Product Knowledge

OCTG API casing is a large-diameter steel pipe installed in the wellbore and permanently cemented in place. It is designed to withstand high external collapse pressure from formati

We are a professional supplier of OCTG casing and tubing products manufactured in full compliance with API 5CT standards. Our offering includes casing, tubing, couplings, and pup j

TP-G4 is Tianjin Pipe Factory's fourth-generation premium gas-tight connection, available in sizes from 5 in. to 14-3/8 in. It delivers full-rated tensile, compressive, internal pr

Premium Connection TP-BM is an API Buttress (BC)-based premium casing connection for 4-1/2" to 13-3/8" casing, available in standard TP-BM and torque shoulder TP-BM(S) versions. It

TP-JC Premium Connection is a proprietary zigzag-thread premium tubing connection designed as a cost-effective replacement for API EU tubing. It provides 100% joint efficiency, rel

TP-QR Premium Connection is TPCO’s dedicated premium thread connection for large-diameter surface casing, available in sizes from 13-3/8 in. to 24 in. Featuring a 3 T.P.I. coarse m

TP-FJ Premium Connection is a high-performance flush casing connection for medium and heavy-wall carbon steel and low-alloy steel casing, covering sizes from 5” to 10-3/4”. It uses

TP-G2 is a premium gas-tight connection designed for demanding oil and gas wells, qualified in accordance with ISO 13679:2019 CAL IV testing procedures. Its 4° reverse-angle hooked

API 5CT K55 casing pipe is a widely used low-to-medium strength OCTG grade for oil, gas, geothermal, and water well construction. Designed according to the latest API 5CT and API 5

API 5CT K55 and API 5CT N80 are two widely used OCTG casing grades, but they serve different well conditions. K55 is a medium-strength Group 1 casing grade mainly used in shallow t

Check buttress threads by measuring lead, taper, and height with specialized dial gauges and verifying the standoff using API-certified ring or plug gauges. Additionally, perform a

API threads are primarily categorized into Casing (STC, LTC, BTC), Tubing (EUE, NUE), and Rotary Shouldered Connections for drill pipe (NC, REG, FH). These standardized profiles en