亚洲国产另类久久久精品黑人-国产精品久久久久国产精品三级-中文字幕少妇久久免费-干出白浆视频在线观看-日本久久久久久久做爰片日本-激情综合色综合啪啪五月丁香搜索-少妇被爽到高潮喷水久久欧美精品-脱岳裙子从后面挺进去在线观看-无码国产精品一区二区免费虚拟vr

    Molong News: On Feb.3,2010, Upsetting Process of Drill Pipe Body patented by SIPO.

Over past years, Molong has been paid more attention to the R&D of New products and application for all the inventions of new products and process, among which are 4 patents and more than 10 new practical patents. Three practical patents were awarded by SIPO.

    This process illustrates a method of end upsetting of drill pipe body,which decides the body quality during the production of drill pipe body from the operation’s experience. Molong techinical center developed a new process from the current upsetting experience based on our running facility, i.e three-times heating and twice upsetting or four times heating and three-times upsetting, two of first two heating are done on two heating upsetting furnaces in sequence and exlusive of internal and external upsetting in the menwhile. This method avoids unstaibility due to transformation internationally and externationally, guaranteeing the smooth transition of internal cone and body from internal upsetted area to the body. Compared with onging process, under the condition of hydraulic upsetter, not only the production time is shortened and the production yield is raised, but also the internal smooth transition is achieved, prolonging antifatigue life and reducing the possibility of body implacement max.

    The invention was applied on July 18,2008 by Molong, noted by SIPO on July 25,2008 and patented by SIPO on Feb.3,2010,which add up the gap of new products of patents as a motivation role of R&D of new products.

    The applications and appovals not only become the important sign of new products and new technology but also provide the basis of being granted by the central government and province and local government.