<ul id="wcqya"></ul>
<strike id="wcqya"></strike>
  • <strike id="wcqya"></strike>
    Current Location: Home>>News>>Company News

    News

    Contact Us

    Yancheng Chongda Petrochemical Machinery Co., Ltd

    General Manager: 13770027868

    Manager Xu: 18921851996

    Phone: 0515-86570558

    Email: yccd@m.lvkeang.com

    Add: No. 99 Dacui Road, Lugou Town, Jianhu County, Jiangsu Province

    No. 88 Zhengda East Road, Lugou Town, Jianhu County, Jiangsu Province

    Web: www.m.lvkeang.com


    Structure and usage method of spray preventer products

    2024/08/18
    87

    Blowout preventer is used to close the wellhead during oil testing, well repair, completion and other operations to prevent blowout accidents. It combines the functions of full sealing and semi sealing, and has the characteristics of simple structure, easy operation, and high pressure resistance. It is a commonly used safety sealing wellhead device in oil fields to prevent blowout.

    Blowout preventer is the most important well control device, which plays a crucial role in drilling, especially in the process of underbalanced drilling. The purpose of designing a blowout preventer is to close the wellbore under pressure, maintain continuous control of the well, and circulate the formation fluid entering the well.

    The main structure of the blowout preventer

    Hydraulic blowout preventers mainly come in two forms: gate blowout preventers and annular blowout preventers. The gate blowout preventer is mainly composed of a housing, side doors, oil cylinders, cylinder heads, pistons, piston rods, locking shafts, seals, gate plates, etc. Its working process is to use hydraulic pressure to push the piston, drive the gate to close or open, thereby closing or opening the wellhead, achieving the purpose of sealing and opening the well.

    The gate of the gate blowout preventer can be divided into four types: fully sealed, semi sealed, variable diameter, and shear gate. It is used to achieve different conditions of well sealing. The semi sealed gate can seal the corresponding drilling rods and oil pipes, and if necessary, it can also suspend drilling tools. When there are no pipes in the well, the fully sealed gate can fully seal the wellhead. In special circumstances, the shear gate can cut off the drilling tools.

    In addition, the flange outlet on the side of the shell can be used for drilling fluid circulation and throttling well killing operations.

    The types of annular blowout preventers can be divided into conical annular blowout preventers and spherical annular blowout preventers according to the shape of their sealing rubber cores. Their structure mainly consists of four major parts: shell, top cover, rubber core, and piston. When there are drilling tools, tubing or casing in the well, the annular blowout preventer can use a rubber core to seal various sizes of annular spaces. When there are no drilling tools in the well, it can fully seal the wellhead during drilling, coring, logging and other operations. It can also seal the annular space formed by square drill rods, coring tools, cables and steel wires and the wellbore. With the use of pressure reducing and regulating valves, the drilling tools can be forcibly lifted out through the drill rods.

    Two types of annular blowout preventers have similar working principles. When a well surge is detected and the well needs to be sealed, high-pressure oil from the control system enters the lower closing chamber of the piston through the lower oil port, pushing the piston upward. The spherical rubber core moves upward along the spherical surface, while the conical rubber core moves towards the center under the restriction of the top cover and the compression of the inner cone surface of the piston, tightening and embracing the drilling tool, achieving sealing of the drilling tool or fully sealing the wellhead. When the well is opened, the piston descends and the rubber core returns to its original position under its elastic force, opening the wellhead.



    Prev:First
    ?
    Contact Us
    Sales Hotline:137-7002-7868
  • Mail:

    yccd@m.lvkeang.com

  • Web:

    www.m.lvkeang.com

  • Add:

    No. 99 Dacui Road, Lugou Town, Jianhu County, Jiangsu Province / No. 88 Zhengda East Road, Lugou Town

  • WeChat

  • WeChat

  • 91精品国产高清久久久久久国产嫩草| 亚洲精品国产va在线观看蜜芽| 精品无码一级毛片免费视频观看 | 精品国产乱码久久久久久1区2区 | 亚洲日韩国产精品第一页一区| 欧洲精品无码成人久久久| 久久精品国产亚洲沈樵| 亚洲精品国产啊女成拍色拍| 国产精品人人做人人爽人人添| 国产精品va一级二级三级| 国产精品igao视频网网址| 55夜色66夜色国产精品视频| 一夲道无码人妻精品一区二区| 日本精品啪啪一区二区三区| 2021国产精品自拍| 亚洲精品乱码久久久久久自慰| 国产乱子伦精品免费女| 精品日产一区二区三区手机| 精品一区精品二区| 老司机午夜精品视频资源| 久久久久这里只有精品| 精品一区二区三区四区电影| 亚洲精品无码久久久久牙蜜区| 久久精品人人做人人爽97| 亚洲午夜福利精品久久| 蜜臀91精品国产免费观看 | 亚洲午夜久久久精品影院| 日韩精品无码人妻免费视频| 久久精品国产99久久久古代| 久久精品免视看国产陈冠希| 国产一在线精品一区在线观看| 精品福利一区3d动漫| 国产成人精品久久亚洲高清不卡| 一本久久a久久精品vr综合| 无码人妻一区二区三区精品视频 | 91麻豆精品视频| 国产精品一区二区久久精品无码| 国产成人精品美女在线| 精品无码成人久久久久久 | 在线精品一区二区三区| 亚洲国产成人精品青青草原|