Slurry density averaging system and apparatus

Claim 2

Cement slurry density averaging apparatus comprising, in combination, primary mixing means for mixing a slurry of bulk cement and water, and density averaging means cooperative with said primary mixing means for reducing variations in the density of said slurry, said primary mixing means including a mixing chamber, primary pump means for circulating slurry through said chamber, means for supplying slurry to said primary mixing means, said density averaging means including a closed mixing tank, means for conducting slurry from said primary mixing means to said tank, averaging pump means for circulating slurry through said tank, and means for conducting slurry from said density averaging means, wherein said means for conducting slurry from said primary mixing means to said tank includes a manifold, and jet nozzle means connected with said manifold and entering said tank, said jet nozzle means including a plurality of nozzles entering said tank at angles to one another.

Claim 3

Cement slurry density averaging apparatus comprising, in combination, primary mixing means for mixing a slurry of bulk cement and water, and density averaging means cooperative with said primary mixing means for reducing variations in the density of said slurry, said primary mixing means including a mixing chamber, primary pump means for circulating slurry through said chamber, means for supplying slurry to said primary mixing means, said density averaging means including a closed mixing tank, means for conducting slurry from said primary mixing means to said tank, averaging pump means for circulating slurry through said tank, and means for conducting slurry from said density averaging means, wherein said means for conducting slurry from said primary mixing means to said tank includes a manifold, and jet nozzle means connected with said manifold and entering said tank, said tank being cylindrical and said jet nozzle means including a plurality of nozzles entering said tank at angles whereby the entry of slurry from said nozzles into said tank is tangential.

Claim 4

Cement slurry density averaging apparatus comprising, in combination, primary mixing means for mixing a slurry of bulk cement and water, and density averaging means cooperative with said primary mixing means for reducing variations in the density of said slurry, said primary mixing means including a mixing chamber, primary pump means for circulating slurry through said chamber, means for supplying slurry to said primary mixing means, said density averaging means including a closed mixing tank, means for conducting slurry from said primary mixing means to said tank, averaging pump means for circulating slurry through said tank, and means for conducting slurry from said density averaging means, wherein said means for conducting slurry from said primary mixing means to said tank includes a manifold, and jet nozzle means connected with said manifold and entering said tank, said tank being cylindrical and said jet nozzle means including a plurality of nozzles entering said tank at angles whereby the entry of slurry from said nozzles into said tank is tangential.

Claim 5

Cement slurry density averaging apparatus comprising, in combination, primary mixing means for mixing a slurry of bulk cement and water, and density averaging means cooperative with said primary mixing means for reducing variations in the density of said slurry, said primary mixing means including a mixing chamber, primary pump means for circulating slurry through said chamber, means for supplying slurry to said primary mixing means, said density averaging means including a closed mixing tank, means for conducting slurry from said primary mixing means to said tank, averaging pump means for circulating slurry through said tank, and means for conducting slurry from said density averaging means, wherein said means for conducting slurry from said primary mixing means to said tank includes a manifold, and jet nozzle means connected with said manifold and entering said tank, said tank being cylindrical and said jet nozzle means including a plurality of nozzles entering said tank at angles whereby the entry of slurry from said nozzles into said tank is tangential, and said nozzles being at angles to one another.

Claim 6

Cement slurry density averaging apparatus comprising, in combination, primary mixing means for mixing a slurry of bulk cement and water, and density averaging means cooperative with said primary mixing means for reducing variations in the density of said slurry, said primary mixing means including a mixing chamber, primary pump means for circulating slurry through said chamber, means for supplying slurry to said primary mixing means, said density averaging means including a closed mixing tank, means for conducting slurry from said primary mixing means to said tank, averaging pump means for circulating slurry through said tank, and means for conducting slurry from said density averaging means, wherein said means for conducting slurry from said primary mixing means to said tank includes a manifold, and jet nozzle means connected with said manifold and entering said tank, said tank being cylindrical and said jet nozzle means including a plurality of nozzles entering said tank at angles whereby the entry of slurry from said nozzles into said tank is tangential, and said nozzles being at angles to one another.

Claim 7

Cement slurry density averaging apparatus comprising, in combination, primary mixing means for mixing a slurry of bulk cement and water, and density averaging means cooperative with said primary mixing means for reducing variations in the density of said slurry, said primary mixing means including a mixing chamber, primary pump means for circulating slurry through said chamber, means for supplying slurry to said primary mixing means, said density averaginG means including a closed mixing tank, means for conducting slurry from said primary mixing means to said tank, averaging pump means for circulating slurry through said tank, and means for conducting slurry from said density averaging means, including continuously operable densimeter means cooperative with said primary mixing means and said density averaging means for comparing slurry density, and fast equalizing means between said primary mixing means and said density averaging means for diverting slurry from said density averaging means to said primary mixing means to equalize the density of the slurry.

