Gas generator for pressurizing downhole samples

摘要

An apparatus for obtaining fluid samples in a subterranean wellbore comprises a carrier assembly configured to be disposed in a subterranean wellbore; a sampling chamber operably associated with the carrier assembly; a pressure assembly coupled to the sampling chamber and configured to pressurize a fluid sample obtained in the sampling chamber, wherein the pressure assembly is configured to contain a pressure generating agent; an activation mechanism configured to activate the pressure generating agent; and a power device operably associated with the carrier assembly and configured to provide an impulse for activating the activation mechanism, wherein the power device is not disposed on the pressure assembly.

主权项

1. A method of pressurizing a fluid sample, the method comprising:
disposing a fluid sampler comprising a sampling chamber, a power device, and a pressure assembly comprising an activation mechanism in a subterranean wellbore, wherein the pressure assembly comprises a pressure generating agent, wherein the power device is positioned between the sampling chamber and the pressure assembly, and wherein the pressure assembly is at or near atmospheric pressure while disposing the fluid sampler in the subterranean wellbore; obtaining a fluid sample in the sampling chamber while maintaining the pressure assembly at or near atmospheric pressure; activating, within the subterranean wellbore, the pressure generating agent with the activation mechanism in response to obtaining the fluid sample in the sampling chamber; generating a pressurized fluid having a pressure greater than atmospheric pressure within the pressure assembly in response to activating the pressure generating agent; and pressurizing the fluid sample using the pressurized fluid.