Abstract: A sensor assembly (51) for sensing one or more fluid properties of a fluid in a subsurface well (12) having a well fluid level (42W), a surface region (32) and a riser pipe (30) includes a sensor apparatus (52) and a pump assembly (54) that are positioned within the well (12). The sensor apparatus (52) includes a sensor (682) that senses one of the fluid properties. The pump assembly (54) can be positioned in an in-line manner relative to the sensor apparatus (52). The pump assembly (54) can be positioned between the sensor apparatus (52) and the surface region (32). Alternatively, the sensor apparatus (52) can be positioned between the pump assembly (54) and the surface region (32). In one embodiment, the sensor apparatus (52) is positioned above the well fluid level (42W). The pump assembly (54) can pump fluid toward the sensor apparatus (52) or the pump assembly (54) can pump fluid to draw more fluid to the sensor apparatus (52).

Abstract: A sensor assembly (51) for sensing one or more fluid properties of a fluid in a subsurface well (12) having a well fluid level (42W), a surface region (32) and a riser pipe (30) includes a sensor apparatus (52) and a pump assembly (54) that are positioned within the well (12). The sensor apparatus (52) includes a sensor (682) that senses one of the fluid properties. The pump assembly (54) can be positioned in an in-line manner relative to the sensor apparatus (52). The pump assembly (54) can be positioned between the sensor apparatus (52) and the surface region (32). Alternatively, the sensor apparatus (52) can be positioned between the pump assembly (54) and the surface region (32). In one embodiment, the sensor apparatus (52) is positioned above the well fluid level (42W). The pump assembly (54) can pump fluid toward the sensor apparatus (52) or the pump assembly (54) can pump fluid to draw more fluid to the sensor apparatus (52).

Abstract: A zone isolation assembly for a fluid monitoring system in an existing subsurface well includes a fluid receiving pipe, a docking receiver, a docking apparatus and a first sealer. The fluid receiving pipe includes a pipe interior and a fluid inlet structure. The fluid receiving pipe receives a fluid through the fluid inlet structure into the pipe interior. The docking receiver is connected to the fluid receiving pipe. The docking apparatus moves between (i) a docked position wherein the docking apparatus is docked with the docking receiver, and (ii) an undocked position wherein the docking apparatus is undocked with the docking receiver. The first sealer is spaced apart from the docking apparatus. In certain embodiments, the first sealer selectively forms a fluid-tight seal between the fluid receiving pipe and the casing to divide the fluid zone into a first zone and a spaced apart second zone.

Abstract: A zone isolation assembly array (794) for a well (712) includes a first zone isolation assembly (722A) and a second zone isolation assembly (722B). The first zone isolation assembly (722A) selectively inhibits fluid communication between a first zone (726) and a second zone (728) of the well (712). The second zone isolation assembly (722B) selectively inhibits fluid communication between the second zone (728) and a third zone (796) of the well (712). In another embodiment, the zone isolation assembly array (794) includes a first docking receiver (748A), a second docking receiver (748B), a first docking apparatus (750A) and a second docking apparatus (750B). The docking receivers (748A, 748B) can be positioned in an in-line manner. The second docking apparatus (750B) is coupled to the first docking apparatus (750A).

Abstract: A zone isolation assembly array (794) for a well (712) includes a first zone isolation assembly (722A) and a second zone isolation assembly (722B). The first zone isolation assembly (722A) selectively inhibits fluid communication between a first zone (726) and a second zone (728) of the well (712). The second zone isolation assembly (722B) can be positioned between the first zone isolation assembly (722A) and a surface region (32) of the well (712) in an in-line manner. The second zone isolation assembly (722B) selectively inhibits fluid communication between the second zone (728) and a third zone (796) of the well (712). In another embodiment, the zone isolation assembly array (794) includes a first docking receiver (748A), a second docking receiver (748B), a first docking apparatus (750A) and a second docking apparatus (750B). The docking receivers (748A, 748B) can be positioned in an in-line manner. The second docking apparatus (750B) is coupled to the first docking apparatus (750A).

Abstract: A zone isolation assembly (22) for a subsurface well (12) having a surface region (32), a first zone (26) and a second zone (28) includes a docking receiver (48) and a docking apparatus (50). The docking apparatus (50) is selectively moved relative to the docking receiver (48) between a disengaged position and an engaged position. In the disengaged position, the first zone (26) is in fluid communication with the second zone (28). In the engaged position, the first zone (26) is not in fluid communication with the second zone (28) during movement of a fluid between the first zone (26) and the surface region (32). The docking apparatus (50) can be maintained in the engaged position substantially by a force of gravity. The zone isolation assembly (22) can include a pump assembly (54) that pumps the fluid while the docking apparatus (50) is in the engaged position. The zone isolation assembly (22) can include a fluid collector (52) that collects the fluid when the docking apparatus (50) is in the engaged position.

Abstract: A zone isolation assembly array (794) for a well (712) includes a first zone isolation assembly (722A) and a second zone isolation assembly (722B). The first zone isolation assembly (722A) selectively inhibits fluid communication between a first zone (726) and a second zone (728) of the well (712). The second zone isolation assembly (722B) can be positioned between the first zone isolation assembly (722A) and a surface region (32) of the well (712) in an in-line manner. The second zone isolation assembly (722B) selectively inhibits fluid communication between the second zone (728) and a third zone (796) of the well (712). In another embodiment, the zone isolation assembly array (794) includes a first docking receiver (748A), a second docking receiver (748B), a first docking apparatus (750A) and a second docking apparatus (750B). The docking receivers (748A, 748B) can be positioned in an in-line manner. The second docking apparatus (750B) is coupled to the first docking apparatus (750A).

Abstract: A docking receiver (48) for a subsurface well (12) having a fluid inlet structure (29), a riser pipe (30) and a docking apparatus (50) includes an upper section (372A) and a lower section (374A). The upper section (372A) is secured to the riser pipe (30). The lower section (374A) is secured to the fluid inlet structure (29). The lower section (374A) receives the docking apparatus (50) into an engaged position wherein fluid communication between a first zone (26) and a second zone (28) of the well (12) is inhibited. The lower section (374A) includes a contact surface (376A) and a distal region (377A). The contact surface (376A) contacts the docking apparatus (50) when the docking apparatus (50) is in the engaged position. The distal region (377A) is positioned more distally from a surface region (32) of the well (12) than the contact surface. The lower section (374A) can have a lower inner diameter (380UD, 380LD) that varies within the distal region (377A).