Claim 8

Cement slurry density averaging apparatus comprising, in combination, primary mixing means for mixing a slurry of bulk cement and water, and density averaging means cooperative with said primary mixing means for reducing variations in the density of said slurry, said primary mixing means including a mixing chamber, primary pump means for circulating slurry through said chamber, means for supplying slurry to said primary mixing means, said density averaginG means including a closed mixing tank, means for conducting slurry from said primary mixing means to said tank, averaging pump means for circulating slurry through said tank, and means for conducting slurry from said density averaging means, including continuously operable densimeter means cooperative with said primary mixing means and said density averaging means for comparing slurry density, and fast equalizing means between said primary mixing means and said density averaging means for diverting slurry from said density averaging means to said primary mixing means to equalize the density of the slurry.

Claim 9

Cement slurry density averaging apparatus comprising, in combination, primary mixing means for mixing a slurry of bulk cement and water, and density averaging means cooperative with said primary mixing means for reducing variations in the density of said slurry, said primary mixing means including a mixing chamber, primary pump means for circulating slurry through said chamber, means for supplying slurry to said primary mixing means, said density averaging means including a closed mixing tank, means for conducting slurry from said primary mixing means to said tank, averaging pump means for circulating slurry through said tank, and means for conducting slurry from said density averaging means, including first conduit means leading from said primary pump means to said mixing chamber and to said tank, second conduit means leading from said tank to said averaging pump means, and third conduit means leading from said averaging pump means to said tank.

Claim 10

Cement slurry density averaging apparatus comprising, in combination, primary mixing means for mixing a slurry of bulk cement and water, and density averaging means cooperative with said primary mixing means for reducing variations in the density of said slurry, said primary mixing means including a mixing chamber, primary pump means for circulating slurry through said chamber, means for supplying slurry to said primary mixing means, said density averaging means including a closed mixing tank, means for conducting slurry from said primary mixing means to said tank, averaging pump means for circulating slurry through said tank, and means for conducting slurry from said density averaging means, including first conduit means leading from said primary pump means to said mixing chamber and to said tank, second conduit means leading from said tank to said averaging pump means, and third conduit means leading from said averaging pump means to said tank.

Claim 11

Cement slurry density averaging apparatus comprising, in combination, primary mixing means for mixing a slurry of bulk cement and water, and density averaging means cooperative with said primary mixing means for reducing variations in the density of said slurry, said primary mixing means including a mixing chamber, primary pump means for circulating slurry through said chamber, means for supplying slurry to said primary mixing means, said density averaging means including a closed mixing tank, means for conducting slurry from said primary mixing means to said tank, averaging pump means for circulating slurry through said tank, and means for conducting slurry from said density averaging means, including first conduit means leading from said primary pump means to said mixing chamber and to said tank, second conduit means leading from said tank to said averaging pump means, and third conduit means leading from said averaging pump means to said tank, said first and third conduit means being joined between said pump means and said tank.

Claim 12

Cement slurry density averaging apparatus comprising, in combination, primary mixing means for mixing a slurry of bulk cement and water, and density averaging means cooperative with said primary mixing means for reducing variations in the density of said slurry, said primary mixing means including a mixing chamber, primary pump means for circulating slurry through said chamber, means for supplying slurry to said primary mixing means, said density averaging means including a closed mixing tank, means for conducting slurry from said primary mixing means to said tank, averaging pump means for circulating slurry through said tank, and means for conducting slurry from said density averaging means, including first conduit means leading from said primary pump means to said mixing chamber and to said tank, second conduit means leading from said tank to said averaging pump means, and third conduit means leading from said averaging pump means to said tank, said first and third conduit means being joined between said pump means and said tank.

Claim 13

Cement slurry density averaging apparatus comprising, in combination, primary mixing means for mixing a slurry of bulk cement and water, and density averaging means cooperative with said primary mixing means for reducing variations in the density of said slurry, said primary mixing means including a mixing chamber, primary pump means for circulating slurry through said chamber, means for supplying slurry to said primary mixing means, said density averaging means including a closed mixing tank, means for conducting slurry from said primary mixing means to said tank, averaging pump means for circulating slurry through said tank, and means for conducting slurry from said density averaging means, including first conduit means leading from said primary pump means to said mixing chamber and to said tank, second conduit means leading from said tank to said averaging pump means, and third conduit means leading from said averaging pump means to said tank, said first and third conduit means being joined between said pump means and said tank, a manifold adjacent to said tank and connected to the junction of said first and second conduit means to receive slurry therefrom, and jet nozzle means connected with said manifold and said tank for conducting slurry into said tank at high velocity.

