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    • 6. 发明授权
    • Independent screwed wellhead with high pressure capability and method
    • 独立螺纹井口,具有高压能力和方法
    • US5605194A
    • 1997-02-25
    • US492350
    • 1995-06-19
    • Leslie D. Smith
    • Leslie D. Smith
    • E21B33/03E21B33/06E21B33/04
    • E21B33/06E21B33/03
    • An independent screwed wellhead apparatus and method provide for connecting a high pressure casing nipple (34) to internal threads (36) disposed along the bore (38) of the wellhead body (12) to temporarily increase the working pressure capability of the wellhead body (12). The internal threads (36) are supported by a thick wall (44) of the wellhead body (12) disposed in a lower end (13) of the wellhead body (12). The lower end (13) of the wellhead body (12) has a higher working pressure capability than the upper end (19) of the wellhead body (12). The high pressure casing nipple (34) temporarily isolates the upper end (19) from the higher pressure.
    • 独立的螺旋井口设备和方法提供将高压套管接头(34)连接到沿着井口体(12)的孔(38)设置的内螺纹(36),以临时提高井口体的工作压力能力 12)。 内螺纹(36)由设置在井口体(12)的下端(13)中的井口体(12)的厚壁(44)支撑。 井口主体(12)的下端(13)具有比井口体(12)的上端(19)更高的工作压力能力。 高压套管接头(34)暂时隔离上端(19)与较高的压力。