api 5ct l80 13cr oil casing

api 5ct l80 13cr oil CASING 

API: Abbreviation of American Petroleum Institute in English and American Petroleum Institute in Chinese.
OCTG: abbreviation of OilCountry Tubular Goods in English, and special oil pipes in Chinese, including product oil casing, drill pipe, drill collar, coupling, short joint, etc.
TUBING: tubing used in oil wells for oil production, gas production, water injection and acid fracturing.
Casing: a pipe that is lowered into the drilled hole from the ground surface as a lining to prevent collapse of the borehole wall.
Drill pipe: Pipe used for drilling holes.
Pipeline pipe: pipe used to transport oil and gas.
Coupling: It is used to connect two cylinders with threaded pipes and internal threads.
API thread: pipe thread specified in API standard, including tubing round thread, casing short round thread, casing long round thread, casing eccentric trapezoidal thread, pipeline pipe thread, drilling tool joint thread, sucker rod thread, etc.
Special thread: Non API thread thread type with special sealing performance, connection performance and other performance.

Casing is a large-diameter pipe that serves as the structural retainer for the walls of oil and gas wells or wellbore.

It is inserted into a well bore and cemented in place to protect both subsurface formations and the wellbore from collapsing and to allow

drilling fluid to circulate and extraction to take place

FAQ

Q1:  How long is your delivery time?

       According to the quantity of per size.Generally it is with 7 days if the goods are in stock,or it is 15-20 days if the goods are not in stock.

Q2: Do you provide samples ? is it free or extra ?

      Yes, we could offer the sample for free charge but do not pay the cost of freight.

Q3: What is your terms of payment ?

      A: Payment<=1000USD, 100% in advance.

           Payment>=1000USD, 30% T/T in advance ,balance before shippment.

      B:100% L/C at sight.

      C:30% advance payment ,70% L/C at sight.