Special Threads of Baosteel
BGT2
A special thread connector with coupling. It uses the cone-to-cone metal sealing form and meets the most demanding ISO 13679 CAL-IV test requirements. The stretching efficiency and compression efficiency of the connector have reached 10% of the yield strength of the pipe body, and the connector is applicable for different complicated well conditions, such as deep wells, high-pressure gas wells, high-temperature and high-pressure wells, and ultradeep, ultrahigh-pressure, and ultrahigh-temperature gas wells. Now, the specifications range from 2 3/8" to 13 3/8".
BGT1/BGC
A special thread connector with coupling. It uses the cylinder-to-cylinder metal sealing form and meets the requirements of high sealing pressure, applicable to drilling and development of deep wells, high-pressure gas wells, high-temperature and high-pressure wells, directional wells and horizontal wells. BGT1 tubings include products of different grades and different wall thicknesses, ranging from 2 3/8" to 4 1/2"; BGC casings include products of different grades and different wall thicknesses, including 5", 5 1/2", 7" and 9 5/8".
BG-PT/BG-PC
An economical tubing/casing with low inner pressure and lasting airtightness. Based on a complete engagement of thread flank to thread flank, it is airtight and applicable to drilling and development of wells with harsh conditions, such as deep wells, ultradeep wells, directional low-air-pressure wells and mixed oil and gas wells. Depending on needs, users may choose the connector form of BG-PTS/BG-PCS with torque shoulder. Its specifications range from 2 3/8" to 13 3/8".
BG-FJ/BG-XC
A thread connection form without coupling. The two ends of the pipe body are directly connected through inner and external threads. Mainly applicable to wells that require smooth pass of connectors, such as slim hole completion wells and gas wells with salt and gypsum layers. Besides, it can be used as a liner to increase the annulus space with the outer wall of the casing/tubing string to tubing/casing running as well as well cementing. Its specifications range from 3 1/2" to 13 3/8".
BHC
An improved buttress-thread casing with large taper and large thread pitch. With fast make-up speed, good stabbing performance and high connection strength, it performs excellently in different well conditions, especially in deviation holes. Its specifications cover 8 5/8" to 20".