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在建筑鋼市場上，N80石油套管價格也是難改下行的態勢，不過跌勢較此前明顯趨緩。上海、杭州等此前噸價周跌幅逾百元的市場，目前跌幅普遍收窄至10至60元。商家的出貨意愿很強烈，無奈市場的需求持續低迷。經過較長時間的下跌，目前國內建筑鋼價已處于階段性的低位，價格進一步深跌的概率也不是很高。后期國內環保治理的力度估計會進一步加大，這對鋼鐵業的產出會有影響，N80石油套管的供給壓力或有望能夠緩解。In the construction steel market, N80 oil casing prices are also difficult to change the downward trend, but the decline was significantly slower than before. Markets such as Shanghai and Hangzhou, which had a weekly price drop of more than 100 yuan per week, have generally narrowed down to 10 to 60 yuan. The shipments of merchants are very strong, but the demand for the market continues to slump. After a long period of decline, the domestic construction steel price has been at a low stage, and the probability of further deep fall is not very high. In the latter stage, the domestic environmental protection will be further strengthened, which will affect the output of the steel industry, and the supply pressure of N80 oil casing may be expected to ease.

人民新聞網今日獲悉：河北滄州勝倉有限公司專業生產P110石油套管、J55石油套管、K55石油套管、L80石油套管、N80石油套管、地質管、水井套管的廠家.現面向全國銷售各種石油套管、地質管、水井套管.公司資源充足,品種齊全,庫存量大,價位特低,同時可定尺定做非標及先特殊鋼種的鋼材,可根據客戶的要求定做各種鋼材的設備,時間*快.價格以當日電詢為準.另公司備有等離子切割機、鋸床一臺,所有材料可切割銷售加工。Hebei Cangzhou Shengcang Co., Ltd. specializes in the production of P110 oil casing, J55 oil casing, K55 oil casing, L80 oil casing, N80 oil casing, geological pipe, well casing manufacturers. Large stock, low price, at the same time can be customized size of non-standard and first special steel products, can be customized according to customer requirements of various steel equipment, time * fast.

P110石油套管內部結構
   石油套管是一種大口徑管材，起到固定石油和天然氣油井壁或井孔的作用。套管是插入井孔里，用水泥固定，以防止井眼隔開巖層和井眼坍塌、并保證鉆探泥漿循環流動，以便于鉆探開采。每一口井根據不同的鉆井深度和地質情況，要使用幾層套管。套管下井后要采用水泥固井，它與油管、鉆桿不同，不可以重復使用，屬于消耗材料。所以，套管的消耗量占全部油井管的70%以上。套管按使用情況可分為：導管、表層套管、技術套管和油層套管The oil casing is a large diameter pipe, which acts as a fixed oil or gas well wall or well bore. Casing is inserted into the borehole and fixed with cement to prevent the borehole from separating the rock formation and wellbore collapse, and to ensure the circulation of drilling mud flow, so as to facilitate drilling and production. According to different drilling depth and geological conditions, each well should use several layers of casing. Cement cementing should be used after casing running. It is different from tubing and drill pipe and can not be reused. It is a consumable material. Therefore, the casing consumption accounts for more than 70% of the total oil well pipe. Casing can be divided into conduit, casing, casing and casing.

石油套管是石油鉆探用重要器材，其主要器材還包括鉆桿、巖心管和套管、鉆鋌及小口徑鉆進用鋼管等。國產套管以地質鉆探用鋼經熱軋或冷拔制成，鋼號用“地質”(DZ)表示，常用的套管鋼級有DZ40、DZ55、DZ753種。石油套管按SY/T6194-96規定，套管長度不定尺，其范圍8-13m。但不短于6m的套管可以提供，其數量不得超過20%。接箍外表面不得有折疊、發紋、離層、裂紋、軋折、結疤等缺陷。石油套管及接箍螺紋表面應光滑，不允許有毛刺、撕破及足以使螺紋中斷影響強度和緊密連接的其他缺陷。石油套管的內外表面不得有折疊、發紋、離層、裂紋、軋折和結疤。這些缺陷應完全掉，深度不得超過公稱壁厚的12.5%。Oil casing is an important equipment for oil drilling, and its main equipment includes drill pipe, core pipe and casing, drill collar and small diameter drilling pipe. Hot-rolled or cold-drawn steel casing made in China is used for geological drilling. The steel number is expressed by "geology" (DZ). The commonly used casing steel grades are DZ40, DZ55 and DZ753. According to SY/T6194-96 regulations, the casing length is not fixed, and its range is 8-13m. However, bushing not less than 6m can be supplied, and its quantity should not exceed 20%. The outer surface of the coupling shall not be folded, striped, separated, cracked, rolled, and scarred. The surface of casing and coupling threads shall be smooth and free from burrs, tearing and other defects sufficient to interrupt threads affecting strength and tight connection. The inside and outside surfaces of the oil casing must not be folded, striped, separated, cracked, rolled and scarred. These defects should be completely dropped, and the depth should not exceed 12.5% of the nominal wall thickness.

J55石油套管是石油鉆探用重要器材，其主要器材還包括鉆桿、巖心管和套管、鉆鋌及小口徑鉆進用鋼管等。國產套管以地質鉆探用鋼經熱軋或冷拔制成，鋼號用“地質”(DZ)表示，常用的套管鋼級有DZ40、DZ55、DZ753種。按SY/T6194-96“石油套管”分短螺紋套管及其接箍和長螺紋套管及其接箍兩種。主要用于石油井鉆探J55 oil casing is an important equipment for oil drilling. Its main equipment includes drill pipe, core pipe and casing, drill collar and small diameter drilling pipe. Hot-rolled or cold-drawn steel casing made in China is used for geological drilling. The steel number is expressed by "geology" (DZ). The commonly used casing steel grades are DZ40, DZ55 and DZ753. According to SY/T6194-96 "oil casing", there are two kinds of short threaded casing and its coupling, long threaded casing and its coupling. It is mainly used for drilling in oil wells.