Import Api 7-1 Mechanical Type Drilling Jar — Buy in wholesale FOB from Supplier in China

The Api 7-1 Mechanical Type Drilling Jar, specifically the Type BZ configuration, is a fully mechanical jarring and stuck-release tool engineered for demanding downhole conditions. It integrates both upward and downward jarring functions in a single body, allowing operators to free stuck drill string components from either tension or compression scenarios. The jarring force scope is adjustable across a broad operational band, configurable either at a maintenance station or directly at the well site to match specific downhole requirements. A flexible joint design reduces flexural stress on the jar body, extending operational life in high-torque environments. The tool complies with API 7-1 specification standards for drilling jar manufacturing and inspection.

Construction centres on alloy steel bodies with precision-machined mandrel and outer housing assemblies, hardened to resist galling and fatigue under cyclic loading. The mechanical trigger mechanism relies on spring-loaded detents and calibrated friction surfaces rather than hydraulic fluid, eliminating fluid degradation issues in high-temperature wells. Seal packages typically incorporate nitrile or fluoroelastomer compounds, rated for standard H2S service (typical). Internal splines and drive profiles transmit full drilling torque while permitting axial stroke during jarring sequences. Bore diameter and connection specifications follow API rotary-shouldered connection standards, with NC50 or similar premium threads typical for this class.

This drilling jar suits vertical, deep, directional and complex well trajectories where differential sticking or tight-hole conditions are anticipated. Primary buyers include drilling contractors, national oil companies and independent operators running conventional or rotary steerable assemblies in hard-rock or reactive shale formations. The adjustable force setting allows a single jar inventory to cover multiple well programmes, reducing capital equipment exposure. For procurement, confirm the exact connection specification, maximum operating temperature rating, and whether the flexible joint is included as standard or specified separately. Packaging is typically in wooden export crates with corrosion inhibitor; sea freight from Dongying port is standard.

Dongying Lake Petroleum Technology Co., Ltd is located on Huanghe Road in Dongying, Shandong Province, China, a region with established oilfield equipment manufacturing infrastructure. The supplier holds imported-tier status on the platform with harbour-level trust verification. The response rate is recorded at 0.00 percent with average response hours at zero, indicating no historical inquiry engagement through this channel. Buyers should initiate direct contact to assess current responsiveness and communication capability.

The company lists drilling jars, drill collars and related downhole tools, with the Type BZ mechanical drilling jar as a featured product. No verified factory audit, ISO certification status, or OEM partnership details are present in the source data. The supplier address and product focus suggest a manufacturing or trading operation serving domestic Chinese and export oilfield markets. Prospective buyers should request company registration documents, quality management system certificates, and reference installations before committing to volume orders.