BL-2T is a multi-functional casing & tubing joint developed based on BL-1T, minimizing risks induced by combined loads of pressure, temperature, bending and compression.

Thread Design
Sizes & Thread Profiles:
Ø 2 3/8˝ ~ 2 7/8˝ – 8TPI
Ø 3 1/2˝ ~ 4 1/2˝ – 6TPI
Ø 5˝ ~ 7 3/4˝ – 5TPI
Ø 8 5/8˝ ~13 3/8˝ – 4TPI
Taper: 1:16

Key Advantages:

1. Excellent resistance to bending, compression and torque;
2. Stable gas sealing under various combined loads;
3. Easy operation and repair;
4. Proven long-term field service in oilfields.

Main Applications
Deep wells
Ultra-deep wells
High-pressure gas wells

Enhanced Metal-to-Metal Seal
The metal-to-metal sealing system delivers reliable gas tightness even under extreme combined loads encountered in deviated and long horizontal wells. It maintains sealing integrity after repeated make-up & break-out, and its seal geometry prevents wear.

Optimized Hook Thread Design

1. -3° hook-type load flank improves connection strength and compression resistance.
2. High structural strength against bending and compression makes it ideal for highly deviated and long horizontal wells.
3. Optimized thread profile minimizes wear risk even with minimal thread compound.

Negative-Angle Torque Shoulder

1. Reverse shoulder provides positive torque stop for accurate make-up, reducing circumferential stress. Its wedge effect delivers outstanding structural strength.
2. Optimized shoulder withstands severe service conditions including combined compression, external pressure, bending and torque.

Streamlined Bore Design
Pin bore chamfer, tight tolerance at coupling center and extended shoulders reduce turbulence and energy loss for high-speed gas flow across joints.

Coupling Design
It achieves 100% joint efficiency through vanish-thread coverage, long inner shoulder and coupling cross-sectional area greater than pipe body.