论文部分内容阅读
KDX474井是胜利海上一口5段式大斜度定向井,二开过程中,卡钻事故的处理直接导致井眼的全井扩大率在29.2%(平均井径311.8mm)以上。5段式和大井眼给固井工作带的严重挑战,为确保套管顺利下入以及提高套管居中度,使用了液压扶正器。该工具原始外径小、下入安全,采用双级定压球座+液压扶正器套管组合,投球胀封的方式。膨胀后外径大、扶正能力强,能够极大的提高下入套管柱在大井眼中的居中度,并且下入井段的固井质量也充分证明了液压扶正器的良好效果。
Well KDX474 is a 5-segment, highly inclined directional well at Shengli Sea. In the second opening, the handling of stuck pipe accidents directly led to the whole borehole expansion rate being above 29.2% (average well diameter 311.8mm). 5-section and big hole to cementing the work of a serious challenge, in order to ensure the smooth casing into the casing and improve casing centering, the use of hydraulic centralizer. The original tool diameter small, into the safety, the use of two-stage fixed pressure ball seat + hydraulic centralizer casing combination, the way the ball inflated seal. After expansion, the outer diameter is large and the righting-up capability is strong, which can greatly improve the centering efficiency of the casing string in the big wellbore, and the well cementing quality of the well into the well well proves the good effect of the hydraulic centralizer.