Baosteel Research Documents BGT2C Connections in BG155V Casing Development for 10,000-Metre-Class Wells

A paper published in Drilling Engineering in 2024 documents the use of Baosteel BGT2C premium threads in the development of BG155V ultra-high-strength, high-toughness casing for 10,000-metre-class wells. The authors include researchers from Baosteel’s Research Institute. [1]

The manufacturing description identifies precision CNC thread machining as part of the casing production process and specifically names BGT2C as the connection used. This provides a published technical reference linking the connection to a demanding casing development programme. [1]

Developing the Material and Connection Together

The study addresses casing requirements associated with high-temperature and high-pressure conditions in exceptionally deep wells. It reports a yield strength exceeding 1,100 MPa for the batch-produced BG155V casing and examines its strength at different temperatures, toughness, and microstructure. [1]

These results relate to the casing material studied. They should be read alongside the separate connection requirements when evaluating a complete tubular product.

For customers researching BGT2C, the paper offers a concrete development reference: it identifies both the casing material and the thread used, rather than referring generally to “premium connections.”

From Casing Specifications to Matching Accessories

A project specifying BGT2C casing may also require custom pup joints, crossovers, or other threaded accessories. Their manufacture begins with a complete definition of the required component.

The connection designation, outside diameter, wall thickness or nominal weight, material grade, and drawing requirements all need to be established. For a crossover, both end connections must be specified, together with the component length and bore.

This becomes particularly relevant when the accessory combines different sizes, materials, or connection types. Reviewing the complete component helps the customer and manufacturer resolve machining questions before production and agree on the required inspection records.

Authorized BGT2C Machining Support from SWS

BGT2C is explicitly listed on SWS’s Baosteel authorization certificate. Within the applicable licence agreement, SWS supports pin and box thread machining for accessories and downhole supporting tools; the certificate excludes finished coupling manufacture.

We accept customer-supplied material and can evaluate complete component manufacturing against customer drawings. Our experience includes premium-thread machining and special-material processing, with material suitability and machining feasibility reviewed for each enquiry.

The minimum order quantity for premium-thread products is one piece. Customers with small-batch, custom, or urgent requirements can submit their specifications for review of material availability, inspection arrangements, quality documentation, and delivery options.

For BGT2C pup joints, crossovers, or custom threaded accessories, send SWS your drawings, material requirements, quantity, and required delivery date. We welcome the opportunity to review the details and discuss a suitable manufacturing solution.