ZC-1 Premium Connection
Description:
Tubing main seal is a 30o angle taper metal to metal seal, which can provide excellent gas tightness even after repeated make-ups breakouts. The design virtually eliminates all risk of seal galling. Casing main seal is a low taper seal (10% taper on diameter) providing gas tightness under high-tension loads such as with heavy string weights.
Thread Parameters | Tubing | Casing |
2 3/8〞to 2 7/8〞 | 3 1/2〞to 4 1/2〞 | 5〞and above |
Taper | 1:16 |
Thread Pitch | 8 TPI | 6 TPI | 5 TPI |
Advantages:
· The connection with standard coupling can reach to the strength of pipe body.
· High seal reliability, it can provide a considerable internal pressure resistance with the pipe body.
· Anti galling design
· Minimum energy losing
ZC-2 Premium Connection
Description:
Tubing main seal is a taper metal to metal seal (50% taper on diameter), which can offer excellent gas tightness even under the most severe combined loads, as encountered in deviated or long horizontal wells applications. Sealing integrity remains constant despite repeated make-ups and break-outs and protects against galling. Casing main seal is a 20o angle taper metal to metal seal, which provides gas tightness under combined loads.
Thread Parameters | Tubing | Casing |
2 3/8〞to 2 7/8〞 | 3 1/2〞to 4 1/2〞 | 5〞to 7 5/8〞 | 8 5/8〞and above |
Taper | 1:16 |
Thread Pitch | 8 TPI | 6 TPI | 5 TPI | 4 TPI |
Advantages:
· Excellent against bending / compressive and torsion properties
· Reliable gas-tightness under any combination load
· Easy to use and maintenance
ZC-3 Premium Connection
Description:
It is integral connection threaded on plain-end pipe with the OD of the connection totally flush with the pope body. Sizes range from 2 3/8〞to 11 7/8〞for such clearance applications as tubing in small sizes, drilling liners and tie-backs in medium sizes, and contingency liner in larger casing diameters.
Thread Parameters | tubing | casing |
2 3/8〞to 4 1/2〞 | 5〞and above |
Taper | 1:16 | 1:10 |
Thread Pitch | 6TPI |
Advantages:
· Excellent gas-tight sealing
· With maximum clearance （100% plush with pipe body）
· Easy to use and maintenance
ZC-4 Premium Connection
Description:
The external and internal thread is machined directly in the pipe without coupling. Joint is used internal and external upset. Taper metal-to-metal internal pressure seal is rated at 100% of the pipe body. The 100% external pressure seal is created at the torque shoulder. ZC-4 has the external and internal sealing capability, which can reach same performance with pipe body.
Thread Parameters | Specification |
2 3/8〞to 4 1/2〞 |
Thread from | Cylindrical thread form |
Thread Pitch | 6TPI |
Advantages:
· Strongly anti galling performance, longer using life
· Excellent resistance to H2S stresses corrosion.
· Better sealing performance
· Quickly speed of making up
· The thread connection strength is same with pipe body.
· High anti torque strength, high anti bending and strongly anti compression abilities.
ZC-5 Premium Connection
Description:
Joint end is used internal and external upset. The internal and external thread is machined directly in the pipe without coupling. And the thread connection strength is same with pipe body.
It used double screw with no interference and multi torque shoulder, which provides excellent gas tightness and strongly anti galling performance. With 7.5°angle on the flank and 45°angle on the stab flank, there is no radial interference between the inner and outer thread. Taper metal-to-metal internal pressure seal is rated at 100% of the pipe body.
Thread Parameters | Specification |
2 3/8〞to 5〞 | 5 1/2〞to 7〞 |
Thread form | Cylindrical thread form |
Thread Pitch | 8 TPI | 4TPI |
Advantages:
· Strongly anti galling performance
· Excellent resistance to H2S stress corrosion
· With double seal capability in the external and internal
· High anti torque strength, high anti bending and strongly anti compression abilities
ZC-6 Premium Connection
Description:
The external and internal thread is machined directly in the pipe without coupling. Joint is used internal and external upset.Taper metal-to-metal internal pressure seal is rated at 100% of the pipe body. The 100% external pressure seal is created at the torque shoulder. ZC-6 has the external and internal sealing capability, which can reach same performance with pipe body.
Advantages:
· Strongly anti galling performance, longer using life
· Excellent resistance to H2S stresses corrosion.
· Better sealing performance
· The thread connection strength is same with pipe body.
· High anti torque strength, high anti bending and strongly anti compression abilities.
