Abstract: An aquifer storage and recovery system can include a pump, an electric motor coupled to the pump, a drive unit configured to control operation of the electric motor, and a controller. The controller can be configured to flow water into a well bore from a source reservoir through the pump such that the pump rotates in a reverse direction and drives the electric motor coupled to the pump in the reverse direction to operate as a generator, determine a power output of the electric motor, determine a difference between the power output of the electric motor and a power output set point, and operate the drive unit to control a rotational speed of the electric motor based at least in part on the difference between the power output of the electric motor and the power output set point.

Abstract: An aquifer storage and recovery system can include a pump, an electric motor coupled to the pump, a drive unit configured to control operation of the electric motor, and a controller. The controller can be configured to flow water into a well bore from a source reservoir through the pump such that the pump rotates in a reverse direction and drives the electric motor coupled to the pump in the reverse direction to operate as a generator, determine a power output of the electric motor, determine a difference between the power output of the electric motor and a power output set point, and operate the drive unit to control a rotational speed of the electric motor based at least in part on the difference between the power output of the electric motor and the power output set point.

Abstract: A trailer jack support comprises a receptacle for receiving a jack post of a trailer jack and a mechanism such as an insert therein for limiting the depth of insertion of the jack post into the receptacle. As a result, the jack post engages the insert with a more limited extension of the jack post. Also, if there is a significant distance between the ground and jack, for example if the trailer happens to be positioned above a depression in the ground, the jack post may not be able to be extended sufficiently to support the jack. By adjusting the elevation of an insert, a trailer jack support in accordance with this disclosure can reduce the extent to which a jack post needs to be extended to accommodate these varying ground conditions.

Abstract: A trailer jack support comprises a receptacle for receiving a jack post of a trailer jack and a mechanism such as an insert therein for limiting the depth of insertion of the jack post into the receptacle. As a result, the jack post engages the insert with a more limited extension of the jack post. Also, if there is a significant distance between the ground and jack, for example if the trailer happens to be positioned above a depression in the ground, the jack post may not be able to be extended sufficiently to support the jack. By adjusting the elevation of an insert, a trailer jack support in accordance with this disclosure can reduce the extent to which a jack post needs to be extended to accommodate these varying ground conditions.

Abstract: In one example, a jack adaptor is mounted to a trailer structure. A jack flange, which can comprise a jack flange extension, of a jack is inserted downwardly through an opening in an upper portion of the jack adaptor. The jack can be rotated to a position that misaligns the jack flange with the opening through which it has been inserted. The jack can then be actuated to raise the jack flange into engagement with the upper portion of the adaptor for use in raising the trailer structure. The process is reversed to disengage the jack flange from the adaptor to permit removal of the jack.

Abstract: A valve assembly for use in aquifer liquid flow control in accordance with one embodiment can be used to deliver liquid to and/or from at least one selected aquifer in a plural aquifer system. In accordance with an embodiment, the valve can be used to route liquid to or from a first aquifer without delivering liquid to or from a second aquifer, or to or from the second aquifer without delivering liquid to or from the first aquifer. As an aspect of an embodiment, the valve assembly can be used to shut off the flow of liquid to both the first and second aquifers.

Abstract: In one example, a jack adaptor is mounted to a trailer structure. A jack flange, which can comprise a jack flange extension, of a jack is inserted downwardly through an opening in an upper portion of the jack adaptor. The jack can be rotated to a position that misaligns the jack flange with the opening through which it has been inserted. The jack can then be actuated to raise the jack flange into engagement with the upper portion of the adaptor for use in raising the trailer structure. The process is reversed to disengage the jack flange from the adaptor to permit removal of the jack.

Abstract: A valve assembly for use in aquifer liquid flow control in accordance with one embodiment can be used to deliver liquid to and/or from at least one selected aquifer in a plural aquifer system. In accordance with an embodiment, the valve can be used to route liquid to or from a first aquifer without delivering liquid to or from a second aquifer, or to or from the second aquifer without delivering liquid to or from the first aquifer. As an aspect of an embodiment, the valve assembly can be used to shut off the flow of liquid to both the first and second aquifers.

Abstract: An aquifer recharge valve assembly comprises a valve movable along the interior of a pipe section to open and close aquifer recharge openings through the pipe section. The position of the valve controls the extent to which the recharge openings are available for delivery of recharge water into the aquifer. The valve may be a seamless resilient cylinder which expands due to well head pressure to assist in sealing the recharge openings when the valve is closed.

Abstract: An aquifer recharge valve assembly comprises a valve movable along the interior of a pipe section to open and close aquifer recharge openings through the pipe section. The position of the valve controls the extent to which the recharge openings are available for delivery of recharge water into the aquifer. The valve may be a seamless resilient cylinder which expands due to well head pressure to assist in sealing the recharge openings when the valve is closed.

Abstract: An aquifer recharge valve assembly comprises a valve movable along the interior of a pipe section to open and close aquifer recharge openings through the pipe section. The position of the valve controls the extent to which the recharge openings are available for delivery of recharge water into the aquifer. The valve may be a seamless resilient cylinder which expands due to well head pressure to assist in sealing the recharge openings when the valve is closed.