BTC STC LTC Thread Coupling according to API 5CT & 5B
API 5CT 9th Casing Coupling
Raw Material: API 5CT Seamless Steel Pipe
Usage: Well Drilling Machinery
Steel Grade: J55, K55, N80-1, N80-Q, L80-1, P110;
Size:4-1/2"-20"
Type: LTC, BTC, STC
Surface Treatment: Whole phosphating, or inside phosphating and outside coating
Packing: By carton, wooden case, wooden pallet, or by requirements of customers
Shape: Tubular
Brand: KW
Color: white on surface and black inside thread
Supply Ability: 20000pcs per month
All the detailed specification of casing couplings covering size 4-1/2"-20", grade K55, J55, P110, N80Q, L80-1, type of buttress thread, long round thread, short round thread as follow for your reference,
The APIcouplings for Casing Size and Specifications | ||||
Type of Thread | Weight | |||
Casing Coupling | 4-1/2" | STC | 127.00*158.75 | 5.23 |
4-1/2" | LTC | 127.00*177.80 | 4.15 | |
4-1/2" | BTC | 127.00*225.42 | 4.55 | |
5" | STC | 141.30*165.10 | 4.66 | |
5" | LTC | 141.30*196.85 | 5.75 | |
5" | BTC | 141.30*231.78 | 5.85 | |
5-1/2" | STC | 153.67*171.45 | 5.23 | |
5-1/2" | LTC | 153.67*203.20 | 6.42 | |
5-1/2" | BTC | 153.67*234.95 | 6.36 | |
6-5/8" | STC | 187.71*184.15 | 9.12 | |
6-5/8" | LTC | 187.71*222.25 | 11.34 | |
6-5/8" | BTC | 187.71*244.48 | 11.01 | |
7" | STC | 194.46*184.15 | 8.39 | |
7" | LTC | 10.83 | ||
7" | BTC | 194.46*254.00 | 10.54 | |
7-5/8" | STC | 215.90*190.50 | 12.30 | |
7-5/8" | LTC | 215.90*234.95 | 15.63 | |
7-5/8" | BTC | 215.90*263.52 | 15.82 | |
8-5/8" | STC | 244.48*196.85 | 16.23 | |
8-5/8" | LTC | 244.48*254.00 | 21.67 | |
8-5/8" | BTC | 244.48*269.88 | 20.86 | |
9-5/8" | STC | 269.88*196.85 | 18.03 | |
9-5/8" | LTC | 269.88*266.70 | 25.45 | |
9-5/8" | BTC | 269.88*269.88 | 23.16 | |
10-3/4" | STC | 298.45*203.20 | 20.78 | |
10-3/4" | BTC | 298.45*269.88 | 25.74 | |
11-3/4' | STC | 323.85*203.20 | 22.64 | |
11-3/4' | BTC | 323.85*269.88 | 28.03 | |
13-3/8" | STC | 365.12*203.20 | 25.66 | |
13-3/8" | BTC | 365.12*269.88 | 31.77 | |
16" | STC | 431.80*228.6 | 34.91 | |
16" | BTC | 431.80*269.88 | 40.28 | |
18-5/8" | STC | 508.00*228.60 | 51.01 | |
18-5/8" | BTC | 508.00*269.88 | 62.68 | |
20" | STC | 533.40*228.6 | 43.42 | |
20" | LTC | 533.4*292.10 | 57.04 | |
20" | BTC | 533.40*269.88 | 50.10 | |
More technical parameters for coupling for your reference; 
A well-established Quality System from Materials receipt to Products delivery ensures consistent quality at all levels of the activity. QMS Procedures & Measurements are tailored to establish high standards of Quality Assurance in the Operations. The Company maintains the 100% Traceability records as per API requirements&NACE MR 0175-2002 Standards and complies with all the legal, statutory and regulatory requirements.
About Kingwell
Xi'an Kingwell Oilfield Machinery Co.,Ltd is a professional supplier for oilfield products according to the API standard. We exporting ALL KINDS OF OILFIELD MACHINERY AND TOOLS with super Quality and Competitive Price in CHINA.
With over 10 years developing, we were developed from the beginning drilling service to manufacture factory who produce OCTG, DST tools and Solid Control products.
KINGWELL have experienced team, stronger enough to meet any challenge, we do believe honest is the base of business and cooperation, our aim is to build solid relationship with any part of honest. kingwell can provide highly efficient services to its clients resulting in accurate and timely deliveries at the best prices.
is a professional supplier for oilfield products according to the API standard. We exporting ALL KINDS OF OILFIELD MACHINERY AND TOOLS with super Quality and Competitive Price in CHINA.
Now, our tubing and casing couplings have exported to USA, Canada, Egypt, India and UEA , etc with 40 FCL contaniers per month.With high quality and short supply and good service, our couplings has got good reputation home and abroad Here we got some prise as follows. 
Our Tubing Couplings cover all API Standard scope from 2-3/8"-4-1/2" with strickly inspection, which all the goods should be checked one by one before packing. 
Our standard export packaing is suitalble multimodal transportationby three kinds of packages: wooden pallets and irony pallet and box as bellow,
Any suggestions to improve the packages will be higly appreciated! 
Kindly let me know if you have any interest or enquiry about ourproducts. You are also always welcomed to come to our factory for a visit at your convinent time.
We will offer you a good price and show you our best service.
NOTE:
We have stock of 16"BC K55 with high quality and dood service, please feel free contact me if you are interested in it!
