Oil Country Tubular Goods (OCTG)

Oil country tubular goods (OCTG) is a family of seamless rolled products consisting of drill pipe, casing and tubing subjected to loading conditions according to their specific application. 

• Drill pipe is heavy seamless tube that rotates the drill bit and circulates drilling fluid. Pipe segments 30 ft (9m) long are coupled with tool joints. Drill pipe is simultaneously subjected to high torque by drilling, axial tension by its dead weight, and internal pressure by purging of drilling fluid. Additionally, alternating bending loads due to non-vertical or deflected drilling may be superimposed on these basic loading patterns. Drill pipe: Oil drilling pipes are made by geological drilling steel by hot rolling or cold drawing. Grade: E75, X95, G105, S135. Mainly used for oil and gas exploitation. 
  Drill Collars: Standard :API SPEC 7-1,Steel grade:AISI 4145H,Sizes:3 1/8″ — 11″,Connected Type:NC, IF, REG,Length:30 – 31 ft ± 6 ft.
  Type of design:（1）plain;（2） with a recess of the elevator; （3） with a recess of the elevator and power slips; （4） spiral and a wide range of type mixtures. Heavy Weight Drill Pipe:Standard:API 5DP, API SPEC 7-1，Grade:API 5DP Grade DZ50, E75, R780, X95, G105, S135
  Sizes:2 3/8”, 2 7/8”, 3 1/2” 4”, 4 1/2”, 5”, 5 1/2” up to 6 5/8” Range of Thickness: 6.5mm to 12.7mm, or cutomized，Connection threads:NC26, NC31, NC38, NC40, NC46, NC50, 5 1/2FH.6 5/8FH，Length:R1, R2, R3
• Casing pipe lines the borehole. It is subject to axial tension by its dead weight, internal pressure by fluid purging, and external pressure by surrounding rock formations. Casing is particularly exposed to axial tension and internal pressure by the pumped oil or gas emulsion.  Casing is a large-diameter pipe that serves as the structural retainer for the walls of oil and gas wells, or well bore.size:OD: 4 1/2’’ ~ 20’’ (114.3mm ~ 508mm)；WT: 0.205’’ ~ 0.635’’ (5.21mm ~ 16.13mm)；LENGTH: R1, R2, R3
• Tubing is pipe through which the oil or gas is transported from the wellbore. Tubing segments are generally around 30 ft [9 m] long with a threaded connection on each end. The tubing is a pipeline that transports crude oil and natural gas from the oil and gas layer to the surface after drilling is completed. It is used to withstand the pressure generated during the mining process.Used for the Transmission of Oil & Gas
• Slotted Pipe:Standard:API 5CT,Grade:API J55, API K55, API N80, API L80, API P110,Thickness:6.88mm – 11.51mm,Sorts:API casing,Length:≤15m (each),Outside Diameter:50~200mm,Slot Width:(0.10~4)mm ±0.03mm
  
  
  

   

• My company hot sale steel pipe and pipe fittings:

  ASTM A106 B seamless pipes,（1” to 24” sch40, sch80),

  API 5L GR.B steel pipes, (seamless pipe, LSAW pipe, SSAW pipes, 1” to 110” sch 40, sch80),

  Boiler tubes,( 20G. 12Cr1MoVG, ASTM A335 P5, P9, P11),

  ASTM A333 GR.6 seamless pipes, ( 1” to 24” sch40, sch80, sch160),

  TP304/304L, TP316/TP316L, stainless steel pipes, (1” to 48” sch10, sch20, sch40, sch80),

  API 5L X65, X70 PSL2 LSAW welded pipes, (20” to 60” sch40, sch80, sch160),

  API 5CT seamless casing, and tubing, (2 3/8” to 20” K55, J55, N80, L80, P110),

  Pipe fittings, elbow, reducer, ,tee,cap, flange