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US 10,240,432 B2Granted
Grout delivery
AssigneeReflex Technology International Pty Ltd.
InventorsJames Barry Reilly, Michael Gerasimoff
Life of this patent
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AssigneeReflex Technology International Pty Ltd.
InventorsJames Barry Reilly, Michael Gerasimoff
Estimating the term…
A grout delivery system for delivery of a grout as a flowable substance comprising a mixture of two grout component materials at a downhole location. The grout delivery system comprises an elongate body comprises two reservoirs configured as cartridges for receiving respective charges of the two grout component materials. The two cartridges each comprise a piston. A selectively openable closure configured as a valve is provided adjacent the bottom end of each cylinder. Each piston is operably to progressively advance towards the valve, thereby expelling grout component material from the respective cartridge through the valve. When the grout delivery system is at the desired location downhole and a fluid seal established downhole, fluid such as water is pumped into the drill string and pressurized. Initially, fluid pressure is exerted on the two pistons indirectly via an actuator to initiate movement of the two pistons in concert. At a later stage, fluid under pressure is exerted directly on the pistons to continue their movement in concert. Retrieval of the grout delivery system may necessitate relief of the hydrostatic pressure differential across the fluid seal established downhole so that the grout delivery system can be lifted relatively easily from the downhole drilling assembly. A selectively operable pressure relief system is provided for this purpose.
A delivery system for delivery of a flowable substance as a mixture comprising first and second components at a location to which the delivery system is conveyed, the delivery system comprising a first reservoir for receiving a charge of the first component, a second reservoir for receiving a charge of the second component, each reservoir being defined within a respective body defining a cylinder having a first end and a second end, a piston receivable in the cylinder for sliding movement therealong, each piston being operable for movement along the respective cylinder in response to fluid pressure, and an actuator, whereby fluid pressure can act initially upon the actuator to initiate movement of the pistons in concert and subsequently bypass the actuator to act directly upon the pistons to continue movement of the pistons in concert along the cylinders.
Dependencies are inferred from the claim text.