Tianjin Shiruida Machinery Import & Export ... is a China PDM DRILLING TOOLS&＃039;S MANUFACTURE LTD &＃039;s export arm and also theleading supplier who is specialized in marketing all sizes of OCTG. Business Field:drill pipes, integral heavy weight drill pipes, drill collars, non-magnetic drill collars, spiral drill collars, Casing &tubing, Pipe lines; OCTG. Capacity of the mill: The mill has established 35000 square meter workshop, equipped with 180 sets of all kinds of equipments and 500 staff, in total 300 million investment. By now the production volume has been up to120000 joints of drill pipes and 10000 joints of drill collars each year. Cetificates: API SPEC 5D, API SPEC 7, API 5CT, API 5L, API SPEC Q1, ISO 9001:2000, ISO/ TS 29001. Welcome to visit our mill and make further inspection, if you are searching for a stable & credible supplier. contact us via: alex AT *****</p>