Abstract: A method to capture gasses from an upstream underground well during a frac plug drill-out operations, with the use of multiple separation vessels, cross-compression units, flaring and regulation control. The method allows capturing gasses out of a fluid mixture, from the underground well, with flowing the fluid mixture from the underground well towards sequentially a mud-gas separation vessel and a separation vessel, whereby the fluid mixture contains a solid and liquid phase and a gas phase. The method also includes separating the fluid mixture into the solid and liquid phase and the gas phase. The method further includes simultaneously flowing the gas phase towards a flare for burning and towards a sales line, through one or more cross-compression units. One goal of the method may be to recover most of the gas phase towards the sales line for valuing it instead of discharging it to the atmosphere.

Abstract: A method to evacuate a fluid mixture from an underground storage location with the use or regulation control of cross-compression technique. The method allows to evacuate and recover a fluid mixture from an underground storage location. The fluid mixture typically contains a hydrocarbon fluid phase and a brine phase. The method includes separating the fluid mixture in the hydrocarbon fluid phase and the brine phase, inside the separation vessel, and then alternatively pumping each phase of the fluid mixture contained inside the separation vessel towards dedicated containment volumes, using a single pump or multiple pumps, whereby a first containment volume is dedicated to the hydrocarbon fluid phase and a second containment volume is dedicated to the brine phase. The proposed method allows recovering a higher proportion of the fluid mixture, as recycled product, and therefore limiting the combustion or release of hydrocarbon towards the atmosphere.

Abstract: A container which includes a plurality of elongated frame members each having an elongated channel and an elongated recess therein and a plurality of coupling members removably engagable with ends of the frame members. A plurality of panels is removably engagable with the elongated channels in the frame members and each of the panels has an elongated recess around a perimeter thereof which, together with the elongated recess in each of the frame members, forms an elongated slot. A lock element is removably insertable into the slots formed by the panel recesses and frame member recesses, when the panels are in engagement with the channels, to lock the frame members, panels and coupling members into a substantially rigid assembly.