Claim 14

Cement slurry density averaging apparatus comprising, in combination, primary mixing means for mixing a slurry of bulk cement and water, and density averaging means cooperative with said primary mixing means for reducing variations in the density of said slurry, said primary mixing means including a mixing chamber, primary pump means for circulating slurry through said chamber, means for supplying slurry to said primary mixing means, said density averaging means including a closed mixing tank, means for conducting slurry from said primary mixing means to said tank, averaging pump means for circulating slurry through said tank, and means for conducting slurry from said density averaging means, including first conduit means leading from said primary pump means to said mixing chamber and to said tank, second conduit means leading from said tank to said averaging pump means, and third conduit means leading from said averaging pump means to said tank, said first and third conduit means being joined between said pump means and said tank, a manifold adjacent to said tank and connected to the junction of said first and second conduit means to receive slurry therefrom, and jet nozzle means connected with said manifold and said tank for conducting slurry into said tank at high velocity.

Claim 15

Cement slurry density averaging apparatus comprising, in combination, primary mixing means for mixing a Slurry of bulk cement and water, and density averaging means cooperative with said primary mixing means for reducing variations in the density of said slurry, said primary mixing means including a mixing chamber, primary pump means for circulating slurry through said chamber, means for supplying slurry to said primary mixing means, said density averaging means including a closed mixing tank, means for conducting slurry from said primary mixing means to said tank, averaging pump means for circulating slurry through said tank, and means for conducting slurry from said density averaging means, including first conduit means leading from said primary pump means to said mixing chamber and to said tank, second conduit means leading from said tank to said averaging pump means, and third conduit means leading from said averaging pump means to said tank, and an outlet control valve in said second conduit means.

Claim 16

Cement slurry density averaging apparatus comprising, in combination, primary mixing means for mixing a Slurry of bulk cement and water, and density averaging means cooperative with said primary mixing means for reducing variations in the density of said slurry, said primary mixing means including a mixing chamber, primary pump means for circulating slurry through said chamber, means for supplying slurry to said primary mixing means, said density averaging means including a closed mixing tank, means for conducting slurry from said primary mixing means to said tank, averaging pump means for circulating slurry through said tank, and means for conducting slurry from said density averaging means, including first conduit means leading from said primary pump means to said mixing chamber and to said tank, second conduit means leading from said tank to said averaging pump means, and third conduit means leading from said averaging pump means to said tank, and an outlet control valve in said second conduit means.

Claim 17

Cement slurry density averaging apparatus comprising, in combination, primary mixing means for mixing a slurry of bulk cement and water, and density averaging means cooperative with said primary mixing means for reducing variations in the density of said slurry, said primary mixing means including a mixing chamber, primary pump means for circulating slurry through said chamber, means for supplying slurry to said primary mixing means, said density averaging means including a closed mixing tank, means for conducting slurry from said primary mixing means to said tank, averaging pump means for circulating slurry through said tank, and means for conducting slurry from said density averaging means, including first conduit means leading from said primary pump means to said mixing chamber and to said tank, second conduit means leading from said tank to said averaging pump means, and third conduit means leading from said averaging pump means to said tank, and an outlet control valve means in said first conduit means between said primary pump means and said tank.

Claim 18

Cement slurry density averaging apparatus comprising, in combination, primary mixing means for mixing a slurry of bulk cement and water, and density averaging means cooperative with said primary mixing means for reducing variations in the density of said slurry, said primary mixing means including a mixing chamber, primary pump means for circulating slurry through said chamber, means for supplying slurry to said primary mixing means, said density averaging means including a closed mixing tank, means for conducting slurry from said primary mixing means to said tank, averaging pump means for circulating slurry through said tank, and means for conducting slurry from said density averaging means, including first conduit means leading from said primary pump means to said mixing chamber and to said tank, second conduit means leading from said tank to said averaging pump means, and third conduit means leading from said averaging pump means to said tank, and an outlet control valve means in said first conduit means between said primary pump means and said tank.

Claim 19

Cement slurry density averaging apparatus comprising, in combination, primary mixing means for mixing a slurry of bulk cement and water, and density averaging means cooperative with said primary mixing means for reducing variations in the density of said slurry, said primary mixing means including a mixing chamber, primary pump means for circulating slurry through said chamber, means for supplying slurry to said primary mixing means, said density averaging means including a closed mixing tank, means for conducting slurry from said primary mixing means to said tank, averaging pump means for circulating slurry through said tank, and means for conducting slurry from said density averaging means, including first conduit means leading from said primary pump means to said mixing chamber and to said tank, second conduit means leading from said tank to said averaging pump means, and third conduit means leading from said averaging pump means to said tank, said first and third conduit means being joined between said pump means and said tank, and outlet conduit means connected with said third conduit means between said averaging pump means and the junction between said first and third conduit means.

