Abstract: Processes and systems for injecting a fluid into a wellbore. In some examples, the process can include introducing a water-rich product separated from a hydrocarbon production fluid that can include one or more hydrocarbons and water into a fluid storage apparatus. The water-rich product from the fluid storage apparatus can be introduced into a subterranean housing that can include a pressurizing apparatus at least partially disposed therein. The subterranean housing can be at least partially disposed under a surface of the earth. The pressurizing apparatus can have an inlet located within the subterranean housing and below the surface of the earth. The water-rich product from the subterranean housing can be introduced into the inlet of the pressurizing apparatus. A pressurized water-rich product from an outlet of the pressurizing apparatus can be introduced into an injection well.

Abstract: Processes and systems for injecting a fluid into a wellbore. In some examples, the process can include introducing a water-rich product separated from a hydrocarbon production fluid that can include one or more hydrocarbons and water into a fluid storage apparatus. The water-rich product from the fluid storage apparatus can be introduced into a subterranean housing that can include a pressurizing apparatus at least partially disposed therein. The subterranean housing can be at least partially disposed under a surface of the earth. The pressurizing apparatus can have an inlet located within the subterranean housing and below the surface of the earth. The water-rich product from the subterranean housing can be introduced into the inlet of the pressurizing apparatus. A pressurized water-rich product from an outlet of the pressurizing apparatus can be introduced into an injection well.

Abstract: A downhole separator has first and second separation sections each with a housing defining an interior cavity divided into a first chamber and a second chamber by a flow restricting bearing housing. Each separation section has at least two pumping stages that pump production fluid into the first chamber and to the bearing housing. The bearing housing limits flow into the second chamber and generates a pressure drop in production fluid entering the second chamber, separating gas from liquid. A vortex generator in the second chamber segregates the liquid to the outside and the gas to the inside of the second chamber. The upstream separation section has a greater capacity than the downstream separation section.

Abstract: A downhole separator has first and second separation sections each with a housing defining an interior cavity divided into a first chamber and a second chamber by a flow restricting bearing housing. Each separation section has an internal pump that pumps production fluid into the first chamber and to the bearing housing. The bearing housing limits flow into the second chamber and releases pressure on gas in the production fluid entering the second chamber, separating gas from liquid. A vortex generator in the second chamber segregates the liquid to the outside and the gas to the inside of the second chamber. The bearing housing of the upstream separation section has a greater capacity than the bearing housing of the downstream separation section.

Abstract: A downhole separator has a housing defining an interior cavity divided into a first chamber and a second chamber by a flow restricting bearing housing. A shaft driven impeller pumps production fluid into the first chamber and to the bearing housing. The bearing housing generates a pressure drop in production fluid entering the second chamber, separating gas from liquid. A vortex generator in the second chamber segregates the liquid to the outside and the gas to the inside of the second chamber. A downhole separation method includes pumping production fluid into a first chamber, and generating a pressure drop in the fluid as the fluid enters a second chamber to separate gas and liquid.