Method of injecting fluids into underground formations

Details Method of injecting fluids into underground formations Method of injecting fluids into underground formations

E - Fixed Constructions

21

B

166/32

E21B 43/20 (2006.01) E21B 43/12 (2006.01)

Patent

CA 1063014

METHOD OF INJECTING FLUIDS INTO UNDERGROUND FORMATIONS Abstract of the Disclosure. A method of injecting fluids into underground formations such as oil wells, and particularly advantageous for treating low-pressure formations having bottom- hole pressures below normal tubing hydrostatic pressure, utilizes the steps of lowering into the borehole a tubing string, locating near the formation to be treated a partially pressure-balanced valve adapted to support a column of fluid in the string of tubing, and applying pressure to the column of fluid in the tubing to in- ject fluid through the valve and into the formation. 1a

269843

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