Method and system for sampling multi-phase fluid at a production wellsite

摘要

A system and method for sampling fluid from a production wellsite are provided. The system includes an interface operatively connectable to the port and a separation circuit operatively connectable to the interface for establishing fluid communication therebetween. The separation circuit includes a pumping unit and at least one sample chamber. The pumping unit includes pumping chambers having a cylinder with a piston therein defining a fluid cavity and a buffer cavity. The fluid cavities define a separation chamber for receiving the fluid and allowing separation of the fluid therein into phases. The buffer cavities have a buffer fluid selectively movable therebetween whereby the fluid flows through the separation circuit at a controlled rate. The sample chamber is for collecting at least one sample of the phases of the fluid.

主权项

1. A system for sampling fluid from a production wellsite, the production wellsite having a tubular extending into a subsea unit for producing a fluid therefrom and a port at the wellsite for accessing the fluid, the system comprising:
an interface operatively connectable to the port for establishing fluid communication therewith; a separation circuit operatively connectable to the interface for establishing fluid communication with the interface and the port, the separation circuit comprising:
a pumping unit comprising a plurality of pumping chambers, each of the plurality of pumping chambers having a cylinder with a piston therein defining a fluid cavity and a buffer cavity, each of the fluid cavities defining a separation chamber for receiving the fluid and allowing separation of the fluid therein into a plurality of phases, each of the buffer cavities having a buffer fluid selectively movable therebetween whereby the fluid flows through the separation circuit at a controlled rate; andat least one sample chamber for collecting at least one sample of the plurality of phases of the fluid;wherein a first buffer cavity is adapted to discharge buffer fluid to an outtake flowline in response to a first fluid cavity receiving fluid while a second buffer cavity is discharging buffer fluid to the outtake flowline in response to a second fluid cavity receiving fluid.