Buckle type	Specification range (mm)	Structural features	Typical use
HSM-2	60.32~339.72	Hook thread; optimized thread guide clearance and torque shoulder structure; reverse shoulder; cone metal/metal seal	Can be used for ultra-deep wells, large displacement wells, high temperature and high pressure gas wells and other complex conditions
HSM-2-HC	127.00~244.48	Hook thread; optimized thread guide clearance and torque shoulder structure; reverse shoulder; conical metal/metal seal; increased shoulder thickness	It can be used for ultra-deep wells, high temperature and high pressure gas wells, inclined horizontal wells, shale gas wells and complex working conditions such as string rotation.
HSG3	127.00-374.65	Optimized hook thread to increase the positive angle of the guide surface; combined seal structure design	Can be used for ultra-deep wells, high temperature and high pressure gas wells, as well as inclined wells, horizontal wells, large displacement wells and other complex well conditions
HSTS	60.32~114.30	Two-stage cylindrical thread; double shoulder design; metal/metal seal structure; internal and external thickening direct connection type	Can be used for deep wells, high pressure wells, horizontal wells, and other harsh service environment
HSFJ	73.02~298.45	Hook-shaped thread; the outer diameter of the joint is the same as the outer diameter of the pipe body; the inner and outer double conical surface sealing structure; the flat end direct connection type	It can be used in well conditions with special requirements for annular space gap and connection strength
HSG3-FJ	114.30~298.45	Optimized hook thread to increase the positive angle of the guide surface; External cone seal, internal combined seal structure, thick wall direct connection type	It can be used in complex well conditions such as salt rock formation, paste rock formation, inclined well, horizontal well, large displacement well and requirements for annular space gap.
HSQR	339.72~508.00	Large angle guide surface; large pitch; large taper; thread seal	It can be used for catheters, watch covers, technical covers, etc. that require fast fastening.
HSN	114.30~339.72	Adopt API eccentric ladder thread structure, can be interchanged with APIBC thread; thread seal; inner right angle shoulder; inner smooth design	Can be used for rotary liner cementing and well conditions that need to be interchanged with APIBC threads

HS Series Special Threaded Connectors