 45 HRC, and the jars are machined to dimensional tolerances of ±0.2 mm on critical bore surfaces. The hydraulic circuit is designed for pressures up to 200 MPa, a range that aligns with most modern rotary‑steering rigs.

Oil‑field service contractors and drilling companies that face frequent downhole sticking problems commonly select this jar for its dual‑mode operation. It is especially valuable in directional and deep‑well projects where rapid jarring can minimise non‑productive time. The supplier lists the product without disclosed MOQ, price or lead time, so interested buyers should contact Tianhe Oil Group (Chengdu) directly to negotiate bulk trade terms and confirm shipping arrangements.

Tianhe Oil Group (Chengdu) operates from 2307a, Xiexin Center, No.25, Second Section, Fuqing Road in Chengdu, China. The company is listed under the harbour trust tier, with a recorded response rate of 0.00 and an average response time of 0 hours, indicating that enquiries may require follow‑up to obtain a reply.

The supplier’s catalogue includes the ZSJ/ZXJ Drilling Jar described above. No additional certifications, production capacity or client references are provided in the listing, so buyers should request any needed documentation directly from the supplier.