Method of reducing dust with self-assembly composites
AssigneeBaker Hughes Incorporated
InventorsMark Alan Vorderbruggen, Christopher John Stephenson, Naima Bestaoui-Spurr, Qi Qu
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Abstract
Well treatment particulates are coated with polyionic material and a composite is formed comprising multiple layers of polyelectrolyte, each layer composed of polyionic material counter to the polyionic material of the polyelectrolyte layer to which it is adjacent.
Claims21
A method of reducing the amount of dust generated from a well treatment particulate during transport of the well treatment particulate or during pumping of the well treatment particulate into a well, the surface of the well treatment particulate having a positive or negative charge, the method comprising:
- (a) forming onto at least a portion of the surface of the well treatment particulate at least two adjacent polyelectrolyte layers wherein the first polyelectrolyte layer adjacent to the surface of the well treatment particulate comprises a polyionic material and has a charge opposite to the charge of the surface of the well treatment particulate and further wherein the second polyelectrolyte layer adjacent to the first polyelectrolyte layer comprises a polyionic material having a charge opposite to the charge of the surface of the first polyelectrolyte layer;
- and
- (b) transporting the well treatment particulate or pumping into the well the well treatment particulate having a coating of the least two adjacent polyelectrolyte layers wherein the amount of dust generated during transport or pumping of the well treatment particulate containing the coating of the least two adjacent polyelectrolyte layers is less than the amount of dust generated during transport or pumping of the well treatment particulate not containing the coating of the least two adjacent polyelectrolyte layers.
A method of reducing the generation of dust during transport of a charged well treatment particulate or during pumping of the charged well treatment particulate into a well, the method comprising:
- (a) forming a composite by coating onto the surface of the well treatment particulate a succession of charged polyelectrolyte layers containing a polyionic material, wherein the succession of charged polyelectrolyte layers self-assemble such that the polyionic material of the polyelectrolyte layer adjacent to the well treatment particulate is the counterion to the charged well treatment particulate and the polyionic material of each polyelectrolyte layer is the counterion to the polyionic material of the adjacent polyelectrolyte layer;
- and
- (b) transporting the composite or pumping the composite into the well wherein the amount of dust generated from the well treatment particulate is reduced by the one or more polyelectrolyte layers self-assembled onto the well treatment particulate.
The method of 13, wherein the well treatment particulate contains silicon.
A method of reducing the amount of dust generated from a well treatment particulate during transport of the well treatment particulate or during pumping of the well treatment particulate into a well wherein the well treatment particulate has a charged surface and is a proppant or sand control particulate, the method comprising transporting or pumping the well treatment particulate as a composite formed by applying onto at least a portion of the surface of the well treatment particulate at least two adjacent polyelectrolyte layers wherein the first polyelectrolyte adjacent to the surface of the well treatment particulate comprises a polyionic material and has a charge opposite to the charge on the surface of the well treatment particulate and further wherein the second polyelectrolyte adjacent to the first polyelectrolyte comprises a polyionic material having a charge opposite to the charge of the first polyelectrolyte, wherein the amount of dust generated during transport or pumping of the well treatment particulate containing the at least two adjacent polyelectrolyte layers is less than the amount of dust generated during transport or pumping of the well treatment particulate not containing the coating of the at least two adjacent polyelectrolyte layers.
The method of 18, wherein the well treatment particulate contains silicon.
Dependencies are inferred from the claim text.