Downhole mixing device for mixing a first fluid with a second fluid
First Claim
1. A downhole tool comprising:
- an inlet for engaging a formation in a subterranean environment and withdrawing formation fluid from the formation and into the downhole tool;
an apparatus for mixing a first fluid with the formation fluid, the apparatus comprising;
a chamber having a first end, a second end, and at least one opening, wherein the at least one opening allows fluid to flow into the chamber;
a perforated piston positioned within the chamber, wherein the perforated piston comprises a bottom surface, a top surface, and one or more channels that allow fluid to flow between the top surface and the bottom surface of the perforated piston; and
at least one movable piston positioned within the chamber, wherein the movable piston generates a seal between the first end and the second end of the chamber and is movable along the chamber towards the first end and towards the second end of the chamber.
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Accused Products
Abstract
Methods and devices for mixing a first fluid with a second fluid downhole include a chamber having a first end, a second end and an opening for fluid to flow there through. A top surface of a perforated piston is capable of contacting the second end and a top surface of a piston is capable of contacting a bottom surface of the perforated piston. The perforated piston is located at a first position within the chamber based upon characteristics of a first fluid. A first fluid delivery system supplies the first fluid and a second fluid delivery system supplies a second fluid to the chamber, wherein the second fluid is at a pressure that moves the piston approximate to the first end. An actuating device applies a force against the bottom surface of the piston to inject the fluids through channels of the perforated piston to produce spray droplets.
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Citations
48 Claims
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1. A downhole tool comprising:
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an inlet for engaging a formation in a subterranean environment and withdrawing formation fluid from the formation and into the downhole tool; an apparatus for mixing a first fluid with the formation fluid, the apparatus comprising; a chamber having a first end, a second end, and at least one opening, wherein the at least one opening allows fluid to flow into the chamber; a perforated piston positioned within the chamber, wherein the perforated piston comprises a bottom surface, a top surface, and one or more channels that allow fluid to flow between the top surface and the bottom surface of the perforated piston; and at least one movable piston positioned within the chamber, wherein the movable piston generates a seal between the first end and the second end of the chamber and is movable along the chamber towards the first end and towards the second end of the chamber. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26)
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27. A downhole method for mixing a first fluid with a formation fluid within a chamber that comprises a first end, a second end, a perforated piston, at least one movable piston, and at least one opening, the method comprising:
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(a) introducing the formation fluid into the chamber through the at least one opening so that at least a portion of the first fluid passes through one or more channels in the perforated piston; (b) moving the movable piston towards the perforated piston and the second end of the chamber to inject at least a portion of the first fluid through the one or more channels of the perforated piston and into the formation fluid; (c) moving the movable piston away from the perforated piston and towards the first end of the chamber; and (d) repeating steps (b) and (c) one or more times to form a mixture between the first fluid and the formation fluid. - View Dependent Claims (28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48)
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Specification