Subsea multipiston pump module and subsea multistage pump
AssigneeFugro-Improv Pty Ltd
InventorsBrendan Reid, Keith Dicker, Ben Ash
Life of this patent
Estimating the term…
Abstract
The present invention relates to a subsea multipiston pump module, a subsea multistage pump and skid, having two reciprocating pistons controlled by a control means in such a way that the pistons can be driven either in a parallel mode, where the pistons are driven in phase with each other, or in a serial mode, where the pistons are driven out of phase with each other, wherein the pistons are fluidly connected with each other by a piston connection means in such a way that in parallel mode they are fluidly connected in parallel, and in serial mode, they are fluidly connected in serial. Further, the invention relates to a method of pumping a media fluid under subsea conditions.
Claims24
A subsea multipiston pump for closing a hydraulic ram of a blowout preventer, comprising:
- at least a first and a second piston, oscillatingly arranged to pump a media fluid from a source to a target,
- the first and the second pistons being driven either in a parallel mode oscillating in phase with each other, or in a serial mode oscillating out of phase with each other;
- and
- at least one piston connection device for fluidly connecting the two pistons in a controllable manner, so that in parallel mode the first and the second pistons are pumping the media fluid in parallel, and in serial mode, the first and the second pistons are pumping the media fluid in serial.
An intervention skid for attachment to a remotely operated vehicle, the intervention skid comprising:
- at least one multipiston pump comprising:
- at least a first and a second piston, oscillatingly arranged to pump a media fluid from a source to a target,
- the first and the second pistons being driven either in a parallel mode, where they are oscillating in phase with each other, or in a serial mode, where they are oscillating out of phase with each other;
- and
- at least one piston connection device for fluidly connecting the two pistons in a controllable manner, so that in parallel mode the first and the second pistons are pumping the media fluid in parallel, and in serial mode, the first and the second piston are pumping the media fluid in serial.
A method of pumping a media fluid under subsea conditions from a source to a target, the method comprising:
- pumping the media fluid via a multipiston pump, the multipiston pump comprising at least a first and a second reciprocating piston, oscillatingly arranged to pump a media fluid from a source to a target;
- and
- controlling first and the second pistons being either driven in a parallel mode in phase with each other, or in a serial mode out of phase with each other wherein the first and the second pistons are connected with each other by at least one piston connection device so that in the parallel mode the first and the second pistons are pumping the media fluid in parallel, and in the serial mode, the first and the second pistons are pumping the media fluid in serial.
Dependencies are inferred from the claim text.