RCI Single-Phase Tanks

Collect and maintain fluid samples at in-situ conditions

The Baker Hughes RCI™ single-phase tank systems collect and maintain reservoir fluid samples at in-situ conditions. PVT data is often the first in-depth study of a reservoir and its future production facilities. Single-phase samples determine accurate PVT parameters and assess flow assurance. They maintain integrity of dissolved gases and minerals in formation water sampling. Determining water pH at in-situ conditions helps assess scaling potential.

Our single-phase tank sampling technology maintains reservoir fluid-sample quality above the bubble point and asphaltene deposition envelope. Maintaining reservoir fluid-phase behavior and minimum mud-filtrate contamination ensures that the PVT laboratory will accurately determine PVT.

These properties include gas/oil ratio (GOR), saturation pressure, formation volume factor, and compositional analysis. Because the tanks are constructed from a nickel-based material, they have very low adsorption of H2S and CO2. This prevents overestimating or underestimating completion, maintenance, and production cost.

We offer three different tanks for different environments up to 400 deg. F [204° C] and 25,000 psi [72.3 MPa]. All tanks are DOT transportable, so a mobile laboratory isn’t required for sample transfer. Maximum tank volume is 600cc. Up to 24 tanks can be retrieved, enabling significant rig-time savings.

Our standard single-phase I (SPT I™) tank offers single-phase sampling benefits for environments up to 20,000 psi and 400 deg. F. It can be equipped with our Continuous Data Recorder™ (CDR™), which monitors sample integrity during transport.  

Our single-phase II (SPT II™) tank features an enhanced pressure boosting mechanism. This mitigates sample-cooling effects at retrieval. It has two floating pistons with a predetermined nitrogen charge behind the second piston. The nitrogen piston has a 2:1 compression ratio that doubles the tank’s compensation potential.

Two 15-cc MicroSample tanks validate samples without disturbing the main sample chamber. They’re rated for 25,000 psi (72.3 MPa) and 400 deg. F [204 deg. C].