The company is located in Changzhou high techIndustrial Development Zone, with the advantage be richly endowedby nature. It is east to Shanghai Wuxi, West Nanjing, North pillowYangtze River, has the lead in all directions of traffic advantage,the Beijing Shanghai High-speed Rail, Shanghai Nanjing Expresswaythrough the city, west of Changzhou airport, traffic is veryconvenientã    This is acompany for many years engaged in the special petroleum pipeproduction and sales, the main products of the company is API notthickened, and thick oil pipe coupling, API round thread, partialladder buckle special thread casing collar and a variety ofspecifications of the collar, the annual production capacity ofmore than 2800000, tubing and casing, drill rod and the drill pipejoint and so, with the pursuit of the cause and the courage tochallenge themselves and forever, my company's products have beenwidely exported to Canada, the United Arab Emirates, America,Singapore, Russia, Turkey, Venezuela and other countries andregions, in the domestic application in Changqing oil field,Yanchang oilfield, and has received the favor and praise of usersat home and abroad. We will work with you hand in hand together,create a better tomorrowã    Our aim is:people-oriented, scientific management, quality first, servicefirst, mutual benefit and win-win. Warmly welcome friends from allcircles to visit and give guidance, and seek commondevelopment.>Casing size:4-1/2"ï½13-3/8"; >Grade:H40ãJ55ãK55ãN80ãL80ãR95ãT95ãP110ãQ125;>Tubing size:1"9ï½4-1/2";   >Grade:H40ãJ55ãN80ãL80ãR95ãT95ãP110ãQ125;>Coupling for casing and tubingï¼1"9ï½20";>Grade:H40ãJ55ãN80ãL80ãR95ãT95ãP110ãQ125; Standard:API SPEC 5CT(9th)&API SPEC5B(15th)>Drillpipe:2-3/8ï½6-5/8;   >Grade:E75ãX95ãG105ãS135;>Tool joint:2-3/8"ï½6-5/8" Standard:API SPEC 5DP(1th); API SPEC 7Â