Clyde BergAnaheim, CA

4406744, Sep 27, 1983

Nov 16, 1981

6/321901

Clyde Berg - Long Beach CA

C10B 4906
C10B 5702
C10B 5712

201 17

The production of hydrogenated tar and distillates from coal which is passed through successive condensing, hydrogenation, desulfurization and cooling zones of a dense bed while a flue gas is discharged into the lower portion of the desulfurization zone in admixture with steam and hydrogen for countercurrent flow contact with the coal and coke solids. The gases evolved from the desulfurization zone are passed into countercurrent contact with the coal in the preceding hydrogenation zone where the high boiling coal tar fractions evolved from the coal are hydrogenated and pyrolyzed. The total effluent from the hydrogenation zone is then passed into countercurrent contact with the coal in the condensing zone, preheating the coal by direct contact and initiating the pyrolysis of the coal. The preferred method is practiced in a vertical kiln through which the coal is passed as a dense, compact gravitating bed of solids. The kiln preferably has a centrally disposed gas burner with an oscillating internal baffle which prevents agglomeration of the coal solids.

4189923, Feb 26, 1980

Mar 22, 1978

5/889038

Clyde Berg - Long Beach CA

F03G 700

60641

There is disclosed a method for recovering energy from subterranean geothermal brines and increasing geothermal well production. The method comprises establishing a column of brine in a well casing having a tubing therein, open at its lower end to the column of brine and injecting a high pressure vapor such as nitrogen or steam into the bottom of the tubing in sufficient quantities to form a mixture of brine and vapor having a substantially lesser density than the surrounding column of brine whereby the hydrostatic head of the column of brine lifts the mixture to the surface. The mixture is withdrawn from the well and passed to a vapor-liquid separator where the vapor portion is separated without effecting any significant reduction in pressure of the produced mixture, whereby the pressure is maintained on the brine in the well at a sufficient value to prevent carbonate and scale formation. In the preferred embodiment, the separated vapor is divided into two portions, one portion goes to production and is used to produce energy or as a high temperature heat source. The other portion is repressured and injected into the well as the source of high pressure vapor used therein.

4059156, Nov 22, 1977

Apr 29, 1976

5/681565

Clyde H. Berg - Long Beach CA

E21C 4328

166314

There is disclosed a method for the production of geothermal brines that avoids depressuring the brine below its flash point in the well bore and thereby avoids the scaling and plugging unavoidably experienced whenever high salt content brines are depressured, releasing carbon dioxide and upsetting their solubility equilibrium and precipitating calcium carbonate. The invention avoids the flashing of the geothermal brine by injecting a lift fluid immiscible with and of substantially lesser density than the brine into the production tubing to form a column of a mixture of brine and lift fluid which has a sufficiently lesser density than the column of brine that the hydrostatic head of the column of brine raises the mixture to the surface from where it is withdrawn without flashing, separating the lift fluid and processing the brine for heat recovery. Where the brine is extremely hot, the pressure is maintained at higher levels to avoid flashing by an additional column of brine below the production level. This is provided by establishing a column of the geothermal brine a substantial depth below its production interval, installing a production tubing for a substantial depth in the column of brine and injecting a lift fluid which yields a higher pressure at the top of the well.