Claim 20

Cement slurry density averaging apparatus comprising, in combination, primary mixing means for mixing a slurry of bulk cement and water, and density averaging means cooperative with said primary mixing means for reducing variations in the density of said slurry, said primary mixing means including a mixing chamber, primary pump means for circulating slurry through said chamber, means for supplying slurry to said primary mixing means, said density averaging means including a closed mixing tank, means for conducting slurry from said primary mixing means to said tank, averaging pump means for circulating slurry through said tank, and means for conducting slurry from said density averaging means, including first conduit means leading from said primary pump means to said mixing chamber and to said tank, second conduit means leading from said tank to said averaging pump means, and third conduit means leading from said averaging pump means to said tank, said first and third conduit means being joined between said pump means and said tank, and outlet conduit means connected with said third conduit means between said averaging pump means and the junction between said first and third conduit means.

Claim 21

Cement slurry density averaging apparatus comprising, in combination, primary mixing means for mixing a slurry of bulk cement and water, and density averaging means cooperative with said primary mixing means for reducing variations in the density of said slurry, said primary mixing means including a mixing chamber, primary pump means for circulating slurry through said chamber, means for supplying slurry to said primary mixing means, said density averaging means including a closed mixing tank, means for conducting slurry from said primary mixing means to said tank, averaging pump means for circulating slurry through said tank, and means for conducting slurry from said density averaging means, including first conduit means leading from said primary pump means to said mixing chamber and to said tank, second conduit means leading from said tank to said averaging pump means, and third conduit means leading from said averaging pump means to said tank, said first and third conduit means being joined between said pump means and said tank, outlet conduit means connected with said third conduit means between said averaging pump means and the junction between said first and third conduit means, and outlet control valve means in said outlet conduit.

Claim 22

Cement slurry density averaging apparatus comprising, in combination, primary mixing means for mixing a slurry of bulk cement and water, and density averaging means cooperative with said primary mixing means for reducing variations in the density of said slurry, said primary mixing means including a mixing chamber, primary pump means for circulating slurry through said chamber, means for supplying slurry to said primary mixing means, said density averaging means including a closed mixing tank, means for conducting slurry from said primary mixing means to said tank, averaging pump means for circulating slurry through said tank, and means for conducting slurry from said density averaging means, including first conduit means leading from said primary pump means to said mixing chamber and to said tank, second conduit means leading from said tank to said averaging pump means, and third conduit means leading from said averaging pump means to said tank, said first and third conduit means being joined between said pump means and said tank, outlet conduit means connected with said third conduit means between said averaging pump means and the junction between said first and third conduit means, and outlet control valve means in said outlet conduit.

Claim 23

Cement slurry density averaging apparatus comprising, in combination, primary mixing means for mixing a slurry of bulk cement and water, and density averaging means cooperative with said primary mixing means for reducing variations in the density of said slurry, said primary mixing means including a mixing chamber, primary pump means for circulating slurry through said chamber, means for supplying slurry to said primary mixing means, said density averaging means including a closed mixing tank, means for conducting slurry from said primary mixing means to said tank, averaging pump means for circulating slurry through said tank, and means for conducting slurry from said density averaging means, including first conduit means leading from said primary pump means to said mixing chamber and to said tank, second conduit means leading from said tank to said averaging pump means, and third conduit means leading from said averaging pump means to said tank, continuously operable densimeter means cooperative with said primary mixing means and said density averaging means for comparing slurry density, and fast equalizing means between said primary mixing means and said density averaging means for diverting slurry from said density averaging means to said primary mixing means to equalize the density of the slurry.

Claim 24

Cement slurry density averaging apparatus comprising, in combination, primary mixing means for mixing a slurry of bulk cement and water, and density averaging means cooperative with said primary mixing means for reducing variations in the density of said slurry, said primary mixing means including a mixing chamber, primary pump means for circulating slurry through said chamber, means for supplying slurry to said primary mixing means, said density averaging means including a closed mixing tank, means for conducting slurry from said primary mixing means to said tank, averaging pump means for circulating slurry through said tank, and means for conducting slurry from said density averaging means, including first conduit means leading from said primary pump means to said mixing chamber and to said tank, second conduit means leading from said tank to said averaging pump means, and third conduit means leading from said averaging pump means to said tank, continuously operable densimeter means cooperative with said primary mixing means and said density averaging means for comparing slurry density, and fast equalizing means between said primary mixing means and said density averaging means for diverting slurry from said density averaging means to said primary mixing means to equalize the density of the slurry.

