Method and apparatus to improve perforating effectiveness using a unique multiple point initiated shaped charge perforator
    7.
    发明授权
    Method and apparatus to improve perforating effectiveness using a unique multiple point initiated shaped charge perforator 有权
    使用独特的多点起动成形电荷穿孔器来改善穿孔效果的方法和装置

    公开(公告)号:US06925924B2

    公开(公告)日:2005-08-09

    申请号:US10684858

    申请日:2003-10-14

    CPC分类号: E21B43/117 F42B1/02

    摘要: A non-linear shaped charge perforator for use in perforating an oil and gas formation into which a wellbore has been drilled comprises a monolithic, axisymmetric metal case in which is disposed a main explosive charge between the front of the case, which is closed with a concave metal liner, and the closed back end of the case. The main explosive charge contains multiple initiation points, preferably two initiation points located about 180° apart on the outside surface of the charge, so that when the perforator is detonated the main charge is initiated such that the metal liner is collapsed into a non-circular jet, preferably a fan-shaped jet, that pierces the casing of the wellbore and forms non-circular perforations, preferably slot-shaped perforations, in the surrounding formation.

    摘要翻译: 一种用于穿孔钻井的油气层的非线性形状的充气穿孔器包括一个整体式的轴对称金属壳体,其中在壳体的前部之间设置主要的炸药, 凹形金属衬里和封闭的后端。 主要的炸药包含多个起始点,优选地在电荷的外表面上分开约180°的两个起始点,使得当穿孔器被引爆时,引起主电荷使得金属衬垫被折叠成非圆形 喷射,优选是扇形喷射器,其刺穿井眼的壳体并在周围地层中形成非圆形穿孔,优选为狭缝形穿孔。