Abstract: A single phase fluid sampler system and associated methods. A fluid sampling method includes the steps of: receiving a fluid sample into a sample chamber of a fluid sampler; pressurizing the fluid sample using a pressure source; and increasing pressure in the pressure source while the pressure source is in the well, thereby applying increased pressure to the fluid sample in the sample chamber. Another method includes the step of applying pressure to the well to thereby increase pressure in the pressure source, and to thereby increase pressure on the fluid sample. A fluid sampler system includes a fluid sampler with a sample chamber, a pressure source for pressurizing the sample chamber, and a device which operates to increase pressure in the pressure source while the fluid sampler is in the well.

Abstract: A hydraulic control and actuation system for downhole tools. In a described embodiment, a hydraulic control and actuation system includes an internal chamber serving as a low pressure region and a well annulus serving as an energy source. A valve assembly provides selective fluid communication between alternating opposite sides of a piston and each of the energy source and low pressure region. Displacement of the piston operates a well tool. Operation of the valve assembly is controlled via telemetry between a remote location and an electronic circuit of the system.

Abstract: In a subterranean well completion a bi-directional signal transmission system includes an in-line acoustic transceiver mounted in a tubing string extending through the wellbore, the transceiver being disposed beneath a hanger structure engaging the tubing string. Via the tubing string the transceiver receives acoustic signals from well parameter sensing apparatus further downhole and converts the received acoustic signals to non-acoustic signals. The resulting non-acoustic signals are then transmitted upwardly through the hanger structure, to a signal receiving location, via cabling. In this manner, the hanger structure does not adversely affect the strength of either upwardly or downwardly transmitted signals traversing it. Alternatively, the acoustic well parameter signals received by the transceiver are converted to electromagnetic signals which pass through the earth, are picked up by a receiver external to the well completion, and then relayed to the receiving location.