Mixing Apparatus and Method of Using Same
AssigneeCubility AS
InventorsJan Kristians Vasshus, Trond Melhus
Life of this patent
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Abstract
An apparatus and a method for admixing an additive for a drilling fluid. for use in the drilling of a petroleum well are described. The apparatus includes a mixing chamber which is connected, in terms of fluid, to an inlet line for drilling fluid, an outlet line for drilling fluid and at least one dosing device for an additive. The dosing device being arranged to supply the additive from a container to the mixing chamber and to form a pressure-tight barrier between the mixing chamber and the container. A pumping device is arranged downstream of the mixing chamber, which is arranged to suck drilling fluid through the mixing chamber.
Claims11
An apparatus (1) for admixing an additive for a drilling fluid for use in the drilling of a petroleum well, said apparatus (1) comprising:
- a closed mixing chamber (3), to which there are connected, in terms of fluid, an inlet line (5) for drilling fluid, an outlet line (7) for drilling fluid and at least one dosing device (9, 9′) for an additive, the dosing device (9, 9′) being arranged to supply, in an open position, the additive from at least one container (11, 11′) to the mixing chamber (3) and being arranged to form, in a closed position, a pressure-tight barrier between the mixing chamber (3) and the at least one container (11, 11′);
- and
- a pumping device (13) arranged downstream of the mixing chamber (3), which is arranged to create an underpressure in the mixing chamber (3) so that both drilling fluid and additive are sucked into and through the mixing chamber (3) when the dosing device (9, 9′) is in an open position.
A method of admixing an additive for a drilling fluid for use in the drilling of a petroleum well, said method comprising the steps of:
- providing an underpressure in a mixing chamber (3) by means of a pumping device (13);
- sucking drilling fluid through the mixing chamber (3) by means of the pumping device (13);
- and
- controlling the supply of an additive from at least one container (11, 11′) by means of a dosing device (9, 9′) which is arranged to be operated between a closed position, in which the dosing device (9, 9′) forms a pressure-tight barrier between the container (11, 11′) and the mixing chamber (3), and an open position, in which the additive is sucked from the container (11, 11′) into the mixing chamber (3).
Dependencies are inferred from the claim text.