Method of rapidly abandoning large cavities washed-out in rock s

Details Method of rapidly abandoning large cavities washed-out in rock s Method of rapidly abandoning large cavities washed-out in rock s

1989-06-02

1991-04-02

Suchfield, George A.

Mining or in situ disintegration of hard material

In situ conversion of solid to fluid

Dissolving or chemical reaction

166253, 166285, 166292, 405128, B09B 300, E21B 4328, E21B 4704

Patent

active

050042980

ABSTRACT:
After they have been washed out, cavities (4) in rock salt contain a large quantity of brine (8) at a temperature which is lower than the temperature of the surrounding formation (2). This means that the cavity cannot be sealed quickly because the brine will expand progressively as it heats up. The method of the invention serves to shorten the time period between the end of working the cavity for salt and being able to abandon the cavity finally from about 30 years to about 2 years. The method consists in injecting quantities of a mixture (12) into the cavity (4), the mixture being of greater density than brine (8) and being capable of setting, with equivalent quantities of brine (8) being returned to the surface, and then in keeping the cavity (4) open after it has been completely filled with mixture (12) for as long as it takes the rock salt (2) to creep and fill up the shrinkage voids which appear during setting of the mixture (12), after which the cavity (4) can be sealed. To do this, it is advantageous to make use of waste material for constituting the mixture (12).

REFERENCES:
patent: 1812943 (1931-07-01), Granger
patent: 2524933 (1950-10-01), Silverman
patent: 3366419 (1968-06-01), Pasternak et al.
patent: 3724898 (1973-04-01), Jacoby
patent: 4007964 (1977-02-01), Goldsmith
patent: 4275788 (1981-06-01), Sweatman
patent: 4367985 (1983-01-01), Tomaszewski et al.
patent: 4456400 (1984-06-01), Heide et al.
patent: 4576513 (1986-03-01), Lindorfer et al.
patent: 4577999 (1986-03-01), Lindorfer et al.
patent: 4692061 (1987-09-01), Lindorfer et al.
patent: 4746249 (1988-05-01), Haigh et al.

Affiliated with

Also associated with

Rating

Method of rapidly abandoning large cavities washed-out in rock s does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Method of rapidly abandoning large cavities washed-out in rock s, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method of rapidly abandoning large cavities washed-out in rock s will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-323829