Abrasive suspension eroding system
AssigneeANT Applied New Technologies AG
InventorsMarco Linde, Svein H. Sølversen
Life of this patent
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Abstract
An abrasive suspension eroding system has an eroding unit (11), which can be lowered into an existing drilled hole (1), in order to generate a high-pressure erosion jet for the abrasive suspension eroding of material (6, 20) in an existing drilled hole (1). The eroding unit (11) can be connected to a drilling fluid line (9) and is configured to generate a high-pressure erosion jet from a drilling fluid abrasive suspension device.
Claims20
An abrasive suspension eroding system comprising an eroding unit which can be let down into an existing borehole for producing a high-pressure erosion jet for the abrasive suspension eroding of material in the existing borehole, wherein the eroding unit is connectable to a drilling fluid conduit and is configured to produce a high-pressure erosion jet from a drilling fluid-abrasive agent suspension, the eroding unit comprising a distal nozzle head section and a proximal anchoring section, wherein the nozzle head section is distally movable relative to the anchoring section, the nozzle head section comprising a distal nozzle head and a proximal nozzle head base, wherein the nozzle head is rotatable relative to the nozzle head base about a rotation axis, the eroding unit comprising at least one first nozzle and at least one second nozzle, wherein the at least one first nozzle is aligned for producing an obliquely radially outwardly directed erosion jet and the at least one second nozzle for producing an obliquely radially inwardly directed erosion jet, wherein the at least one second nozzle has a distance to the rotation axis of the nozzle head.
A borehole facility comprising:
- a drilling fluid conduit;
- and
- an abrasive suspension eroding system comprising an eroding unit which can be let down into an existing borehole for producing a high-pressure erosion jet for an abrasive suspension eroding of material in the existing borehole, wherein the eroding unit is connectable to the drilling fluid conduit and is configured to produce a high-pressure erosion jet from a drilling fluid-abrasive agent suspension, wherein the eroding unit is fluid-connected to the drilling fluid conduit, the eroding unit comprising a distal nozzle head section and a proximal anchoring section, wherein the nozzle head section is distally movable relative to the anchoring section, the nozzle head section comprising a distal nozzle head and a proximal nozzle head base, wherein the nozzle head is rotatable relative to the nozzle head base about a rotation axis, the eroding unit comprising at least one first nozzle and at least one second nozzle, wherein the at least one first nozzle is aligned for producing an obliquely radially outwardly directed erosion jet and the at least one second nozzle for producing an obliquely radially inwardly directed erosion jet, wherein the at least one second nozzle has a distance to the rotation axis of the nozzle head.
A method for an abrasive-suspension eroding of material within an existing borehole, the method comprising the steps of:
- letting down an eroding unit into the existing borehole, wherein the eroding unit is fluid-connected to an abrasive agent supply unit via a drilling fluid conduit,
- feeding abrasive agent into the drilling fluid conduit by way of the abrasive agent supply unit,
- pumping a drilling fluid-abrasive agent suspension through the drilling fluid conduit to the eroding unit by way of a drilling fluid high-pressure pump,
- producing a high-pressure erosion jet of the drilling fluid-abrasive agent suspension by way of the eroding unit, and
- eroding material in the existing borehole by way of the high-pressure erosion jet of the drilling fluid-abrasive agent suspension, wherein a distal nozzle head section of the eroding unit is distally moved relative to a proximal anchoring section of the eroding unit and a distal nozzle head of the nozzle head section is rotated relative to a proximal nozzle head base of the nozzle head section about a rotation axis, wherein an obliquely radially outwardly directed erosion jet is produced by at least one first nozzle of the nozzle head and an obliquely radially inwardly directed erosion jet is produced by at least one second nozzle of the nozzle head, wherein the at least one second nozzle has a distance to the rotation axis of the nozzle head.
Dependencies are inferred from the claim text.