Drilling of oil and gas wells and transportation of oil and gas, main products include:casing，tubing，drill pipe,drill collar, heavy weight drill pipe,slotted pipe, line pipe, coupling and pup joint.
(1)кожух 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
(2)тюбинг: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
(3)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.
(4)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.
(5)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
(6)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
(7)трубопровод:Out Diameter: 2 3/8″ – 4 1/2″ (60.3mm-114.30mm)； Wall Thickness: 0. 205″- 0.635″ ；Length: R1(4.88mtr-7.62mtr), R2(7.62mtr-10.36mtr), R3(10.36mtr or longer);grade:API5L,ASTM A106/A53