US client visits GNEE to purchase P110 casing pipe with special drift

Recently, GNEE hosted a technical procurement delegation from the United States oilfield services sector for a project discussion regarding the supply of API 5CT P110 casing pipe with special drift requirements for a deep gas well development program.

The client is currently working on a deep and high-pressure gas well project, where casing integrity and completion tool compatibility are critical to drilling and completion performance. The project requires 13 3/8" and 9 5/8" P110 casing strings with customized special drift specifications, ensuring that downhole completion tools can pass through the casing string without interference.

Technical Discussion on Special Drift Requirements

During the technical meeting, both parties reviewed the well design, casing program, and completion tool specifications in detail. The client confirmed that standard API 5CT drift values are not sufficient for their completion design due to the use of large OD downhole tools, including:

• High-performance hydraulic packers
• Multistage hydraulic fracturing tools
• Logging-while-drilling (LWD) and measurement-while-drilling (MWD) assemblies
• Sand control and completion screen systems

GNEE’s engineering team provided a special drift feasibility evaluation, recommending customized drift mandrel dimensions based on tool outer diameter, safety clearance requirements, and coupling internal diameter limitations. The discussion also covered drift verification across both the pipe body and threaded connections (BTC and premium connections) to ensure full-string compatibility.

Confirmed Material and Technical Requirements

The preliminary technical requirements discussed include:

• API 5CT P110 grade casing (quenched and tempered full-length heat treatment)
• PSL2 inspection level for enhanced quality control and traceability
• Seamless manufacturing process for high-pressure resistance performance
• R3 long joint configuration for deep well running efficiency
• Special drift verification report included in the Mill Test Certificate (MTC)

The client emphasized strict requirements for dimensional stability under HPHT conditions, particularly regarding internal diameter consistency, ovality control, and surface quality.

GNEE Manufacturing and Quality Control Capability Overview

GNEE presented its OCTG manufacturing and inspection capabilities, including:

• API 5CT certified production system
• Ultrasonic and electromagnetic non-destructive testing (NDT)
• Full-length hydrostatic testing for pressure integrity verification
• Thread inspection and gauging in compliance with API 5B
• Standard and customized drift testing procedures
• Third-party inspection support (SGS, BV, DNV) upon request

The engineering team also explained how special drift requirements are integrated into the production workflow before final inspection and shipment, ensuring compliance with project-specific clearance specifications.

Project Outcome and Next Steps

After technical alignment, the US client expressed strong interest in proceeding with a trial order for field validation in the next drilling phase. Both parties agreed to:

• Finalize special drift specifications based on updated completion tool drawings
• Confirm casing program for 13 3/8" and 9 5/8" sections
• Prepare formal RFQ and technical documentation for production scheduling

This cooperation is expected to support the client’s upcoming deep gas well development program, where reliable casing performance and safe completion tool passage are key engineering requirements.

About GNEE

GNEE is a professional supplier of API 5CT casing and tubing, specializing in high-strength OCTG products for deep wells, HPHT applications, and customized engineering requirements. The company provides technical support covering material selection, manufacturing, inspection, and international delivery services.