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    10/09

    2026

    Detailed Explanation of Drill Pipe End-Thicknessing Processes: IU, EU, and IEU Thickening Types and Quality Control

    Detailed Explanation of Drill Pipe End-Thicknessing Processes: IU, EU, and IEU Thickening Types and Quality Control

    The drill pipe body is a thin-walled seamless steel tube, while the connection section (tool joint) requires sufficient wall thickness to withstand tensile, torsional, and bending loads. To resolve the conflict between the “thin-walled pipe body” and the “thick-walled joint,” the drill pipe manufacturing process employs an upsetting operation—increasing the wall thickness at both ends of the pipe to create smoothly transitioned thickened sections.

    10/07

    2026

    Detailed Technical Overview of Kelly Bars: API 7-1 Standard and Selection Guide for Square and Hexagonal Types

    Detailed Technical Overview of Kelly Bars: API 7-1 Standard and Selection Guide for Square and Hexagonal Types

    The Kelly is the topmost driving component in conventional rotary‑table drilling. It passes through the rotary table’s bushing, transmitting the rotary torque from the table to the drill string below while supporting the entire weight of the drill string. Although top‑drive systems are becoming increasingly common on modern rigs, the Kelly remains widely used on workover rigs, small drilling units, and certain older rigs.

    10/05

    2026

    Well Drilling Rod Selection Guide: Matching Specifications, Materials, and Drilling Techniques

    Well Drilling Rod Selection Guide: Matching Specifications, Materials, and Drilling Techniques

    Water well drilling is a key application area for drill pipes, encompassing agricultural irrigation, industrial water supply, municipal potable water provision, and groundwater monitoring. Compared with oil and gas drilling, water well drilling is characterized by shallower depths, diverse geological formations, and cost sensitivity, which in turn impose distinct requirements on drill pipe selection criteria.

    10/02

    2026

    Detailed Explanation of Drill Pipe Friction Welding Technology: Joining Processes and Quality Control for Tubing Bodies and Tool Joints

    Detailed Explanation of Drill Pipe Friction Welding Technology: Joining Processes and Quality Control for Tubing Bodies and Tool Joints

    The connection between the drill pipe body and the tool joint is one of the most critical steps in drill pipe manufacturing. This joint—specifically, the weld zone—endures the same tensile, torsional, and fatigue loads as the pipe body; if it fails, the consequences are no different from a pipe‑body fracture. Friction welding is currently the industry’s predominant joining process.

    09/30

    2026

    How should drill pipe be selected for geothermal drilling? What are the technical requirements in high-temperature environments?

    How should drill pipe be selected for geothermal drilling? What are the technical requirements in high-temperature environments?

    Geothermal energy development is accelerating worldwide. Unlike conventional oil and gas drilling, geothermal wells confront three major challenges—high temperatures, hard rock formations, and corrosive fluids—placing unique demands on drill‑pipe selection. An incorrect choice can result in reduced service life and frequent replacements at best, or catastrophic failure under high‑temperature conditions and downhole breakage at worst.

    09/28

    2026

    Shale Gas Drilling Drill Pipe Procurement Guide: Selection of S135, V150, and DSTJ Grades for Horizontal Wells

    Shale Gas Drilling Drill Pipe Procurement Guide: Selection of S135, V150, and DSTJ Grades for Horizontal Wells

    Shale gas development primarily employs horizontal wells and extended-reach wells, with horizontal sections typically ranging from 1,500 to 3,000 meters, and in some cases exceeding 4,000 meters. This well configuration imposes significantly higher technical demands on drill pipes than conventional vertical wells—namely, high torque capacity, superior fatigue resistance, low friction, and extended service life.

    09/25

    2026

    Fundamentals of Drillstring Design: How to Determine Weight on Bit, Rotational Speed, and Drillstring Assembly?

    Fundamentals of Drillstring Design: How to Determine Weight on Bit, Rotational Speed, and Drillstring Assembly?

    Drillstring design is a core component of drilling engineering. A well‑designed drillstring assembly can efficiently transmit weight on bit and torque to the drill bit while ensuring safety, all while controlling vibration, minimizing wear, and extending tool life. Conversely, inadequate design may lead to drill‑tool failure, loss of control over the wellbore trajectory, reduced mechanical rate of penetration, and a host of other problems.

    09/23

    2026

    Detailed Explanation of Non-Magnetic Drill Collar Technology: Materials, Magnetic Properties, and MWD Applications

    Detailed Explanation of Non-Magnetic Drill Collar Technology: Materials, Magnetic Properties, and MWD Applications

    In directional drilling, MWD (Measurement While Drilling) and LWD (Logging While Drilling) tools rely on magnetometers to measure wellbore azimuth and toolface angle. If magnetic interference is present in the drill string assembly, the measurement data can become distorted, leading to deviations of the wellbore trajectory from the design. Non‑magnetic drill collars are specially designed drill collars intended to address this issue.

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    Longway Petroleum

    We can customize high-performance drill pipe assemblies of various sizes according to customer needs.

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