公开(公告)号：WO1994004256A1

公开(公告)日：1994-03-03

申请号：PCT/US1993004895

申请日：1993-05-25

Applicant: MARATHON OIL COMPANY

Inventor： MARATHON OIL COMPANY ,  SOUTHWELL, George, P.

IPC: B01F05/06

CPC classification number: B01F5/0682 ,  B01F5/0406 ,  B01F5/0693 ,  Y10S261/26 ,  Y10S366/604

Abstract: A foam generator is provided for in-line installation within a surface tubing network. The generator has a foaming chamber (10) with a plurality of permeable screens (52) positioned in series along a continuous flowpath through the foaming chamber. The screens are separated from one another by spacers (76, 78) that define the radial boundaries of the flowpath. According to one embodiment, the screens and spacers are mounted in a cartridge that fits into the foaming chamber to maintain proper screen alignment and facilitate removal of the screens from the chamber for maintenance. In an alternate embodiment, the screens and spacers are mounted directly in the chamber. In both embodiments, the screens are aligned orthogonal to the flowpath enabling the generator to produce a properly textured foam from shear-sensitive fluids with relatively little shear degradation. The foaming chamber exhibits a substantially uniform incremental pressure drop along any segment of its length and a minimum total pressure drop across its entirety as a function of the number of screens in the foaming chamber, the size and pattern of the openings through the screens, and the cross-sectional area of the flowpath delineated by the spacers.

Abstract translation: 提供泡沫发生器用于在表面管网内进行在线安装。 发生器具有发泡室（10），其具有多个可渗透筛网（52），其沿着连续的流动路径定位成串联通过发泡室。 屏幕通过限定流路的径向边界的间隔物（76,78）彼此分开。 根据一个实施例，屏幕和间隔件安装在装配到发泡室中的盒中以保持适当的屏幕对准，并且便于从室中移除屏幕用于维护。 在替代实施例中，屏幕和间隔件直接安装在腔室中。 在两个实施例中，筛网与流路正交对准，使得发生器能够产生具有相对较小剪切降解的剪切敏感流体的适当纹理的泡沫。 发泡室沿着其长度的任何部分呈现基本上均匀的增加的压降，并且其整体上的最小总压降是发泡室中的筛网数量，通过筛网的开口的尺寸和图案的函数，以及 由间隔物描绘的流路的横截面积。