Method for mixing fluids downhole
First Claim
1. A downhole mixing apparatus for mixing a first fluid with a second fluid, the downhole mixing apparatus comprising:
- a chamber having a first end, a second end, a first opening that allows fluid to flow into the first end of the chamber, and a second opening that allows fluid to flow into the second end of the chamber;
at least one piston positioned within the chamber, wherein the piston (i) generates a seal between the first end and the second end of the chamber, (ii) is movable along the chamber towards the first end and towards the second end of the chamber, and (iii) comprises at least one agitator mixing device attached to a bottom surface of the at least one piston; and
a fluid delivery system configured (i) to supply a volume of the second fluid to the chamber through the first opening and (ii) to move the piston inside the chamber so that the at least one agitator mixing device mixes the first fluid with the second fluid.
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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 piston is capable of contacting the second end of the chamber. The piston is located at a first position within the chamber based upon characteristics of a second fluid. A fluid delivery system supplies the first fluid and supplies a second fluid through a first opening of the chamber, wherein the second fluid is at a pressure that moves the piston approximate to the second end of the chamber. The piston includes an agitator mixing device that is attached to a bottom surface of the piston, wherein mixing of the first fluid with the second fluid primarily occurs upon movement of the piston by actuating device.
74 Citations
34 Claims
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1. A downhole mixing apparatus for mixing a first fluid with a second fluid, the downhole mixing apparatus comprising:
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a chamber having a first end, a second end, a first opening that allows fluid to flow into the first end of the chamber, and a second opening that allows fluid to flow into the second end of the chamber; at least one piston positioned within the chamber, wherein the piston (i) generates a seal between the first end and the second end of the chamber, (ii) is movable along the chamber towards the first end and towards the second end of the chamber, and (iii) comprises at least one agitator mixing device attached to a bottom surface of the at least one piston; and a fluid delivery system configured (i) to supply a volume of the second fluid to the chamber through the first opening and (ii) to move the piston inside the chamber so that the at least one agitator mixing device mixes the first fluid with the second fluid. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20)
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21. A downhole mixing method for mixing a first fluid with a second fluid within a chamber that comprises a first end, a second end, a first opening, and at least one piston with at least one agitator mixing device attached to a bottom surface of the piston, the downhole mixing method comprising:
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(a) supplying the second fluid to the first end of the chamber through the first opening to move the piston towards the second end of the chamber, wherein the first fluid is loaded within the first end of the chamber; (b) moving the piston in a direction from the second end toward the first end of the chamber; (c) moving the piston in a reverse direction from the first end toward the second end of the chamber; and (d) repeating steps (b) and (c) one or more times to mix the first fluid and the second fluid using the agitator mixing device. - View Dependent Claims (22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34)
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Specification