BL-1T is a multi-functional casing & tubing thread joint that minimizes risks from combined loads of pressure, temperature, bending and compression.

Thread Design
Sizes & Thread Profiles
Size: 2 3/8″ — 13 3/8″

Thread Type & Taper
φ2 3/8"～φ2 7/8": 8TPI, 1:16
φ3 1/2"～φ4 1/2": 6TPI, 1:16
φ5"～φ13 3/8": 5TPI, 1:16

Modified Buttress Thread

1. Coupled connection with strength meeting or exceeding pipe body.
2. High joint efficiency and easy machining.
3. Clearance fit at thread crests greatly reduces galling risk and avoids thread compound accumulation. Simple thread geometry enables easy stabbing, prevents cross-threading and ensures fast make-up.

Metal-to-Metal Seal
Sealing Performance: Cone-on-cone primary seal plus reverse torque shoulder seal creates a multi-seal structure with high reliability. It delivers internal pressure resistance equivalent to the pipe body.

Reverse Torque Shoulder

1. Reverse shoulder provides positive torque stop for accurate make-up and reduces circumferential stress. Its wedge effect offers excellent structural strength.
2. Multi-load capacity: Reverse shoulder greatly improves resistance to compression, bending and over-torque.

Streamlined Bore Design

1. 15° bore chamfer and extended shoulders protect joints from damage during running completion tools.
2. Streamlined inner bore reduces turbulence and energy loss for gas & liquid flow.