SCRUBBING DEBRIS FROM A BORED WELL

摘要

The present disclosure provides methods and compositions for scrubbing debris from a bored well and includes injecting a suspension of acrylonitrile fibers, into the bored well to its open end. The suspension of acrylonitrile fibers scrubs the bored well of loose debris without substantially impeding the drilling capability of the rig by raising the effective liquid viscosity in the bored well. Also provided are pre-measured form factors of the acrylonitrile fibers for convenient and precise preparation of the acrylonitrile fiber suspension at the bored well site.

主权项

1. A method of cleaning unwanted materials from a substantially vertical bored well comprising:
injecting under pressure a liquid suspension into a conduit inserted into said bored well wherein the conduit and the bored well define an annulus therebetween; sweeping unwanted materials from the annulus by directing the liquid suspension through the annulus to the unwanted materials; wherein the liquid suspension comprises acrylonitrile fibers suspended in a liquid.