公开(公告)号：US5249844A

公开(公告)日：1993-10-05

申请号：US782283

申请日：1991-09-19

申请人： James M. Gronseth

发明人： James M. Gronseth

IPC分类号： E21B43/29 ,  E21C41/24 ,  E21C25/60 ,  E21C45/00

CPC分类号： E21B43/29

摘要： A borehole mining process for recovery of petroleum from unconsolidated heavy oil formations. The process consists of drilling a borehole in the unconsolidated heavy oil reservoir, which is formed from sand particles aggregated by heavy oil, and positioning a casing and a first and second tubing string within the borehole. At least one nozzle is positioned on the lower end of the second tubing string and is oriented for fluid emission generally radially outwardly from the second tubing string. Fluid is then flowed downwardly through the second tubing string and outwardly through the nozzle, thereby eroding a cavity in the reservoir and forming a slurry consisting of the fluid, the heavy oil, and the particles from the reservoir. The slurry is flowed upwardly through the annulus between the first and second tubing strings to the upper end of the borehole for recovery of the heavy oil.

摘要翻译： 用于从未固结的重油地层回收石油的钻孔开采过程。 该过程包括在由重油聚集的砂粒形成的未固结的重油储层中钻孔，并将壳体和第一和第二管柱定位在钻孔内。 至少一个喷嘴定位在第二管柱的下端，并且被定向成用于从第二管柱通常径向向外的流体排放。 然后，流体向下流过第二管柱并向外流过喷嘴，从而侵蚀储存器中的空腔，并形成由流体，重油和来自储存器的颗粒组成的浆料。 浆料向上流过第一和第二管柱之间的环形空间至钻孔的上端，用于回收重油。