Claim 25

Cement slurry density averaging apparatus comprising, in combination, primary mixing means for mixing a slurry of bulk cement and water, and density averaging means cooperative with said primary mixing means for reducing variations in the density of said slurry, said primary mixing means including a mixing chamber, primary pump means for circulating slurry through said chamber, means for supplying slurry to said primary mixing means, said density averaging means including a closed mixing tank, means for conducting slurry from said primary mixing means to said tank, averaging pump means for circulating slurry through said tank, and means for conducting slurry from said density averaging means, including first conduit means leading from said primary pump means to said mixing chamber and to said tank, second conduit means leading from said tank to said averaging pump means, and third conduit means leading from said averaging pump means to said tank, continuously operable densimeter means cooperative with said primary mixing means and said density averaging means for comparing slurry density, and fast equalizing means between said primary mixing means and said density averaging means for diverting slurry from said density averaging means to said primary mixing means to equalize the density of the slurry, said fast equalizing means including a valved conduit leading from said third conduit means to said mixing chamber.

Claim 26

Cement slurry density averaging apparatus comprising, in combination, primary mixing means for mixing a slurry of bulk cement and water, and density averaging means cooperative with said primary mixing means for reducing variations in the density of said slurry, said primary mixing means including a mixing chamber, primary pump means for circulating slurry through said chamber, means for supplying slurry to said primary mixing means, said density averaging means including a closed mixing tank, means for conducting slurry from said primary mixing means to said tank, averaging pump means for circulating slurry through said tank, and means for conducting slurry from said density averaging means, including first conduit means leading from said primary pump means to said mixing chamber and to said tank, second conduit means leading from said tank to said averaging pump means, and third conduit means leading from said averaging pump means to said tank, continuously operable densimeter means cooperative with said primary mixing means and said density averaging means for comparing slurry density, and fast equalizing means between said primary mixing means and said density averaging means for diverting slurry from said density averaging means to said primary mixing means to equalize the density of the slurry, said fast equalizing means including a valved conduit leading from said third conduit means to said mixing chamber.

Claim 27

A tank for use in a slurry mixing and averaging system comprising, a closed cylindrical tank body, a plurality of jet nozzles leading into said body and disposed at angles to cause tangential entry of slurry into said tank, a manifold connected with said jet nozzles, said tank having an outlet, and means for exhausting air from said tank and slurry from said tank when said tank is full, including means providing a scoop in said tank at said outlet, said scoop including an inner wall paralleling the wall of said tank, side walls joining said inner wall to said wall of said tank, said inner wall and said side walls defining an inlet to said scoop.

Claim 28

A tank for use in a slurry mixing and averaging system comprising, a closed cylindrical tank body, a plurality of jet nozzles leading into said body and disposed at angles to cause tangential entry of slurry into said tank, a manifold connected with said jet nozzles, said tank having an outlet, and means for exhausting air from said tank and slurry from said tank when said tank is full, including means providing a scoop in said tank at said outlet, said scoop including an inner wall paralleling the wall of said tank, side walls joining said inner wall to said wall of said tank, said inner wall and said side walls defining an inlet to said scoop.

Claim 29

A tank for use in a slurry mixing and averaging system comprising, a closed cylindrical tank body, a plurality of jet nozzles leading into said body and disposed at angles to cause tangential entry Of slurry into said tank, a manifold connected with said jet nozzles, said tank having an outlet, and means for exhausting air from said tank and slurry from said tank when said tank is full, said tank having internal impingement plates disposed in the path of slurry exiting from said nozzles into said tank, and including means providing a scoop in said tank at said outlet, said scoop including an inner wall paralleling the wall of said tank, side walls joining said inner wall to said wall of said tank, said inner wall and said side walls defining an inlet to said scoop.

Claim 30

A tank for use in a slurry mixing and averaging system comprising, a closed cylindrical tank body, a plurality of jet nozzles leading into said body and disposed at angles to cause tangential entry Of slurry into said tank, a manifold connected with said jet nozzles, said tank having an outlet, and means for exhausting air from said tank and slurry from said tank when said tank is full, said tank having internal impingement plates disposed in the path of slurry exiting from said nozzles into said tank, and including means providing a scoop in said tank at said outlet, said scoop including an inner wall paralleling the wall of said tank, side walls joining said inner wall to said wall of said tank, said inner wall and said side walls defining an inlet to said scoop.