DQX-Ⅲ型旋转防喷器的研制与应用

Development and Application of Model DQX-Ⅲ Rotary BOP

由于大庆油田浅层井的现场施工条件限制,传统的旋转防喷器无法安装在低底座的井架上,同时不能满足高转速的要求。为此,研制了DQX-Ⅲ型旋转防喷器。它由旋转总成、壳体和泵站等3部分组成,采用全油循环的方式,润滑和冷却效果良好,能有效延长轴承和动密封的使用寿命,在浅层井中能保证钻进的连续性,优选的Kalsi动密封的结构和材质配方设计可大大延长其使用寿命。室内及现场试验结果表明,DQX-Ⅲ型旋转防喷器的动密封扭矩平稳,在浅层能用PDC钻头高速钻进,各项性能指标达到设计要求。

Due to the limits of the field operating conditions in shallow wells of Daqing Oilfield, the traditional rotary blowout pre-venter （BOP） cannot be installed on the derrick with a low substruetue. Meanwhile, the requirement of high speed rotation cannot be sat-isfied. Therefore, Model DQX -Ⅲ rotary BOP was developed. It consists of rotary assembly, shell body and pumping station. It adopts the all-oil circulation mode. The lubrication and cooling effect is desirable. It can effectively lengthen the service life of bearing and dy-namic seal. The drilling continuity can be ensured in shallow wells. The structure of the optimized Kalsi dynamic seal and the design of material formulation can lengthen its service life remarkably. The laboratory and field tests show that the torque of the BOP is smooth. It can carry out high speed drilling with the PDC bit in shallow layers. All indexes of performance have reached the design requirement.